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Physics Quiz 28 (25 MCQs)

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1. -capability of an electric field to permeate through a vacuum.
2. What is known as the moment of force?
3. If tight scissors have an efficiency of 50%, half of your work is wasted due to
4. How much wood do you need to a form a triangular garden frame if one side of the frame has a length of 11 ft, and the other two sides are 2 feet longer than the first side?
5. An aeroplane is flying horizontally with a velocity of 600 km/h and at a height of 1960 m. When it is vertically at a point A on the ground a bomb is released from it. The bomb strikes the ground at p
6. Impulse is the product of _____ and the time interval during which the force acts.
7. After a bowling ball has fallen for 1 second, approximately how fast is it going, vertically?
8. How to add vectors graphically?
9. A runway dog walks 0.64 km due N. He then runs due W to a hot dog stand. If the magnitude of the dog's total displacement vector is 0.91 km, what is the magnitude of the dog's displacement vector in the due west direction?
10. A coin was thrown vertically upwards and it rose to a length of 10 metres. What was the time taken by the body to reach the highest point?
11. What does q measure?
12. Einstein got the Nobel prize for?
13. At what point is the projectile's vertical velocity equal to zero?
14. What is 78.5 rounded to one significant figure?
15. What is the unit for electrostatic charge?
16. Out of the following, which is not emitted by radioactive substance?
17. An attractive force exists between which two particles?
18. A 931-g object is attached to a spring with spring constant of 587 N/m and is undergoing simple harmonic motion. What is the object's horizontal displacement if the spring force is 50 N?
19. A policeman traveling 19.5 m/s spots a speeder ahead, so he accelerates his vehicle at a steady rate of 1.81 m/s2 for 3.2 s, at which time he catches up with the speeder. What distance does the police car cover in that time?
20. $ V=\ VmSin\omega t$ is the wave equation for
21. If no external force acts on a system of bodies, the total linear momentum of the system of bodies remains constant. Which law states this?
22. A hacky sack is thrown up into the air with an initial velocity 3 m/s. What is the hang time of the hacky sack if it returns to the same point from which it was thrown?
23. In the expression $ \frac{A}{B \cdot C}$, A has 5 significant figures, B has 2 significant figures, and C has 3 significant figures. How many significant figures does the quotient have?
24. What will be the effect on gravitational acceleration if the earth suddenly stops its rotation?
25. What material partiallyopposes a capacitor's electric field but can increase capacitance and preventthe capacitor's plates from touching?
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