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A 43 mg sample of pure gold (197Au) is irradiated in a reactor with a steady neutron flux of 5*10^10 neutrons/s-cm^2 long enough for the 197Au activity to saturate. What is the activity level in decays/s immediately after it is removed from the reactors? The cross section for neutron absorption on 197Au is 98.8 barns. Give your in disintergrations/second but do not include units.
q1. monochromatic light from a distant source is incident on a slit 0.750 rm mm wide. on a screen 2.00 rm m away the
You are given a slide with two slits cut into it and asked how far apart the slits are. You shine white light on the slide, What is the separation of the two slits
You attach a meter stick to an oak tree, such that the top of the meter stick is 2.67 meters above the ground. how high above the ground was the acorn before it fell
A 2.0 kg block slides on a frictionless 25o inclined plane. What are the magnitude and direction of the block's acceleration
A 1.2 kg brick is held a distance of 2 m above a manhole and then dropped. What is the change in potential energy
An automobile engine slows down from 4260 rpm to 1080 rpm in 2.99 s. Calculate the total number of revolutions the engine makes in this time. Do not enter unit
The space shuttle performs a retro burn for 3.5min to go from an orbital velocity of 17,500mph to re-entry velocity of 5000mph.
An electromagnetic flowmeter is used to meausre blood flow rates during surgery. Which of the two leads is at the higher potential
An electron is brought to a point 0.2m from the center of a conducting sphere of radius 0.1m carrying a charge of 4.0x10^-6 C, What is the force acting on the electron
A woman finds the front windshield of her car covered with ice at -12.0 °C. How much heat is required to melt the ice
A 0.271 kg bead slides on a curved wire, starting from rest at point A as shown in the figure. The acceleration of gravity is 9.8 m/s2 . If the wire is frictionless, find the speed of the bead at B. Find the speed of the bead at C. A5.58 m B C1.09 m
The small piston of a hydraulic lift has a cross-sectional area of 3 cm2, and its large piston has a cross-sectional area of 200 cm2. What force should be applied to the small piston for the lift to raise a load of 15kN
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