As soon as a bowling ball rolls off the edge of a table its horizontal component of velocity
A) decreases.
B) remains constant.
C) increases.
Answer: B
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Which of these situations is possible?
1.Energy is transferred by heat to a system and the internal energy of the system decreases. 2.Energy is transferred by heat to a system and the internal energy of the system remains constant. 3.Energy is transferred by heat to a system and the internal energy of the system increases. 4.All of these are possible.
A series LR circuit consists of a battery, resistor, inductor and a switch. When the switch is closed the circuit has a time constant of 8.0 s. If the resistance and inductance of the circuit are both doubled, what is the resulting time constant?
A. 8.0 s
B. 16 s
C. 32 s
D. 4.0 s
E. 2.0 s
The mass of a supermassive black hole thought to power a typical bright active galactic nucleus is roughly ________
A) 1 billion solar masses B) 3 solar masses C) 10 solar masses D) 1 trillion solar masses
How can Betelgeuse be only half the Sun's surface temperature, yet about 10,000 times more luminous than the hotter Sun?
What will be an ideal response?