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A 50 g ice cube floats in 200 g of water in a 100 g copper cup; all are at a temperature of 0°C. A piece of lead at 96°C is dropped into the cup, and the final equilibrium temperature is 12°C. What is the mass of the lead?
When a spring cannon is horizontal, above the ground by 0.83m. by what factor would you expect the range to change
At the end of an amusement park ride, you want the gondola to stop without the acceleration exceeding 2 g's. determine the maximum allowed braking force
A father pushes his child on a swing so that the child's speed is 9.00 m/s at the lowest point of his path. What force does the child exert on the seat if his mass is 18.0 kg
A 65.0 kg object slides down a 30o angle slope from rest at a height of 15.0 m. The coefficient of kinetic friction between the object and the slope surface is 0.15. What is the object's speed at the bottom of the slope
A sports car moving at constant speed travels 90 m in 4.9s. If it then brakes and comes to a stop in 4s, what is its acceleration? Express the answer in terms of g's, where g = 9.80 m/s2. (Take the positive direction to be direction of travel.)
What is the effective resistance of a parallel combination of a very large resistance and a very small resistance, what will be the current through each resistor
A 4.00mm -tall object is 27.0cm from the center of a silvered spherical glass Christmas tree ornament 6.00cm in diameter. What is the position of its image
the velocity of a boat with respect to the water is 4.0 m/s at an angle of 30.0 degrees North of West. find the velocity of the boat with respect to the ground
Two parallel metal rods form a plane inclined at 20.0° to the horizontal. The upper end of the rods are connected together by a resistor of 102.0 ?. What is the maximum speed of the bar
A 16.0 kg wheel, essentially a thin hoop with radius 1.70 m, is rotating at 426 rev/min. It must be brought to a stop in 11.0 s. How much work must be done to stop it
A certain lightbulb filament when hot has a resistance of205 %u03A9. What current is flowing through the bulb at that time
Two capacitors are connected parallel to each other. Let C1= 3.50?F ,C2 = 5.50?F be their capacitances, Calculate the potential difference across each capacitor
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