Questions from College Physics

Q: Figure P13.74 shows a crude model of an insect wing

Figure P13.74 shows a crude model of an insect wing. The mass m represents the entire mass of the wing, which pivots about the fulcrum F. The spring represents the surrounding connective tissue. Motio...

Q: A 2.00 - kg block hangs without vibrating at the

A 2.00 - kg block hangs without vibrating at the end of a spring (k = 500. N/m) that is attached to the ceiling of an elevator car. The car is rising with an upward acceleration of g/3 when the accele...

Q: A system consists of a vertical spring with force constant k =

A system consists of a vertical spring with force constant k = 1250 N/m, length L = 1.50 m, and object of mass m = 5.00 kg attached to the end (Fig. P13.76). The object is placed at the level of the p...

Q: A block of mass m = 2.00 kg is attached

A block of mass m = 2.00 kg is attached to a spring of force constant k = 5.00 x 102 N/m that lies on a horizontal frictionless surface as shown in Figure P13.8. The block is pulled to a position xi =...

Q: A slingshot consists of a light leather cup containing a stone.

A slingshot consists of a light leather cup containing a stone. The cup is pulled back against two parallel rubber bands. It takes a force of 15.0 N to stretch either one of these bands 1.00 cm. (a) W...

Q: Suppose you hear a clap of thunder 16.2 s after

Suppose you hear a clap of thunder 16.2 s after seeing the associated lightning stroke. The speed of light in air is 3.00 x 108 m/s. (a) How far are you from the lightning stroke? (b) Do you need to k...

Q: A person standing 1.00 m from a portable speaker hears

A person standing 1.00 m from a portable speaker hears its sound at an intensity of 7.50 x 10-3 W/m2. (a) Find the corresponding decibel level. (b) Find the sound intensity at a distance of 35.0 m, as...

Q: The mating call of a male cicada is among the loudest noises

The mating call of a male cicada is among the loudest noises in the insect world, reaching decibel levels of 105 dB at a distance of 1.00 m from the insect. (a) Calculate the corresponding sound inten...

Q: A bimetallic strip of length L is made of two ribbons of

A bimetallic strip of length L is made of two ribbons of different metals bonded together. (a) First assume the strip is originally straight. As the strip is warmed, the metal with the greater average...

Q: The intensity level produced by a jet airplane at a certain location

The intensity level produced by a jet airplane at a certain location is 150 dB. (a) Calculate the intensity of the sound wave generated by the jet at the given location. (b) Compare the answer to part...