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A child sits in a wagon with a pile of 0.403 kg rocks. If she canthrow each rock with a speed of 11.7 m/s relative to the ground, how many rocks must she throw perminute to maintain a constant average speed against a 5.04 N forceof friction?
Illustrate what is the magnitude of the net torque on the wheel due to these three forces for an axis perpendicular to the wheel and passing through its center?
A circular surface with a radius of 0.062 m is exposed to a uniform external electric field of magnitude 1.55 104 N/C, What is the angle between the direction of the electric field and the normal to the surface
questionin an x-ray machine electrons are accelerated and then fired so that they are incident on a metal target. which
Two traveling sinusoidal waves are described by the wave functions, What is the amplitude of the resultant wave, What is the frequency of the resultant wave
(a) Calculate the index of refraction of the polymer if the refracted angle is 26 degrees. (b) Calculate the critical angle of the polymer in air. (c) Calculate the speed of light in the polymer.
A 73.7-kg person puts on a life jacket, jumps into the water, andfloats. What is the density of the life jacket
A freezer has a coefficient of performance of 6.30. It is advertised as using 446 kWh/yr. how much energy does it use in a single day
A ceiling fan consists of a small cylindrical disk with 5 thin rods coming from the center. The disk has mass md = 3.4 kg and radius R = 0.26 m. What is the final angular speed of the fan
An airplane traveling at half the speed of sound emits a sound of frequency 5.31 kHz. (a) At what frequency does a stationary listener hear the sound as the plane approaches? (b) At what frequency does a stationary listener hear the sound after the p..
White light illuminates an oil film on water. Viewing it directly from above, What is the refractive index of the oil
The flywheel of an engine has a moment of inertia 2.20 {rm kg} cdot {rm m}^{2} about its rotation axis. What is its final kinetic energy.
question1alan leaves university of lethbridge at 800am to drive to au 650 km away. he leaves at an average speed of
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