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A scaffold of mass 61 kg and length 6.5 m is supported in a horizontal position by a vertical cable at each end. A window washer of mass 79 kg stands at a point 1.2 m from one end.
A volleyball is spiked so that its incoming velocity of +4.0m/s is changed to an outgoing velocity of -21 m/s. What impluse does the player apply to the ball
A square coil of wire with a single turn is placed perpendicular in a uniform 1.0T magnetic field. Each side has a length of 0.5m. The current through the coil is 20A. Determine the magnitude and direction of the magnetic force on each of the four si..
74 L of an ideal monatomic gas is at an absolute pressure of 3 atm when the temperature is 25 C. How many moles of gas are there
Monochromatic light of wavelength 500 nm is incident normally on a diffraction grating. how many TOTAL number of maxima can be seen
a what angles does a particles velocity have to make with the magnetic field direction for the particle to be subjected
The intake in the figure has cross-sectional area of 0.72 m2 and water flow at 0.49 m/s. What is the pressure difference between inlet and outlet
The rms speed of the molecules in 1.7g of hydrogen gas is 1700 m/s. What is the thermal energy of the gas
A model rocket is launched straight upward with the initial speed of 70m/s. It accelerates with a constant upward acceleration of 3 m/s2 until its engines stop at an altitude of 180 m.
as a helicopter carrying a crate takes off its vertical position as well as the crates is given as yt at3 where a is a
Two wires are identical, except that one is silver (resistivity = 1.59×10-8 W·m) and the other is platinum (resistivity = 1.06×10-7 W·m). The silver wire has resistance of 1.56 mW. What is the resistance of the platinum wire?
A sealed tank containing seawater to a height of 11.1m also contains air above the water at a gauge pressure of 2.85atm. How fast is the water moving
how much work was done by her force acting on the car
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