An astronaut on another planet drops a 1-kg rock from rest. The astronaut notices that the rock falls 2 meters straight down in one second. On this planet, how much does the rock weigh?
A) 1 N
B) 4 N
C) 5 N
D) 10 N
Answer: B
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A long straight wire lies on a horizontal table and carries an ever-increasing current toward the north. Two coils of wire lie flat on the table, one on either side of the wire
When viewed from above, the direction of the induced current in these coils is A) clockwise in both coils. B) counterclockwise in both coils. C) clockwise in the east coil and counterclockwise in the west coil. D) counterclockwise in the east coil and clockwise in the west coil.
If an electron has a wavelength of 0.123 nm, what is its kinetic energy, in electron-volts? This energy is not in the relativistic region
(melectron = 9.11 × 10-31 kg, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s) A) 19.8 eV B) 60.2 eV C) 80.4 eV D) 99.5 eV E) 124 eV
The _______________ effect changes the observed wavelength of an emitted photon if the source is moving toward or away from the observer
Fill in the blank(s) with correct word
In a compound microscope the final image is virtual
Indicate whether the statement is true or false