The specific heat of aluminum is 0.90 J/g•°C and of iron is 0.45 J/g•°C. How much energy was absorbed by each 1-gram sample?​

As a pendulum bob swings back and forth several times, the maximum height it reaches becomes less and less. this is because more and more of the pendulum bob's energy is being transformed into a. heat energy b. kinetic energy c. potential energy d. kinetic energy and potential energy

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?

The ability to make things happen is also called a. heat b. force c. matter d. energy