The 4.50 cm long second hand on a watch rotates smoothly.

1. What is its angular speed?

2. What is the speed of the tip of the hand?

A person opens a 2 - liter bottle of cola at a picnic. If the cap is left off the bottle, the cola will become 'flat' or lose its carbonation.

How did the operation of factories change with the invention of electric generators? a. They were able to operate 7 days a week. c. They were able to operate in the Winter. b. They were able to operate in the Summer. d.

What was so significant about dalton discoveries

Why do microwave ovens heat food, but tend not to heat the dish the food is on? A. Only certain molecules, such as water, can absorb microwaves. B. The dish is positioned lower than the food. C.

How does the octet rule influence Lewis dot structures?

How does an electromagnetic wave propagate itself? a. A changing magnetic field induces an electric field perpendicular to the magnetic field. b. A changing electric field induces a magnetic field perpendicular to the electric field. c.

Which of the following is an example of convection? A. hot air rising and cooler air falling B. a hot object transferring heat to a cooler one C. a hot oven warming the air around it D. the rays of the Sun warming the earth

A 50,000 kg locomotive is traveling at 10 m/s when its engine and brakes both fail. How far will the locomotive roll before it comes to a stop? Assume the track is level.

A rectangular loop of wire with sides 0.262 and 0.401 m lies in a plane perpendicular to a constant magnetic field (see part a of the drawing). The magnetic field has a magnitude of 0.

In the system you're inspecting the damper motor isn't working, You decide to see if the damper-postion sensor us sending the proper signal to the which then signals the damper motor. A. heating coil B. duckwork c. energy source D. controller