6 m/s (rest)
4 m/s
Case 1: The bullet goes
through the block, so that the
bullet has a final speed of 4
m/s after it emerges from the
block.
2 kg
4 kg
4 kg
2 kg
Bullet's Initial
Momentum
+
Block's Initial
Momentum
Bullet's Final
Momentum
+
Block's Final
Momentum
Vi
If
V21
++
LE+
L
+
TI
+
=
+
+
+
1+ ++
+ +
+
++
+++
m2
m
m2
What type of collision is this?
Evidence:

Diego kicks a soccer ball from the end line. his fellow students time and mark the soccer ball as it moves down the field. the graph represents the ball's progress. based on the graph, during what time is the velocity constant and positive?

Do you think you could give me the answers to #29?

Athin electrical heater is inserted between a long circular rod and a concentric tube with inner and outer radii of 20 and 40 mm. the rod (a) has a thermal conductivity of ka = 0.15 w/(m*k), while the tube (b) has a thermal conductivity of kb = 0.8 w/(m*k) and its outer surface is subjected to convection with a fluid of temperature t= -15°c and heat transfer coefficient 60 w/(m2 *k). the thermal contact resistance between the cylinder surfaces and the heater is negligible. (a) determine the electrical power per unit length of the cylinders (w/m) that is required to maintain the outer surface of cylinder b at 15°c. (b) what is the temperature at the center of cylinder a?