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When viewed in a spherical mirror, the image of a setting sun is a virtual image. The image lies 12 cm behind the mirror. (a) What is the focal length of the mirror? (b) What is the radius of curvature of the mirror?
A record (mass 100g and radius 12cm) is rotating at a rate of 33rpm. What is the new rotational rate if angular momentum is conserved
What is the magnitude of the net torque exerted on the branch by the children? Suppose that the axis is located where the branch joins the tree trunk and is perpendicular to the plane formed by the branch and the trunk.
Calculate the coil's self-inductance. If the current decreases uniformly from 5.00 to 2.00 in 3.00, estimate the self-induced emf in the coil.
your car engine just died. your were moving rightward at 25 m/s, but your car slows to a rest in a distance of 120 m. what net average force was exerted on the car
A horizontal rifle is fired at a bull's-eye. The muzzle speed of the bullet is 650 m/s. find the horizontal distance between the end of the rifle
The surface temperature of the start Betelgeuse is 3500K. Assume Betelgeuse radiates as a perfect blackbody. what is the energy of each of these photons
A cell membrane has a surface area of 1.00 x 10-7 m2, a dielectric constant of 5.17 and a thickness of 8.17 nm. How many positive ions are there on the outside of the membrane
Two red blood cells each have a mass of 9.05 × 10-14 kg and carry a negative charge spread uniformly over their surfaces. What is the maximum accleration of the cells as they move toward each other and just touch
Two pieces of steel wire with identical cross sections have lengths of L and 2L. what is the frequency of the third harmonic in the longer wire
A charge of +1.00 10-6 C is located 29 cm from a charge of -4.00 10-6 C. What is the magnitude of the force exerted on each charge
Laser light of wavelength 400 nm illuminates an array of very narrow slits, producing an interference pattern on a screen 70 cm from the slits. compute the separation between the slits
an astronaut on mars might lean over the edge of 25.0 meter tall spacecraft, How much time will it take for the package to strike the ground
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