PHY 1001-What is the wavelength of an FM station

PHY 1001-What is the wavelength of an FM station

Subject: Physics    / General Physics
Question
Question 1 (1 point) What is the wavelength of an FM station broadcasting at 85 megahertz? The speed of
light is 300,000,000 m/s.
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Question 2 (1 point) A battery supplies 60 amps of current to a circuit at 12 volts. What is
the resistance in the circuit?
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Question 3 (1 point) A refrigerator uses 120 volts and 5.0 amps. How much power (in
watts) does the television use?
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Question 4 (1 point) You see a lightning flash strike the ground and 10 seconds later you
hear a loud blast of thunder. How far away (in feet) did the lightning
hit? The speed of sound in air is approximately 1100 ft/s.
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Question 5 (1 point) If the speed of a wave is 125 m/s and its frequency is 15 Hz, calculate
the wavelength (in meters).
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Question 6 (1 point) Calculate the energy (in joules) needed for 70 watts of power to be
used for 60 seconds.
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Question 7 (1 point) Calculate the charge (in Coulombs) needed for 5 amps to flow for 90
seconds Your Answer:
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Question 8 (1 point) 8 identical resistors are connected in series with a 12-volt battery.
Calculate the voltage across one resistor.
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Question 9 (1 point) An electric toaster operating on 120 volts draws a current of 8.0
amps. The resistance of the toaster is:
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Question 10 (1 point) What is the wavelength of an FM station broadcasting at 110
megahertz? The speed of light is 300,000,000 m/s.
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Question 11 (1 point) Calculate the resistance (in ohms) of a 140 watt lightbulb connected
to a 120-volt electrical outlet.
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Question 12 (1 point) Calculate the linear mass density (in kg/m) of a 500 gram wire that is
100 cm long.
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Question 13 (1 point) A small electric device has a resistance of 14 ohms when the current
in it is 3 amperes. Calculate the voltage required to produce this
current.
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Question 14 (1 point) Calculate the velocity of a car (in m/s) that starts from rest and
accelerates at 10 m/s 2 for 8 seconds.
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Question 15 (1 point) Calculate the centripetal acceleration of a 2 kg mass (in m/s 2) if it is
attached to a 0.5 m rope and revolves at a speed of 15 m/s?
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Question 16 (1 point) The mass of a car is 1,750 kg. If the train accelerates at 2.20 m/s 2,
what net force (in Newtons) acts on the train?
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Question 17 (1 point) Calculate the momentum of a 190 kg motorcycle traveling at 55 m/s.
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Question 18 (1 point) The kinetic energy of a motorcycle and driver is 70,000 J. If their total
mass is 450 kg, what is their velocity (in m/s)?
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Question 19 (1 point) In a one-dimensional elastic collision of two identical masses, the
masses exchange velocities.
Question 19 options:
1) TRUE.
2) FALSE.
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Question 20 (1 point) Which one of the following quantities is equal to the change in
momentum of an object during a collision?
Question 20 options:
1) impulse
2) net force
3) work
4) change in kinetic energy
5) maximum force
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Question 21 (1 point) A particle that has zero momentum must also have zero kinetic
energy.
Question 21 options:
1) TRUE.
2) FALSE.
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Question 22 (1 point) When objects stick together after colliding, the collision is completely
elastic.
Question 22 options: 1) TRUE.
2) FALSE.
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Question 23 (1 point) On a windy day, waves in a lake or the ocean are higher than their average height. What factor in
Bernoulli’s principle contributes to the increased height? Question 23 options:
Pressure builds up over the crests.
None of the above.
Air travels faster over the crests than the troughs.
Reduced pressure pulls water upward