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The same object is located at the same distance from two spherical mirrors, A and B. The magnifications produced by the mirrors are mA = 4.0 and mB = 1.7. Find the ratio fA/fB of the focal lengths of the mirrors.
A Styrofoam cup holding 155 g of hot water at 97°C cools to room temperature, 23.0°C. What is the change in entropy of the room
A water slide launches a child horizontally above a swimming pool. The distance from the top of the slide to the launch point is 4.48 m. How far from the launch point does the child land
The brakes of a truck cause it to slow down by applying a retarding force of 7350 N to the truck over a distance of 1090 m. What is the work done by this force on the truck
Particle track detectors are used to measure the speed of particles if the lifetime of the particle is known. Particle X has a lifetime of 256.2 ps. What is the average speed of the particles in terms of the speed of light
A +45?C point charge is placed 42cm from an identical +45?C charge. How much work would be required for an external force to move a +0.70?C test charge from a point midway
A 1350 kg car accelerates uniformly from 35.5 km/h to 75.5 km/h over 250 m. Determine the time taken for the car to accelerate
A solenoid of inductance L = 50 mH has a magnetic energy U = 3 x10-4 J with a density u = 0.0042 J/m3, What is the winding density n of the solenoid
an 8.70 kg block slides with an initial speed of 1.66 m/s up aramp inclined at an angle of 27.4 degree with the horizontal. find the distane the block slides before coming to rest
Gold has one conduction electron per atom. Its density is 19.3gr/cm3,molar mass is 197 gr/mole, determine The drift speed vd of the electrons in the wire
UVB photons have a wavelenghth of 300nm. what is the frequency of UBV photons, What is the energy of a UBV photon in JOULES
A bug starts at the origin of the xy coordinate system with an initial velocity of (2.2 + -0.4) m/s, What is the y position of the bug at t=2 seconds
A 5.65 kg object is released from rest while fully submerged in a liquid. The liquid displaced by the submerged object has a mass of 2.5 kg. How far and in what direction does the object move in 0.200 s, assuming that it moves freely and that the ..
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