The vast size of our solar system makes it impossible for a large, civilization-threatening asteroid or comet to collide with earth is the False statement.
What is an asteroid?Small, stony objects called asteroids orbit the Sun. Despite orbiting the Sun similarly to planets, asteroids are far smaller than planets. Small, stony objects called asteroids orbit the sun.
What is a comet?Large ice and dust-based bodies known as comets orbiting the Sun. Most recognisable for their lengthy, streaming tails.
Comet or large, civilization-threatening asteroid has nothing to do with the vastness of solar system in effecting the earth from damage to the human race or to destroy it completely.
Civilization-threatening asteroid or comet large enough to do serious damage to the human race will eventually collide with Earth even if the solar system is very vast.
Hence, the vast size of our solar system makes it impossible for a large, civilization-threatening asteroid or comet to collide with earth is the False statement.
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below are six different sequences of snapshots taken as the two pulses meet in the middle of the string. time increases from top to bottom in each sequence. which sequence correctly represents the displacement of the string as the pulses interfere?
Option C is the sequence which correctly represents the displacement of the string as the pulses interfere. When a wave pulse encounters a free end then it reflects the same way as incident path which is depicted in option C.
Longitudinal waves are waves in which the medium is moved in the same direction as the wave's propagation. The wavelength determines the separation between the centres of two adjacent compression or rarefaction areas.
An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an aeroplane or a lecturer moves to the right in relation to a whiteboard. Displacement describes this shift in location.
The amount of medication needed to replace 1 gramme of suppository base is known as the displacement value. Coca Butter or Theobroma oil is the most used foundation for suppository preparation. Suppositories are traditionally made in suppositories moulds, which typically accommodate 1 or 2 grammes of base.
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a garden hose attached with a nozzle is used to fill a 20-gallon bucket. the inner diameter of the hose is 1 inch and it reduced to 0.5 inches at the nozzle exit. if the average velocity in the hose is 8 ft/s, determine:
In order to calculate average velocity, divide the change in position or displacement (x) by the time intervals (t) during which the displacement takes place. Depending on the displacement's sign, the average velocity can either be positive or negative. metres per second is the average velocity SI unit.
acceleration: the rate at which the speed and direction of a moving object vary over time. When anything moves faster or slower, it is said to be accelerating or decelerating in a straight line. Since the trajectory is always changing, travel on a circle accelerates even while the speed is constant.
A1=(1/2)ˆ2 x 22/7
A1= 0.785
A2= 0.0625 x22/7
A2=0.196
V=(A1-A2)xv
V=0.589x8
V=4.72
= 8.33 / 4.72 mass flow rate
1.76 gal/s of mass flow
Duration: 20/1.76
duration: 11.36 seconds
A1v1=A2v2
A1v1/A2=v2
v2=8x0.785/0.196
v2=32.0 ft/s
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a tow truck exerts a force of 450 lb on a car, causing it to accelerate at 10ft/s^2 . what is the mass of the car? group of answer choices 45 slugs 45 kg none of the above 45 lbm
Angle 32rad turn during that time if the angular acceleration is constant.
What is acceleration?
acceleration, rate at which the velocity changes with time, in terms of both speed and the direction. A point or else it's an object moving in a straighten line is accelerated if it is speeds up or slows down. Motion on a circle is the accelerated even if the speed is constant, because of the direction is continually changing.
Sol- In an uniformly accelerated circular motion, the angle traveled by the object is given by- ∆=wf+wo/2×t
Here wf is the final angular speed.
It is the initial angular speed and t is the time of the motion. Replacing the given values-
∆= 12 rad/s + 4 rad/s /2 (4s)
∆= 32rad .
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suppose the potential energy of the block at the table is given by mgh/3 . this implies that the chosen zero level of potential energy is __________.
suppose the potential energy of the block at the table is given by mgh/3. this implies that the chosen zero level of potential energy is a distance of 2h/3 above the floor.
In physics, potential power is the electricity held by way of an item due to its position relative to other items, stresses inside itself, its electric fee, or other factors. The term potential strength became brought by way of the 19th-century Scottish engineer and physicist William Rankine
Not unusual kinds of capacity strength consist of the gravitational capacity power of an object, the elastic ability strength of a prolonged spring, and the electric capability energy of an electric fee in an electric field. The unit for electricity in the worldwide gadget of units (SI) is the joule, which has the symbol J.
