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A rock is tossed straight up by a velocity of 33.3 m/s. When it returns, it falls into a hole 22.5 m deep. What is the rock's velocity as it hits the bottom of the hole?
During a process, 21.6 MJ of heat is added to a closed system. If the internal energy is increased by 59.6 MJ: How much work in Btu was done, Was this work done on or by the system
You are boiling water in an alumunum pot. The radius of the bottom of the pot is 10 cm and the aluminum is 3 mm thick. What is the temperature of the outer surface of the aluminum pot
You've been given the task of designing a "water couch"-that one could lie on, floating on a lake, for instance-in the form of a flat rectangular slab made of Styrofoam with a density of 85 kg/m 3. Explain why he will not be able to breathe that wa..
A man stands on the roof of a 19.0 -tall building and throws a rock with a velocity of magnitude 30.0 at an angle of 42.0 above the horizontal. Calculate the horizontal distance from the base of the building
Two boxes, m1 = 1.0 kg with a coefficient of kinetic friction of 0.10, and m2 = 2.0kg with a coefficient of 0.20, are placed on a plane inclined at 0 = 30o.
the bridge is 3910m long and is constructed of steel. how much longer is the bridge on a warm summer day (30.0 C) than on a cold winter day (-5.0 c)
question1all through a balloon ascension wearing an oxygen mask you calculate the weight of a calibrated 5.50-kg mass
A Styrofoam cup holding 135 g of hot water at 93°C cools to room temperature, 22.0°C. What is the change in entropy of the room
A healthy heart pumps about 70 ml of blood in one heart beat. The average pressure exerted is about 100 mm-Hg and there are 70 heartbeats in a minute. What is the average power output of the heart?
A conducting bar with a mass of 0.155 kg and a length of 16.0 cm is suspended touching two vertical electrical contacts which form an electric circuit with a battery that has an electric potential of 8.5 V. What is the resistance R that exists in t..
a small electric immersion heater is used to heat 100 g of water for a cup of herbal tea. the heater is labeled 200
A 2000 Hz sound wave passes through a wall with two narrow openings 30 cm apart. If sound travels on average 345 m/s, What is the angle of the first order maximum
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