Which elements do hydrogen fuel cells combine to produce electricity?

An astronaut throws a rock horizontally on the moon with a velocity of 7 m/s. Assuming no air resistance, what will be the final velocity of the object in the x direction if the moon is about 1/100th the mass ofEarth?

Consider a system of two particles: ball A with a mass m is moving to the right a speed 2v and ball B with a mass 3m is moving to the left at a speed v.

A panpipe is made of five pipes. The longest pipe is 25 centimeters long and the shortest is 5 centimeters long. Which of these pipe produces the highest-frequency sound and why?

An object with a mass of 7.5 g raises the level of water in a graduated cylinder from 25.1 ml to 30.1 ml. what is the density of the object?

Which records should you consult before determining if an animal is safe to ship

A racehorse can accelerate from a dead stop to 15 m/s in 9.0 seconds. What is the acceleration of the horse?

When potential energy is converted into kinetic energy the total amount of energy

honor physics The velocity of a 200 kg object is changed from 5 m/s to 25 m/s in 50 seconds by an applied constant force. a. What change in momentum does the force produced? by. What is the magnitude of the force?

Orangutans can move by brachiation, swinging like a pendulum beneath successive handholds. If an orangutan has arms that are 0.

What is the name given to the force of gravity acting on you?