Which factor varies between the isotopes of an element?

A. proton number

B. electron number

C. neutron number

D. electrical charge

Along the frictionless path you have chosen, the main force (s) acting on the puck after receiving the kick is (are) :

6. A 4 kg object hangs below a 6 kg object by a string of negligible mass. If the 6 kg object is pulled upward by a force of 440 N, what is the tension in the string?

A passenger in a train accelerating smoothly away from a station observes that a child's yo-yo hanging by its string from a luggage rack makes a 10 degree angle from the vertical.

Flynn and his sister were rolling a ball back and forth on the floor. Flynn rolled the ball to his sister, but it stopped before it got to her. What caused the ball to stop rolling? A. Flynn pushed it too hard B. The air resistance on the ball C.

During the winter, what type of precipitation would most likely fall in New York, with temperatures averaging 32 F? rain sleet snow drizzle

A rocky space object of varying size

Three balls are kicked from the ground level at some angles above horizontal with different initial speeds. All three balls reached in their paths the samemaximum height.

A solar eclipse will occur Group of answer choices 1. at every full Moon. during every new Moon. 2. at full Moon only when the Moon is on the ecliptic. 3. at new Moon only when the Moon is on the ecliptic.

What happens when energy in the molecules of an ice cube when it begins to melt

ll of mass m is thrown vertically upward with an initial speed of v0. It experiences a force of air resistance given by F = - kv, where k is a positive constant. The positive direction for all vector quantities is upward.