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A flexible chain weighing 37.0 N hangs between two hooks located at the same height. At each hook, the tangent to the chain makes an angle ? = 41.5° with the horizontal.
a) Find the magnitude of the force each hook exerts on the chain.
b) Find the tension in the chain at its midpoint.
Some mass spectrometers use an electric field to give the incoming ions a certain known kinetic energy as they enter the magnetic field. What is the final kinetic energy of the ion just before it reaches the ion detector
A movie star catches a reporter shooting pictures of her at home. She claims the reporter was trespassing and to prove her point, How far away from the subject was the reporter standing
On a cool morning, when the temperature is 15deg Celsius, you measure the pressure in your car tires to be 30 psi. After driving 20 mi on the freeway, temperature of your tires is 45 deg Celsius. What pressure will your tire gauge now show.
An electron has an initial velocity of 3.50 106 m/s in the x direction. It enters a uniform electric field = (400 N/C) , which is in the y direction. (a) Find the acceleration of the electron.
One method for measuring the speed of sound uses standing waves. A cylindrical tube is open at both ends, find the speed of sound in the gas in the tube
In a mass spectrometer the charged particles have to reach a common specific speed. To do so, they are accelerated with an electric field, determine the direction of the magnetic force
The four tires of an automobile are inflated to a gauge pressure of 2.1 105 Pa. Determine the weight of the automobile
A 4.00 kg model rocket is launched, expelling 46 g of burned fuel from its exhaust at a speed of 590m/s. What is the velocity of rocket after the fuel has burned? Hint: overlook the external forces of gravity and air resistance.
The venturi flowmeter shown in the figure is used to measure the flow rate of water in a solar collector system. The flowmeter is inserted in a pipe with diameter 1.9 {rm cm}; at the venturi of flowmeter the diameter is reduced to 0.64 {rm cm}. Th..
A person with a mass of 60 kg climbs up to a diving board 4 meters above a swimming pool. How much work does the person do
A 175 watt motor is used to lift a 129 kg container to a height of 7m. How much time does it take to lift container with the motor.
A small remote-control car with a mass of 1.60 kg moves at a constant speed of v = 14.0 m/s in a vertical circle inside the hollow metal cylinder that has the radius of 5.00 m.
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