[tex] \huge \mathsf \blue{Question}[/tex]
Explain why "selectively permeable" is a good way to describe a cell membrane.
[tex] \huge \mathsf \blue {Answer}[/tex]
The plasma membrane is called a selectively permeable membrane as it permits the movement of only certain molecules in and out of the cells. Not all molecules are free to diffuse. If plasma membrane ruptures or breaks down then molecules of some substances will freely move in and out of the cells.
As the plasma membrane acts as a mechanical barrier, the exchange of material from its surroundings through osmosis or diffusion in a cell won’t take place. Consequently, the cell would die due to the disappearance of the protoplasmic material. It allows hydrophobic molecules and small polar molecules diffuse through the lipid layer, but does not allow ions and large polar molecules cannot diffuse through the membrane.
Whats the difference between solve and NSolve?
Using machine (inexact) numbers, NSolve uses mathematics to calculate a result. On the other hand, if the input only contains exact numbers and no machine numbers, solves the equation symbolically or with exact numbers first.
What makes solve and NSolve different from one another?To solve an equation or group of equations algebraically, use the function solve. Although it is sometimes preferable to have a numerical solution, it is not always possible to solve an equation algebraically. In either scenario, a group of equations or an individual equation can be solved numerically using NSolve.
Describe NSolve.Equation, "Variable = initial value," NSolve identifies numerically all possible answers to the given equation for the provided unknown variable and its initial value.
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I don’t understand this
The toy does not approach the spring.
What is friction?The force that prevents one solid object from slipping or rolling over another is known as friction.
Mass of the toy-car: m = 2 kg.
Initial speed of it: v = 2 m/s.
Coefficient of friction: μ = 0.14
Distance between the initial position and the spring: s = 3 m.
Kinetic energy of it at initial = 1/2 × 2 × 2² joule = 4 joule.
Work done against frictional force = μ×mg×s = 0.14 × 2 × 9.8 × 3 joule = 8.232 joule.
It can be seen that initial energy of the toy is less than the required energy ( which is used against frictional force as a work done) to reach at the spring. So, the toy does not approach the spring.
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What is the wavelength of 3 Hz?
A wave's duration, T, is 13 seconds if its frequency, f, is 3 Hz.The wavelength is 5 meters long.This indicates that wave moves 5 m in one interval.
What wavelength does one hertz have?Sounds in air at a frequency of one hertz (Hz):340 m A:These molecules are already flowing in the direction of the source in response to the loudspeaker membrane's inward motion.
A 3 wavelength lamp: what is it?A blue light LED chip, a green light LED chip, as well as a red fluorescent film are employed as light sources and a light transition layer, respectively, in a three spectrum organic light - emitting diode (LED) arrangement.
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If the distance between the two spheres a and b is 500 cm, find the location for the third sphere c so that the net force on it is zero.
Given that the third sphere is located at force x = 175 cm
Therefore, route two multiplied by the and divided by twplus one will be closed to route X. Okay, so this is how the X is expressed. This is the party, then. Now, in the party, we must locate what we have.
R = 500 cm, and x = 0.35R.
Therefore, x = 0.35 500 cm and x = 175 cm.
Therefore, the third sphere needs to be positioned 175 cm apart from the first sphere force.
The arrangement below shows the placement of two spheres, A and B. mA = 3m and mB = 8m. 8m is the mass of sphere C. Considering that A and B are separated by 500 cm,
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what is the best way to push an object? by using your upper body strength by using your upper body strength by using your hip and leg muscle by using your hip and leg muscle by leaning into the object with your body weight by leaning into the object with your body weight by pushing with the strength in your arms
It's indeed safer to push than to pull whenever feasible.If an item must be hauled, keep it close to your body and centered between the shoulders and hips.Bend between the waist and shoulders while attempting to maintain a straight back.Always avoid pulling or pushing things up high.
Which muscles work best when lifting something?Keep in mind that the quadriceps (thighs), gluteus (buttocks), and abdominal muscles are your LIFTING MUSCLES.
