2 R
speed
P
Q
s
0
time
The diagram shows the speed / time graph for a train as it travels along a track.
For which part of the graph is the train's speed changing at the greatest rate?
(1 Point)
PQ
QR
o ООО
RS
ST

What will a positive and a negative charge do if they are separated from each other?

Uppose we consider the system of the three capacitors as a single "equivalent" capacitor. given the charges of the three individual capacitors calculated in the previous part, find the total charge qtot for this equivalent capacitor. express your answer in terms of v and c.

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.