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

The substances that are necessary for producing of certain hormones and that store and transport vitamins

Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheel accelerates uniformly for 10 s and reaches the operating angular velocity of 96 rad/s. the wheel is run at that angular velocity for 40 s and then power is shut off. the wheel slows down uniformly at 1.5 rad/s2 until the wheel stops. in this situation, the time interval of deceleration is closest to:

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation 2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!