A hydrometer is used to measure
a. the time for an object to sink.
b. water (hydro).
c. the volume of a quantity of water.
d. liquid density.
d
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What do we mean by length contraction in relativity?
A) It is the idea that if you measure the size of an object moving relative to you, you will find that it is shorter in every direction than it would be at rest. That is, length, width, and height are all shorter for an object when it is moving by you. B) It is the idea that moving objects look smaller than nonmoving objects, but their sizes have not really changed. C) It is the idea that if you measure the size of an object moving relative to you, you will find that in the direction of motion it is shorter than it would be at rest, while its size in other directions is unchanged. D) It is the idea that if you travel very fast, you'll notice yourself getting shorter.
When one note is above another note by an octave, the frequency of the higher pitch note is double that of the lower pitch note. The word octave may make you think that there are 8 steps from the lower note to the one an octave above. But wait! How many steps are there on a piano from middle C to the next C above? Each key is a step. If each next key is a step, how many are there? Middle C is a
white (W) key and the next note above is a black (B) key. Starting at middle C on the piano the sequence of key we go through to get to high C, is BWBWWBWBWBWW, the last key being high C. Count ‘em. That's 12 steps. If the multiplying factor of the frequency for the next step is the same for each step, what is that multiplying frequency? All you need is given in this problem statement. a. 101/12 b. 121/8 c. 21/8 d. 21/12
The Greenwich meridian is also known as the
a) reference circle. b) zero, or prime, meridian. c) East-West major parallel. d) zenith meridian.
Peak load is the most expensive to supply
What will be an ideal response?