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Two train whistles, A and B, each have a frequency of 392 Hz. A is stationary and B is moving toward the right (away rom A) at a speed of 35.0 m/s. A listener is between the two whistles and is moving toward the right with a speed of 15.0 m/s. No wind is blowing.
a) what is the frequency from A as heard by the listener?
b) what is the frequency from B as heard by listener?
c) what is the beat frequency detected by the listener?
Two equal forces are applied to a door. The first force is applied at the midpoint of the door; the second force is applied at the doorknob. Which force exerts the greater torque
Two equally charged insulating balls each weigh 0.50 g and hang from a common point by identical threads 30 cm long, What is the magnitude of the charge on each ball
A mixture of iron and an unknown material is bombarded with electrons. What is the unknown material (use chemical symbol)
Calcium carbonate, CaCo3, can be in two different solid phases, calcite or aragonite. Which phase is more stable at room temp? At what pressure are both phases stable?
The spin cycles of a washing machine have two angular speeds, 409rev/min and 608rev/min . The internal diameter of the drum is 0.610m. Find the laundry's maximum tangential speed
When mass M is tied to the bottom of a long, thin wire suspended from the ceiling, the wire's second-harmonic frequency is 150Hz . Adding an additional 1.5kg to the hanging mass increases the second-harmonic frequency to 270Hz.
A(n) 331 g object is attached to a spring and executes simple harmonic motion with a period of 0.294 s. The total energy of the system is 1.7J. Find the force constant of the spring. (N/m) Find the amplitude of the motion (in cm)
A particle of mass m1 = 3.74kg is traveling in the positive x-direction with a velocity of 17.5m/s. What is the angle that the new trajectory makes with the x-axis
By what distance has the proton been deflected sideways when it reaches the far edge of the capacitor. Assume the field is uniform inside the capacitor and zero outside the capacitor.
Consider a system of 12 particles with two energy levels. Plot the number of microstates corresponding to each value of the total energy if (a) the particles are indistinguishable and (b) if the particles are distinguishable.
The cathode-ray tubes that generated the picture in early color televisions were sources of x rays. what are the shortest-wavelength x rays produced by the television
q1. a car accelerates from 17 m s1to 31 m s-1 with a uniform acceleration of 2.5 m s-2. calculate the displacement of
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