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A car delivers 30 hp to its wheels when moving at a constant speed of 22 m/s. Calculate what is the total resistance (Drag and Friction) on the car? (1hp= 746 W)
What is the length of a box in which the minimum energy of an electron is 1.1 x 10^-18J
as a fish jumps vertically out of the water assume that only two significant forces act on it an upward force f exerted
A (20.1+/- 0.2)ohm resistor is connected in parallel with a (39.9+/- 0.4)ohm resistor. The resistors are connected to a (2.90+/-0.03)V battery, Calculate the total current in the circuit
LASIK eye surgery uses pulses of laser light to shave off tissue from the cornea, reshaping it. What is the power of one laser pulse
A sodium surface is illuminated by a light of wavelength 300nm. The work function for sodium metal is 2.46 eV. Discover (a) the kinetic energy of the ejected photoelectron, (b) the cut off wavelength for sodium. c) the maximum speed of the photoelect..
A man drags a 75.0-kg crate across the floor at a constant velocity by pulling on a strap attached to the bottom of the crate. Find the magnitude of the tension in the strap
In the Bohr model of the hydrogen atom, an electron moves in a circular path around a proton. The speed of the electron is approximately 2.51 106 m/s. Find the centripetal acceleration of the electron
A harmonic wave travels in a wire with amplitude 2.54 mm,wavelength 1.34 m, and frequency 487 Hz. What is the speed with which the wave travels
darius the dare devil plans to launch his rocket car at the top a ramp inclined at 20.0 degrees to the horizontal over
A star in a distant galaxy is located at a distance of 20 kpc from the center of that galaxy. What is the total mass of the dark matter in this galaxy
An adventurous child of mass m releases herself at the top of a water-slide with an initial speed of 6.00 m/s. How fast is she moving when she reaches the pool
Equipotential surface A has a potential of 5950 V, while equipotential surface B has a potential of 8400 V. How much work is done by the outside force in moving the particle from A to B
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