Because the paintings of capacity forces appearing on a body that actions from a beginner to a cease position are determined simplest with the aid of these positions and do no longer depend upon the trajectory of the body, there is a characteristic called capacity that can be evaluated at the two positions to determine these paintings.
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nichrome wire 85 cm long and 0.25 mm in diameter is connected to a 1.6 volt flashlight battery. what is the electric field inside the wire?1.88 correct: your answer is correct. v/m
The electric field will be 1.9 V /m
The length of the wire is l = 85.
The diameter of the wire is d = 0.25mm
.The voltage of the battery is V = 1.6 V.
(a) The expression for the electric field inside the wire is,
E=( V / L )
Substituting the given values in the above expression, we will get
E = 1.6V / 85cm ( 1m /100cm)
= 1.6V / 0.85 m
= 1.88 V / m
= 1.9 V / m
Hence, the electric field will be 1.9 V /m.
What do you mean by Electric Field ?
Electric field can be defined as an electric property which is associated with each point in the space where a charge is present in any form. An electric field is also described as the electric force per unit charge.
The formula of electric field is given as;
E = F /Q
Where,
E is the electric field.
F is a force.
Q is the charge.
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.
Find the magnitude and vector direction of the sum of these two vectors:
Magnitude of the resultant vector is 20.03.
What is resultant vector?A resultant vector is described as a single vector that has the same consequence as several other vectors taken together. To create the resulting vector, two vectors facing the opposite direction are subtracted from one another. Here, the vector B is pointing in the opposite direction of the vector A, and the resulting vector is called R.
Resultant vector = [tex]\sqrt{A^2 + B^2 + 2AB cos\theta}[/tex]
Resultant vector = [tex]\sqrt{9.66^2 + 12^2 + 2(9.66)(12) cos45}[/tex]
Resultant vector = 20.03
Magnitude of the resultant vector is is 20.03.
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as light hits the retina, the first structure the light encounters is a rod or a cone. as light hits the retina, the first structure the light encounters is a rod or a cone. true false
As light hits the retina, the first structure the light encounters is a rod or a cone is a false statement.
What is Retina?The layers of light-sensitive nerve tissue at the back of the eye that take in images and transmit them as electric signals to the brain via the optic nerve is termed as retina.
What is light?Electromagnetic radiation that can be seen by the human eye is known as light or visible light. Typically, visible light is characterized as having wavelengths between 400 and 700 nanometers, or 750 and 420 terahertz, or frequencies between the infrared and the ultraviolet.
Contrary to what might make sense, light has to pass through the ganglion cells first, through the bipolar cells, and finally strikes the rods and the cones.
Hence, as light hits the retina, the first structure the light encounters is a rod or a cone is a false statement.
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7) someone suggests that astronomers build a special gamma-ray detector to detect gamma rays produced during the proton-proton chain in the core of the sun, just like they built a neutrino detector. explain why this would be a fruitless effort.
Through the act of counting and calculating the energy of single photons emitted from elements, gamma ray detectors calculate electromagnetic radiation.
Gamma-ray detection is carried out photon-by-photon, just as X-ray detection. By observing the impact they have on materials, gamma rays can be found. A gamma ray can drive an electron to a higher level or collide with it and cause it to scatter like a pool cue (Compton scatter) (photoelectric ionization).
Protons are transformed into neutrons, positrons, and electron neutrinos as part of the proton-proton chain, which generates a significant amount of energy. The primary reaction in the majority of main-sequence stars, including the Sun, is the proton-proton chain. A nuclear fusion reaction, the proton-proton chain releases energy as the energy in the nuclear bonds diminishes. To counteract the protons' natural tendency to resist one another, smaller nuclei must have more energy.
An atom of the unstable isotope germanium-71 can be created when a neutrino interacts with a gallium-71 atom. The germanium was then concentrated and removed chemically. As a result, neutrinos were discovered by monitoring germanium's radioactive decay.
