The person to introduce the idea of an atom was

A: John Dalton

B: Aristotle

C: Democritus

D: Lavosier

Analyze the formula W = mg to explain how an objects weight can change even when its mass remains constant.

The ratio of output force is the what of a machine

A single loop of wire with an area of 0.0860m^2 is in a uniform magnetic field that has an initial value of 3.80 T, is perpendicular to the plane of the loop, and is decreasing at a constant rate of 0.140 T/s.

Two different balls are rolled (without slipping) toward a common finish line. Ball 1 has an angular speed of?1=23.2 rad/s, and ball 2 has an angular speed of?2=14.8 rad/s. The first ball, which has a radius of 0.

How many electrons are in the third energy level of a calcium atom

Label 1a lies on the rim of a large crater, and 1b lies on the rim of a smaller one. Which crater must have formed first?

Which hybridization schemes allows the central atom to form more than four bonds?

A straight wire in a magnetic field experiences a force of 0.017 N when the current in the wire is 1.1 A. The current in the wire is changed, and the wire experiences a force of 0.077 N as a result. What is the new current

A girl pushes a cart with a force of 10 N. if the cart has a mass of 5 kg, what is its acceleration?

How long will it take take light moving at 300,000 km/s to reach us from the sun? The sun is 15,000,000 km from earth.