Define 1 standard kg

Twin sisters Annie and Hannah are fighting over their favourite toy. Annie pulls with a force of 25N to the left. Hannah pulls with a force of 30N to the right. What is the net force on the toy?

Lisa made the electromagnet shown. What can Lisa do to increase the strength of the electromagnet? She can use a nail with weaker magnetic properties. She can change the direction of the nail. She can move the wire loops closer together.

A 2.10 X 10^3 kg car starts from rest at the top of a 5.0 mlong driveway that is sloped at 20 degrees with the horizontal. Ifan average friction force of 4.0 X 10^3 N impedes the motion, findthe speed of the car at the bottom of the driveway.

Explain what happens to the pitch of a cell phone ring when the amplitude of a sound wave increases. Justify your reasoning using complete sentences and key vocabular

What is time? With or without explanation

Is burning a nonrenewable natural gas a chemical change

The magnitudes of the vertical and horizontal components of a vector are 11 and 17 centimeters respectively. Find the magnitude of the vector and the angle from the horizontal axis.

A rectangular coil with sides 0.10 m by 0.25 m has 500 turns of wire. It is rotated about its long axis in a magnetic field of 0.58 T directed perpendicular to the rotation axis.

Stars set about how many minutes earlier each day? A. 8 B. 6 C. 4 D. 2

Whose atomic theory explains how atoms emit and absorb light