Land/water contrasts keep:
What will be an ideal response?
air temperature at coastal locations more constant than at interior locations
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A 75-watt lightbulb
A) creates a total of 75 joules of radiant energy during the entire lifetime of the bulb. B) consumes 75 joules of electric energy during every second. C) creates 75 joules of thermal energy during every second. D) consumes a total of 75 joules of electric energy during the entire lifetime of the bulb. E) creates 75 joules of radiant energy during every second.
The fact that light can be polarized shows that light is
a. polar. b. monochromatic. c. an electromagnetic wave. d. a transverse wave.
A circular coil (radius = 0.40 m) has 160 turns and is in a uniform magnetic field. When the orientation of the coil is varied through all possible positions, the maximum torque on the coil by magnetic forces is 0.16 N / m when the current in the coil is 4.0 mA. What is the magnitude of the magnetic field?
a. 0.37 T b. 1.6 T c. 0.50 T d. 1.2 T e. 2.5 T
What is the focal length of a contact lens that will allow a person with a near point of 125 cm to read a physics book held 25.0 cm from his eyes?
A) -100 cm B) -31.3 cm C) 10.2 cm D) 20.8 cm E) 31.3 cm