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Polystyrene (C8H8) has an unknown total mass attenuation coefficient at 1.25 MeV. Its density is 1.040. The total mass attenuation coefficient for water at this energy os 0.0632 cm^2/g. The value o
A uniform rod of length L and mass M is free to rotate about a frictionless pivot at one end as shown in the figure below. The rod is released from rest in the horizontal position. What are the ini
The magnitude of the voltage induced in a conductor moving through a stationary magnetic field depends on the _______ and the _______ of the conductor
How many 1-liter pop bottles would that water fill? Water has a density of 1000 kg/m3. How much mass does the water in the cloud have?
An 8.7 hour trip is made at an average speed of 73.0 km/hr. If the trip was driven at 96.5 km/hr, what was the average speed for the rest of the journey?
How fast should a car move toward you for the car's horn to sound 3.0% higher in frequency than when the car is stationary? The speed of sound is 343 m/s. Give your answer to the nearest 0.1 m/s.
A 0.950 kg air-track glider is attached to each end of the track by two coil springs. It takes a horizontal force of 0.500 N to displace the glider to a new equilibrium position, x= 0.130 m. Find t
A 2.61 kg wood block is launched up a wooden ramp that is inclined at a 26° angle. The block's initial speed is 9.04 m/s. What vertical height does the block reach above its starting point?
A cardinal (Richmondena cardinalis) of mass 3.90×10-2 and a baseball of mass 0.144 have the same kinetic energy. What is the ratio of the cardinal's magnitude of momentum to the magnitude of t
You drive a car 680 ft to the east, then 340 ft to the north. (a) what is the magnitude of your displacement? What is the direction?
A pendulum is made by tying a 490 g ball to a 52.0 cm-long string. The pendulum is pulled 21.0^circ to one side, then released. What is the ball's speed at the lowest point of its trajectory?
What is meant by the wave function of a particle? A beam of electrons passes through a single slit and a beam of protons passes through a second, but identical slit. If the electrons and protons hav
What are the components and length of a vector which is the sum of the two vectors, V1 and V2, whose components are (3.0, 1.5, -15.0) and (4.9, -3.3, 0.0)?
Visible light is incident on a sodium surface in a photoelectric effect experiment. (a) Given the wavelength of visible light is from 380 to 730 nm and the work function of sodium is 2.28 eV,
One travels at 4.01 cm/s and the other at 3.99999 cm/s. When the first one crosses the finish line, how far behind is the second one?
The object to be photographed is 3.89 m in front of the objective lens. How far behind the concave lens should the film be placed?
The water exerts a force of 240 N east. If the boat (including crew) has a mass of 320 kg, what are the magnitude and direction of its acceleration?
Assume that the origin goes through the A particle. The three masses are connected by massless, rigid rods of 50 cm length (center-to-center). If the mass of A is 250 g, the mass of B is 150 g and
You are driving home from school steadily at 100 km/h for 150 km. It then begins to rain and you slow to 61 km/h. You arrive home after driving 3 hours and 40 minutes. How far is your hometown from
Two identical point charges (q = +6.90 x 10-6 C) are fixed at opposite corners of a square whose sides have a length of 0.450 m. A test charge (q0 = -3.20 x 10-8 C), with a mass of 5.20 x 10-8 kg,
During a collision, an 84 kilogram driver of a car moving at 24 meters per second is brought to rest by an inflating air bag in 1.2 seconds. What is the approximate magnitude of the force exerted on
Two children ride on the merry-go-round. Child 1 is 2.0 {rm m} from the axis of rotation, and child 2 is 1.5 {rm m} from the axis. If the merry-go-round completes one revolution every 5.2 s, find t
Two stationary point charges, charge 1 of magnitude 3.45 nC and charge 2 of magnitude 1.60 nC, are separated by a distance of 41.0 cm. An electron is released from rest at the point midway between t
What is the magnitude of the apparent weight of a 83 astronaut 4600 from the center of the Earth's Moon in a space vehicle moving at constant velocity?