1. What causes velocity to change?

Consider a closed circuit with a 9-volt battery connected in series to a light bulb with a resistance of 3 ohms. What is the current flowing through the light bulb?

A small object has charge Q. Charge q is removed from it and placed on a second small object The two objects are placed I m apart. For the force that each object exerts on the other to be a maximum, what should q be? a) q 20 c) q Q/2 d) q / 4

If you are travelling in your Bugatti at 45 m/s (about 100 mi/hr) and step on the brakes, creating an acceleration of - 12.5 m/s^2. How far do you travel before stopping? How far would it be if you were only travelling 22.

The independent variable or the one that is intentionally manipulated is

Why have we learned a lot about star formation since the invention of detectors sensitive to infrared radiation?

Consider a helium balloon on a string tied to the seat of your stationary car. The windows are closed, so there is no air motion within the car. The car begins to accelerate forward. Which way will the balloon lean, forward or backward

The force of gravity acts upon meteors from the rocky asteroid belt between mars and Jupiter. Where is the force of gravity most likely to pull these meteors

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. Which of the following best describes how such a telephone is able to transmit and receive information? A.

Calculate the gravitational potential energy relative to the ground when an 82 kg person climbs to the top of a 2.0 m stepladder.

A rock is thrown from a cliff and hits the ground five seconds later at a distance of 50 m from the cliff how high was a cliff