When pushing anything, how should you move your body correctly?Put your hands on anything and bend your elbows to push it.Apply steady, sustained pressure by moving your weight from the back leg to the front leg.Figure: Grab the item and bend your elbows to pull it.
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When Apollo 15 astronaut David Scott did his famous freefall experiment on the Moon, he dropped a falcon feather from a height of about 1.6 meters. Assuming a gravitational acceleration of 1.6 m/s2 on the Moon, about how long did it take the feather to drop to the surface?
The time taken for the feather to drop to the surface, given that the gravitational acceleration is 1.6 m/s², is 1.4 s
How do I determine the time?From motion under gravity, we understood that height and time are related according to the follwing formula:
h = ½gt²
Where
h is the heightg is the acceleration due to gravityt is the timeUsing the above formula, we can obtain the time taken for the feather to drop to the surface. Details below:
Height (h) = 1.6 metersGravitational acceleration (g) = 1.6 m/s²Time taken (t) = ?h = ½gt²
1.6 = ½ × 1.6 × t²
1.6 = 0.8 × t²
Divide both side by 0.8
t² = 1.6 / 0.8
Take the square root of both side
t = √(1.6 / 0.8)
t = 1.4 s
Thus, the time take is 1.4 s
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Problem 1: A box rests on a horizontal surface. You apply a force on the box of F= 100 N at an angle, 0, below the horizontal and it slides at a constant velocity. The friction force that acts on the box is: Multiple Choice : 1) 100 Newtons. 2) less than 100 Newtons. 3) greater than 100 Newtons. у F 0 m y. X
On a horizontal surface, a box is perched. The box glides at a constant speed when you apply a force of 100 N at an angle of 0 below the horizontal. Less than 100 N of frictional force is exerted on the box.
A box is moving steadily at 0.55 m/s down an incline slope. All forces operating on this container must result in a vector that points. None of the alternatives above. A extremely thin rope is used to drop a bucket at a steady descending speed. The rope's tension must match the weight of the bucket. If the box is subjected to a force F with an angle p as illustrated,what is the smallest value of below which, regardless of the, the box will not move; A 55.0-kg box is positioned horizontally. The box and the surface have a static friction coefficient of 0.300. What must be put to the box horizontally in order for it to begin.
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if the triple beam balance scale and spring scale were taken to the top of mt. everest, do you think they measure same as in nyc?
No, the triple beam balance scale and spring scale would not measure the same as in NYC if taken to the top of Mount Everest.
This is because the atmospheric pressure at the top of Mount Everest is much lower than the atmospheric pressure at sea level. As atmospheric pressure changes, the weights of objects change as well. This phenomenon is referred to as barometric pressure.
The barometric pressure at the top of Mount Everest is around 250 mmHg, whereas the pressure at sea level is 760 mmHg. Since the atmospheric pressure is much lower at the top of Mount Everest, the weight of the objects being measured on the triple beam balance scale and the spring scale would be lower than they would be at sea level.
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What is true about radiation Mcq?
Your body contains a variety of radioactive isotopes is the one that best describes radiation.
What is the definition of radioactive isotopes?(RAY-dee-oh-I-suh-tope) an unstable variation of a chemical substance that emits radiation as it disintegrates and grows more stable. Both natural and artificial radioisotopes can be created. They are employed in medical practice for both therapy and imaging examinations. termed radionuclide as well.
Why do radioactive isotopes pose a threat to human life?When a human inhales or consumes a radioisotope, it is dispersed to various organs and stays somewhere for days, months, or years, producing a constant dose of radiation, until it decays or is expelled (committed dose). consequences include baldness, skin burns, nauseousness, gastrointestinal trouble, or death (Acute Radiation Syndrome).
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Esme is planning to go on a hot air balloon ride soon. as time passes, the balloon will get higher in the atmosphere, and as the balloon gets higher, the temperature gets cooler. esme has been researching the mathematics behind her balloon ride and found these two functions: esme is wondering if there is a relationship between the time in flight and the temperature. if height depends on time, and temperature depends on height, can a relationship between time and temperature be formed?
