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a) What is the ratio of the intensity of an earthquake wave as itpasses a point 20 km from the source tothe intensity as it passes a point 12 kmfrom the source?b) What is the ratio of the amplitude of an earthquake wave as itpasses a point 20 km from the source tothe amplitude as it passes a point 12 kmfrom the source?
A concave spherical mirror has a radius of curvature of magnitude 27.4 cm. determine Is the image real or virtual
A mass of .75 kg oscillates on a light spring, and another .75kg oscillates as the bob of a simple penulum in SHM. If the pendulum length is .3m, what whould be the spring constant of the spring if the periods of oscillation are equal?
A 6.0 ?F capacitor is connected in series with a 4.0 ?F capacitor and a potential difference of 200 V is applied across the pair. What is the potential difference across the 6.0 ?F capacitor
A police officer is investigating the scene of an accident where two cars collided at an intersection. One car with a mass of 1015 kg moving west had collided with a 1300-kg car moving north. The two cars, stuck together, skid at an angle of 30° n..
A 127-turn circular coil of radius 2.09 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coil. Find the magnitude of the average EMF
The cliff divers of Acapulco push off horizontally from rock platforms about 35m above the water, What minimum pushoff speed is necessary to clear the rocks
A 2 200-kg pile driver is used to drive a steel I-beam into the ground. calculate the average force the beam exerts on the pile driver while the pile driver is brought to rest
Two long parallel wires are separated by 3.89 mm. The current flowing in one of the wires (wire 1) is twice that in the other wire (wire 2). If the magnitude of the force on a 1.37 m length of one of the wires is 6.13 ?N, what is the value of the cur..
The mean distance between the earth and the sun is 1.5x1011m. The average intensity of solar radiation incident on the upper atmosphere of the earth is 1390 W/m2. Assuming that the sun emits radiation uniformly in all directions, determine the total ..
A leaf of area 36cm2 and mass 4.8×10?4kg directly faces the Sun on a clear day. The leaf has an emissivity of 0.85 and a specific heat of 0.80 kcal/kg?K. Estimate the rate of rise of the leaf's temperature
Pluto's moon Charon orbits Pluto every 6.4 days with a semimajor axis of 19,700 kilometers. Calculate the combined mass of Pluto and Charon
A block of mass m is attached to a spring (spring constant k)which is attached to a wall, find the amplitude of the resulting simple harmonic motion?
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