I think it because of UV rays ultra violet ray which can make their colors different
a flashlight bulb with a potential difference of 6.0 v across it has a resistance of 8.0 how much current is the bulb filament
Answer:
I = 0.75 Amp
Explanation:
Ohm's Law
Ohm's law states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points. The constant of proportionality is called the Resistance (R) of the conductor.
The formula can be expressed as:
V = I.R
The intensity of the current through a resistor can be calculated by solving the equation for I:
[tex]\displaystyle I=\frac{V}{R}[/tex]
A flashlight bulb is an example of a resistor with the specific task to emit light when it's hot enough.
The potential difference (or voltage) is V=6 V and the resistance is R=8Ω, thus the current is:
[tex]\displaystyle I=\frac{6~V}{8~\Omega}[/tex]
I = 0.75 Amp
An object originally moving at a speed of 20. meters per second accelerates uniformly for 5.0 seconds to a final speed 50. meters per second. What is the acceleration of the object, in m/s2 to the nearest tenth?
A football player kicks a ball with an initial velocity of 25 m/s at an angle of 53 degrees above the horizontal. The vertical component of the initial velocity of the ball
Answer:
20 m/s
Explanation:
initial velocity, u= 25m/s
u has two components. one in horizontal and in one vertical.
so,
u sin theta = vertical component.
=> u sin theta = 25× 4/5
= 20 m/s
(a) Complete the table below to identify the physical quantities as scalars or vectors.
scalar or vector
physical quantity
speed
velocity
distance
force
kinetic energy
A scalar quantity is different from a vector quantity as the scalar quantity as only magnitude and no direction whereas the scalar quantity has both the magnitude and direction.
A scalar quantity is different from a vector quantity in many aspects such as a scalar quantity has only magnitude, but no direction. However, a vector quantity has both the magnitude and direction. Every scalar quantity is one-dimensional only. Whereas, vector quantity can be one, two or three-dimensional.
Speed is a scalar quantity, velocity is a vector quantity, distance is a scalar quantity, force is a vector quantity, and kinetic energy is a vector quantity.
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A bulldozer pushes on a boulder with a force of 600 N. It accelerates at 3 m/s. Find mass.
Answer:
Formula for mass: m=f/a
m=600/3
The mass is 200.
Explanation:
Hope this helps!
answer number 19 pls
Answer:
1. Net force = 90 N
2. Acceleration = 9 m/s²
Explanation:
From the question given above, the following data were obtained:
Mass (m) of bag = 10 Kg
Force applied 1 (Fₐ₁) = 45 N
Force applied 2 (Fₐ₂) = 60 N
Force of friction (Fբ) = 15 N
Net force (Fₙ) =?
Acceleration (a) =?
1. Determination of the net force acting on the bag.
We'll begin by calculating the total force applied on the bag.
Force applied 1 (Fₐ₁) = 45 N
Force applied 2 (Fₐ₂) = 60 N
Total force applied = Fₐ₁ + Fₐ₂
Total force applied = 45 + 60
Total force applied = 105 N
Finally, we shall determine the net force acting on the bag. This is illustrated below:
Total force applied = 105 N
Force of friction (Fբ) = 15 N
Net force (Fₙ) =?
Net force (Fₙ) = Total force applied – Force of friction (Fբ)
Net force (Fₙ) = 105 – 15
Net force (Fₙ) = 90 N to the right
2. Determination of the acceleration of the bag.
Mass (m) of bag = 10 Kg
Net force (Fₙ) = 90 N
Acceleration (a) =?
Force (F) = mass (m) × acceleration (a)
90 = 10 × a
Divide both side by 10
a = 90 / 10
a = 9 m/s²
Thus, the acceleration of the bag is 9 m/s² to the right.
Two or more atoms that have been chemically combined are
called a
molecule
formula
poly atom
mixture
Answer:
When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound. Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).
Explanation:
i think its mixture.
When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound.
What are compound?Most elements on Earth bond with other elements to form chemical compounds, such as sodium (Na) and Chloride (Cl), which combine to form table salt (NaCl).
Any substance made up of similar molecules with atoms from two or more different chemical elements is referred to as a chemical compound.
Atoms from more than 100 different chemical elements, both in their pure forms and when mixed to form chemical compounds, make up all matter in the universe.
Therefore, When two distinct elements are chemically combined—i.e., chemical bonds form between their atoms—the result is called a chemical compound.
