The asteroid that killed the dinosaurs exploded because
A. it was made of explosive material
B. it was made out of U-235
C. it got very hot from the impact
D. It didn't explode; it knocked the Earth out of its normal orbit.
Answer: C. it got very hot from the impact
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Two rods of the same length and diameter are made from different materials. The rods are to connect two regions of different temperature so that energy will transfer through the rods by heat. They can be connected in series, as in figure a, or in parallel, as in figure b. In which case is the rate of energy transfer by heat larger?
What is the difference between speed, velocity, and instantaneous velocity? Give examples of each
What will be an ideal response?
What is parallax?
A. the apparent shift in position of an object caused by a change in the observer's position B. the shift in angular position of an object as the object actually moves in space C. the distance to an object, measured in parsecs D. the difference between the apparent and absolute magnitude
Galileo dropped two balls of different weights and found they accelerated equally to the ground below. Einstein imagined the same result for a side-by-side drop
A) without invoking gravity. B) in an accelerating vehicle. C) whether they were of the same mass or not. D) all of the above E) none of the above