Which one of the following substances is a liquid fuel used in rocket engines?

A. Codium nitrate

B. Ammonia

C. Potassium perchlorate

D. Liquid oxygen

Which is not an example of work being done? a. Pushing a backpack to class. b. Pulling a backpack to class. c. Carrying a backpack to class. d. Lifting a backpack from the floor to the table.

A block on an inclined plane experiences a force due to gravity of 300 N straight down. If the slope is inclined at 67.

Pouring water on yourself and drying naturally (vs. toweling off) cools you because O A. the thermal energy of the water is decreasing. O B. the water is colder than you are. O C. the water is using heat to undergo a phase change. O D.

A 1569 kg car moves with a velocity of 15 m/s. What is its kinetic energy? Joules

What homemade things could I use for wheels on a small balloon powered car?

StA A boat takes off from the dock at 2.5 m/s and speeds up at 4.2 m/s2 for 6.0 s. How far has the boat traveled? Round your answer to the nearest whole number.

In Part A, you determined that the heat added to the coffee is what you got. If it takes 4.2 J of energy to raise the temperature of 1.0 mL of coffee by 1.0∘C, then it should take twice as much energy to raise the temperature of 2.

The brightness of a star depends on what three factors?

What is most likely the relationship between Mendel's rules of genetics and Darwin's idea of biological evolution? Mendel's genetics states laws that are now part of the theory of biological evolution.

Why would it be a problem if your household appliances were connected in a series circuit