How should scalar symbols be written? A. in bold type B. in italic type C. with an arrow on top D. in bold type or with an arrow on top

Explain why a balloon expands when taken to a higher elevation if the temperature remains constant?

How could air that is saturated with water become over saturated without adding any water?

Walt ran 5 kilometers in 25 minutes, going eastward. What was his average velocity? 0.17 km/m east 0.2 km/m east 5 km/m east 25 km/m east

You walk 33 m to the north, then tirn 60 degrees to your right and walk another 45 m. How far are you from where you originally started?

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

A herringbone or tire track pattern on a radiograph is a result of

A 7150-kg railroad car travels alone on a level frictionless track with a constant speed of 24.5 m/s. A 3100-kg load, initially at rest, is dropped onto the car What will be the car's new speed?

How is friction related to conservation if mechanical energy?

Does the ear drum vibrates when struck by sound waves and directly sends a message to the brain that is then recognized as sound?

Think of an example that you could use to convice a friend that an object at rest has an "internal hold back property" that is different from a frictional force or the force of the earth's gravity.