What do a broken rode and a volcano eruption have in common

Which of the following processes alwaysresults in an increase in the energy of a system? A) The system loses heat and does work on the surroundings. B) The system gains heat and does work on the surroundings.

A gas occupies 25L at 20 Celsius. What volume will the gas occupy a 35 celsius?

Make a the subject of the formula s=ut + 1/2at^2

Crystallization is a separation technique used to produce rock candy from a sugar solution. true or false

How does exercise affect your heart rate?

You short-circuit a 9 volt battery by connecting a short wire from one end of the battery to the other end. if the current in the short circuit is measured to be 18 amperes, what is the internal resistance of the battery?

A student is trying to calculate the density of a ball. She already knows the mass, but she needs to determine the volume as well. Which of the following formulas can be used to calculate the volume of the ball?

Is there such a thing as real time weather radar? why not?

Luke and Carrie are driving down a straight section of the interstate at 70 mph in Luke's new convertible. Carrie is drinking a soda in the passenger seat.

A force produces power p by doing work w in a time t. what power will be produced by a force that does six times as much work in half as much time?