As magma cools, the first minerals to crystallize are those with a _______.
What will be an ideal response?
low silica content
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Gravity lensing lets us map the distribution of both visible and dark matter
Indicate whether the statement is true or false
A board that is 20.0 cm wide, 5.00 cm thick, and 3.00 m long has a density 400 kg/m3. The board is floating partially submerged in water. What minimum mass would need to be set on the board to completely submerge the board?
A) 18.0 kg B) 12.0 kg C) 30.0 kg D) 48.0 kg E) 42.0 kg
About how many 100-W light bulbs would you have to light up to use energy at the rate of one horsepower?
a. one or two b. seven or eight c. the question doesn't make sense—hp and W are unrelated d. dozens e. none of the above
Explain how a photon is generated in the core of the Sun and how it is transported out from the Sun
What will be an ideal response?