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200 gram of ice at 0°C is dropped into a calorimeter of negligible heat capacity containing 350 gram of water at 20°C. Determine the temperature of the system when it reaches equilibrium? The latent heat of fusion of water is 80 cal/g.
A particle moves with constant velocity [4, -2, 1] m/s. If its mass is 3 kg, what is its kinetic energy? One of the forces acting on it is given by F = [-1, 2, 2] N. Find the work done by this force on the particle as it moves a distance of 3 m.
A converging lens (f = 24.6 cm) is used to project an image of an object onto a screen. Find the two object distances
the astronaut whose heart rate on earth is 60 beats/min increases his velocity to v=.8c. Now what is his heart rate as measured by an earth observer
A flatbed truck going 100 km/h rounds a horizontal curve of 300 meter radius inwardly banked at 10 degree. Obtain the friction force F action on the crate
a person is standing outdoors in the shade where the temperature is 17 degc.a what is the radiant energy absorbed per
An electron with a speed of 5.16 × 108 cm/s in the positive direction of an x axis enters an electric field of magnitude2.16 × 103 N/C, Determine how much time will have elapsed
Car A has two times the mass of car B, but only 0.4 as much kinetic energy. Find the ratio between the speeds of the two cars
Consider a rectangular loop of wire 6.6cm by 8.5cm in a uniform magnetic field of magnitude 2.0T . The loop is rotated from a position of zero magnetic flux to a position of maximum flux in 22ms .
A horizontal pipe contains water at a pressure of 140kPa flowing with a speed of 1.2m/s . The pipe narrows to one-half its original diameter. What is the speed of the water
A woman stands on a scale in a moving elevator. Her massis 60.0 kg and the combined mass of the elevator and scale is anadditional 815 kg. What does the scale readduring the acceleration
A 70 kilogram astronaut is standing on a scale in a spaceship. While the ship is moving in a straight line with a constant velocity of100 m/s near a large planet, Determine what does the scale read now
An electric utility company supplies a customer's house from the main power lines (120 V) with two copper wires, find the power delivered to the customer
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