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A luminous object is 4.80m from a wall. You are to use a concave mirror to project an image of the object on the wall, with the image 2.23 the size of the object.
How far should the mirror be from the wall?
What should its radius of curvature be?
A current of 13.0 mA is maintained in a single circular loop of 3.20 m circumference. A magnetic field of 0.710 T is directed parallel to the plane of the loop. (a) Calculate the magnetic moment of the loop
A 4 kilogram block of ice is removed from a freezer where its temperature was maintained at ? 20 degrees Celsius. How much heat does the ice absorb as it is warmed to ? 10 degrees? (The specific heat capacity of ice is 2,000 joules per kilogram de..
q1. calculate the de broglie wavelength of the electron in the n1 state of the hydrogen atom.q2. calculate the de
Two parallel square metal plates (side length: 13 cm) are separated by a dielectric material with a dielectric constant 3.9 and a thickness of 2.4 mm. The plates are connected to a 11 V power source and allowed to fully charge.
ice of mass 15.0 kg at 0.00deg c is placed in an ice chest. the ice chest has 2.30 cm thick walls of thermal
A 270-m-wide river flows due east at a uniform speed of 3.5 m/s. A boat with a speed of 7.6 m/s relative to the water leaves the south bank pointed in a direction 25o west of north. What is the (a) magnitude and (b) direction of the boat's velocit..
Project Seafarer was an ambitious program to construct an enormous antenna, buried underground on a site about 10000 km2 in area. What would be the frequency of the radiations emitted
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 14.0cm , giving it a charge of -11.0μC. Find the electric field just outside the paint layer
The vibration of an o2 molecule has a wavenumber of 1580.4 cm^-1 Calculate the energy (in joules) of the first excited state?
In the figure below a crowbar is used to lift a weight. If a down ward force of 228 N is applied to the end of the bar, how much weight does the other end bear? The crowbar itself has negligible weight. (Let r1 = 29.0 cm and r2 = 4.70 cm.)
a 146 g ball moving at -23 ms is hit by a bat. the ball moves in the opposite direction at 14 ms. how long did it
It then increases it's speed at the rate of 1.55 m/s2. Find out the magnitude of acceleration under these new conditions. Answer in units m/s2.
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