Question

What is an example of kinetic energy?
1: a bird flying
2: a chair cushion that is warmed by sunlight
3: a toaster that turns on when plugged in
4: a blast produced by a nuclear bomb
Answer
Which of the following is a measure of a substance's or object's kinetic energy?
1: density
2: heat
3: conduction
4: temperature
Answer
What conditions must be met for conduction to occur between two substances?
1: The substances must be at the same temperature.
2: The substances must make direct contact with each other.
3: The substances must both consist of molecules moving at the same speed.
4: The substances must both be liquids.
Answered by GPT 3.5
1: a bird flying

Kinetic energy refers to the energy possessed by an object due to its motion. In this case, the bird is exerting energy to move through the air, so it exhibits kinetic energy.
Answered by GPT 3.5
4: temperature

Temperature is a measure of the average kinetic energy of the particles in a substance or object. It provides information about the motion and energy of the particles at the microscopic level. Therefore, temperature is a measure of kinetic energy.
Answered by GPT 3.5
2: The substances must make direct contact with each other.

For conduction to occur between two substances, they must be in direct contact with each other. Energy transfer by conduction happens when there is a temperature difference between the two substances, allowing the transfer of kinetic energy from the higher energy particles (hotter substance) to the lower energy particles (colder substance) through direct contact. The other conditions mentioned in options 1, 3, and 4 are not necessary for conduction to occur.