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a) How many kilocalories are generated when the brakes are utilized to bring a 910 kg car to rest from a speed of 101 km/h?
b) How long does it take a 768 W coffee pot to bring to a boil 0.57 L of water initially at 8.0°C? Suppose that the part of the pot which is heated with the water is made of 358 g of aluminum, and that no water boils away.
A 1650 kg cannon, which firesa 75.0 kg shell with a speedof 544 m/s relative to themuzzle, is set at an elevation angle of 39° above the horizontal. The cannon is mounted onfrictionless rails, so that it recoils freely. What is the speed of the sh..
An electron going east with speed ve = 0.4c collides with a proton going north with speed vp = 0.3c. This collision will create a photon. Find the direction of the photon
a hot air balloon rises from the ground with a velocity of 2.0 msyhat. a champagne bottle is opened to celebrate
A 47.0-g golf ball is driven from the tee with an initial speed of 50.0 m/s and rises to a height of 25.6 m. Neglect air resistance and determine the kinetic energy of the ball at its highest point
a 2.5-kg particle oscillates on a spring with spring constant 85 nm. at time t 1.0s the particle is at maximum
The efficiency of a Carnot engine is 29%. The engine absorbs 815 J of energy per cycle by heat from a hot reservoir at 502 K. Determine the energy expelled per cycle
The position of a 250g object is given (in meters) by x=5.0t^3 -8.0t^2 -44t , where t is in seconds. Determine the net rate of work done on this object
suppose that the magnetic field of the earth were due to a single current moving in a circle of radius 2910 km through
an electric generator consists of a rectangular coil of wire rotating about its longitudinal axis which is
A mass (M=2kg) is placed in front of a spring with k=900N/m, compressed d=50cm. The spring is released, shooting the mass forward from A to the spring's equilibrium position at B, What is the velocity of the mass at point C
A cubical piece of heat-shield tile from the space shuttle measures 0.11 m on a side and has a thermal conductivity of 0.059 J/(s m ·C°). How much heat flows from the outer to the inner surface of the tile in six minutes
A copper laboratory tank has a diameter of 0.48 m at 20degree celcius. what would be the new diameter if the tank is filled with 80degree celcius alcohol.
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