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Melissa my pet cow from childhood that i could ride like a horse had a weight of 0.65 tons. Philip my pet rabbit had a weight of 192 ounces. How many philips would it take to weigh as much as one melissa
Answer:
11 times the weight of Philip.
Explanation:
From the question given above, the following data were obtained:
Weight of Melissa (i.e cow) = 0.65 tons
Weight of Philip (i.e rabbit) = 192 ounces
Next, we shall express the weight of Philip (i.e the rabbit) in tons. This can be obtained as follow:
1 ounce = 3.125×10¯⁵ ton
Therefore,
192 ounce = 192 ounce × 3.125×10¯⁵ ton / 1 ounce
192 ounce = 0.06 ton
Thus, the weight of Philip (i.e the rabbit) in ton is 0.06 ton.
Next, we shall determine the ratio of the weight of Melissa (i.e the cow) to the weight of Philip (i.e the rabbit). This can be obtained as follow:
Weight of Melissa (i.e cow) = 0.65 ton
Weight of Philip (i.e rabbit) = 0.06 ton
Melissa /Philip = 0.65/0.06
Melissa /Philip = 11
Melissa = 11 × Phillip
Thus, it will take 11 times the weight of Philip to weigh as much as Melissa.
So I don’t really get it can you also explain what’s the difference between radiation,conduction, and convection?
Answer:
I think its radiation
Explanation:
Conduction is the transfer of heat through solids (A)
Convection is the transfer of heat through liquids or gasses (B)
Radiation is the transfer of heat through em waves (C)
Which body system includes protection of internal organs and blood cell formation? (4 points)
a
Integumentary system
b
Muscular system
c
Skeletal system
d
Cardiac muscular system
Answer:
The answer is C Skeletal System
How is the atomic mass of an atom determined?
Answer:
Atomic mass is defined as the number of protons and neutrons in an atom
Two blocks are connected as shown in the diagram below. Assume that the ramp is frictionless. Draw the force diagram for the block on the ramp
x-apple-ql-id://72E64017-DA83-43AB-B493-EDC462018E16/x-apple-ql-magic/35856A40-E2D1-4A5F-A1C7-B39A61D6F3E7.pdf
What is the x-component of the force of gravity acting on the block on the ramp?
What is the acceleration of the block?
Answer:
diagram: see image, x-component: 84.3 N, acceleration: 4.38 m/s^2
Explanation:
(see image for further explanation)
a train covers half of its journey with a speed of 20 metre per second and the other of with the speed of 30 metre per second the average speed of the pain during the whole journey is
Answer:
25 meters per second
Explanation:
2 halves so you find the average of the two by adding 20+30=50 then dividing it by number of halves, this is 2.
50/2=25
how is work related to energy?
Explanation:
Energy should be transferred to an object in order to move it. ... This amount of energy transferred by the force to move an object is called work or work done. Thus, the relation between Work and Energy is direct. That is, the difference in the Kinetic energy of an object is work done by an object.
A ball falls from a shelf. Assuming there is no friction, why is the conservation of mechanical energy independent of mass?(1 point)
The displacement of the ball is insignificant compared with Earth's size.
The mass of the ball is insignificant compared with the mass of Earth.
Mass is eliminated when equating elastic potential energy with kinetic energy.
Mass is eliminated when equating gravitational potential energy with kinetic energy.
Answer: C
Explanation: Mass is eliminated when equating elastic potential energy with kinetic energy.
Mass is eliminated when equating gravitational potential energy with kinetic energy. Therefore option D is correct.
What is gravitational potential energy?The energy that an item has or acquires when its location changes as a result of being in a gravitational field are known as gravitational potential energy. Gravitational potential energy can be defined as energy that has a connection to gravitational force or gravity.
The energy of gravity, or gravitational potential energy, is also related to the Earth. An object has gravitational potential energy if it is at a certain height above the Earth's surface. The object's potential energy is transformed into kinetic energy when it is released. Due to the rule of conservation of energy, the sum of the two is always constant.
The test object is positively pulled by the gravitational force from infinity to a location inside the gravitational field. Because gravitational force is inverse square, it is 0 at infinity. As a result, infinity is used as the starting point.
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Which image shows both potential and kinetic energy?
A swing hangs straight down from a frame.
A swing hangs from a frame out at a 45 degree angle.
A swing hangs from a frame out at a 90 degree angle.
Answer:
The one in the middle
Explanation: i listened to the other person and i got it wrong, this is the answer for edge2020 sience review on energy!!!!
trust me its the middle one!!!!!
