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If I have an aluminum cylinder whose radius is 5cm and height is 4cm and initially its T is 50°C. The aluminum's density is 2.7g/?cm?^3. If I put it into 1000mL water and initially the water is 90°C, (1) what is the final temperature of the cylinder and water?(2) How much heat is transferred from water to cylinder?(3) If I put the aluminum cylinder into cold water whose initial T is 50°C, then what is the final T now?
A small conductive rod of length 1.4 m moves with a constant velocity v=11 m/s in a direction parallel to a long wire carrying a current of 34 A. Calculate the electric potential induced across the rod
The magnetic field of the brain has been measured to be approximately 3.0 x 10^-12 T. Although the currents that cause this field are quite complicated, we can get a rough estimate of their size by modeling them as a single circular current loop 1..
When four people with a combined mass of 300 kg sit down in a 2.0 103-kg car, they find that their weight compresses the springs an additional 0.65 cm. What is the frequency of the car's vibration
A 3.5-cm tall object is viewed through a converging lens. When the lens moves from one place to another, the orientation of the image changes from upright to inverted. How far from the object does the lens stop
The angular momentum of a flywheel having a rotational inertia of 0.148 kg·m^2 about its central axis decreases from 6.70 to 0.560 kg·m^2/s in 3.50 s. How much work is done on the wheel
When a person inhales, air moves down the windpipe at 15 cm/s. determine the pressure drop of the constriction
Nichrome wire of cross-sectional radius 0.782 mm is to be used in winding a heating coil, find the length of wire you must use to wind the coil
A horizontal rod 0.200 m long carries a current through a uniform horizontal magnetic field of magnitude 0.067 T that points perpendicular to the rod. what is the current flowing through the rod
A projectile of mass 7 kg is fired with an initial speed of 193 m/s at an angle of 16? with the horizontal. At the top of its trajectory, projectile explodes into two fragments of masses 4 kg and 3 kg.
A home run is hit in such a way that the baseball just clears a wall 20 m high, located 116 m from home plate. Find the time it takes the ball to reach the wall
question when an electroscope is charged its two leaves repel each other and remain at an angle. what balances the
A light, rigid rod is 59 centimeter long. Its top end is pivoted on a frictionless horizontal axle. Find what minimum speed at the bottom is required to make the ball go over the top of the circle
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