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Physics Quiz 7 (60 MCQs)

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1. Listening to your favorite radio station involves which area of physics?
2. The name of the device we use to measure force is called:
3. If an object is placed 21 cm from a converging lens, the image formed is slightly smaller than the object. If the object is placed at a distance of 19 cm from the lens, the image formed is slightly larger than the object. The approximate focal length of the lens is:
4. Photons of energy 2.1 eV cause a photoelectric currenton the surface of caesium, which has a workfunction of 1.9 eV. How many times should the energyof the photon be increased in order to double themaximum kinetic energy of the photoelectrons?
5. What area of physics deals with the behavior ofsubatomic particles?
6. Which Branch of Physics is most important when studying how musical instruments work?
7. The equation for PE (gravitational potential energy) is:
8. Hooke's law states that the extension of a spring is proportional to .....
9. An object is removed from the ground and placed on a shelf. Which of its properties would you expect to change?
10. Calee runs at a uniform speed of 9.89 m/s over a distance of 1.4 km. With correct significant digits, how long did it take Calee to run this distance?
11. How far can a person run in 15 minutes if he or she runs at an average speed of 16 km/hr (in miles per hour)? (NOTE = 1 mile =1, 609 m)
12. If we double the speed of an object, what happens to the kinetic energy?
13. The meter is the unit of which physics concept?
14. Newton's third law states:for every action, there is an equal and opposite reaction. Explain why, then, a cannon does not go as far as backward as a cannonball goes forward.
15. What is the temperature in Celsius of a material that is 288.0K?
16. Miguel is lifting a 120 kg mass from the floor to a height of 2.50 m during gym class. If the mass is dropped, how fast is it moving when it hits the ground?
17. A cork floats a distance of 17.5 miles downriver after a period of 3 hours and 30 minutes. What was its average speed?
18. What is missing from the following equation? Change in thermal energy = specific heat capacity x mass x .....?
19. A small cart is rolling at constant velocity on a flat track. It fires a ball straight up into the air as it moves. After it is fired, what happens to the ball?
20. Infrared rays are important for
21. What quantity does the following equation calculate:density x gravitational field strength x depth
22. The force that acts in the opposite direction of motion when two surfaces come in contact.
23. Which Branch of Physics is most important when studying the motion of everyday objects like a car or bowling ball?
24. It is the exchange particle for the strong nuclear force:
25. A pot of 2400g of water at a temperature of 25$^ \circ$C is heated on a stove until the water boils (100$^ \circ$C). The specific heat of water is 4.18 J/(g$^ \circ$C).Determine the heat energy needed to heat the water in the pot to boiling.
26. A current of 2 Amps, at a p.d. of 12V flows for 60 seconds. How much energy is transferred?
27. Which variables affect kinetic energy?
28. Convert 5720 cm to km
29. The unit of weight is the
30. A projectile is launched from the ground at an angle of 30o. At what point in its trajectory does this projectile have the least speed?
31. What does The law of reflection state?
32. An increase in temperature that causes a change in the volume of a substance
33. When an object drops, what happens to the energy?
34. Energy that must be gained or lost for evaporation or condensation to occur
35. THE PROPERTY OF PERSISTENCE OF VISION IS USED IN
36. Which is an example of kinetic energy?
37. Water is a suitable cooling agent used in the cooling system of a car engine. This is because water
38. Which force is responsible for the decay of a proton to a neutron. State the boson.
39. Motion is of various types and the type of motion depends on how an object moves. For example, which type of motion can
40. Velocity is both ..... and .....
41. The gradient of a velocity time graph represents
42. The density of aluminum is 2.7 $gcm^3$. What is the mass of a cube of aluminium of sides 2.0 cm?
43. Boiling temperature point?
44. What is Heat? (in physics)
45. What scale do we use to measure temperature?
46. If someone is running-6m/s what is their speed?
47. Which force is responsible for the production of strange particles?
48. Which one is a Live Wire?
49. Which of the following is not an SI base quantity?
50. Huda jogs 3000 meters due north in 15 minutes and then jogs 4000 meters due south in 20 minutes.
51. In optics an object which has higher refractive index is called
52. What is the average speed of a cheetah that ran 55 meters in 5 minutes?
53. Calculate volume of aluminum with mass of 5400kg and a density of 2700kg/m3
54. Why is a spectrum of seven colours formed when sunlight passes through a prism?
55. According to the law of reflection the angle of incidence is
56. When travelling home from school on the AT train at a constant speed in a straight line, which statement is true
57. Acceleration is caused by a force acting on a mass.
58. The high pressure waves reflect as high pressure at the end of a .....
59. Find the cut-off wavelength for the photoelectriceffect in tungsten (work function for tungsten is 4.5 eV)
60. Its is a branch of physics that applies the tools and techniques of physics to the study of living things in life processes.
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