And everyone if ur not sure, like 100% sure about an answer dont answer at all cuz for 1: ur taking up a spot for others to answer. for 2: you could make people wrong. And for 3: its annoying. And 4: it makes stuff like this happen!
NOT ARGUEING IM JUST PUTTING MY THOUGHTS AND OPINIONS OUT THERE ;) many thanks.
Answer:
B. 45 degree
Explanation:
Which of the following is most likely to produce a loud echo? Explain your answer.
Talking in a furnished, carpeted room
Singing in a tiled shower
Yelling across an open field
Number 3
plzlzllzllz mark as a brainiest!
Answer:
b
Explanation:
yes
A sprinter speeds up to 3 m/s during the last 2 seconds of the race with an
acceleration of 0. 4 m/s 2 . What was the initial speed of the sprinter?
Answer:
The initial speed of the sprinter was 2.2 m/s
Explanation:
Constant Acceleration Motion
It's a type of motion in which the velocity of an object changes by an equal amount in every equal period of time.
The following relation applies:
[tex]v_f=v_o+at[/tex]
Where a is the constant acceleration, vo the initial speed, vf the final speed, and t the time.
The sprinter speeds up from an unknown initial speed to vf=3 m/s in t=2 seconds with an acceleration of [tex]a=0.4~m/s^2[/tex].
To find the initial speed, we solve the equation for vo:
[tex]v_o=v_f-at[/tex]
Substituting the values:
[tex]v_o=3-0.4*2[/tex]
[tex]v_o=3-0.8[/tex]
[tex]v_o=2.2~m/s[/tex]
The initial speed of the sprinter was 2.2 m/s
State the career function of Automobile engineering
Answer:
Explanation:
It helps engineer automobiles. Every day companies are looking for brighter ideas for cars and other vehicles
Answer:
Automotive engineers work as part of a team responsible for vehicle design, development, manufacture and testing. Automotive engineers are involved in the design, manufacture, distribution, marketing, sales and after-sales care of cars (including racing cars), motorbikes and other commercial vehicles.
Explanation:
Question 1 (1 point)
A boy on a treasure hunt walks 12 paces West, then 21 paces North, then 25 paces
East. What is the magnitude of boy's resultant displacement in meters?
Answer:
The magnitude of the boy's displacement is 24.698 paces which is in the direction of approximately 58.24° North of East
Explanation:
The given parameters are;
The distance West the boy on a treasure hunt walks = 12 paces
The distance North the boy on a treasure hunt then walks = 21 paces
The distance East the boy on a treasure hunt then walks = 25 paces
Writing the displacement in vector format, gives;
d = -12·i + 21·j + 25·i
Which gives
d = 13·i + 21·j
The magnitude of the boy's resultant displacement is given as follows;
[tex]\left | \mathbf{d} \right | = \sqrt{d_x^2 + d_y^2}[/tex]
Where;
[tex]d_x = 13, \ d_y = 21[/tex]
[tex]\left | \mathbf{d} \right | = \sqrt{13^2 + 21^2} = \sqrt{610} \approx 24.698 \ paces[/tex]
The magnitude of the boy's displacement is 24.698 paces
The direction of the displacement is tan⁻¹(21/13) ≈ 58.24° North of East.
Which physical property is best measured using only a balance?
A. Color
B. Volume
C. Mass
D. Density
Answer:
The answer is Mass
Explanation:
I took the tests and study kinda yeahhhhhh
AHHHHHHHHHHHHHHHHHh chicks butts
the mass of the whole object is equal to the sum of all its parts A. Law of Conservation of Energy B. Law of Conservation of Mass C. Law of Conservation of Weight
HELP PLEASE ILL GIVE YOU BRAINLIEST OR WHATEVER AND LIKE 30 POINTS JUST PLEASE ANSWER ME
Answer:
B. Law of Conservation of Mass
Explanation:
In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system.
Sort the statements based on whether they are correct or incorrect.
All waves have the same
wavelength.
Radio telescopes give us
information about the
birthplace of a star.
If the wavelength of a wave
increases, its frequency
also increases.
Visible light is a kind of
electromagnetic wave.
All objects emit
electromagnetic waves.
Correct
Incorrect
All waves have the same wavelength. wrong
Radio telescopes give us information about the birthplace of a star. I think wrong but I'm not sure.
If the wavelength of a wave increases, its frequency also increases. wrong
Visible light is a kind of electromagnetic wave. right
All objects emit electromagnetic waves. right
All waves have the same wavelength is an incorrect statement.
