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An object is in front of a converging lens (f = 0.40 m). The magnification of the lens is m = 2.1. Relative to the lens, through what distance should the object be moved so that the magnification changes to m = -2.1?
A typical wall outlet voltage is 120 volts in the United States. Personal MP3 players require much smaller voltages, calculate the number of turns on the secondary coil of the adapter transformer
A ship is heading off to Barnard's star at 0.700c. When it passed a space station(at rest with respect to the Earth) few days out from Earth, determine the direction and speed of each torpedo as seen by the station
radiation from a star reaches a planet's surface at an average rate of 2700 w/m^2, Find the force exerted on a roof that has dimensions 10x20 m
A uniform disk with mass 39.5kg and radius 0.250 m is pivoted at its center about a horizontal, frictionless axle that is stationary. What is the magnitude a of the resultant acceleration of a point on the rim of the disk
The wave function for a traveling wave on a taut string is (in SI units) y(x,t) = 0.380 sin (12?t ? 1?x + ?/4), find the maximum transverse speed of an element of the string
in a single slit experiment, the distance between two dark fringes of the second order is 10 cm on a screen which is 1.5 m away. find the width of the slit
A circular coil having an area of 24 cm^2 is plaved in a uniform magnetic field of 0.60T, which is derected vertically upward. Find the magnitude of the magnetic flux contained in the coil
What is the piston height if the temperature is 30C. How far apart are the plates if there's air between them.
At T = O degrees Celsius and p = 1000mb, 1g of dry air receives during an isochoric process an amount of heat. It is then observed that its pressure increases by 50mb. What is the change of temperature of the air and what is the amount of heat absorb..
A commercial airliner is undergoing its initial ascent while the pilot maintains a cabin environment of T = 23 C, r = 0.35, and p = 880 hPa. At the 670 hPa level an exit door ruptures and cabin pressure rapidly decompresses. Will clouds form in the c..
Four point charges have the same magnitude of 2.8 x 10^-12 C and are fixed to the corners of a square that is 7.1 cm on a side. Determine the magnitude of the net electric field
Suppose now that you are at rest relative to the raft standing at the rear end except this time the raft is in the middle of the lake moving at a speed of 4.0 m/s. find the raft's speed relative to a stationary observer
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