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In the rectangle in the drawing, a charge is to be placed at the empty corner to create the net force on the charge at corner A point along the vertical direction. What charge (magnitude and algebraic sign) should be placed at the empty corner?
A solid ball of radius r=1cm rolls down at an incline of theta =30 deg which is 1 meter high. what is the speed the bottom of the incline
At very low termperatures the molar specific heat of many solids is approximately Csubv=AT^3..For alymninum, A=3,15 times 10^-5. how do we know that this is constant volume
The south pole of a bar magnet sits inside a rectangular, closed Gaussian surface, while the north pole sits outside. What is the magnetic flux through the closed surface
Two cars of 2000 kg each collide head-on while traveling at 75.0 miles per hour. What is the temperature increase of the cars
A boat with a horizontal tow rope pulls a water skier. how much work does the rope do on the skier during a forward displacement of 270m
A mass m is lowered gently onto a vertical spring of length L with spring constant k until it just touches the spring. Let y be the distance the spring is compressed and v be the velocity of the mass. When the mass is released from rest, the equation..
A 2.00 nF capacitor with an initial charge of 5.12 µC is discharged through a 1.76 k resistor. What is the maximum current in the resistor
two parallel metal plates have area a 255 cm2 and are separated by l 0.50cm. they have a potential difference of 0.25
A telephone cord is 3.85 m long and has a mass of 0.190 kg. A transverse pulse is produced with plucking one end of the taut cord. The pulse makes four trips down and back along the cord in 0.740 s. What is the tension in the cord?
A 10 kg block of ice has a temperature of -8°C. The pressure is one atmosphere. The block absorbs 4.20 106 J of heat. What is the final temperature of the liquid water?
A horizontal board weighing 198 N is supported at points A and B. The plank serves as a platform for a painter, who weighs 558.5 N. Find out the maximum distance D, such that the plank would not tip, no matter where the painter stands.
A lighthouse sweeps its beam of light around in a circle once every 6.0 s. To an observer in a spaceship moving away from Earth, What is the speed of the spaceship relative to Earth
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