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A car waits at a red light for a few seconds, and then accelerates straight ahead to 54 km/h in 3.1 s and then cruises at a constant speed for 75 m. The road is straight. Find the total distance and time travelled.
A stream of doubly ionized particles (missing two electrons and therefore carrying a net charge of two elementary charges) moves at a velocity of 3.0 x 104 m/s perpendicular to a magnetic field of 9.0 x 10-2 T. What is the magnitude of the force acti..
How many times hotter than the Sun's surface is the surface of a star the same size, but that gives off twice the Sun's energy per second (that is, is twice as luminous)?
There are several ways you might think you could enter numbers in WebAssign, that would not be interpreted as numbers. N.B. There may be hints in RED!!! You cannot have commas in numbers. You cannot have a space in a number. You cannot substitute the..
Two point charges, +3.75 µC and -6.05 µC, are separated by 1.21 m. What is the electric potential midway between them
Two objects are falling through the air. One of them is a racquetball; the other one is an identical racquetball, but one filled with lead shot rather than being hollow. Explain in detail how their terminal velocities will compare.
A particle undergoes simple harmonic motion with an amplitude of 0.32 m. During one period, how far does the particle travel?
A wire is 0.79 m long and 0.77 mm2 in cross-sectional area. It carries a current of 4.1 A when a 2.0 V potential difference is applied between its ends
a listener at rest with respect to the air and the ground hears a signal of frequency f r from a source moving toward
What must the minimum muzzle velocity be for the shell to clear the top of the cliff?
A bat at rest sends out ultrasonic sound waves at 48 kHz and receives them returned from an object moving directly away from it at 27.5 m/s. Determine what is the received sound frequency
The wavelength of visible light varies from 380 nm to 750nm as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 695nm
A cylinder contains 1.85 mol of helium gas at 18.5°C. Assume that the helium behaves like an ideal gas. What is the average kinetic energy per molecule
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