Half the stars in the Milky Way Galaxy are members of a binary system, many of which are likely to support life on planets
a. True
b. False
Indicate whether the statement is true or false
False
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Consider two planets in space that gravitationally attract each other. If the masses of both planets are doubled, and the distance between them doesn't change, then the force between them is
A) one-quarter. B) half as much. C) twice as much. D) four times as much. E) none of the above
A 12.0-N object is oscillating in simple harmonic motion at the end of an ideal vertical spring
Its vertical position y as a function of time t is given by y(t) = 4.50 cm cos[(19.5 s-1)t - ?/8]. (a) What is the spring constant of the spring? (b) What is the maximum acceleration of the object? (c) What is the maximum speed that the object reaches? (d) How long does it take the object to go from its highest point to its lowest point?
At 96°F the saturation density of air is 0.04 kg/m3 . If the weather report says the relative humidity is 90% when the temperature is 96°F, the humidity is __________
Fill in the blank(s) with correct word
Since evaporation of water from reservoirs is an important water loss mechanism, especially in dry climates, it is important to reduce losses. What measures could you suggest for reducing such evaporation? Are any of these actually feasible?
What will be an ideal response?