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Suppose that 40 grams of a radioactive isotope is discovered to have 1.25 grams remaining after 24 hours. What is the half-life of this isotope? Show your work to receive full credit for this problem.
If a supersonic jet traveling at Mach 3 atan altitude of 20 000 m is directly overhead at time=0, Where will the plane be when it is finally heard
A spherical mirror has a focal length of 10cm. Locate and describe the image for an object distance of 25cm.
The prong of a tuning fork moves back and forth when it is set into vibration. what are the maximum velocity and the maximum acceleration of the prong
A Chevrolet Corvette convertible can brake to a stop from a speed of 60.0 mi/h in a distance of 123 ft on a level roadway. What is its stopping distance on a roadway sloping downward at an angle of 40.0°
A basketball player with a body weight of 850 N exerts a force of -4500 N against the ground during takeoff (jumping upward). How much force does the ground exert on the basketball
In a particular beta-minus decay of a free neutron (that is, one not part of an atomic nucleus), the emitted electron has exactly the same kinetic energy as the emitted electron antineutrino. What is the value, in MeV, of that kinetic energy? Assume ..
An applied force F1= 16N acting on an object with the mass m = 2 kg which is moving on the surface of a table. find the coefficient of friction between the object and the table
Two aluminum wires have the same resistance. If one has twice the length of the other, what is the ratio of the diameter of the longer wire to the diameter of the shorter wire
A metal wire of mass m can slide without friction on two parallel, horizontal, conducting rails. find its velocity as a function of time
Sitting has a metabolic rate of 50 Cal/hr m2. Assume that each beer was Sierra Nevada Pale Ale, 175 Cal per beer, their surface area is a constant 1.7 m2, and that the added weight would be fat. This fat has no water content. How much mass have th..
A 1000 kg aircraft going 25 m/s collides with a 1500 kg aircraft that is parked and they stick together after the collision and are going 10 m/s after the collision
A baseball player friend of yours wants to determine his pitching speed. You have him stand on a ledge and throw the ball horizontally from an elevation 3.0m above the ground, What is his pitching speed
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