In the first law of thermodynamics, Q is the heat gained by the system, that is, Q is positive if the system gains heat
Indicate whether the statement is true or false
TRUE
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Buoyancy: Salt water is denser than fresh water. A ship floats in both fresh water and salt water. Compared to the fresh water, the volume of water displaced in the salt water is
A. more. B. less. C. the same. D. Cannot be determined because we do not know the volume of the ship.
If we allow for a simple runaway greenhouse effect, the inner boundary of the Sun's habitable zone would be
A) roughly halfway between the orbits of Venus and Mercury B) just outside the orbit of the planet Mercury C) roughly half way between the orbits of the Earth and Venus D) just inside the orbit of the Earth
In projectile motion, which of the following is not constant?
a. Vertical velocity b. Horizontal velocity c. Acceleration d. None of these
Three identical resistors are connected in parallel to a 12-V battery. What is the voltage of any one of the resistors?
A) 36 V B) 24 V C) 12 V D) 4 V E) zero