How many minutes each day should a middle school age student be involved in physical activity?

What is the escape velocity from a red giant with a mass of 1msun and a radius of 150 rsun?

A 1kw electric heater is switched on for ten minutes. how much heat does it produce

Think critically: the different molecules that make up the air in a room have, on average, the same kinetic energy. how does the speed of the different air molecules depend on their masses? your answer

What is the power output of a pump which can raise 60 kg of water to a height of 10m every minute

How are local winds and global winds diffrent

You pull a simple pendulum of length 0.225m to the side through an angle of 3.50∘ and release it. Part A How much time does it take the pendulum bob to reach its highest speed? Take free fall acceleration to be 9.80 m/s^2.

What is the velocity of a wave having a frequency of 25 Hz and a wavelength of 10m

What is the force on a 1-kg ball that is falling freely due to the pull of gravity

Which would react chemically by forming an ionic bond? A. 2 chlorine atoms with 7 valence electrons each B. 1 neon atom with 8 valence electrons and 1 lithium atom with 1 valence electron C.

Which of these are considered an oxidizing mutagenic agent? x-rays benzopyrene gamma rays