Sally and Sam are in a spaceship that comes to within 16,000 km of the asteroid Ceres. Determine the force Sally experiences, in
1 answer:
You might be interested in
Answer:
4.09 kgm/s
Explanation:
Concept tested: Second Newton's law of motion
So what does the second Newton's law of motion state?
- According to the second Newton's law of motion, the resultant force and the rate of change of momentum are directly proportional.
- That is;
, where, mVf is the final momentum and mVo is the initial momentum.
In this case;
- Force = 12.8 N
- Initial momentum, mVo = 1.3 kgm/s
- Time, t = 0.218 seconds
Therefore; replacing the values of the variables in the formula;
we get;
Solving for final momentum;
= 4.09 kgm/s
Therefore, the final momentum of the box is 4.09 kgm/s
Answer:
True, True, False, False, False, False.
Explanation:
The refraction index of a material is given by the formula n=c/v, where c is the speed of light in vacuum and v the speed of light in the material. If a ray of light crosses a boundary between two transparent materials and the medium the ray enters has a larger index of refraction it means that in this new medium the speed of light is smaller than on the other one, and then its wavelength is also reduced since f must remain the same (and ), otherwise there is a discontinuity on number of vibrations per second, which cannot happen. So we know that:
1) The wavelength of the light decreases as it enters into the medium with the greater index of refraction. True.
2) The frequency of the light remains constant as it transitions between materials. True.
3) The speed of the light remains constant as it transitions between materials. False.
4) The speed of the light increases as it enters the medium with the greater index of refraction. False.
5) The frequency of the light decreases as it enters into the medium with the greater index of refraction. False.
6) The wavelength of the light remains constant as it transitions between materials. False.