16. Fig. 3.1 shows the speed/time graph for a journey travelled by a tractor. speed 6
m/s
Q
R
4-
2
Р
0
50
200
0
S
100
170
time/s
Fig. 3.1
(a) Use the graph to describe the motion of the tractor during each of the marked sections. [4]
OP

PQ
QR
RS

10 newton object is placed 3 meters from the fulcrum. at what distance on the other side would you need to place a 15 newton object to balance the lever? show your work!

Astone is thrown into a pond. what happens to the amplitude of the resulting waves as they get farther from the point where the stone hit the water? explain.

Air conditioners not only cool air, but dry it as well. suppose that a room in a home measures 5.0m×9.0m×2.4m . if the outdoor temperature is 30 ∘c and the vapor pressure of water in the air is 85 % of the vapor pressure of water at this temperature, what mass of water must be removed from the air each time the volume of air in the room is cycled through the air conditioner? the vapor pressure for water at 30 ∘c is 31.8 torr.