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A 4.3 kg rock is initially at rest at the top of a cliff. Assume that the rock falls into the sea at the foot of the cliff and that its kinetic energy is transferred entirely to the water. The specific heat of water is 4186 J/kg·? C and the acceleration of gravity is 9.81 m/s2 . How high is the cliff if the temperature of 1 kg of water is raised 0.17?C? Answer in units of m.
Consider a violin string with a vibrating length of 30 cm. If the speed of a wave on this string is 250 m/s, what is the tension in the string? Hint: You will have to estimate the diameter of the string. Assume the density is the same as that of s..
A 0.43 Tesla magnetic field is perpendicular to a circular loop of wire with 52 turns, what is the magnitude of the induced emf in Volts
An object is 23.2 cm from the surface of a refiective spherical Christmas-tree ornament 5.11 cm in radius. What is the apparent position of the image
A 500- kg ice boat moves on runners on essentially frictionless ice. A steady wind blows, What was the force due to the wind
A 1.00 V potential difference is maintained across a 9.0 resistor for a period of 14.0 s, What total charge passes through the wire in this time interval
A 64.0-kg survivor of a cruise line disaster rests atop a block of Styrofoam insulation, using it as a raft. What total mass of survivors can the raft support
Two railroad cars, each of mass 7300 kg and traveling at 73 km/h, collide head on and come to rest. How much mechanical energy is lost in this collision
A sphere of radius 10.0 cm floats in equilibrium partially submerged in water with its lowest point 5.00 cm below the water's surface. What is the buoyant force acting on the sphere
An electric vehicle starts from rest and accelerates at a rate a1 in a straight line until reaches a speed of v. How far does the vehicle travel from start to stop
The tractor beam exerts a constant force of 4.0 104 N on the shuttlecraft. Both spacecraft are initially at rest. Explain how far does the starship move as it pulls the shuttlecraft aboard?
At the moment of release, a baseball player has a horizontal velocity component of 39 meters per second, At what angle was the ball released
Two identical uniform bricks of length 26 m are stacked over the edge of a horizontal surface. What maximum overhang is possible for the two bricks (without tipping)
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