A rock of mass m is twirled on a string in a horizontal plane. The work done by the tension in the string on the rock is:

a. + (positive)

b. - (negative)

c. 0

A circuit is a path along which electric current flows how would changing the battery in a circuit from 9 volts to 1.5 volts most likely affect the circuit

What is the process where dna can change in many ways?

Suppose you balance a 2.4 kg ball on the tip of your finger, which has an area of 1.4 cm squared? Find the pressure on your finger.

How does the central nervous system function similarly to the center to sell seeing you need of a compute

Robert is accelerating a cart at the rate of 2.2 meters/second2. If the mass in the cart is doubled, and the net force is also doubled, what is the final acceleration? A. The acceleration is halved. B. The acceleration remains the same. C.

Show that the Newton has the units of mass times acceleration.

Light travels at 150000000km from the sun to earth in 8 minutes. What speed is this in Km/s

Electricity problem (coulomb's law)

An observer (O) spots a plane (P) taking off from a local airport and flying at a 29° angle horizontal to her line of sight and located directly above a tower (T). The observer also notices a bird (B) circling directly above her.

In order for convection to occur, you must have