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A 804 kg car is going 20 m/s and the driver has to slam on his brakes to prevent an accident. Assume that a total of 21.5 kg of iron in the brake pads and rotors absorb the heat produced by the friction between the brake pads and rotors. After the car has stopped, what is the change in temperature of the brake pads and rotors? You do not have to enter units for this problem, only the numeric value to two decimal places.
An equilateral triangle has sides of lengthL. Charges of +Q,-2Q,and +3Q are placed at the vertices. Find the electric field midway between the two positive charges
A 60.0 kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.760 and 0.410, correspondingly. What horizontal pushing force is required to (i) just start the crate moving and (ii) slide the crate ..
A particle with a charge of 31?C moves with a speed of 72m/s in the positive x direction. The magnetic field in this region of space has a component of 0.38T in the positive y direction, what is the magnitude of the magnetic force on the particle
Two slits of equal width are a distance 0.57 mm apart and are illuminated by coherent, mono-chromatic light. compute the widths of the slits
You have a converging lens with a focal length of 0.85 m, and wish to construct a refracting telescope with an angular magnification of âˆ'45. what should be the focal length of the second lens
If an Acura Integra accelerates from 0 to 60 mph in 4 seconds, which one has the larger acceleration
A charge of 1 uC accelerates through a potential difference of 200V. What is the change in the electric potential of the charge
It is 155cm from your eyes to your toes. You're standing 190cm in front of the tall mirror. How far is it from your eyes to the image of your toes.
During an initial stage of construction, the beam is not to be bolted to the wall, but to be held in place solely by friction. What is the least coefficient of friction between the beam and the wall for the beam to remain in static equilibrium.
The 40 kg man in the roller coaster car is sitting on a bathroom scale. If he is travelling at 35.3 m/s at the point shown and the radius of vertical coaster track is 53 meters, to the nearest newton what does the scale read?
A convex Lens of focal length 18 cm is used as the magnifying glass. At what distance from a tiny insect should you hold this lens to get a magnification of +3.00.
A swimming pool has dimensions 29 m x 34 m and a flat bottom, what is the total force due to the water on the bottom
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