A catapult fires an 800-kg rock with an initial velocity of 100 m/s at a 40° angle to the ground. The magnitude of the horizontal impulse the catapult receives from the rock is
a. 5.1 × 10^4 N s.
b. 6.1 × 10^4 N s.
c. 8.0 × 10^4 N s.
d. 5.0 × 10^5 N s.
e. 6.0 × 10^5 N s.
b
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Starting with AC-227, assume the following sequence of decays occur: (1st) ? decay; then (2nd) ?- decay; and finally (3rd) alpha decay. Determine the correct isotopic product after each process has occurred sequentially
What will be an ideal response?
When you look at a single-slit diffraction pattern produced on a screen by light of a single wavelength, you see a bright central maximum and a number of maxima on either side, their intensity decreasing with distance from the central maximum. If the wavelength of the light is increased,
a. the pattern shrinks in size (central maximum less wide; other maxima in closer to it). b. the pattern increases in size (central maximum wider; other maxima farther from it). c. it does not affect the size of the pattern. d. the width of the central maximum increases, but the other maxima do not change in position or width. e. the width of the central maximum decreases, but the other maxima do not change in position or width.
All of the following statements are true. Which one explains the reason why there is not a solar eclipse at every new Moon?
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A block and a beaker of water are placed side-by-side on a scale (case A). The block is then placed into the beaker of water, where it floats (case B). How do the two scale readings compare?
1.Scale A reads more than scale B. 2.Scale A reads the same as scale B. 3.Scale A reads less than scale B. 4.Not enough information.