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A laboratory technician drops an 83.5g solid sample of unknown material at a temperature of 100?C into a calorimeter. The calorimeter can is made of 0.130kg of copper and contains 0.190kg of water, and both the can and water are initially at 20.0?C. The final temperature of the system is measured to be 26.0?C.
Compute the specific heat capacity of the sample. (Assume no heat loss to the surroundings.)
a solenoid with length of 2.71 m and N= 311 turns/m carries a current 2.63 A. It stores 2.57 J of energy. What is the cross-sectional area of the solenoid
A bicycle racer sprints at the end of a race to clinch a victory. The racer has an initial velocity of 13.0 m/s, What is his final velocity
A convex mirror has a focal length of -20 cm. What is the position of the resulting image in cm if the image is upright and one-fourth the object size
Suppose you have a spherical balloon filled with air at room temperature and 1.0 atm pressure; its radius is 18cm, what's the balloon's new radius
The model airplane in Figure 5.6 is flying at a speed of 11.6 m/s on a horizontal circle of radius 19.9 m. The mass of the plane is 1.12 kg. What is the net work done on the plane
The temperature in Browning, Montana, was 44.0 °F on January 23, 1916. The next day the temperature plummeted to - 56.0 °F. What was the temperature change in Celsius degrees?
a 0.346kg glider moves along a frictionless level air track tugged by a mass of 0.050kg suspended vertically over a pulley
The barrel has a length of 0.60 m and an opening whose radius is 2.8 10-3 m. A bullet (mass = 2.7 10-3 kg) has a speed of 380 m/s after passing through this barrel. Ignore friction and examine the average pressure of the expanding gas.
A speeder is pulling directly away and increasing his distance from a police car that is moving at 25 m/s with respect to the ground. Find the speeder's speed with respect to the ground
An aluminum-alloy rod has a length of 10.006 cm at 23.400°C and a length of 10.024 cm at the boiling point of water, What is the length of the rod at the freezing point of water
A young girl with mass 35.5kg is sliding on a horizontal, frictionless surface with an initial momentum that is due east and that has magnitude 86.0kg?m/s, How much work has been done on the girl by the force in the time interval from t= 0s to the ..
A golf ball is dropped from rest from a height of 8.30 m. It hits the pavement, then bounces back up, rising just 5.90 m before falling back down again, calculate the total amount of time that the ball is in the air
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