Which of the following has mass?
a. force
b. space
c. matter
d. light

Crowbar of 5 metre is used to lift an object of 800 metre if the effort arm is 200cm calculate the force applied

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system