Questions from College Physics

Q: A 402 kg pile driver is raised 12 m above ground.

A 402 kg pile driver is raised 12 m above ground. (a) How much work must be done to raise the pile driver? (b) How much work does gravity do on the driver as it is raised? (c) The driver is now dro...

Q: A sample containing sulfur (atomic mass 32 u), manganese (

A sample containing sulfur (atomic mass 32 u), manganese (55 u), and an unknown element is analyzed in a mass spectrometer. As in Fig. 19.17(a), the ions move around half a circle before striking a ph...

Q: Show that the time for one revolution of a charged particle moving

Show that the time for one revolution of a charged particle moving perpendicular to a uniform magnetic field is independent of its speed. (This is the principle on which the cyclotron operates.) In do...

Q: Crossed electric and magnetic fields are established over a certain region.

Crossed electric and magnetic fields are established over a certain region. The magnetic field is 0.635 T vertically downward. The electric field is 2.68 × 106 V/m horizontally east. An electron, trav...

Q: A current I = 40.0 A flows through a strip

A current I = 40.0 A flows through a strip of metal. An electromagnet is switched on so that there is a uniform magnetic field of magnitude 0.30 T directed into the page. How would you hook up a voltm...

Q: Sketch some magnetic field lines for two identical bar magnets in the

Sketch some magnetic field lines for two identical bar magnets in the given configuration. Be sure to show field lines inside the magnets as well as outside.

Q: A lid is put on a box that is 15 cm long

A lid is put on a box that is 15 cm long, 13 cm wide, and 8.0 cm tall, and the box is then evacuated until its inner pressure is 0.80 × 105 Pa. How much force is required to lift the lid (a) at sea l...

Q: Sketch some magnetic field lines for two identical bar magnets in the

Sketch some magnetic field lines for two identical bar magnets in the given configuration. Be sure to show field lines inside the magnets as well as outside.

Q: If gear A in Problem 73 has an initial frequency of 0

If gear A in Problem 73 has an initial frequency of 0.955 Hz and an angular acceleration of 3.0 rad/s2, how many rotations does each gear go through in 2.0 s?

Q: Parallel light of wavelength λ strikes a slit of width a at

Parallel light of wavelength λ strikes a slit of width a at normal incidence. The light is viewed on a screen that is 1.0 m past the slits. In each case that follows, sketch the intensity on the scree...