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A 115.08 g ice cube at -15°C is placed in an aluminum cup whoseinitial temperature is 74°C. The system comes to an equilibrium temperature of 20°C. What is the mass of the cup?
A 120-V motor has mechanical power output of 3.00 hp. It is 80.0% efficient inconverting power that it takes in by electrical transmission in to mechanical power. Find the current in the motor.
jet rolls onto end of runway before accelerting down runway for takeoff. at point where leaves the ground it is
the starting current in a dc motor is 20 a but it normally operates on 110 volts with a back emf of 90 volts. what is
A 1.5kg weight hangs from a 8.0kg, solid wheel with a 20 cm circumfrence by a thin string wrapped several times around the circumfrence. How fast (in radians/second) is the wheel turning just before the weight hits the floor
Object O1 is 15.0 cm to the left of a converging lens of 10.0-cm focal length. A second lens is positioned 10.0 cm to the right of the first lens, What is the focal length of the second lens
a light spring with spring constant 1300 nm hangs from an elevated support. from its lower end hangs a second light
A model rocket blasts off from the ground, rising straight upwardwith a constant acceleration that has a magnitude of 80.4m/s2 for 1.72 seconds, at which point its fuel abruptlyruns out. Air resistance has no effect on its flight. What maximum altit..
A 15.0-kg block of ice at 0 °C melts to liquid water at 0 °C inside a large room that has a temperature of 20.0°C. Calculate the net entropy change of the system
Ship moving initially at 10.7 m/s due North, drifts due NE at the same speed. To correct the bearing, the captain accelerates the engine and turns the rudder NW. If the engines deliver a constant acceleration of 4.4 m/s2, how long will it take to a..
The mass of the Space Shuttle orbiter is 8.8 x 104 kgand the period of its orbit is 82 minutes. Estimate thekinetic energy of the orbiter and the work done on it by gravitybetween the launch and orbit. (
A bullet of mass mb is fired horizontally with speed v1 at a wooden block of mass mw resting on a frictionless table. The bullet hits the block and becomes completely embedded within it. After the bullet has come to rest within the block, the bloc..
A negative lens has a focal length of -10 cm. An object is located 20 cm from the lens. determine How far from the lens is the image
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