Yes, there is a relationship between time and temperature in a hot air balloon ride, because the temperature changes as the balloon ascend or descend in the atmosphere. If height depends on time and temperature depends on the height, then it is possible to establish a relationship between time and temperature.
One way to do this would be to use the equations that describe the height and temperature as a function of time to calculate the temperature at various times during the balloon ride. For example, if the height of the balloon as a function of time is given by the equation h(t) and the temperature as a function of height is given by the equation T(h), then the temperature at a given time t can be calculated using the equation T(h(t)).
It's important to note that the specific form of the equations for height and temperature will depend on the conditions of the balloon ride, such as the rate at which the balloon ascends or descends, the atmospheric conditions, and other factors. Therefore, it will be necessary to use the appropriate equations and input values in order to accurately calculate the temperature at a given time during the balloon ride.
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Two horses have hooves of about the same area. Horse A has a much bigger mass than horse B. How would the pressure that they produce on the ground be different?
The pressure will be different because of the difference in the masses of horse A and horse B.
Horse A will have greater pressure due to much bigger mass.
Who do horses have hooves?In order for a horse to survive and operate, its hooves are necessary. Throughout a horse's lifetime, its hooves expand. Each foot of a horse has a single, solid hoof. The size of this might vary according on the breed, size, and running and jumping prowess of the horse.
Scholars have long disagreed on how animals—whose predecessors were dog-sized creatures with three or four toes—came to have only one hoof. According to a recent research, when horses grew bigger, one big toe was shown to be more resistant to bone stress than several smaller toes.
Thus, horse A will have greater pressure due to much bigger mass.
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Quantum Physics vs Newtonian Physics
Quantum physics and Newtonian physics are two different frameworks for understanding the behavior of matter and energy at different scales.
Newtonian physics, also known as classical mechanics, is based on the work of Isaac Newton and describes the motion of macroscopic objects, such as cars, planets, and baseballs. It is based on the principles of mass, force, and acceleration, and it is very successful at predicting the behavior of objects moving at speeds that are not too close to the speed of light.
Quantum physics, on the other hand, is a theory that describes the behavior of matter and energy at the atomic and subatomic scale. It is based on the idea that energy, matter, and the fundamental building blocks of the universe, such as electrons and photons, can exhibit both wave-like and particle-like properties. Quantum physics also introduces the concept of probability, which allows for the prediction of the likelihood of certain outcomes but not the exact outcomes themselves.
While Newtonian physics and quantum physics may seem quite different at first glance, they are actually complementary theories that can be used to describe the behavior of matter and energy in different situations. In many cases, the predictions of quantum physics agree with those of Newtonian physics, but there are also situations where quantum physics makes predictions that differ from those of classical mechanics.
What is the most common type of genetic disease?
The most prevalent, deadly hereditary disease in the US is cystic fibrosis (CF). disorders brought on by a gene mutation. Think about sickle cell disease.
What is a typical genetic illness?Genetic conditions. Crohn's disease. CF. Dysplastic fibrosis Cirrhosis liver fibrosis disease Brain, Nerves, and Spine When your genes or chromosomes undergo a mutation, genetic illnesses result. While some illnesses manifest symptoms from birth, others do so over time.
Which of the following 4 genetic illnesses are they?There are four primary categories: illnesses with a single gene. hereditary inheritance illnesses with multiple factors. aberrant chromosomes. diseases caused by mitochondrial genetic inheritance. Chromosome abnormalities occur when one or more chromosomes (or chromosome segments) are absent or altered.
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was your test designed to do?
A. In order to increase the current flowing through the lightbulb, the team wanted to find a way to decrease voltage.
B. In order to reduce the current flowing through the lightbulb, the team wanted to find a way to increase voltage.
C. In order to increase the current flowing through the lightbulb, the team wanted to find a way to increase resistance.
D. In order to reduce the current flowing through the lightbulb, the team wanted to find a way to increase resistance.
In order to reduce the current flowing through the lightbulb, the team wanted to find a way to increase resistance. Hence, option (D) is correct.
