Questions from Modern Physics

Q: In constructing a large mobile, an artist hangs an aluminum sphere

In constructing a large mobile, an artist hangs an aluminum sphere of mass 6.0 kg from a vertical steel wire 0.50 m long and 2.5 × 10-3 cm2 in cross-sectional area. On the bottom of the sphere he atta...

Q: A uniform rod is 2.00 m long and has mass

A uniform rod is 2.00 m long and has mass 1.80 kg. A 2.40-kg clamp is attached to the rod. How far should the center of gravity of the clamp be from the left-hand end of the rod in order for the cente...

Q: A vertical, solid steel post 25 cm in diameter and 2

A vertical, solid steel post 25 cm in diameter and 2.50 m long is required to support a load of 8000 kg. You can ignore the weight of the post. What are (a) the stress in the post; (b) the strain in t...

Q: The bulk modulus for bone is 15 GPa. (a

The bulk modulus for bone is 15 GPa. (a) If a diver-in-training is put into a pressurized suit, by how much would the pressure have to be raised (in atmospheres) above atmospheric pressure to compress...

Q: A solid gold bar is pulled up from the hold of the

A solid gold bar is pulled up from the hold of the sunken RMS Titanic. (a) What happens to its volume as it goes from the pressure at the ship to the lower pressure at the ocean’s surface? (b) The pre...

Q: You freely pivot a horseshoe from a horizontal nail through one of

You freely pivot a horseshoe from a horizontal nail through one of its nail holes. You then hang a long string with a weight at its bottom from the same nail, so that the string hangs vertically in fr...

Q: A specimen of oil having an initial volume of 600 cm3 is

A specimen of oil having an initial volume of 600 cm3 is subjected to a pressure increase of 3.6 × 106 Pa, and the volume is found to decrease by 0.45 cm3. What is the bulk modulus of the material? Th...

Q: In the Challenger Deep of the Marianas Trench, the depth of

In the Challenger Deep of the Marianas Trench, the depth of seawater is 10.9 km and the pressure is 1.16 × 108 Pa (about 1.15 × 103 atm). (a) If a cubic meter of water is taken from the surface to thi...

Q: A copper cube measures 6.00 cm on each side.

A copper cube measures 6.00 cm on each side. The bottom face is held in place by very strong glue to a flat horizontal surface, while a horizontal force F is applied to the upper face parallel to one...

Q: A square steel plate is 10.0 cm on a side

A square steel plate is 10.0 cm on a side and 0.500 cm thick. (a) Find the shear strain that results if a force of magnitude 9.0 × 105 N is applied to each of the four sides, parallel to the side. (b)...