Questions from Modern Physics

Q: The wings of the blue-throated hummingbird (Lampornis clemenciae),

The wings of the blue-throated hummingbird (Lampornis clemenciae), which inhabits Mexico and the southwestern United States, beat at a rate of up to 900 times per minute. Calculate (a) the period of v...

Q: A 50.0-g hard-boiled egg moves on

A 50.0-g hard-boiled egg moves on the end of a spring with force constant k = 25.0 N/m. Its initial displacement is 0.300 m. A damping force Fx = -bvx acts on the egg, and the amplitude of the motion...

Q: An unhappy 0.300-kg rodent, moving on the

An unhappy 0.300-kg rodent, moving on the end of a spring with force constant k = 2.50 N/m, is acted on by a damping force Fx = -bvx. (a) If the constant b has the value 0.900 kg>s, what is the freque...

Q: A mass is vibrating at the end of a spring of force

A mass is vibrating at the end of a spring of force constant 225 N/m. Figure E14.62 shows a graph of its position x as a function of time t. (a) At what times is the mass not moving? (b) How much ener...

Q: A sinusoidally varying driving force is applied to a damped harmonic oscillator

A sinusoidally varying driving force is applied to a damped harmonic oscillator of force constant k and mass m. If the damping constant has a value b1, the amplitude is A1 when the driving angular fre...

Q: Figure E15.35 shows two rectangular wave pulses on a stretched

Figure E15.35 shows two rectangular wave pulses on a stretched string traveling toward each other. Each pulse is traveling with a speed of 1.00 mm/s and has the height and width shown in the figure. I...

Q: A 2.40-kg ball is attached to an unknown

A 2.40-kg ball is attached to an unknown spring and allowed to oscillate. Figure E14.7 shows a graph of the ball’s position x as a function of time t. What are the oscillationâ...

Q: In a physics lab, you attach a 0.200-

In a physics lab, you attach a 0.200-kg air-track glider to the end of an ideal spring of negligible mass and start it oscillating. The elapsed time from when the glider first moves through the equili...

Q: When a body of unknown mass is attached to an ideal spring

When a body of unknown mass is attached to an ideal spring with force constant 120 N/m, it is found to vibrate with a frequency of 6.00 Hz. Find (a) the period of the motion; (b) the angular frequency...

Q: A student wrote: “The only reason an apple falls downward

A student wrote: “The only reason an apple falls downward to meet the earth instead of the earth rising upward to meet the apple is that the earth is much more massive and so exerts a much greater pul...