A 6.5-g iron meteor hits Earth at a speed of 295 m/s. If its kinetic energy is entirely converted to the thermal energy of the meteor, by how much will its temperature rise? The specific heat of iron is 113 cal/kg ? C°, and 1 cal = 4.186 J
A) 92.0 C°
B) 57,100 C°
C) 0.147 C°
D) 384 C°
A
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In the process of crystallization, the remaining magma becomes _______.
What will be an ideal response?
Warm air rises and cool air sinks. So, when an air parcel rises it becomes
A) cooler. B) warmer. C) more stable. D) less stable.
When a 125-kg piece of equipment is hung from a steel wire of diameter 6.00 mm, it stretches the wire by 4.00 mm. If instead the wire had a diameter of 3.00 mm, but all else were the same, by what distance would the same equipment stretch the wire?
A) 1.00 mm B) 2.00 mm C) 16.0 mm D) 8.00 mm E) 4.00 mm
Alex throws a 0.25-kg rubber ball down onto the floor. The ball's speed just before impact is 4.5 m/s, and just after is 2.9 m/s. What is the change in the magnitude of the ball's momentum?
a. 0.39 kg/m/s b. 1.9 kg/m/s c. 1.1 kg/m/s d. 0.73 kg/m/s e. 7.4 kg/m/s