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A 68.0 patient is suspended in a raised hospital bed (angle is 50 degrees). The wire is attached to a brace on the patient's neck and pulls parallel to the bed, and the coefficients of kinetic and static friction between the patient and the bed are 0.500 and 0.800, respectively. What is the maximum mass can be without the patient sliding up the bed?
Flying due east, the plane flies with the rotation of the Earth, while flying due west, it flies against the rotation. Will the flight times be the same? Different? Why?
A father racing his son has three-fifths the kinetic energy of the son, who has half the mass of the father. What is the original speed of the son
A 140 kg piano is being lifted at a steady speed from ground level straight up to an apartment 16.0 m above the ground. The crane that is doing the lifting produces a steady power of 400W. Explain how much time does it take to lift the piano?
A projectile is launched at an angle of 34^{\circ} above the horizontal. The projectile has a mass of 1.50 kg and is given an initial speed of 20.0 m/s. What is the initial kinetic energy of the projectile
The speed of sound in air at room temperature is 339 m/s. What is the frequency of a sound wave in air with wavelength 1.0 m
THe Voyager one has a 20-W radio transmitter and is expected to transmit to 2025 when it is 25 billion km from the earth. WHat's the Diameter of a dish antenna
A hubcap comes off a car that is traveling 100m/s . If it stops rolling after traveling 25 m, How many revolutions did it turn through before stopping
Two blocks of mass m and 75 kg are connected via a light cord over a massless, frictionless pulley as shown in the attached figure. If the 75 kg block starts 2.0 m above the floor and takes 3.0 s to reach the floor when released from rest, what..
Compute the quantum length (thermal de Broglie wavelength) in nanome-ters and the chemical potential in electron volts of 4He gas at room temperature and pressure
A 1-m-tall barrel is closed on top except for a thin pipe extending 5 m up from the top. What is the pressure on the bottom when water is added to fill the pipe to its top
A soap film formed in a loop of wire is, because of its weight, not exactly uniform in thickness, but wedge-shaped in cross section. By how much does the film differ in thickness over the distance
A 0.50 kg block rests on the icy surface of a frozen pond, which you can assume to be frictionless. what is the minimum uncertainty in the block's speed
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