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A glass contains 0.25kg of water at 0c, 0.15kg of ice, also at 0c, is added to water and it is noticed that after 11 minutes all the ice has melted and all the water is now at 15c. Assuming that the thermal capacity of the glass may be ignored, calculate the thermal energy absorbed by the ice for t to melt, total thermal energy absorbed by the contents of the glass average rate of energy absorption by the contents of the glass. specific latent heat of ice 3.4 X 10 to the power 5 j kg-1 water 4200jkg-1K-1
An electric heater rated at 750w is used to raise the temp of water to boiling point. Calculate how long this would take if no heat is lost to the surroundings.
a car tyre has an internal volume of 2.2 times 10-2 m3. one day when the car has been left standing and the temperature
A 600 kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. Bob's rope pulls to the left, What is the tension in the vertical main cable
A concave mirror (f = 35cm) produces an image whose distance from the mirror is one-fourth the object distance. Decide the object distance. Decide the (positive) image distance.
A lens for a 35-mm camera has a focal length given by f = 54mm, What is the magnification of the image on the film
An unstable high-energy particle is created in the laboratory, and it moves at a speed of 0.962c. Calculate what is the dilated lifetime
A skier starts from rest from the top of a 285m hill. What is the skier speed at the bottom of the hill
A child stands at the rim of a rotating merry-go-round of radius 2.8 m. The child has a mass of 51.0kg, and the carousel turns with an angular velocity of 2.3 rad/s. What minimum coefficient of static friction is required
a hollow metal sphere has inner and outer radii of 7 cm and 10 cm radii. a point charge is located at the center is
A child attempts to drink water by a 100 long straw but finds that water rises only 75 .By how much has the child reduced the pressure in her mouth below atmospheric pressure.
Space invaders land on earth. On the invaders' temperature scale, the ice point is at 25°I (I = invader), and the steam point is at 153°I.
In a diesel engine, the piston compresses air at 302 K to a volume that is one-sixteenth of the original volume, What is the temperature of the air after the compression
A pipe of 20 cm diameter is carrying a discharge of 0.1 m3/sec. If the diameter of the pipe is reduced to 5 cm at its end, calculate the velocity and velocity head at the pipe outlet.
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