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Mort and Velma are twins, born at the same time on Earth. Velma is taken on a long trip into outer space, at a speed close to light speed, and returns to Earth. When she returns,
a. Mort and Velma both observe that Velma is older than Mort.
b. Mort and Velma both observe that Mort is older than Velma.
c. Mort observes that he is older than Velma, and Velma observes that she is older than Mort.
d. Mort observes that he is younger than Velma, but Velma will observe that she is younger than Mort.
e. Mort and Velma observe that they have aged equally
Using the concepts of light, we got that option b)Mort and Velma both observe that Mort is older than Velma is observed by Velma who is taken on a long trip into outer space, at a speed close to light speed.
Light or visible light is the electromagnetic radiation that can be perceived by human eye. Visible light is usually defined as having wavelengths in range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz, between infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths).
In physics, the term "light" may actually refer more broadly to electromagnetic radiation of any wavelength, whether the visible or not.[4][5] In this sense, gamma rays, X-rays, microwaves and the radio waves are also light. The primary properties of light are the intensity, propagation direction, frequency or the wavelength spectrum and polarization.
Hence, Mort and Velma are twins, born at the same time on Earth, when Velma is taken on a long trip into outer space, at a speed close to light speed, and returns to Earth, and when she returns, Mort and Velma both observe that Mort is older than Velma.
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A plane travels a distance of 5. 0×102 m north while being accelerated uniformly from rest at the rate of 5. 0 m/s2. What final velocity does it attain?.
The final velocity it attains is 70.7 m/s
Velocity is the directional velocity of an object in movement as a demonstration of its price of exchange in function as found from a specific body of reference and as measured by using a specific well-known time.
Speed is the time fee at which an item is shifting along a direction, at the same time as velocity is the rate and route of an object's movement. placed any other way, speed is a scalar cost, whilst pace is a vector.
Speed is the velocity at which something moves in a selected course. for example, the velocity of a car traveling north on a highway, or the velocity at which a rocket travels after launching. In the scalar manner, the absolute price value of the rate vector is continually the velocity of the motion.
Calculation:-
v² = U² + 2aS
V² = 0 + 2×5×500
V² = 5000
V = 70.7 m/s
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the resistance of a drill is ___ ohms where the nameplate supplies the following information: 5.4 amps 120 volts
Answer: 648 Ohms
Explanation:
RA = VI
Resistance = voltage x current
R = 120V x 5.4 = 648 Ohms
a grinding wheel is rotating with an angular velocity of 251 radians per second, find the period of one revolution.
Using the concepts of angular velocity, we got that 0.025sec is the period of one revolution for a grinding wheel which is rotating with an angular velocity of 251 radians per second.
We know that angular velocity is defined as the change of angular displacement with respect to time.
or ,ω=θ/t
Here, grinding wheel is circular in shape means total angular displacement is 360 degree or 2[tex]\pi[/tex]
So according to the formula,
=>251=2π/t
=>t=2π/251
=>t=(2×3.14)/251
=>t=6.28/251
=>t=0.025sec
Hence, if a grinding wheel is rotating with an angular velocity of 251 radians per second, the period of one revolution is 0.025sec.
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I need to know the why for the two questions.
4. If the moon falls, it does not get closer to earth due to the effect of gravity.
5. On increasing the mass of the sun then the earth's tangential velocity also increases.
4)Similar to how the earth orbits the moon, but because of the speed at which it caught up to the earth, the moon is prevented from colliding with the planet by the force of gravity.
Because of this, even though the moon is edging a tiny bit farther from our planet, it is kept in a pretentious orbit around it.
5) the earth tangential velocity increases if the mass of the sun increased.
Tangential velocity :It is the linear component of any object's speed that is travelling in a circle.
To keep an object moving uniformly in a circle, a stronger centripetal force is needed.4. If the moon falls, it does not get closer to earth due to the effect of gravity.
5. On increasing the mass of the sun then the earth's tangential velocity also increases.
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The reason that most seti programs choose to listen at microwave radio frequencies is that.
Microwaves are most energy efficient way to send information.
