A ray of light, which is traveling in air, is incident on a glass plate at a 45° angle. The angle of refraction in the glass
A)
is less than 45°.
B)
is greater than 45°.
C)
is equal to 45°.
D)
could be any of the above; it all depends on the index of refraction of glass.
A
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Basic Postulates: You are riding in a spaceship that has no windows, radios, or other means for you to observe or measure what is outside. You wish to determine if the ship is stopped or moving at constant velocity. How can you do this?
A. You can determine if the ship is moving by determining the apparent velocity of light in the spaceship. B. You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving. C. You can determine if the ship is moving by lying down and measuring your height. If you are shorter than usual, the ship is moving. D. You should give up because you have taken on an impossible task!
A charged capacitor is connected to an ideal inductor. At time t = 0, the charge on the capacitor is equal to 6.00 ?C. At time t = 2.00 ms the charge on the capacitor is zero for the first time
What is the amplitude of the current at that same instant? A) 2.38 mA B) 4.71 mA C) 0.780 mA D) 1.53 mA E) 1.19 mA
For a long ideal solenoid having a circular cross-section, the magnetic field strength within the solenoid is given by the equation B(t) = 5.0t T,
where t is time in seconds. If the induced electric field outside the solenoid is 1.1 V/m at a distance of 2.0 m from the axis of the solenoid, find the radius of the solenoid. A) 0.94 m B) 9.0 m C) 0.30 m D) 77 m
Daytime low temperatures generally occur:
What will be an ideal response?