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A clown is using a concave make-up mirror to get ready for a show and is 27 cm in front of the mirror. The image is 61 cm behind the mirror. Discover (a) the focal length of the mirror and (b) the magnification.
A 69-kg construction worker stands at the far end of the beam. What is the magnitude of the torque about the point where the beam is bolted in place.
The toadfish makes use of resonance in a closed tube to produce very loud sounds. The tube is its swim bladder, used as an amplifier. Calculate the intensity of the sound wave emitted
A ball (mass 100g) is recorded to have a speed of 2m/s after falling 5m under gravity. What is the work done by air resistance
Two sinusoidal waves of the same period, with amplitudes of 7.0 and 9.0 mm, What is the phase constant of the other wave
A satellite in a circular orbit around the planet Glob-IV has an orbital period of 246 minutes. Find the height of the satellite above the planet's surface
When 22.1 J was added as heat to a particular ideal gas, the volume of the gas changed from 37 cm3 to 60 cm3 while the pressure remained constant at 1.2 atm. By how much did the internal energy of the gas change
The shaft shown below has a solid round cross-section & is supported by bearing at A & B. Find the location of maximum bending stress in the shaft.
one electron is at the origin of a coordinate system. a second electron somewhere in the x-y plane feels a force 2.4 x
A coaxial cable has a center conductor and an outercylindrical conductor with an insulating material in between. What is the magnetic field outside the cable if a currentof 2 A is flowing to and from a device
A 2.00 meter long wire loops carrying a current of 2.00 A is in the shape of an equilateral triangle. determine the maximum torque that acts on it
Find the final velocities of (a) the 2.70-kg ball and of (b) the 7.10-kg ball if the collision is elastic. (c) Find the magnitude and direction of the final velocity of the two balls if the collision is completely inelastic.
A 1480{\rm kg} car pulls a 320{\rm kg} trailer. The car exerts a horizontal force of 3900{\rm N} against the ground in order to accelerate. What force does the car exert on the trailer
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