Greenhouse gases in our atmosphere trap just enough heat to keep the Earth's oceans liquid
Indicate whether the statement is true or false
TRUE
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Planck's constant
A) sets an upper limit to the amount of energy that can be absorbed or emitted. B) sets a lower limit to the amount of energy that can be absorbed or emitted. C) relates mass to energy. D) determines the value of the gravitational constant.
How can Kirchhoff's Laws be used to deduce something about the nature of the light source?
What will be an ideal response?
A 60-kg swimmer dives from a 150-kg raft with a horizontal speed of 1.5 m/s
The raft is initially at rest. What is the speed of the raft immediately after the diver jumps?
How do we know what Earth's temperature was many years before thermometers existed?
A) From computer calculations that start from the conditions (the atmosphere and sea level, primarily) of earlier times and then calculate the resulting temperature. B) From laboratory experiments that reconstruct the conditions (the atmosphere and sea level, primarily) of earlier times and then measure the resulting temperature. C) From such indirect methods as tree rings (the thickness and density of a ring is dependent on the temperature at the time of growth) and annual layers of ice in ice cores. D) From historical information about the climate recorded by Vikings and other travelers during the ice ages. E) From computer calculations that work backward from the present time to calculate the temperature at earlier times.