Which diagram(s) represent(s) a latitude at which the Sun sometimes passes directly overhead?
What will be an ideal response?
Answer: d
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A monatomic ideal gas is cooled to one-half its original temperature during an isometric process. The final pressure of the gas
A) does not change. B) decreases to half its original value. C) increases to more than twice its original value. D) increases to twice its original value.
A car by itself is capable of a certain maximum acceleration. When it tows a car of the same mass, its maximum acceleration is
A) half. B) one-third. C) one-fourth. D) the same. E) none of these
A straight 10-cm wire bent at its midpoint so as to form an angle of 90° carries a current of 10 A. It lies in the xy plane in a region where the magnetic field is in the positive z direction and has a constant magnitude of 3.0 mT. What is the magnitude of the magnetic force on this wire?
a. 3.2 mN b. 2.1 mN c. 5.3 mN d. 4.2 mN e. 6.0 mN
Based on what we see in panoramic images, why do you think Moon is likely NOT to have an atmosphere?
A. Only in the absence of an atmosphere would the moon be able to reflect light from the Sun, thereby making it visible from Earth. B. If the Moon had an atmosphere, the light from the Sun would heat the atoms in the atmosphere and the atmosphere would start glowing. C. If the Moon had an atmosphere, then humans wouldn't have been able to land on its surface. D. If the Moon had an atmosphere, then Earth couldn't have an atmosphere since the two atmospheres would interact with each other. E. If the Moon had an atmosphere, it would scatter sunlight in all directions and the lunar sky would look bright.