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 lying down and measuring your height. If you are shorter than usual, the ship is moving.
B) You should give up because you have taken on an impossible task!
C) You can determine if the ship is moving by checking your precision time piece. If it's running slow, the ship is moving.
D) You can determine if the ship is moving by determining the apparent velocity of light in the spaceship.
B
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At what distance from a long straight wire carrying a current of 5.0 A is the magnitude of the magnetic field due to the wire equal to the strength of the Earth's magnetic field of about 5.0 × 10-5 T?
A) 1.0 cm B) 2.0 cm C) 3.0 cm D) 4.0 cm E) 5.0 cm
A kilometer contains 1 million meters
Indicate whether the statement is true or false
For what reasons do we consider the planets of the solar system to be of two fundamentally different types?
What will be an ideal response?
Why do O stars exhibit weak hydrogen absorption lines?
A) At these high temperatures, nearly all the hydrogen is ionized, and is therefore unable to interact with light. B) O stars are too cool to excite hydrogen atoms to the first energy level from which they can then absorb visible wavelengths of light. C) O stars contain very little hydrogen.