Answer:
1. B. The person and the Earth
2. This is because the energy gained by the person equals the energy lost by the earth,
Explanation:
1.
B. The person and the Earth
This is because the person and the earth both represent a system. A system consists of more than one item. A system consists of two or more items interacting with each other.
2. This is because, the energy of an isolated system is conserved according to the second law of thermodynamics which states that in an isolated system, energy can neither be created nor destroyed. So, there is an exchange of energy between the person and the Earth. So, the energy gained by the person at the new height equals the energy lost by the earth. And thus, the total energy of the system remains constant.
The force of attraction between two objects is proportional to the mass of the objects and inversely proportional to the square of teh distance between them. In this casem if the distance is decreased to 1/10 of the original, then teh force of attraction increases by 100 times (10^2).
<h2>T
he average speed for the entire trip is 47.5 m/s .</h2>
It is given that for different time span car have different speed and also the person spend 
in eating lunch and buying gas.
We know , average speed is total distance covered by total time taken .
Therefore , average speed , 
Hence, this is the required solution.
Learn More :
Average speed
https://brainly.in/question/12701198
Answer:
How hot or cold you feel depends on the rate at which your body is losing heat to the environment
Water on your skin acts pretty much like sweat. Water is more thermally conductive than air; therefore, the skin loses its heat to it much faster than it would to air.
Also, because water evaporates, it carries heat away from the skin and this increases the rate at which the skin loses its heat. The faster heat loss from the skin to water is what makes us feel cold when we are wet. But of course, the temperature of water has to be lower than the skin for this to occur, which is usually the case.
Answer:
Yes.
Explanation:
Sound waves travel through metal 17 times faster than air.
