A cannonball is launched horizontally off a 75 m high castle wall with a speed of 35 m/s. What is the range of the cannonball

In science and physics what is the standard unit of measure for speed?

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

Explain the difference in reactivity of the elements based on their electron configurations.