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A block of mass 2 kg is initially moving with speed 4m/sec at point A on a smooth inclined plane with andle 60 degrees to the horizontal. At point B on the plane (1m down the plane from point A), its speed is vb. Find vb.
how many electrons flow through a 1500 watt electric spaceheater operating with a 120 volt input and a current of 12.5amperes for 600 seconds
A seagull flies at a speed of 10m/s directly into the wind. Knowing that it takes the bird 25 min to travel 8km relative to the earth, find the velocity of the wind. How long will it take the seagull to travel a distance of 12km with the wind?
Two equal point charges of magnitude 4.0 ?C are situated along the x-axis at x1 = -2.0 m and x2 = -2.0 m. What is the electric potential energy of this system of charges
After a 3.01 resistor is connected across a battery with a 0.21 internal resistance, What is the rated emf of the battery
As a 1.00 mol sample of a monatomic ideal gas expands adiabatically, the work done on it is -2500 J. Calculate the final pressure and temperature
A 20.0 kg wagon is being pulled over a level driveway by a horizontally directed pulling force of 140 N. If there is a 100 N friction force opposing its motion, What is the forward acceleration of the wagon
The air inside a bicycle tire pump has 172 joules of work done on it as 64.8 joules of heat is conducted away from it
A 22 V battery is connected to a parallel-plate capacitor with a plate area of 0.28 m2 and a plate separation of 2.1 mm. What is the resulting charge on the capacitor
A spherical mirror has a focal length of -14 cm. Where is the mirror's image for an object which is at a distance of 30 cm? Draw the ray diagram for this set up
A generator produces 60 A of current at 120 V. The voltage is usually stepped up to 4500 V by a transformer and transmitted through a power line of total resistance 1.0 Ù
A thermos contains 154 cm3 of coffee at 93.5 °C. Tocool the coffee, you drop two 12.7-g ice cubes into the thermos.The ice cubes are initially at 0 °C and melt completely. What is the final temperature of the coffee in degrees Celsius? Treatthe coffe..
The mass of an object is 332 g, and its volume is determined to be 25 cc. What is the mass density of the object
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