A football player kicks with a mass of 0.42 kg. The average acceleration of the football was 14.8 m/s². How much force did the kicker supply to the football?

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

The star betelgeuse is about 600 light-years away. if it explodes tonight, a. we'll know because debris from the explosion will rain down on us from space.b. we'll know it immediately because it will be brighter than the full moon in the sky.c. we won't know about it until 600 years from now.d. none of the above.

What is the name of the perceived change in a sound wave’s frequency due to motion between the observer and the sound source?