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A company that produces pulsed gas heaters claims its efficiency is approximately 90%.
If the engine operates between 250 degrees C and 25 degrees C, what is its maximum thermodynamic efficiency?
A current loop in a motor has an area of 0.85cm2. It carries a 240 mA current in a uniform field of 0.62 T. What is the magnitude of the maximum torque
A mirror that is spherical has a focal length of -15 cm. what type of image would it be, What is the magnification going to be
A 1600 kg car starts from rest at A, coasts 180m through a dip and comes to stop at B after coasting a distance d on level ground. If the rolling resistance is a constant force of 280N, conclude the distance d.
The coefficient of static and kinetic frictions between a 3 kg box and a desk are .4 and .3 respectively. What is the net force on the box when a 10 N horizontal force is applied to the box
A blue car with mass mc= 459 kg is moving east with a speed of vc= 20 m/s and collides with a purple truck with mass mt= 1246 kg that is moving south with a speed of vt= 10 m/s. find the magnitude of the initial momentum of the car
Romeo (74.0 kilogram) entertains Juliet (58.0 kilogram) by playing his guitar from the rear of their boat at rest in still water, Obtain how far does the 81.0 kilogram boat move toward the shore it is facing
An ocean liner leaves New York City and travels 18.0° north of east for 232 km. How far east and how far north has it gone? In other words, what are the magnitudes of components of the ship's displacement vector in the following directions.
A ball bearing is dropped from rest at a point A. At the instant it passes a mark 4.0 m below A, another ball bearing is released from rest from a position 5.0 m below A, How far does the second bearing fall in that time
You have a set of converging lenses with focal lengths 2.00 cm, 12.0 cm, 58.5 cm, and 77.5cm. What is the angular magnification of the telescope
An uncharged solid metal sphere of radius R = 1.72 mm sits with its center at a distance of D = 63.1 cm from two point charges ± q = ± 4.9 × 10^–8 C which form a dipole. The two point charges are separated by a distance d = 8.04\mu m, as shown in the..
A mass m orbits around a planet of mass M in a parabolic orbit of the form y = x^2/(4L), which has focal length L. Find the angular momentum in 3 different ways: a) Find the speed at closet approach.
There are four charges each with a magnitude of 2.0 μC. Two are positive and two are negative. Find the magnitude of the net electrostatic force
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