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The coefficients of static and kinetic friction between a 524crate and the warehouse floor are 0.665 and 0.320, respectively. A worker gradually increases his horizontal push against this crate until it just begins to move and from then on maintains that same maximum push. What is the acceleration of the crate after it has begun to move? Start with a free-body diagram of the crate.
A Carnot engine operates between temperatures of 747 and 324 K. Calculate what the efficiency would be if (a) the temperature of the hot reservoir were raised by 42.5 K or (b) if the temperature of the cold reservoir were lowered by 42.5 K. (Give ..
A tuning fork vibrates at concert A, fA = 440. Hz. The A string of a violin is sounded together with this tuning fork, Find the period of the string's vibration
Most asteroids are oblong in shape. Approximate an asteroid as being made up of two identical spheres of mass M and radius R that are just touching each other, in a figure eight
A ship, carrying fresh water to a desert island in the Caribbean, has a horizontal cross-sectional area of 2790m2 at the waterline. How much water was delivered
A string passes over a frictionless pulley and connects a 250 g block to 2.00 kg block. The inclines are frictionless. Assuming you release both masses from rest, how much time would it take the 250g to travel 2200cm next to the ramp.
A 190-?F capacitor and a 80m H inductor are in series with a 105 ? resistor. What is the impedance at the resonant frequency
A hypodermic needle consists of the plunger of circular cross-section that slides inside a hollow cylindrical syringe. When the plunger is pushed, the contents of syringe are forced through a hollow needle.
Four moles of an ideal gas undergo a reversible isothermal expansion from volume V1 to volume V2 = 5V1 at temperature T = 400K. Find the entropy change of the gas
A string 3 meters long has a mass of 2 grams. one end of the string is attached to a wall, what is the speed of a transverse wave in this string
a lantern slides down a driveway with an incline of 37 deg. If the coefficient of kinetic friction is .20. What is the acceleration of the lantern down the drive way
A 1.050 kg air-track glider is attached to each end of the track by two coil springs. Find the effective spring constant of the system
To monitor the breathing of a hospital patient, a thin belt is girded around the patient's chest. find the average induced emf in the coil during this time interval
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