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It is desired to cool iron parts from 500°F to 100°F by dropping them into water that isinitially at 65°F. Assuming thatall the heat from the iron is transferred to the water and thatnone of the water evaporates, how many kilograms of water areneeded per kilogram of iron?
kg
You drop a 297-g silver figure of a polar bear into the 245-g aluminum cup of a well-insulated calorimeter containing 257 g of liquid water at 22.7°C. What is the final temperature of the water, cup, and bear
A plastic ball in a liquid is acted upon by its weight and by a buoyant force. The weight of the ball is 4.8N. The buoyant force has a magnitude of 6.5N and acts vertically upward. External force acting on the ball maintains it in the state of res..
A guitar string is 90cm long and has a mass of 3.6g from the bridge to support post (L) is 60cm and the string is under the tension of 560. What are the frequencies of fundamental and first two overtones.
A bus accelerates at 1.5 m/s/s from rest for 12s. It then travels at constant speed for 25s, How far did the bus travel
shallow glass dish whose width w is 4.40 cm. When an observer's eye is placed as shown, the observer sees the edge of the bottom of the empty dish, Find the height h of the dish
A +10uC charge is 20cm away from a -40uC charge. Detrmine the field of intensity
On a cold day, Ming rubs her hands together to warm them up. She presses her hands together with a force of 4.1 N. by how much has the internal energy of her hands increased
A mass of 6.70 kg is suspended from a 1.15 m long string. It revolves in a horizontal circle, Calculate the angle between the string and the vertical
Find out the frequency of the fourth harmonic if the string is fixed at one end and free at other. (That is, if the free end is attached to a long string of negligible mass.)
The velocity vs. time curve of an object is an increasing straight line. You observe when the time is 1 second that the velocity is equal to 3 m/s, What is the acceleration of the object
A steel sphere 3.0 cm in diamter has a mass of 0.11 kg. What is the mass of a steel sphere 5.0 cm in diameter
The flywheel in a car is a solid cylinder with a mass of 100 kg, a radius of 11 cm, and a length of 5.0 cm. What is the kinetic energy of the cylinder
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