What are SETI programs?Electromagnetic waves are a general term for familiar light and radio waves, but they also include gamma rays, X-rays, ultraviolet rays, and infrared rays. All of these forms of electromagnetic radiation or waves travel at the speed of light, the highest possible speed. The only difference between these types of electromagnetic waves is their length, or wave, or "wavelength." Another way to characterize waves is the number of waves received per second, since they all travel at the speed of light. This is the wave frequency. A specific range of radio frequencies from 1 GHz to 10 GHz, "microwaves", is particularly well suited for interstellar communications. At lower frequencies, our galaxy emits enormous amounts of radio waves, creating a large amount of background noise. At higher frequencies, the Earth's atmosphere, and possibly other Earth-like planets, absorb and emit a wide range of radio frequencies. The result is a quiet "microwave window" that enables efficient wireless communication.
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Explain how the model shows selective permeability of the membrane to specific ions.
The model depicts two types of distinct, water-soluble ions—solid and spotted—but only the solidly coloured ions traverse the membrane channel into the cell, demonstrating the selective permeability of the membrane to particular ions. Since the membrane is only selectively permeable to the solid coloured ions in this instance, the dotted ions cannot pass through it.
Define selective permeability?
Selective permeability describes the plasma membrane's capacity to let some chemicals pass through while preventing others.Through the plasma membrane's selective permeability, the cell may control the admission of chemicals.Passive or energetic passage of substances across the membrane are both possible.
Similar conditions must be met for substances to flow through the plasma membrane; for example, glucose must be carried into the gate while tiny, non-polar molecules like oxygen and carbon dioxide can pass through with ease.
Because of its composition and structure, the plasma membrane exhibits selective permeability. A phospholipid bilayer makes up its structure.
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What type of magnetism is present in a paper clip when it is attracted to a nearby bar magnet?.
Answer:magnetically polarized
Explanation:A steel paper clip near a magnet will be magnetically polarized by the magnet so that it is at least temporarily a magnet. If we use the magnetic pole model of magnets, the side of the clip near a North pole of a magnet will become a South pole, and the other side will become a North pole.
Gold has a density of 19,300 kg/m³. Calculate the mass of 0.02 m³ of gold in kilograms.
Suppose that you are holding a pencil balanced on its point. If you release the pencil and it begins to fall, what will be the angular acceleration when it has an angle of 10. 0 degrees from the vertical? a typical pencil has an average length of 15. 0 cm and an average mass of 10. 0 g. Assume the tip of the pencil does not slip as it falls.
If the pencil falls from a perfectly vertical position while maintaining its angular acceleration, the time it takes for it to hit the ground is 0.4299s.
How to calculate the time taken?The passing time is calculated by dividing the distance by the speed. To find the distance, multiply the speed by the passage of time. The simplified form of these equations is s=d/t, where s stands for speed, d for distance, and t for time.
[Time = Distance Speed] is the formula for calculating time. Utilizing the formula [Distance = Speed Time], one can determine the distance.
The angular acceleration will be determined using Newton's second angular law. As follows:
τ = I α
ωr = I α
Here, the pencil's center is where the weight is placed, ,
sin 10 = r / (L/2)
Maker is the subject of the formula
r = L/2 sin 10
The moment of inertia at that point will be:
I = 1/3 M L²
(1/3 m L2) = mg L / 2 sin 10
αf = 3/2g/Lsin 10
α = [3/2 × 9.8] / [0.150 sin10]
α = 17 rad/s²
The moment of inertia is then: The angle between the vertical and the ground is then:
θ = π / 2
t = √(2 π/2 α )
t = √(π / α )
t = √(π / 17)
t = √3.142 / 17
t = √0.1848
t = 0.4299s
The angle from the vertical to the ground will then be denoted as: As a result, the time it takes for the pencil to touch the ground is 0.4299 seconds.
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Which statement best describes a weak base?(1 point)
a.) It donates protons and only partially dissociates in water.
b.) It accepts protons and only partially dissociates in water.
c.) it donates protons and completely dissociates in water.
d.) It accepts protons and completely dissociates in water.
Answer:
It accepts protons and only partially dissociates in water.
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What new rock formations did you see when the landscape was only exposed to energy from the sun?.
The rock formations that are visible when the landscape is exposed to energy from the sun are sedimentary rocks.
A landscape is a geomorphological unit that is categorized based on characteristics such as elevation, slope, orientation, stratification, rock exposure, and soil type.
