Physics, 29.09.2019 03:00 loulou6166
Which of these statements best explains why the size of the refracting telescope lens is kept small at the cost of reducing its capacity to gather radiations from space?
•big telescopes are more portable.
•big lenses gather harmful radiations from space.
•big lenses do not focus light properly to produce clear images.
•big telescopes are not reliable enough to be used for research.
Answers: 2
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If a balloon is taken outside on a very cold day, what will occur?
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Two forces produce equal torques on a door about the door hinge. the first force is applied at the midpoint of the door; the second force is applied at the doorknob. both forces are applied perpendicular to the door. which force has a greater magnitude?
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Physics, 22.06.2019 17:20
In a system with only a single force acting upon a body, what is the relationship between the change in kinetic energy and the work done by the force? answers: work is equal to the change in kinetic energy.work depends on the square of the change in potential energy.work is equal to the negative of the change in kinetic energy.work is equal to the square of the change in kinetic energy
Answers: 2
Which of these statements best explains why the size of the refracting telescope lens is kept small...
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