Radio telescopes give us information about the birthplace of a star is a correct statement.
If the wavelength of a wave increases, its frequency also increases is an incorrect statement.
Visible light is a kind of electromagnetic wave that is a correct statement
All objects emit electromagnetic wave is a correct statement
What is an electromagnetic wave?Electromagnetic waves are waves that are generated as a result of oscillation between an electric field and a magnetic field. In other words, EM waves are a combination of vibrating magnetic and electric fields and these two fields are orthogonal to each other. Electromagnetic waves propagate in a transverse direction therefore these waves are also known as transverse waves.
Therefore, it is incorrect to say that all waves have the same wavelength.
It is true to say that radio telescopes can tell us where a star was born.
It is untrue to say that as a wave's wavelength increases, so does its frequency.
It is true to say that visible light is a type of electromagnetic wave.
It is true to say that all objects emit electromagnetic waves.
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which two actions would strengthen an electromagnet?
A. Add and ammeter into the circuit.
B. Decrease the size of the permanent magnet in the circuit.
C. increase the number of wraps of wire around the core.
D. Replace the magnetic core with aluminum nails.
E. Connect a second battery in the circuit.
please help!!!!, ONLY ANSWER IF YOU KNOW IT
Answer:
C. increase the number of wraps of wire around the core.
E. Connect a second battery in the circuit.
Explanation:
got the question current on a p e x
increase the number of wraps of wire around the core and Connect a second battery in the circuit are the two actions would strengthen an electromagnet.
what are the types of wiring ?
The distribution electrical power through wires in a perfect manner inside a building or a room with better load control is known as electrical wiring.
Different types of wiring such as Tee system or Joint box system where the connection of appliances is done with this wiring, which does not consume too much cable size.
Loop-in system means the system is used in lamps and other appliances are parallelly connected so that each appliance is controlled individually.
Cleat Wiring consists of ordinary VIR or PVC insulated wires is compounded on walls and ceilings by means of porcelain cleats, wood, or plastic, temporary system and is not suitable for domestic usage. For example, used in an under-construction building.
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1. When a car turns sharply to the right, objects in the back seat move to the left. Why?
2. What type of motion does an object have if it is falling with terminal velocity
Answer:
Explanation: It is inertia that causes the passengers to move toward the right side of the car. As the car swerves to left, passengers' body continues their motion as hitherto and as such it causes the passengers to move toward the right side of the car.
F = M x G
Find the force of gravity acting upon a 1500Kg Hippopatamus.
Answer:........... .. .....
The invisible boy
what is the Theme of the story?
Answer:
the theme is acceptably of others
Explanation:
hope this helps
the waves that travel along the surface of the oceans are referred to as? A) surface waves B) circular waves C) transverse D) longitudinal
Answer:
surface waves
Explanation:
they are on the surface of the ocean
Betsy created the following mnemonic device to help her remember the order of the planets starting from the Sun: “Most Very Elegant Mammals Sleep Just Until Noon”. Why doesn’t her mnemonic work?
a) She has Saturn and Jupiter in the wrong order.
b) She has Mercury and Venus in the wrong order.
c) She has Uranus and Neptune in the wrong order.
d) She has Earth and Mars in the wrong order.
Answer:
A
Explanation:
The order of the planets in the solar system, starting nearest the sun and working outward is the following: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
How is the propulsion necessary to move a spacecraft through space different from the propulsion necessary to move an airplane through the air?
Answer:
Spacecraft Propulsion Systems Spacecraft propulsion is based on jet propulsion as used by rocket motors.
Explanation:
The maximum air temperature permitted for delivery vehicles when receiving shell eggs Shell eggs Receive at an air temperature of 45°F (7°C) or lower.
In which case one can reject the delivery?When receiving raw shell eggs you must reject the delivery if they don't conform to the standard range of conditions. Raw egg shells at temperature of 45°F or below should be rejected during delivery as a result of the possibility of the presence of pathogens on them which exposes individuals to diseases.
The common pathogen found in eggs is Salmonella which causes typhoid. All egg shells should be treated at higher temperatures in order to destroy them.
Raw egg shells at temperature of 45°F or below should be rejected during delivery as a result of the possibility of the presence of pathogens on them which exposes individuals to diseases.
Therefore, The maximum air temperature permitted for delivery vehicles when receiving shell eggs Shell eggs Receive at an air temperature of 45°F (7°C) or lower.
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