Which factor varies between the isotopes of an element?

A. proton number

B. electron number

C. neutron number

D. electrical charge

A sled of mass 50 kg is pulled along snow-covered, flat ground. The static friction coefficient is 0.30, and the sliding friction coefficient is 0.10 ... - - -. a) What does the sled weigh?. b) What force will be needed to start the sled moving?.

How could Tesla or anybody else light up a light just by holding it

Which is an action that can cause an object to move or change its state of motion

A proton is accelerated through a potential difference of 250V. It then enters a uniform magnetic field and moves in a circular path of radius 10.0cm.

Two nuclear reactors provide 3200 mw of power. if the transmission system loses 5.1% of the energy produced, how much power from these two reactors would customers receive?

What is a lever used for?

What did the romans build as a step toward environment management

Accelerations are produced by equal forces or unequal forces?

A wave travels through a medium. As the wave passes, the particles of the medium vibrate in a direction perpendicular to the direction of the wave's motion. The wave is a. longitudinal. c. electromagnetic. b. a pulse. d. transverse.

Two carts undergo an inelastic collision where they stick together. Cart A has an initial velocity v0, and the second cart B is initially at rest.