What is Ohm's law?
Ohm's law is one of the most fundamental and significant principles governing electrical circuits.
Under the assumption that all physical parameters and temperatures remain constant, Ohm's law asserts that the voltage across a conductor is directly proportional to the current flowing through it.
Mathematically, V = IR
Hence, The team was trying to figure out a technique to increase resistance at constant voltage supply in order to decrease the current flowing through the lightbulb.
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5.112. moving moving wedge. a wedge with mass m rests on a frictionless, horizontal tabletop. a block with mass m is placed on the wedge (fig. p5.112a). there is no friction between the block and the wedge. the system is released from rest. (a) calculate the acceleration of the wedge and the horizontal and vertical components of the acceleration of the block. (b) do your answers to part (a) reduce to the correct results when m is very large? (c) as seen by a stationary observer, what is the shape of the trajectory of the block?
A moving wedge, wedge with mass m rests on a frictionless, horizontal tabletop. a block with mass m is placed on the wedge (fig. p5.112a). there is no friction between the block and the wedge. the system is released from rest. Acceleration of the wedge if the system is released from rest = (M+m)gcotQ.
Acceleration- Acceleration is defined as the rate at which velocity changes with time, in terms of both speed and direction. A point or an object moving in a straight line is accelerated if it speeds up or slows down. Motion on a circle is accelerated even if the speed is constant, because the direction is continually changing.
Therefore, the acceleration of the wedge from solution in the image, is (M+m)gcotQ.
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the greater efficiency achieved with the curved blades of a pelton wheel is due to
The greater efficiency achieved with the curved blades of a Pelton wheel is due to the fact that the curved blades create a Venturi effect, which increases the velocity of the water as it passes through the wheel. This increased velocity results in a greater amount of energy being extracted from the water, resulting in a higher efficiency.
What are 2 equations for calculating wavelength?
λ = v/f. Wavelength, velocity, and frequency are all given in units of meters, seconds, and hertz (Hz).
Which two equations represent wave speed?Wavelength and frequency are related to wave speed via the wave speed equation (Speed = Wavelength x Frequency). This equation can be used to determine wave speed when the wavelength and frequency are known.
Which two frequency formulas are there?The frequency formula in terms of time is provided as follows: f = 1/T, where T is the duration of one cycle in seconds and f is the frequency in hertz. The formula for calculating frequency in terms of wavelength and wave speed is given as f = /, where is the wave speed and is the wavelength of the wave.
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What are 2 examples of irony in The Interlopers?
In “The Interlopers”, irony is a key element the author Saki uses to convey the theme that when people hold grudges, the outcome of the feud is often tragic and The dramatic irony is that both men wish to meet the other man face to face with no witnesses around—each man has the wish to kill the other.
What is an irony?
Irony in its broadest sense is the juxtaposition of what appears to be on the surface and what is or is expected to be. It is an important rhetorical and literary technique.
Sarcasm can be divided into several types, such as verbal sarcasm, dramatic sarcasm, and circumstantial sarcasm. Verbal, dramatic, and situational sarcasm are often used to emphasize truthful claims. An ironic form of simile used in sarcasm, and some forms of ritote, are deliberate words that convey the opposite of the truth, deny the opposite of the truth, or grossly and clearly disrespect the facts. May be used to emphasize the importance of a person.
Therefore, In The Interlopers, Irony is a key element for author Saki to convey the theme, and when people hold grudges, the consequences of feuds are often tragic, and the dramatic irony is that both men are shunned by the other. It's about seeing someone face it because they want to see it. Face it with no witnesses around - each person has a desire to kill the other person.
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a convex spherical (diverging) mirror with a focal length of 25 cm has a 4.0 cm tall object placed 100 cm in front of it. what is the position of the image relative to the mirror? (also drawing a ray diagram might help)
The position of the image relative to the mirror v = 20cm, position of the image behind the mirror.
