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What is the saturation activity of 24Na that can be induced in a 400 g sample of NaCl with a constant thermal-neutron fluence rate of 5 x 1010 cm-2 sec-1?
The isotope 23Na is 100% abundant and has a thermal-neutron capture cross section of 0.53 barns.
A 2.00-m tall basketball player is standing on the floor 10.0 m from the basket. If he shoots the ball at a 30 degree angle from the horizontal, at what initial speed must he throw the ball so that it goes through the basket without striking the back..
A box is sliding with a speed of 4.50 m/s on a horizontal surface when, at point P, it encounters a rough section. What is the coefficient of friction at the stopping point
A spherical metallic Christmas tree ornament has a diameter of 6.41 cm. If Saint Nicholas is by the fireplace, 1.37 m away, where will he see his reflection in the ornament
A total of 31 bright and 31 dark Newton's rings (not countingthe dark spot at the center) are observed when 550 nm light fallsnormally on a planoconvex lens resting on a flat glass surface. How much thicker is the center than the edges
A ball is thrown straight upwards from the roof of a tall building. The building is 60.0 m high. find the velocity of the ball right before it hits the ground
Filament is heated to 2000K and is a blackbody of area 1cm^2. Thermal power radiated is 90.7 W. At what wavelength is it peaked
A light, flexible cable is wrapped around a solid cylinder with mass 3.5 kg and radius 0.8 meters.
A spring-loaded catapult has a spring with spring constant 500 N/m. When loaded, the spring is compressed a distance of .20m. how high will the pellet rise before falling back down
A gry is an old English measure for length, defined as 1/10 of a line, where line is another old English measure for length, defined as 1/12 inch. A common measure for length in publishing business is a point, defined as 1/72 inch. What is an area..
One of the fastest recorded pitches in major-league baseball, thrown by Tim Lincecum in 2009, how far would the ball fall vertically by the time it reached home plate, 60.5 ft away
A blow-dryer and a vacuum cleaner each operate with a voltage of 120 V. The current rating of the blow-dryer is 9 A, and that of the vacuum cleaner is 5.5 A. Determine the power consumed by the vacuum cleaner.
A 0.2kg rock attachedd to a horizontal springg of spring constant k=200N/m is placed on a horizontal, frictionless surface. what is the amplitude of motion for the rock
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