Answer:
This is green light
Explanation:
According to the photoelectric effect, the maximum kinetic energy of an photoelectron is given by:
Here, E is the energy of the photon and W is the minimum energy required to remove an electron from the surface of the metal, W is defined as:
The Planck – Einstein relation states that the energy of a photon is equal to its frequency multiplied by the planck constant:
Recall that . Replacing (3) and (2) in (1):
Solving for :
This is green light
If a coin is dropped at a relatively low altitude, it's acceleration remains constant. However, if the coin is dropped at a very high altitude, air resistance will have a significant effect. The initial acceleration of the coin will be the greatest. As it falls down, air resistance will counteract the weight of the coin. So, the acceleration will decrease. Although the acceleration decreases, the coin still accelerates, that is why it falls faster. When the air resistance fully counters the weight of the coin, the acceleration will become zero and the coin will fall at a constant speed (terminal velocity). So, the answer should be, The acceleration decreases until it reaches 0. The closest answer is.
a. The acceleration decreases.
answer:
the electromagnetic force
explanation:
- the electromagnetic force of attraction between negative electrons and positive protons in the nucleus keeps electrons in the area surrounding the nucleus
- the electromagnetic force of repulsion between positive protons in the nucleus is overcome by the strong nuclear force between protons and neutrons
- credits: online source
Answer:
A
Explanation:
When you multiply a vector by a scalar the magnitude will change but the direction will not change.
The given statement "An astronaut's mass is the same on the International Space Station as it is on Earth" is true.
Answer: Option D
<u>Explanation:</u>
There is usually a slight difference between mass and the weight of an object. The difference is that the mass of any object is independent of its acceleration due to gravity or gravitational influence of the planet where it is present.
Similarly, the weight of any object will be influenced by the gravitational force of that planet as the weight is directly proportional to the acceleration due to gravity of that planet.
So, the other three options are false and those three options states that weight of an object on Earth is equal to the weight of that object on any other planet. This is not true. So, the fourth option related to the mass of an astronaut in and outside Earth is true as it is equal theoretically.