Since object is always placed in front of the mirror
Hence, object distance will be negative
Object distance (u) = - 100cm
Focus of a convex mirror is behind the mirror
Hence focal length will be positive
Focal length (f)= + 25cm
Find position of the image
Let the image distance = v
Using formula,
[tex]\frac{1}{v}[/tex] +[tex]\frac{1}{u}[/tex] = [tex]\frac{1}{f}[/tex]
[tex]\frac{1}{v}[/tex] = [tex]\frac{1}{f} - \frac{1}{u}[/tex]
[tex]\frac{1}{v} = \frac{1}{25} - \frac{1}{-100}[/tex]
[tex]\frac{1}{v} = \frac{1}{25} + \frac{1}{100}[/tex]
[tex]\frac{1}{v} = \frac{4 + 1}{100}[/tex]
[tex]\frac{1}{v} = \frac{5}{100}[/tex]
v = [tex]\frac{100}{5}[/tex]
v = 20cm
Since v is positive
Hence, image is 20cm behind the mirror
Nature of image is Virtual and erect.
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Jayce goes on a bike ride to Luc’s house. What will be his velocity if he is traveling at 31 km/h for 12.5 minutes?
The velocity if he is traveling at 31 km/h for 12.5 minutes is 149.04
How to solve for the velocityWhen an item is moving, its velocity is the rate at which it is changing position as seen from a specific point of view and as measured by a specific time standard.
We have the formula for velocity as
V = distance / time
the distance = 31 km/h
the time = 12.5 minutes
convert the time to hours to get the velocity
12.5 minutes / 60
= 0.208 hrs
Then the velocity = 31 km/h / 0.208
= 149.04
Hence the velocity is 149.04
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How long will it take a horse to gallop 20 miles at 4mph
hours
Answer:
1 hour 30 minutes
Explanation:
because it is going 4 miles and i did this and i got it right
jannah is trying to replace the lens on her camera. what should she look for on both the lens and the circular base to help her do this?
To replace the lens on a camera, Jannah should look for a series of matching features on both the lens and the circular base of the camera. These features will help her to properly align and attach the lens to the camera.
On the lens, Jannah should look for a mounting index, which is typically a small dot or line on the lens barrel. This mounting index helps to align the lens with the mount on the camera.
On the circular base of the camera, Jannah should look for the lens mount, which is a series of metal contacts and a mechanical linkage that allows the lens to be securely attached to the camera. The lens mount typically consists of a set of flanges or lugs that correspond to the mounting index on the lens.
To attach the lens to the camera, Jannah should align the mounting index on the lens with the lens mount on the camera, and then turn the lens in a clockwise direction until it is securely attached. Some lenses may require a specific torque to be tightened properly, so it is important to follow the manufacturer's instructions when attaching the lens.
Once the lens is properly aligned and attached, Jannah should check to make sure that the lens is securely fastened to the camera and that it is properly seated in the lens mount. If the lens is not securely attached or is not properly seated, it may not function properly or may become damaged.
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what does theta and sin have to do with a pendulums harmonic motion
Answer:
are u a gìrl?????????......
What is the name of the relationship between wavelength and frequency?
According to the equation, v = f λ, frequency and wavelength are inversely proportional to each other.
The SI unit of wavelength is meter usually denoted as m. While measuring wavelength the multiples or fractions of a meter is also used.
What is a meter?
The meter was originally defined in 1793 as one ten-millionth of the distance from the equator to the North Pole along a great circle, making the circumference of the Earth approximately 40,000 km. In 1799, the meter was redefined as a prototype meter (the actual bar used was changed in 1889). In 1960, the power meter was redefined in terms of a certain number of wavelengths of a certain krypton-86 emission line. The current definition was adopted in 1983 and slightly modified in 2002 to make it clear that the meter is a measure of proper length.To know more about meter, click the link given below:
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A mass is pulled on a frictionless inclined plane
What is it's speed at the bottom of the incline?
Answer:
I mean its frictionless and its at the bottom so wouldn't it be 0.
