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71: Which of the following colors of visible light has the longest wavelength? Is it:
w) violet
x) green
y) yellow
z) red
ANSWER : Z -- REDScience Bowl PHYSICS
72: A 10 kilogram mass rests on a horizontal frictionless surface. A horizontal force of 5 Newtons is applied to the mass. After the force has been applied for 1 second, the velocity of the mass is:
w) 0 meters per second
x) 0.5 meters per second
y) 5 meters per second
z) 50 meters per second
ANSWER : X -- 0.5 METERS PER SECOND
73: A worker lifts a 10 kilogram block a vertical height of 2 meters. The work he does on the block is:
w) 5 Joules
x) 20 Joules
y) 49 Joules
z) 200 Joules
ANSWER : Z -- 200 JOULES
74: An impulse of 10 kilogram-meter per second acting on an object whose mass is 5 kilogram will cause a change in the objects velocity of:
w) 0.5 meters per second
x) 2 meters per second
y) 10 meters per second
z) 50 meters per second
ANSWER : X -- 2 METERS PER SECOND
75: The time needed for a net force of 10 newtons to change the velocity of a 5 kilograms mass by 3 meters/second is:
w) 1.5 seconds
x) 6 seconds
y) 16.7 seconds
z) 150 seconds
ANSWER : W -- 1.5 SECONDS Science Bowl PHYSICS
76: The value of G, the universal gravitational constant, was measured experimentally by:
w) Newton
x) Cavendish
y) Copernicus
z) Kepler
ANSWER : X – CAVENDISH
77: Two steel balls are at a distance S from one another. As the mass of ONE of the balls is doubled, the gravitational force of attraction between them is:
w) quartered
x) halved
y) doubled
z) quadrupled
ANSWER : Y – DOUBLED
78: If the distance between the earth and moon were halved, the force of the attraction between them would be:
w) one fourth as great
x) one half as great
y) twice as great
z) four times as great
ANSWER : Z -- FOUR TIMES AS GREAT
79: As a 10 kilogram mass on the end of a spring passes through its equilibrium position, the kinetic energy of the mass is 20 joules. The speed of the mass is:
w) 2.0 meters per second
x) 4.0 meters per second
y) 5.0 meters per second
z) 6.3 meters per second
ANSWER : W -- 2.0 METERS PER SECOND Science Bowl PHYSICS
80: As a longitudinal wave moves through a medium, the particles of the medium:
w) vibrate in a path parallel to the path of the wave
x) vibrate in a path perpendicular to the path of the wave
y) follow the wave along its entire path
z) do not move
ANSWER : W -- VIBRATE IN A PATH PARALLEL TO THE PATH OF THE WAVE
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