Sedimentary rock or also known as sedimentary rock is a rock that forms on the surface of the earth under conditions of low temperature and pressure. These rocks originate from rocks that were formed earlier, which experience weathering, and erosion, and then weathering is transported by water, air, or ice, which are then deposited and accumulate in depositional basins, forming sediments. These sedimentary materials then compact, harden, undergo lithification, and form sedimentary rocks.
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an object is at rest on the ground. the object experiences a downward gravitational force from earth. which of the following predictions is correct about why the object does not accelerate downward? select two answers. justify your selections.
Predictions about why the object does not accelerate downward are (1) the bonded molecules of the object are repelled upward by the bonded molecules of the ground with the same magnitude as the gravitational force downward on the object, and (2) the normal force is exerted upward on the object from the ground with the same magnitude as the gravitational force downward on the object.
What is the normal force?The normal force is simply the force that two surfaces in contact exert to each other to prevent themselves from passing through each other. Since the normal force is a contact force, two surfaces that aren't in contact can't exert a normal force on each other. The normal force will be as large as necessary to make net force equal zero.
The normal force is generated by the electromagnetic force: the electrons in an object are pushing against the electrons in another object.
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1) a solid sphere has a radius of 5 cm and a mass of 350 grams. what is its average density? a hollow sphere has the same radius and mass. what is its average density?
To calculate the average density of the hollow sphere learn the radius and density.
What is radius?
Simply halving the circle's diameter yields the radius formula. The radius of the ring is the line segment formed when we join a point on a circle's circumference to the exact center. The radius of a circle is the distance separating its center from its perimeter.
What is density?
When a material is packed tightly, it is said to have a high density. Its definition is the ratio of mass to volume. Density begins with the letter D. density formula is given as = m/V for objects with masses m and volumes V.
Volume of solid sphere = 4 pi r^3 / 3
= 4 x pi x 5^3 / 3
= 523.6 cm^3
mass = 350 g
average density = mass / volume
= 0.668 g/cm^3 Or 668 kg / m^3
If Sphere is hollow, then also it will acquire same volume in the space.
hence average velocity will not change.
Therefore, its average density is 0.668 g/cm^3 Or 668 kg / m^3
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Ebo throws a ball into the air its velocity at the start is 18m/s at an angle of 37° to the ground. What is the range of the ball
The range of the ball, given that it was thrown with a velocity of 18 m/s at an angle of 37 ° is 31.78 m
How to determine the range of the ball?The range of the ball can be obtained by using the following formula:
R = u²Sine(2θ) / g
Where
R is the rangeu is the initial velocity θ is the angle of projectiong is acceleration due to gravityFrom the question given above, the following data were obtained:
Initial velocity (u) = 18 m/sAngle of projection (θ) = 37 ° Acceleration due to gravity (g) = 9.8 m/s²Range (R) =?The range of the ball can be obtained as follow:
R = u²Sine(2θ) / g
R = 18² × Sine (2×37) / 9.8
R = 31.78 m
Thus, the range of the ball is 31.78 m
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place the elements in order from smallest to largest atomic number.
iron
sodium
uranium
neon
silicon
Answer: Neon,Sodium, Silicon, Iron and Uranium.
Test
Consider two planets that have the same mass but are very different in size. Which statement describes the gravitational pull
that an object would experience on the surface on each planet? (1 point)
O The object would experience a much greater gravitational pull on the larger planet.
O The object would experience the same gravitational pull on each planet.
O The object would experience only a slightly greater gravitational pull on the larger planet.
O The object would experience a greater gravitational pull on the smaller planet.
When an object is placed on the surface of two planets that have the same mass but are very different in size, then the the object would experience a greater gravitational pull on the smaller planet.
What is the weight of an object and what is acceleration due to gravity?
Weight of an object:
The force exerted by gravity on a body or an object is known as weight.The formula provides the weight of an object mathematically;W = mg
Where;
The object's mass is m.
Gravitational acceleration, or g, is measured.
Acceleration due to gravity, g:
The acceleration that objects experience due to the combined action of gravity and centrifugal force is known as the Earth's gravity, or g, and it is represented by the Greek letter g.The formula for calculating gravitational acceleration is g = GM/r2.The square of the distance from the planet's core and the acceleration caused by gravity, or g, are inversely proportional. Likewise, if there were two planets with the same mass but different sizes. Take into account the fact that planet A's radius is smaller than planet B's radius. This implies that the planet A's g will be higher than the planet B's g. Since the object's mass is constant, the weight of the object on planet A will be higher than the weight of the object on planet B.
