An object is moring in a negative direction with a negative acceleration, for example an object dropped out a vindow. What does it mean that both velocity and acceleration are negative?
A)
The object is speeding up
8)
The object is slaving down
9
The object will eventually stop
The object must be moving downward.

As a car drives with its tires rolling freely without any slippage, the type of friction acting between the tires and the road is 100) a) static friction. b) kinetic friction. c) a combination of static and kinetic friction. d) neither static nor kinetic friction, but some other type of friction. e) it is impossible to tell what type of friction acts in this situation.

Abeam of electrons with of wavelength of 7.5 x 10-6 m is incident on a pair of narrow rectangular slits separated by 0.75 mm. the resulting interference pattern is projected onto a screen 10.0 m from the slits. what is the separation of the interference maxima in the resulting interference pattern?

What are similarities and differences between refraction, reflection, diffraction and absorption?