Which energy transformation takes place when a firecracker explodes?

nuclear to kinetic and chemical

• mechanical to electromagnetic and electrical

• chemical to thermal and electromagnetic

What can your body mass index tell you

A spring has a spring constant of 30000 N/m. How far must it be stretched (in meters) for its potential energy to be 47 J?

Most substances dissolve A. at a constant rate regardless of heat transfer. B. more quickly as heat is removed from them. C. at the same rate as all other substances. D. more quickly when heat is added to them.

In what month are shadows the shortest in our area?

On a roller coaster, describe the kinetic and potential energy of the car at the top of the first hill, the bottom of the first drop, and later in the ride.

Two children pulling the rope with the same force in opposite direction is that an unbalanced force or a balanced force

During sublimation particles in a solid room deodorizer move directly into the air as a gas how does the movement of the deodorizer particles change? the particles ___.

A 50-g ball rolls across the table at 2 m/s. A 100-g ball rolls across the same table at 1 m/s. Which ball has more momentum?

The cross section area of a hole is 725cm^2. Given that the area of a circle is A=3.14r^2, find the radius of the hole.

How long does it take the moon to go from full-moon phase to new-moon phase