Which event is an example of a contact force?

A.

a nail being attracted to a magnet

B.

a leaf falling from a tree

C.

an electric charge jumping from a sweater to a person

D.

a person pulling a sled

What is caused by extra estrongen in women

n a car lift used in a service station, compressed air exerts a force on a small piston that has a circular cross section of radius 5.00 cm. This pressure is transmitted by a liquid to a piston that has a radius of 15.

How does the Doppler effect explain the sound you hear when a race car comes toward and then passes a camera?

What are conducts and insulators?

Kelly is sledding on a snowy hill in the winter. The energy the sled has as it slides down the hill is a form of A. chemical energy. B. mechanical energy. C. potential energy. D. electrical energy.

Explain what each of the following scientists contribute to the atomic theory

A fully charged parallel-plate capacitor remains connected to a battery while a dielectric is slid between the plates. Do the following quantities increase, decrease, or stay the same? Select one or more: a. delta V increases b.

Energy is observed in two basic forms: potential and kinetic. Which of the following correctly matches these forms with a source of energy? a. the heat released from a living organism: potential energy b.

What should you do when operating a boat in large waves and high wind?

A planetary nebula forms when the outer layers are expelled from which type of star?