During the photoelectric effect experiment, a photon is emitted with 5.73 x10-20 J of kinetic energy. If the work function of th
1 answer:
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Answer:
1. The change in temperature of the material.
2. The length of the material.
3. The type of material.
Explanation:
The term linear expansion is defined as the increase in length of any conductor when there is a change in temperature. The new length of any wire or rod is given by :
is the initial length of the rod
is the coefficient of linear expansion
is the change in temperature
It is clear that the linear expansion of a material depends on :
1. The change in temperature of the material.
2. The length of the material.
3. The type of material.
So, all options are correct.
Answer:
The running horizontal speed should be larger than 1.29 m/s.
Explanation:
In order for the swimmer to just miss the bone-breaking ledge, her horizontal speed must be
in which we need to know how long we she be diving through the air. To determine that, recall the formula for the distance made by an object with acceleration (in this case it is the gravitational acceleration) with no initial (vertical) velocity:
from which it follows that (for non-negative t)
This result can be used in the initial inequality:
The diving lady better gets a speed larger than 1.29 m/s to avoid landing on the ledge.