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a. What happens to a radioactive isotope over the course of 1 half-life?
b. How does the half-life of an isotope relate to the stability of its nucleus?
During a circus performance, a 70.3-kg human cannonball is shot out of an 15.4-m-long cannon. determine the average net force exerted on him in the barrel of the cannon
a ferry boat transports tourists among three islands. it sails from the first island to the second island 4.76 km away
A "moving sidewalk" in an airport terminal building moves at a speed of V0 and is of length L. A woman steps on at one end and walks at speed V relative to the moving sidewalk. How much time does she need to walk from one end to the other if she walk..
What force must be applied to a small cylinder piston with a diameter of 0.32 m to lift a car weighing 12,000N that is supported by the piston in a large cylinder that has a diameter of 1.4m?
An RLC circuit consists of a 863 ? resistor, a 49 µF capacitor, and a 265 mH inductor, connected in series with a 78.2 V, 96 Hz power supply. What is the phase angle between the current and the applied voltage? Answer between -180? and +180?
an elevator cabin has a mass of 358.1 kg and the combined mass of the people inside the cabin is 165.3 kg. the cabin is
Assuming frictionless conditions, a table has a hanging mass, m1, over a pulley at the left side and another hanging mass, If m1 = .45kg, & m2 = .3kg, & m3 = .25kg what is the new accelration of the system
A small airplane accelerates from rest at a constant acceleration of 1.2 m/s^2 along the runway. How long did this take
An electron accelerated from rest through a voltage of 350V enters a region of constant magnetic field. If the electron follows a circular path with a radius of 28cm, what is the magnitude of magnetic field.
Use the Bohr model to address this question. When a hydrogen atom makes a transition from the 7th energy level to the 2nd, counting the ground level as the first, what is the energy of the emitted photon? Express the answer in electron volts.
A duck is floating on a lake with 25 percent of its volume beneath the water. Find what is the average density of the duck
three charges each of magnitude 8 nc are at separate corners of a square of edge length 2 cm. the two charges at
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