Which of the following is most useful to determine how much energy is being used by a circuit in a given amount of time?

a. power

b. current

c. voltage

d. resistance

What happens to the buoyant force on an object as it is lowered into water? Why?

steve took a train 30 miles north to seattle then he took a different train 25 miles east draw a vector diagram showing steves trip including the resultant vector be sure to label all vectors

After rubbing two glass spheres with a silk cloth, you give each rod a charge of + 6.0 x 10-6C. The spheres are 0.1m from each other.

715 J of heat are transferred from a 1.30 kg aluminum block to a 0.800 kg iron block. Find the temperature change for the iron.

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.

If centripetal force is directed toward the center why do you feel like you are thrown away from a center as a car goes around a curve?

You are given miles = 50 miles, time = 1 hour initial given velocity = 0 miles/hour (your standing still) and final velocity = 50 miles/hour. you travel a total of 100 miles. How long did it take you (time) ?

The centripetal force acting on a satellite in orbit A. acts as an unbalanced force on the satellite. B. changes the direction of the satellite. C. is a center-directed force. D. all of the above

Compare your answer to the previous question with your observations in conducting this experiment. Discuss whether energy was conserved in your experiment. Was friction negligible

What is a controlled experiment? none of the variables are changed all variables are kept constant two variables are changed at a time one variable is changed at a time