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A 1.2-lb block B slides without friction inside a slot cut in arm OA which rotates in a vertical plane at a constant rate, theta = 2 rad/s. At the instant when theta = 30 degrees, r = 2 ft and the force exerted on the block by the arm is zero.
Determine, at this instant,
(a) the relative velocity of the block with respect to the arm,
(b) the relative acceleration of the block with respect to the arm.
Water at a pressure of3.8atm at street level flows into an office building at a speed of0.70m/s through a pipe4.4cm in diameter. Calculate the flow velocity and the pressure in such a pipe on the top floor
The supersonic aircraft Concorde has a length of 61.3 meters when sitting on the ground on a typical day when the temperature is 12. Celsuius . The Concorde is primarily made of aluminum. In flight at twice the speed of sound, friction with the ai..
The sound intensity of a whisper is 1.0x10^-10 W/m^2 at one meter distance from the source. At what distance does the intensity level drop by an additional 1dB
Find the point between Venus and the Sun at which an object can be located therefore that the net gravitational force exerted on it by these two objects is zero
You give a 2.35 kg book an initial shove at 2.50 m/s, Find the coefficient of friction between book and floor
A voltage V is applied to a thin parallel plate capacitor of plate separation d filed with a cloud of charge of constant density ρ. Find the potential inside the capacitor with respect to the positive plate
a river flows with a uniform velocity v. a person in a motorboat travels 1.15km upstream at which time she passes a log
string a is stretched between two clamps separated by distance l. string b with the same linear density and under the
The temperature of the surface of the sun is 6000K and its radius is 696,000Km. How much energy is the sun radiating into space per second
Conservation of energy tells us that energy cannot be created or destroyed. Clearly energy is required for radioactivity to occur. a. Where exactly is this energy coming from? b. How could the age of this fragment be determined?
two solenoids are nested coaxially such that their magnetic fields point in opposite directions. treat the solenoids as
Space vehicles traveling through Earth's radiation beltscan intercept a significant number of electrons. Find the resulting surface charge density
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