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A spherical mirror has a focal length of -14 cm. Where is the mirror's image for an object which is at a distance of 30 cm? What type of image is it? What is its magnification? Draw the ray diagram for this set up.
You are driving into St. Louis, Missouri, and in the distance you see the famous Gateway-to-the-West arch. This monument rises to a height of 192 m. You estimate your line of sight with the top of the arch to be 4.5° above the horizontal. Approxim..
Suppose you need to image the structure of a virus with a diameter of 50 nm, For light of wavelength 2.5nm, what is the energy (in eV) of a single photon? In what part of the electromagnetic spectrum is this
Assume that the partner moves on a circle that has a radius of 6.50 m. At a swinging speed of 4.45 m/s, what force must the man apply to his partner in the straight-down position?
A pitcher throws a curveball that reaches the catcher in 0.55s. The ball curves because it is spinning at an average angular velocity of 280rev/min (assumed constant) on its way to catcher's mitt.
A 8.0 µC point charge and a 9.0 µC point charge are a distance L apart. Where should a third point charge be placed so that the electric force on that third charge is zero?
Smaller mammals use proportionately more energy than larger mammals; that is, it takes more energy per gram to power a mouse than a human. A typical mouse has a mass of 20 g and, at rest, needs to consume 3.0 Cal each day for basic body processes.
Furthermore, describe any differences in kinetic energy and gravitation potential energy among these balls while they hit the ground.
A 2000 kg elevator initially is moving with speed 2 m/s as it passes the 5th °oor. How much work is done by nonconservative forces during the 10 second interval
A door of width 1.0 and height 2.0 weighs 279 and is supported by two hinges, one a distance 0.500 from the top and the other a distance 0.50 from the bottom. Each hinge supports half the total weight of the door.
Consider a violin string with a vibrating length of 30 cm. If the speed of a wave on this string is 250 m/s, what is the tension in the string? Hint: You will have to estimate the diameter of the string. Assume the density is the same as that of s..
A wave on a string is described by the equation y = (4.2 mm)cos(3000t 0.45x) where t is measured in s and x is measured in mm
A 105-kg water skier floating in a lake is pulled from rest to a speed of 14 m/s in a distance of 25m. What is the net force exerted on the skier, assuming his acceleration is steady.
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