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A sample contains radioactive atoms of two types, A and B. Initially there are three times as many A atoms as there are B atoms. Two hours later, the numbers of the two atoms are equal. The half-life of A is 0.72 hours. What is the half-life of B?
What will be the equilibrium temperature while a 238 block of copper at 230 is placed in a 133 aluminium calorimeter cup containing 831 of water at 16.0.
A black furnace of surface area A = 3.0 m2 is fired up. Its outside temperature reaches 450oC. Calculate the net loss of power (in watts) by the furnace
The particles in the nucleus of an atom are approximately 1.00×10?15 apart, while the electrons in an atom are about 1.00×10?10 from the nucleus. How many pounds would the force be
At Sea World, a 28.0-kg seal slidesdown a ramp into the pool below. What is the coefficient of kinetic friction between the sealand the ramp
A capacitor is connected across the terminals of an ac generator that has a frequency of 440 Hz and supplies a voltage of 24 V. When a second capacitor is connected in parallel with the first one, the current from the generator increases by 0.18 A. D..
Block A, with a mass of 2.4 kg, is stationary, while block B, with a mass of 8.6 kg, is moving at 8.1 m/s. What is the speed of the center of mass of this two-block system
An auto race takes place on a circular track. A car completes one lap in a time of 19.5 s, Find the average angular speed and the radius of the track
q1. over a 30-day period a power plant generates an average of 751 mw of electrical power and 1225 mw of waste heat and
q1. for years marine scientists were mystified by sound waves picked up by underwater microphones in the pacific ocean.
Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the man is 79 kg, Determine the acceleration of the woman
Mars travels at an average speed of 2.41×104 m/s around the Sun, and takes 5.94×107 s to complete one revolution. How far is Mars from the Sun
Monochromatic light falling on two slits 1.9×10?2mm apart produces the fifth-order fringe at an 8.9? angle
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