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A Geiger counter registers a count rate of 5,200 counts per minute from a sample of a radioisotope. Fourteen minutes later, the count rate is 1,300 counts per minute. What is the half-life of the radioisotope?
Water is contained in a large tower that supplies a city. If the top of the water is 30 m above an outlet at the base of the tower, what maximum velocity can be expected at the outle.
A horizontal force of with a magnitude of F = 220 N is applied to block 1, What is the magnitude of the net force on the middle block
A +10 nC charge is placed on the x-axis at x= -6cm. A +8 nC charge is placed 14cm away on the x-axis at x= +8 cm. A) find the potential at the origin
Consider a thin, uniform rod of mass m and length L (and negligible other dimensions) lying on the x axis (from x=-L to 0). Derive a formula for the gravitational ?eld “g” at any arbitrary point x to the right of the origin (but still on the x-axi..
While standing at the edge of the roof of a building, you throw a stone upward with an initial speed of 7.19 m/s. How much time is the stone in the air
A cylinder 10 m high, with a cross-sectional area of 0.1 m2, has a mass-less piston at the bottom with water at 20 degrees Celsius on top of it. Find the total heat transfer to the air when all of the water has been pushed out
Consider the elastic collision of an argon atom and an O2 molecule at room temperature and atmospheric pressure. what are their outgoing velocities
How far is he from the orgin. A simple pendulum has a mass of 0.350 kg and a length of 2.00 m. It is displaced through an angle of 7.0° and then free.
The angular momentum of a flywheel having a rotational inertia of 0.100 kg·m2 about its central axis decreases from 3.00 to 0.400 kg·m2/s in 0.80 s. What is the average power of the flywheel
Rubbing your hands together warms them by converting work into thermal energy. What is the temperature increase
Capacitors C1 = 5.0 µF and C2 = 2.0µF are charged as a parallel combination across a250 V battery. Calculate the resulting charge on each capacitor
An electric field of 350000 N/C points due west at a certain spot. What is the magnitude of the force that acts on a charge of -9.9C at this spot?
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