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A 35 kg uniform ladder is leaned against a building. The 5 m tall ladder makes an angle of 60 degrees with the ground. The ladder encounters a coefficient of static friction from the ground of 0.3 and a coefficient of static friction with the wall of 0.42. A painter must climb two-thirds of the ladder to reach a blank spot on the wall. What is the maximum mass that the painter can have before the ladder begins to slip?
A 1.80 MHz sound wave travels through a pregnant woman's abdomen and is reflected from the fetal heart wall of her unborn baby. The heart wall is moving toward sound receiver as the heart beats.
A scaffold of mass 57 kg and length 6.5 m is supported in a horizontal position by a vertical cable at each end. What is the tension in the cable closer to the painter
An electromagnetic wave produced by a dipole antenna is traveling in free space and has an rms electric field amplitude of 17 N/C. find the rms amplitude of the magnetic field
How does the mass and electric charge of a proton compare with the mass and charge of an electron?
A small body of mass 0.13 kg is undergoing simple harmonic motion of amplitude 9.0 cm and period 0.10 s. What is the maximum value of the force acting on it? If the oscillations are produced by a spring, what is the spring constant?
If you had been tasked to remove the water from New Orleans after Hurricane Katrina would you select a radial flow, mixed flow or axial flow pump for this purpose? Explain it briefly.
Amtrak's 20th-Century Limited is en route from Chicago to New York at 120km/h, How far was the train from the cow when the engineer first applied the brakes
You push a crate across a rough floor against a constat force of friction. You first push with a force of 35N, the acceleration of the box is 0.80m/s^2; Find the mass of the box
(a) compute the absolute pressure at the bottom of a freshwater lake at a point whose depth is 25.5 m. assume the density of the water is 1.00 x10^3 kg/m3 and the air above is at the pressure of 101.3 kPa.
Batteries are recharged by connecting them to a power supply (i.e., another battery) of greater emf in such a way that the current flows into the positive terminal of the battery being recharged
Assume that, when Hiawatha aims vertically, his arrow reaches a maximum height of 20 m. Use this fact to find the initial speed u with which Hiawatha can launch the arrow vertically.
The volume flow rate in an artery supplying the brain is 3.29E-6 m3/s. determine the average blood speed
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