Three cars, car X, car Y, and car Z, begin accelerating from rest at the same time. Car X is more massive than car Y, which is more massive than car Z. The net accelerating force exerted on each car is identical
After 10 seconds, which car has the most amount of momentum? A) They all have the same amount of momentum.
B) Car X
C) Car Y
D) Car Z
A
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Displacement: If, in the figure, you start from the Bakery, travel to the Cafe, and then to the Art Gallery(a) what distance you have traveled?(b) what is your displacement?
What will be an ideal response?
This figure shows the Cepheid period-luminosity relation. What is the approximate luminosity of a Cepheid star that varies in brightness with a period of 10 days?
A) about 1000 times the luminosity of the Sun B) about 3000 times the luminosity of the Sun C) about 10,000 times the luminosity of the Sun D) about 30,000 times the luminosity of the Sun
A 2.0-kg block of aluminum at 50°C is dropped into 5.0 kg of water at 20°C and the temperature is allowed to stabilize. What is the total change in entropy during this process, assuming no heat is exchanged with the environment?
The specific heat of aluminum is 910 J/(kg ? K) and the specific heat of water is 4190 J/(kg ? K). A) 8.2 J/K B) 10 J/K C) 3.3 × 10-2 J/K D) 3.8 × 10-3 J/K E) 2.4 × 10-3 J/K
The formation of the supercontinent of Pangaea
A) resulted from the collision of all major land masses. B) produced widespread mountain building in the Himalayas. C) resulted in extensive volcanic activity and flood basalts. D) all of these