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A gold prospector finds a solid rock that is composed solely ofquartz and gold. The mass and volume of the rock are, respectively,15.0 kg and 1.89 × 10-3m3. The density of gold is 19 300kg/m3, and the density of quartz is 2660kg/m3. Find the mass of the gold in the rock.
question1jims dog sparky runs 45.0 northeast to a tree then 70.0 west to a second tree and finally 25.0 south to a
A 287kg box is pulled at a constant speed by the little engine. The box moves a distance of 2.4 m across the horizontal surface. (µk=.20), How much energy is transferred by the engine
the driver of a car slams on her brakes to avoid collidingwith a deer crossing the highway. what happens to the car's kineticenergy as it comes to rest
A layer of synthetic diamond is grown on a quartz substrate inside a vacuum chamber. What is the thickness t of the thin film of diamond
Whats the coefficient of the kinetic friction of the tire. What is the acceleration of the car.
a liquid of unknown specific heat at temperature 20c was mixed with water at 80c in a container.final temperature was
Light Bulbs in Series and in Parallel. Two light bulbs have resistances of 500 ? and 1000 ?. The two light bulbs are connected in series across a 110 V line. (a) Find the current through the 500 ? bulb. A Find the current through the 1000 ? bulb. ..
An AC generator has 90 rectangular loops on its armature. Each loopis 15 cm long and 6 cm wide. The armature rotates at 1200 rpm about an axis parallel to the long side. If the loop rotates in a uniform magnetic field of 0.6 T, which is perpendicu..
A toaster uses a heating wire. When the toaster is turned on at 20 degree C, the initial current is 1.54 A. A few seconds later, the toaster warms up and the current has a value of 1.23 A. The average temperature coefficient of resistivity for thi..
A 5.22-kg object is attached to the bottom of a vertical spring and set vibrating. the maximum speed of the object is 15.3cm/s and the period is 645ms. find (a) the forse constant of the spring, (b) the amplitude of the motion, and (c) the frequency ..
An incredibly large slingshot is stretched 1.0 meters to launch a 128.0-gram projectile with a speed sufficient to escape from the Earth (11.2 km/s). What is the spring constant of the device if all the potential energy is converted to kinetic ener..
A 55 kg swimmer is standing on a stationary 180 kg floating raft. Find the recoil velocity that the raft would have
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