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A cube of ice is taken from the freezer at -7.1 Cand placed in a 96 g aluminum calorimeter filled with 308 g of water at room temperature of 20.0 C. The final situation is observed to be all water at 17.0 C. What was the mass of the ice cube?
It continues to fly along the same horizontal arc, but increases its speed at the rate of 1.45 m/s2. Find out the acceleration in this situation at the moment the hawk's speed is 4.60 m/s.
The coefficient of kinetic friction is 0.350. Illustrate what should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?
A stainless steel flask with volume 10 liters is filled with 1.4 moles of helium gas at 27 C. What is the average RMS speed of the helium atoms now
The mass of Venus is 81.5% that of the earth, and its radius is 94.9% that of the earth. If a rock weighs 75.0N on earth, what would it weigh at the surface of Venus
A uniform plank of length 5.5 m and weight 205 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support .To what distance x can a person who weighs 447-N walk on the overhanging part of the plank before it just ..
questiona student standing on a stationary skateboard tosses a textbook with a mass of mb 1.55 kg to friend standing
Suppose that the sound level of a conversation is initially at an angry 72 dB and then drops to a soothing 50 dB. determine the initial and final sound intensities
The speed of a 1kg object is 2.0m/s (+/-) .05m/s, meaning its absolute uncertainty is .5m/s, calculate the absolute uncertainty in the kinetic energy
A car wheel in diameter of 30 inches has a linear velocity of 30 mph. The car accelerates for 10 seconds. What is the angular displacement of the car wheel during the 10 seconds of acceleration
The fastest growing plant on record is the Hesperoyucca whipplei. Suppose a plant of this type grows 2.3 m in 14 days. What is its growth rate in micrometers per second
A tire is filled with air at15°C to a gauge pressure of 210kPa. If the tire reaches a temperature of 36°C, what fraction of the original air must be removed
An elastic circular conducting loop expands at a constant rate over time such that its radius is given by r(t) = r0 + vt, where r0 = 0.170 m and v = 0.0290 m/s. estimate the direction and the magnitude of the induced current
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