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In figure (a), a 4.6 kg dog stands on a 20 kg flatboat at distance D = 6.1 m from the shore. It walks 2.2 m along the boat toward shore and then stops. Assuming no friction between the boat and the water, find how far the dog is then from the shore.
One liter of water is 41C is used to make iced tea. How much ice at 0 C must be added to lower the temperature of the tea to 17C? The specific heat of water is 1 cal/g C and latent heat of ice is 79.7 cal/g. Reply in units of g.
A flea's eye having a diameter of 0.003 mm is examined under a microscope. If the microscope has a magnification of 500X, determine the size of the image of the eye
A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 11.0 m/s due north relative to the water. If the river is 330 m wide, explain how far downstream has the boat moved by the time it reaches the ..
It again strikes the floor. Find (c) the time interval from when the ball was launched to when the ball strikes the floor and (d) the horizontal distance from the point where the ball was launched to the point where the ball strikes the floor.
A hanging mass, M1 = 0.18 kg, is attached by a light string that runs over a frictionless pulley to the front of a mass M2 = 0.47 kg that is initially at rest on a frictionless table. A third mass M3 = 0.71 kg, which is also initially at rest on a fr..
You find an unlabeled box of fine needles, and want to determine how thick they are. What is the diameter of the needle
An initially neutral conductor contains a hollow cavity in which there is a -100 nC point charge. what is the charge on the inner wall of the cavity wall
A jet pack is turned on for 10 seconds and performs 1500 joules of work to move an astronaut in space who was initially at rest. What the power of the jet pack in watts
When resistors 1 and 2 are connected in series, the equivalent resistance is 19.7 ?. When they are connected in parallel, the equivalent resistance is 3.96 ?. What are the larger resistance of these two resistors
the pressure and temperature of steam entering an adiabatic turbine are 4000kPa and 400 degrees C, respectively. if the pressure and the temperature of the working fluid at the exit are 200kPa and150 degrees C
The tires of a car make 86 revolutions as the car reduces its speed uniformly from 88.0 km/h to 60.0 km/h. What is the angular acceleration of the tires in rad/s^2
A child throws a snowball over a wall. The horizontal distance which the snowball travels is 3.83 m. Determine the initial speed of the snowball
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