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An earthquake emits both P-waves and S-waves that travel at different speeds through the Earth. A Pwave travels at 8 000 m/s and an S-wave at 4 000 m/s. If P-waves are received at a seismic station 30.0 s before an S-wave arrives, how far is the station from the earthquake center?
q1. a box of mass 32 kg is at rest on a horizontal frictionless surface. a constant horizontal force then acts on the
In effect, the first circular dark fringe in the diffraction pattern defines the size of the central bright spot on the moon. find the diameter (not the radius) of the central bright spot on the moon.
Body fat has an energy content of about 38,000 Joules per gram. Suppose your weight has been constant, how much weight will you have gained
A new plant oil is discovered that is easy to recover from the plant and it might be a useful fuel. A question is the energy density of the fuel. Calculate the energy-density of this "new fuel"
Two small metallic spheres, each of mass m = 0.40 g, are suspended as pendulums by light strings from a common point, what is the magnitude of the charge on each sphere
An ion with charge q is distance r from a molecule with polarizability (alpha). Find an expression for the magnitude force F
Starting from rest, a 12-cm-diameter compact disk takes 3.3s to reach its operating angular velocity of 2500rpm. How much torque is applied to the disk
A single circular loop of radius 0.53 m carries a current of 3.2 A in a magnetic field of 0.95 T. What is the maximum torque exerted on this loop
A brass plate measures 30 cm by 40 cm. The coefficient of linear thermal expansion is 19.0 10-6/°C. If the temperature of the plate is increased by 10.0 K, next what is the increase in the area of the plate? a) 0.350 cm2 b) 0.404 cm2 c) 0.456 cm2 ..
The pressure in an automobile tire is usually quoted (in the United States) in pounds per square inch (lb/in2), What is the value of the gauge pressure in Pascals
The planes of atoms in a cubic crystal lie parallel to the surface, 0.74 nm apart. X rays having wavelength 0.40 nm are directed at an angle theta to the surface.
A silicon sample is doped with phosphorus at 1.23 parts per million. Phosphorus acts as an electron donor, Calculate the number of free electrons per unit volume of the doped silicon.
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