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Carbon-14 has a half-life of 5,730 years. If an archaeological sample has only one-fourth of the radioactivity of a similar sample from today, how old is the archaeological sample? Give your answer in years.
A solid block of copper (p = 8920 kg/m^3) with a volume of 0.2 m^3 is submerged in water. What is the buoyancy force on the block
Describe "acceptance ratio" as a percentage of accepted trials. Simulation shows that acceptance ratio is higher on higher temperature (behave as increasing function of temperature).
A 27.0-kg child on a 1.00-m-long swing is released from rest when the ropes of the swing make an angle of 25.0° with the vertical. (a) Neglecting friction, find the child's speed at the lowest position. m/s (b) If the actual speed of the child at the..
Block Sliding into Spring A block of mass m = 5.5 kg is released from rest at a height of H = 3.0 m on a curved frictionless ramp. What is the maximum height reached by the block
Point charges of -8.20 μC are located at each corner of a square that is 0.250 meter on a side. Obtain the electric potential at the center of a square
Two airplanes leave an airport at the same time. The velocity of the first airplane is 730 m/h at a heading of 20.5 degrees. How far apart are they after 2.5h
A superconducting solenoid has 3042.7turns/m and carries a current of 2000 Amp. Find the magnetic field generated inside the solenoid
An ?-particle has a charge of +2e and a mass of 6.64 10-27 kg. It is accelerated from rest through a potential difference that has a value of 1.38 106 V, What is the speed of the ?-particle
An 85-kg jogger is heading due east at a speed of 1.9 m/s. A 55-kg jogger is heading 24° north of east at a speed of 3.8 m/s. Find the magnitude and direction of the sum of momenta of the two joggers.
The combination of an applied force and a friction force produces a constant total torque of 36.5 N•m on a wheel rotating about a fixed axis. Obtain the magnitude of the torque due to friction
Find out the minimum values of m1 and m2 such that the overlapping of the bright fringes will occur and find position of the overlap on screen.
Imagine you are on a cart that rests on a frictionless surface (you + car = 100 kg) with 30 basketballs (1 kg each). how fast in m/s are you going
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