Multiple Choice

An object in motion will cause which of the following?

Select all that apply.

friction

decrease in heat flow

increase in heat flow

creation of energy

Which is the one factor that adds to the greenhouse effect? 1. a decrease in the amount of dust in the atmosphere 2. a decrease in the amount of water on Earth's surface 3. an increase in gasses that absorb heat 4.

The distance between slits on a diffraction grating is 0.60 mm, and one of the angles of diffraction is 0.30°. The light forms a second-order bright band. How large is the path difference? 1047 nm 1571 nm 3142 nm 6284 nm

What accounts for the two precipitation peaks in mbandaka?

The process by which a solid changes to a liquid is

A swallow sitting on a fence sings a song for anyone who will listen what type of energy?

What is the weight of a 65 kg astronaut on mars?

When lava cools, what type of Rock forms?

A uniformly charged conducting sphere of 1.1 m diameter has a surface charge density of 6.2 µC/m2. (a) Find the net charge on the sphere. (b) What is the total electric flux leaving the surface of the sphere?

A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 12 A, while that of the vacuum cleaner is 5.7 A. Determine the power consumed by (a) the blow-dryer and (b) the vacuum cleaner.

4. A 40 kg child and a 30 kg child want to balance themselves on a 4 meter, 50 kilogramn see-saw. Where should the fulcrum be placed?