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1. When the 9536Kr nucleus undergoes beta decay, how many protons and neutrons does the daughter nucleus (Rb) contain?
2. The half-life of radium-224 is about 3.6 d. What approximate fraction of a sample remains undecayed after two weeks?
3. How many protons and neutrons does a neutral atom designated as 4018X contain?
4. A drug tagged with 9943Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of the sample was 2.0 x 104 Bq, what is its activity (R) after it has been on the shelf for 1.6 h?
In preparation for a demonstration on conservation of energy, a professor attaches a 7.2-kg bowling ball to a 2.9-m-long rope. Find the force the professor is exerting on the ball
Determine the rate at which the electric field changes between the round plates of a capacitor, 5.6 cm in diameter
the escape speed starting from the surface of the earth is 11.2 km/s(neglecting any effects of the earth's orbital motion, what would be the escape speed from that planet
Determine the magnitude of the butterflys displacement.
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.360mm wide. What is the width of the first bright fringe on either side of the central one
A light spring-gun projectile launcher is mounted on an 0.533 kg air track glider. What is the speed of the air-track glider after the gun is fired
A 2 kg mass is held at rest on top of a frictionless and horizontal table. find the tension of the string which supports the hanging mass
A Mercedes-Benz 300SL (m = 1850 kg) is parked on a road that rises 20° above the horizontal, What is the static frictional force that the ground exerts on the tires
A snowboarder of mass 79 kg travels down the slope of height 150 m, what is the work done on her by friction
Two light sources are used in a photoelectric experiment to determine the work function for a particular metal surface. What stopping potential would be observed when using light from a red lamp (?=668.0nm)
The density of ice is 917 kg/m3 and the density of sea water is 1025 kg/m3. A swimming polar bear climbs onto a piece of floating ice that has a volume of 5.2m3. What is weight of the heaviest bear that the ice can support without sinking complete..
In a location where the speed of sound is 330 m/s, a 2000 Hz sound wave impinges on two slits 30cm apart. At what angle is the first maximum located
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