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you push a 20kg box on a wooden floor, downward to the right at an angle of 60degrees to the vertical, with a constant speed of .5m/s. The coefficient of the friction between the floor and the box is 0.7.
a. How hard did you push the box?
b. You pushed a distance of 50m. How much work did you do?
c. How much work did the other forces do?
d. What is work done by all the forces? Is the result consistent with energy principle?
A negatively charged ion moves due north with a speed of 1.2×106 m/s at the Earth's equator. What is the magnetic force exerted on this ion?
A circuit containing a 8 H inductor has an alternating current supplied to it. If Irms is 5.6 A and Vp is 25 V, find the frequency of the signal
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The diffusion rate for a solute is 4.0 × 10-11 kg/s in a solvent-filled channel that has a cross-sectional area of 0.50 cm2, What would be the diffusion rate m/t in a channel with a cross-sectional area of 0.30 cm2
A large capacitance of 1.80 mF is needed for a certain application, Calculate the volume of Teflon alone in the capacitor
A long wire lying along the x-axis carries a current of 1.60 A in the +x direction. There is the uniform magnetic field present, given by B=0.003i + 0.004j + 0.002k, where i, j, k are the unit vectors along cartesian coordinate axes') in units of Tes..
How fast should a meterstick travel to you in the direction parallel to the stick so that its length as measured by you is 70 cm.
Forces of 4 N and 6 N act on an object. What is the minimum value for the sum of these two forces
The flywheel of an automobile engine is a solid disk with a mass of 8.5 kg and a radius of 23 cm and is rotating at 3850 rpm. to what height would the flywheel be lifted
A wire 83.0 cm long lying along the x axis carries a current of 360.0 mA in the positive x direction, Find the magnitude of the force on the wire
A diffraction grating produces a first order maximum at an angle of 20.0Â°. What is the angle of the second order maximum
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