21 : If the distance between two objects, each of mass 'M', is tripled, theforce of attraction between the two objects is:
w) 1/2 the original forcex) 1/3 the original force
y) 1/9 the original force
z) unchanged
ANSWER: Y -- 1/9 THE ORIGINAL FORCE
22 : A 40 kilogram girl climbs a vertical distance of 5 meters in twenty seconds at a constant velocity. How much work has the girl done?
ANSWER: 2000 JOULES or 1960 JOULES
23 : A machine performs 8 Joules of work in 2 seconds. How much power is delivered by this machine?
ANSWER: 4 WATTS
23 : In physics, a radian per second is a unit of:
w) angular displacement
x) angular velocity
y) angular acceleration
z) angular momentum.
ANSWER: X -- ANGULAR VELOCITY
24 : If the resultant force acting on a body of constant mass is zero, the body's momentum is:
w) increasing
x) decreasing
y) always zero
z) constant
ANSWER: Z -- CONSTANTScience Bowl PHYSICS
25 : What is the name of the first American physicist to win two Nobel prizes?
ANSWER: (JOHN) BARDEEN
26 : Which of the following scientists is responsible for the exclusion principle which states that two objects may NOT occupy the same space at the same time? Was it:
w) Heisenberg
x) Bohr
y) Teller
z) Pauli
ANSWER: Z -- PAULI
27 : Who shared the Nobel Prize in Physics in 1909 with Guglielmo Marconi for his contribution to the development of wireless telegraphy?
ANSWER: (CARL FERDINAND) BRAUN
28 : Who first theoretically predicted the existence of the positron, a positively charged electron? He received the Nobel Prize in Physics in 1933.
ANSWER: (PAUL ADRIEN MAURICE) DIRAC
29 : Name the female physicist who received the Nobel Prize in 1963 for her discovery concerning the shell structure of the nucleus.
ANSWER: (MARIA GOEPPERT) MAYER
30 : The constant potential difference across a 2 ohm resistor is 20 volts. How many watts of power are dissipated by this resistor?
ANSWER: 200 WATTS
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