Angular magnification of a magnifying glass is largest when the image is at
A) the near point.
B) the focal point.
C) the pupil of the eye.
D) infinity.
E) the far point.
A
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What does this graph tell us about humans compared to other animals?
A) Humans have a brain that is unusually large for an animal of our size. B) Humans have the largest brains of any animal. C) Unlike the brains of other animals, human brains cannot be described by a straight line. D) Based on averages determined from other animals, human brains are precisely the size we'd expect for animals of our weight.
In mountain regions, food cooked in boiling water cooks slower than when cooked at sea level. If the temperature beneath the pot of boiling water is increased, the food will cook
A) faster. B) slower still. C) both of these D) neither of these
A proton and an antiproton each with total energy of 400 GeV collide head-on. What is the total energy (particles + energy) released?
a. zero b. 400 Gev c. 800 GeV d. 1 600 GeV e. 2 400 GeV
A baseball pitcher is employing a ballistic pendulum to determine the speed of his fastball. A lump of clay is suspended from a cord 2.0 m long
When the pitcher throws his fastball aimed directly at the clay, the ball suddenly becomes embedded in the clay and the two swing up to a maximum height of 0.080 m. If the mass of the baseball is 0.21 kg, find the speed of the pitched ball.