If a diffraction grating is heated (without damaging it) and therefore expands, what happens to the angular location of the first-order maximum?
A) It moves toward the centerline.
B) It moves away from the centerline.
C) It doesn't change.
A
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The oldest objects found so far in our solar system are Earth rocks that are 3.9 billion years old
Indicate whether the statement is true or false
A supersonic aircraft flies between observers A and B as shown. The resulting sonic boom will soon be heard by
1) only observer A. 2) only observer B. 3) both A and B. 4) neither A nor B. The intensity of the sonic boom depends on the 5) speed of the aircraft. 6) size of the aircraft. 7) distance from the aircraft. 8) all of the above. 9) none of the above.
Ohm's law tells us that the amount of current produced in a circuit is
1) directly proportional to voltage. 2) inversely proportional to resistance. 3) both of these which means that current in a conductor can be increased by 4) increasing the voltage across it. 5) reducing its resistance. 6) both of these D) none of the above
What causes synchronous rotation?
A) Most jovian moons were formed out of their planet's nebula with the same rotational period as their parent planet. B) Most jovian moons were formed out of their planet's nebula with the same orbital period. C) A massive planet exerts a tidal force on a moon that causes the moon to obtain the same rotational period as its parent planet. D) A massive planet exerts a tidal force on a moon that causes the moon to align itself such that its tidal bulges always point toward and away from the planet. E) orbital resonances with other moons