A pulley system can

a. change the direction of a force.

b. multiply the force.

c. increase the amount of work done.

d. both a and b

e. both b and c

Karen has a hunch her partner is cheating on her. To confirm her suspicions, Karen has checked private text messages and emails, as well as listened in on private phone calls from the other room.

On most periodic tables a single atomic mass is listed instead of the mass numbers for all the stable isotopes. How is this mass related to the different isotopes?

When children draw human figures by sketching a circle with dangly lines for legs the children are demonstrating which developmental stage in art? A. Drawing B. Schematic C. pre schematic D. circular

The basic barometer can be used to measure the height of a building. If the barometric readings at the top and at the bottom of a building are 675 and 695 mm Hg, respectively, determine the height of the building.

20% of injury crashes in 2009 involve the reports of distracted driving. True or false

What's the definition of: • cellular respiration • photosynthesis

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you