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Physics Quiz 19 (25 MCQs)

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1. The speed of sound in the atmosphere
2. A toy has been dropped off by a kid on the 19th floor of his family's condominium unit. The unit is 40 m high. Disregarding air resistance, how long will the toy reach the ground?
3. A hacky sack is thrown up into the air with an initial velocity 3 m/s. What maximum height does the hacky sack reach?
4. Magnetism at the centre of a bar magnet is
5. Which law states, "the effect produced by a moving source of waves in which there is an apparent upward shift in frequency for observers towards whom the source is approaching and an apparent downward
6. Radio telescopes are better than optical telescopes because
7. What is the equivalent of 45 W in kilowatts?
8. Find the displacement a hiker walks if he travels 9.0 km north, and then turns around and walks 3.0 km south?
9. The pressure (in Pa) exerted by a force (F = 100 N) when applied over an area (A = 4 m2) is
10. The statement which correctly represents Ohm's law
11. Which quantity is measured in newtons?
12. Two or more elements chemically joined together and are represented by a chemical formula are known as _____
13. Identify the following quantities as scalar or vector:the mass of an object, the number of leaves on a tree and wind velocity.
14. What is wavelength?
15. What is the equation for frequency?
16. When did we first detect gravitational waves?
17. Accelerations can be Positive or negative. This positive and negative represents the _____
18. Which of the following unit will be used for the large distance?
19. In a standing wave the distance between a node and adjacent antinode is_____
20. A difference between Newton's law of gravity and Coulomb's law is that only one of these _____
21. A spring, which obeys Hooke's law, has an unstretched length of 10 cm. A load of 20N is suspended from the spring. The new length of the spring is 36 cm. What is the spring constant k of the spring?
22. According to Einstein, why do objects accelerate around massive bodies?
23. The form of matter are_____
24. What is torque measured in?
25. Moment of inertia is
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