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Water skiers of tern ride to one side of the center line of a boat. In this case, the ski boat is traveling at 15 m/s and the tension in the rope is 75N. If the boat does 3500J of work on the skier in 50.0m, what is the angle θ among the tow rope and the center line of the boat?
It's possible to use the ideal-gas law to show that the density of the earth's atmosphere decreases exponentially with height, What is the weight of a column of air
two blocks are suspended over a pulley. The pulley can be treatedas a uniform solid cylindrical disk. find the mass of the pulley
Brass is an alloy of copper and zinc. Does the addition of zincto copper cause an increase or decrease in the speed of sound inbrass rods compared to copper rods? Explain.
A high-voltage power line carries a current of 110 A at a locationwhere the Earth's magnetic field has a magnitude of 0.59 G andpoints to the north, 72 degrees below the horixontal.
A useful model of a water molecule is sketched in the figure below, with point charges of 5.2 10-20 C at the H sites, What is the total electric potential energy of this model of a water molecule
Suppose a conducting sphere of radius 40 cm has a charge of 7 mC and a mass of 2 kg. What is the electric potential at the center of the sphere
a large parallel plate capacitor has plate separation of 0.92 cm and plate area of 266 cm2. the capacitor is connected
Two astronauts are 1.40 m apart in their spaceship. One speaks to the other. The conversation is transmitted to earth via electromagnetic waves. How far away from the earth is the spaceship
evaluate what value of the distance d should a driver locate his car if he wishes to stay on a circular path without depending on friction?
A spaceship with a proper length of 101 m passes an observer at a speed of 0.82770c. What is the length of the ship as seen by the observer
A satellite in a circular orbit around the earth with a radius 1.011 times the mean radius of the earth is hit by an incoming meteorite. Calculate the amount of that work converted to heat
a uniform rod of length 0.820 m and mass 13.0 kg is balanced on a sharp edge at 0.660 m from the left end. at the left
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