Which of the following is TRUE about moderate intensity exercise? A) An activity that gets you exercising so hard that you can only say a few words

B) An exercise intense enough to trigger lactic acid formation

C) An activity that gets you exercising and you can talk and sing easily

D) An activity that gets you exercising hard, but you are still able to talk with ease.

Atank is filled with an ideal gas at 400 k and pressure of 1.00 atm . part a the tank is heated until the pressure of the gas in the tank doubles. what is the temperature of the gas?

You have been hired to design a spring-launched roller coaster thatwill carry two passengers per car. the car goes up a 10-m highhill, then descends 15m to the track's lowest point. you'vedetermined that the spring can be compressed a maximum o 2.0m andthat a loaded car will have a maximum mass of 400kg. for safetyreasons, the spring constant should be 10% larger than the minimumneeded for the car to just make it over the top. a) what spring constant (k) should you specify ? b) what is the maximum speed of a 350 kg car if the spring iscompressed the full amount.

How are elastic and inelastic collisions different? give two or more ways. your answer should have at least 2 sentences.