Contrast the roles of dark matter and dark energy in the fate of the cosmos
What will be an ideal response?
At first, the discovery of much dark matter seemed to increase the role of gravity, giving us more than the critical density and closing the Big Bang. But dark energy acts against gravity, speeding up the expansion into at least a flat universe in the future.
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The lunar highlands are:
A) more rugged, heavily cratered, and older than the lunar mare. B) made of lighter colored, younger rocks than the mare. C) formed by plate tectonics, like the Earth's Himalayas. D) formed by volcanic eruptions, much like our Andes. E) brighter than the mare, since they are covered with reflective glass from the rays.
Describe each differentiated layers of Earth
What will be an ideal response?
The Sun is at the center of the Milky Way galaxy
a. True b. False Indicate whether the statement is true or false
A capacitor is connected to an AC power supply. In this circuit, the current
A) leads the voltage by 90°. B) is in phase with the voltage. C) lags the voltage by 45°. D) lags the voltage by 90°. E) leads the voltage by 45°.