3. Answer the following questions about the car whose motion is graphed below: D
40
30
20
d (m)
10 A
0
-10
-20
-30
B
0 20
40
60
80
a.
b.
c.
t(s)
When was the car 20 m west of the origin?
where was the car at 50 s?
The car suddenly reversed direction. When and where did that occur?

Awater-filled u-tube manometer is used to measure the pressure inside a tank that contains air. the water level in the u-tube on the side that connects to the tank is 5 ft above the base of the tank. the water level in the other side of the u-tube (which is open to the atmosphere) is 2 ft above the base. determine the pressure within the tank.

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance