When energy is produced in a reaction it

A. is newly created energy

B. is from the energy in the reactants

C. increases the total amount of energy in the universe

What does a machine change to make work easier? Check all that apply. the amount of work done the amount of force applied the time needed to do the work the direction of a force the distance over which a force is applied

What distance will a car cover accelerating from 12 m/s to 26 m/s in 14 sec?

Explain why chemical equation for photosynthesis shows conversation of mass.

What would provide specific information about the materials in the equipment used in a certain experiment

An iron nail, if thrown into the sea, will sink. But, an entire ship made of iron will float on the water. Give reasons.

Whats an example of projectile motion

The fact that the sun rises and sets at different times during the day depending on the time of year is an example of a data trend. True or False

What sample of matter is a single substance

What is a hydraulic machine and what is its purpose? Explain how a simple hydraulic machine performs work.

Is the muzzle velocity a scalar or vector quantity?