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Physics Quiz 29 (25 MCQs)

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1. A cyclist rides 300 m up a slope in 50 s. She then rides down the slope in 25 s. What is her average speed for the whole journey?
2. Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
3. After some rather exhausting counting (and a rather tall tale), a physics teacher determines that a very small sample of an object contains 8.25749 x 1017 protons and 5.26 x 1014 electrons; the charge on this object is _____ Coulombs.
4. A device can produce sound with a frequency range of 20 Hz-20 kHz(20 000 Hz). What is the most appropriate for the device?
5. If we have more oxygen in air what will happen?
6. What is the correct formula to find the resultant force?
7. At what temperature a body will not radiate any heat energy?
8. Two football players with mass 75 kg and 100 kg run directly toward each other with speeds of 6 m/s and 8 m/s respectively. If they grab each other as they collide, the combined speed of the two players just after the collision would be
9. Suitable impurities are added to a semiconductor depending on its use. This is done in order to
10. Which of the following is equivalent to half a meter?
11. How much work input is required to lower (not drop) a 120 pound weight from the top of a 3 foot table to the floor
12. Ohmic conductor among the following is _____
13. The overall force on an object after all the forces are added together is called the _____
14. Only one part of moon can be seen from earth because_____
15. Blisters are formed more rapidly by the steam of boiling water in comparision to boiling water itself because _____
16. Which will weigh the least?
17. Wood is an example of
18. What law describes how acceleration, mass and net force are related?
19. Determine the quantity and type of charge on an object that has 3.62 x 1012 more protons than electrons.
20. A weight-lifter raises a 2000 N weight through a vertical height of 2.0 m in 0.80 s.What useful power does he develop in doing this?
21. Which statement is correct about a bottle of water?
22. What happens to the force between two charged objects when you double the distance between them?
23. Capacitors which all are connected to the same source of potential.
24. Capacitors or other devices connected along a single path
25. Glass if optically denser than air. Which one is the closest approximate of the speed of light in glass?
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