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

How would it be possible for an object to be traveling with a constant speed and still accelerating?

A red ball with a velocity of 3.0 m/s collides head-on with a yellow ball of equal mass moving with a velocity of?2.0 m/s. what is the velocity of the two balls after the elastic collision?

What profession is most likely to make use of amperes and candelas a. nurse b. marine biolaginst c. eletrical engeneer d. althletic coach

A student rides his skateboard for 10 minutes and travels 1.2 miles. If the skateboarder wants to go 5 miles, how much time should it take if he maintains his speed?

A cartoon plane with four engines can accelerate at 8.9 meters per second squared

How many hops does a kangoroo do in 1 day

What are the average velocity and average acceleration of the tip of a 2.4 cm long hour hand of a clock?

What is the number one and most important rule to remember in soccer?

Why are convection currents; why are they hotter and colder parts of earth

A swimmer is swimming to the left with a speed of 1.0 m/s when she starts to speed up with constant acceleration. The swimmer reaches a final speed of 2.5 m/s over a distance of 5.0 m. How long did the swimmer take to speed up to 2.