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Two canoes are 10m apart on a lake. Each bobs up and down with a period of 8 seconds. When one canoe is at its highest point, the other canoe is at its lowest point. Both canoes are within a single cycle of the waves. Determine the speed of the waves
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You open a restaurant and hope to entice customers by hanging out a sign (see the figure ). The uniform horizontal beam supporting the sign is 1.80 long, has a mass of 17.0 , and is hinged to the wall. The sign itself is uniform with a mass of 31.0 and over-all length of 1.20 . The two wires...
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A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle.... A fire hose exerts a force on the person holding it. This is because the water accelerates as it goes from the hose through the nozzle. How much force is...
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A kg circus performer oscillates up and down at the end of a long elastic rope at a rate of once every s. By how much is the rope extended beyond its unloaded length when the performer hangs at rest?
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A 0.40 kg ball, attached to the end of a horizontal cord, is rotated in a circle of radius 1.1 m on a frictionless horizontal surface. If the cord will break when the tension in it exceeds 62 N, what is the maximum speed the ball can have?
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A hunter aims directly at a target (on the same level) 111m away. If the bullet leaves the gun at a speed of 221m/s, by how much will it miss the target?
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What is the kinetic energy of a 0.135 kg baseball thrown at 40 meters per second?
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What is the rms speed of the molecules in low-density hydrogen gas at 0 ^\circ {\rm C}? (The mass of a hydrogen molecule, \rm{H_2} , is 3.32 10 27 kg ).
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A steel wire in a piano has a length of 0.6000 m and a mass of 4.500 10-3 kg. To what tension must this wire be stretched in order that the fundamental vibration correspond to middle C (fC = 261.6 Hz on the chromatic musical scale)?
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the distance between two telephone poles id 50.0m. When a 1.00-kg bird lands on the telephone wire midway between the poles, the wire sags 0.200m. draw a free-body diagram of the bird. How much tension does the bird produce in the wire?
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- The Earth’s rate of rotation is constantly decreasing, causing the day to increase in duration. In the year 2000 the Earth takes about 0.548 s longer to complete 365 revolutions than it did in the year 1900.
- (a) What is the average angular acceleration of the Earth?
- (b) If this average acceleration remains constant, in what year will the Earths rotation come to rest?
- 2. I do not understand this Ideal Gas Law and Kinetic Theory question. Can you help me set it up?
- A spherical balloon is made from a material whose mass is 3.00-kg. The thickness of the material is negligible compared to the 1.5-m radius of the balloon. The balloon is filled with helium (He) at a temperature of 305-degrees K and just floats in the air, neither rising nor falling. The density of the surrounding air is 1.19-kg/m^3. Find the absolute pressure of the helium gas
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