Many classical Greek astronomers believed Earth could not move because they detected no parallax
Indicate whether the statement is true or false
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A car needs to generate 75.0 hp in order to maintain a constant velocity of 27.3 m/s on a flat road. What is the magnitude of the total resistive force acting on the car (due to friction, air resistance, etc.)? (1 hp = 746 W)
A) 2.05 × 103 N B) 2.75 N C) 1.03 × 103 N D) 2.87 × 103 N
Planck's quantum theory is compatible with the experimental data related to which of the following?
a. blackbody radiation b. the photoelectric effect c. line spectra emitted by hydrogen gas d. all of the above
Consider a situation where you exert a force F on a crate of mass m, moving it at a speed v a distance d across a floor in a time interval t. You carry a 20 N box 5 m horizontally across a room. The work you do is __________
Fill in the blank(s) with correct word
If the source moves, the wavelength of the sound in front of the direction of motion is smaller than the wavelength behind the direction of motion
Indicate whether the statement is true or false