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A radiation detector is in the form of a circular disc of diameter3.0 cm. It is held 25cm from a source of radiation, where itrecords 1250 counts per second. Assuming that the detector records every radiation incident upon it, find the activity of the sample(in curies).
A light year is defined as the distance light can travel at 3 x 108 m/s in one year (365 days). How far is one light year in kilometers
A pump on the ground floor of a building can pump up water to fill a tank of volume 30 m^3 in 15 min. If the tank is 40m above the ground and the efficiency of the pump is 30%
The author's cat enjoys chasing chipmunks in the front yard.
Two coils are wound around the same cylindrical form. When the current in the first coil is decreasing at a rate of -0.240 A/s , What is the mutual inductance of the pair of coils
A glass sheet 1.10 ?m thick is suspended in air. Calculate the minimum value of the index of refraction of the glass sheet that produces this effect
A flagpole of length 9 m and mass 35 kg is hinged at one end, where it is connected to a wall as sketched below. The pole is held up by a cable attached to the end. Find out the tension in the cable. (Assume the flagpole has an uniform mass distr..
A segment of wire carries a current of 20 A along the y-axis from y = 2.0 to y =0 and then along the x axis from x = 0 to x =-4.0 m. What is the magnitude of the force on this segment of wire
If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 2.4 s
a 71 tall graduated cylinder is filled with 21 of glycerin density 1260 and 50 of water. find the pressure difference
You are holding a conducting loop of copper and looking at its circle. Behind it is a long current-carrying wire carrying the current from left to right. what is the direction of current flow if any
Two blocks of masses m1 and m2 are connected by an ideal string passing over an ideal pulley. Find a relation between the variables that would guarantee that the block is initially slowing down
a beam of laser light with wavelength 612 nm is directed through a slab of glass having index of refraction 1.5.a for
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