Hence, The object would experience a greater gravitational pull on the smaller planet.
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what is the net torque about the axle? express your answer in newton-meters to two significant figures.
The net torque in the above case would be 0.2 N m
T = r x F net
T = 0.02 x (30-20)
T = 0.2 N m
What is net torque in physics?
Net Torque can be defined as one force acting on an object to cause torque. It is the sum of the individual torques. The standard unit is Newton meters, or Nm. It can be either static or dynamic. The daily examples of torques include opening a bottle cap or turning a steering wheel.
Applications of torques include
Seesaws and WrenchesGyroscopesA pendulum or a parachute is applying torque when swingingA person riding a bicycleFlag flying on a mastThis is how net torque is used in the above case.
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what is the maximum value the string tension can have before the can slips? the coefficient of static friction between the can and the ground is 0.60.
It will take 3.07 m long to reach at its maximum value
The volleyball will reach at the maximum height at 0.673 s after it is served.The Calculating for the height the volleyball will reach before going to downwards. Therefore the volleyball will do have a maximum value of 3.07 m with respect to the ground.
3.78 m Ignoring resistance, the ball will travel upwards until it's velocity is 0 m/s. So we'll first calculate how many seconds that takes.
7.2 m/s / 9.81 m/s^2 = 0.77945s
The distance traveled is given by the formula d = 1/2 AT^2, so substitute the known value for A and T, giving
d = 1/2 A T^2 d = 1/2 9.81 m/s^2 (0.77945 s)^2 d = 4.905 m/s^2 0.607542 s^2 d = 2.979995
m So the volleyball will travel 2.979995 meters straight up from the point upon which it was launched. So we need to add the 0.80 meters initial height.
d = 2.979995 m + 0.8 m = 3.779995
m Rounding to 2 decimal places gives us 3.78 m.
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at what altitude should a satellite be placed into circular orbit so that its orbital period is 48 hours?
In order for the satellite to have an orbit with a 48-hour period, its orbit must be positioned in a circular orbit at an altitude of 60.689*106m. At this time, altitude is calculated from Earth's surface.
Therefore, the radius of the Earth is subtracted from the total radial distance to get the altitude of the satellite's orbit. orbit of a satellite Satellite orbits are divided into high and low orbits, polar orbits (when the earth's spin axis is included within the orbit plane), equatorial orbits (when the earth's equatorial plane coincides with the orbit plane), and pro-grade and retrograde or bits (the direction of satellite motion is either eastward or westward).
R = 67.067*10^6 m
As a result, height (h) is equal to total radial distance (r) minus earth's radius (R). For example, h=(60.067 - 6.378)*106m; h= 60.689*106m.
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water is moving at a velocity of 2.00 m/s through a hose with an internal diameter of 1.90 cm. what is the flow rate in liters per second? (you do not need to enter any units.)
A hose's internal diameter is 1.90 cm, and the water is flowing through it at a speed of 2.00 m/s. 4021 liters per second (L/s) is the flow rate.
Describe some instances of velocity.The speed at which an object is moving in a certain direction is known as its velocity, to put it simply. Using a car traveling north on a highway as just an example, or a rocket once it has taken off as a speed example. According to the definition of a scalar, the absolute magnitude of the velocity vector is always equal to the speed of the motion.
In physics, what does the term "velocity" mean?A body's or an object's velocity determines which way it moves. Speed is often a scalar variable. Velocities are vector quantities in their most basic form. It gauges how quickly an area changes in distance. The displacement's pace of change is what matters. 1.90 cm, ter. In liters per second
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What is the relative age of the crater copernicus?
The relative age of the crater Copernicus is 800 million years.
Crater is nothing but a large bowl-shaped cavity in the ground or on a celestial object, typically one caused by an explosion or the impact of a meteorite.
Copernicus is a lunar impact crater located in eastern Oceanus Procellarum. It was named after the astronomer Nicolaus Copernicus. It typifies craters that formed during the Copernican period in that it has a prominent ray system. It one of the most prominent craters on the Moon. It constitutes a classic example of a relatively young, well-preserved lunar impact crater.
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