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A 1.0 kg block of aluminum isheated at atmospheric pressure so that its temperature increasesfrom 22°C to 38°C.
(a) Find the work done on thealuminum.
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(b) Find the energy Q added to the aluminum.
(c) Find the change in internal energy of the aluminum.
The earth has a vertical electric field at the surface, pointing down, that averages 120 N/C. What is the excess charge on the surface of the earth
How much friction must be exerted between the skates and ice.
An ideal gas expands at a constant total pressure of 5.4 atm from 405 mLto 668 mL. Calculate the total heat flow into the gas
A vertical force F is applied to a block of mass m that lies on a floor. what happens to the magnitude of normal force on the block from the floor as magnitude F is increased from zero if force F is downward?
An isolated conducting sphere has a 9cm radius. One wire carries a current of 1.000 002 0 A into it.Another wire carries a current of 1.000 000 0 A out of it. How longwould it take for the sphere to increase in potential by800 V?
If a 56 diameter circular disk is uniformly angularly accelerating at a rate of 5.0 rad/s2, What angle is subtended over that time
Vector A is in the direction 44.0 clockwise from the negative y-axis. The x-component of is = -19.0 What is the -y component of A? What is the magnitude of A.
Describe how to find moment of inertia. Provide equations allowing to find moment of inertia of a solid cylinder and of a cylindrical ring. State Newton's Second Law for rotational motion
A cyclotron accelerates two protons directly toward each other, each with a speed of 950 km/s , measured relative tothe earth. Find the maximum electric force in N that these protonswill exert on each other.
A 3.0 kg mud ball drops from rest at a height of 10 m. what is the average net force exerted by the ball
You've made the finals of the Science Olympics! As one of your tasks, you're given 1.5g of copper and asked to make a cylindrical wire, What length l will you choose for your wire
a segment of wire of total length 2m is formed into a circular loop having 5 turns if the wire carries a 1.2A current determined the magnitude of the magnetic field at the center of the loop
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