Explanation:
which type of photon is emitted when an electron in a hydrogen atom drops from the n=2 to the n=1
An ultraviolet type of photon is released whenever an electron inside a hydrogen atom transitions from the n-2 to the n-1 energy level.
An electron is a negatively charged neutron star that can be either free or bonded to an atom (not bound). An atom has three basic types of particles: protons, neutrons, and the electron that is connected to them.
The electrons are an atom's negatively charged building blocks. A negatively charged atom is created when all of an atom's electrons come together to balance off the positive charge that protons have inside the atomic nucleus. Electrons are the most abundant element in the universe.
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How do orbital resonances with jupiter affect the asteroid belt?
Planetesimals' orbits were disturbed by orbital resonance with Jupiter, which prevented them from accreting into planets.
Orbital resonance happens when the gravitational forces of celestial bodies that are periodically orbiting one another interact, and this interaction is sometimes expressed as a ratio of tiny integers.
Jupiter has the ability to influence the asteroid belt since it is so large and is located very close to the asteroid belt compared to other planets. Asteroids are literally pushed out of the orbital resonances with Jupiter at the locations where they exist, leaving empty space in their wake.
Since Daniel Kirkwood, an American astronomer, was able to foresee and characterise such occurrences in the middle of the 1800s, the region has been virtually free of asteroids. Kirkwood gaps were later used to describe this paucity of asteroids in the region of Jupiter's orbital resonances.
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How do you write an inverse variation equation given X and Y?
The formula y=k x or x y=k represents an inverse variation. In other words, if there is a nonzero constant k such that x y=k or y=k x where x0, y0, y varies inversely as x.
The variation formula is either y = k/x or k = x y.
Replace with the supplied values to determine the value of k.
With the known value for k, rewrite the variation equation as y = k/x.
Find the unidentified by substituting the remaining values.
According to the expressions "y varies inversely as x" and "y is inversely proportionate to x," y decreases as x increases or vice versa. There are two translations for this idea. For some constant k, referred to as the constant of proportionality, y x = k. If the constant is desired, use this translation.
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From the definition of the standard Ohm calculates the resistivity and conductivity of mercury at 0°
C. Given that standard Ohm is the resistance of thread from mercury with a uniform cross-sectional
area 1mm2 and its length 106.3 cm at 0°C. (hint: standard Ohm has a resistance of unity)
The resistance of the wire as shown is obtained as 106.3 * 10^4 Ohm.
What is the resistance?We know that the term resistance has to do with the degree of the opposition that is offered to the flow of current. We should know that the resistivity is the opposite of conductivity. We can see that in this case we have to write down the formula of the resistance as;
R = ρl/A
R = resistance
ρ = Resistivity
l = length
A = Area
Then we have for the mercury;
R = 1 * (106.3 * 10^-2)/( 1 * 10^-6)
R = 106.3 * 10^4 Ohm
The wire would have a resistance of 106.3 * 10^4 Ohm.
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A stream is 30. Meters wide and its current flows southward at 1. 5 meters per second. A toy boat is launched with a velocity of 2. 0 meters per second eastward from the west bank of the stream. How much time is required for the boat to reach the opposite bank of the stream?.
The time required for the toy boat to reach the opposite bank of the stream is 20 seconds.
To solve this problem, you need to use the concept of vector addition to find the net velocity of the toy boat relative to the ground. The net velocity of the toy boat is equal to the velocity of the current plus the velocity of the toy boat relative to the current.
The velocity of the current is 1.5 meters per second southward, and the velocity of the toy boat is 2.0 meters per second eastward. When these velocities are added vectorially, the resulting net velocity is 2.6 meters per second at an angle of 63.4 degrees east of south.
To find the time required for the toy boat to reach the opposite bank of the stream, you can use the distance traveled and the speed to calculate the time using the equation t = d/s, where t is the time, d is the distance, and s is the speed.
The distance traveled is 30 meters (the width of the stream), and the speed is 2.6 meters per second. Plugging these values into the equation gives you a time of t = 30 meters / 2.6 meters per second = 11.54 seconds. Rounding up to the nearest whole number gives you a time of 20 seconds.
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