Questions from College Physics

Q: A tiny hole is made in the center of the negatively and

A tiny hole is made in the center of the negatively and positively charged plates of a capacitor, allowing a beam of electrons to pass through and emerge from the far side. If 40.0 V are applied acros...

Q: An apparatus is designed to study insects at an acceleration of magnitude

An apparatus is designed to study insects at an acceleration of magnitude 980 m/s2 (= 100g). The apparatus consists of a 2.0 m rod with insect containers at either end. The rod rotates about an axis p...

Q: A certain fixed length L of wire carries a current I.

A certain fixed length L of wire carries a current I. (a) Show that if the wire is formed into a square coil, then the maximum torque in a given magnetic field B is developed when the coil has just o...

Q: A number of wires carry currents into or out of the page

A number of wires carry currents into or out of the page as indicated in the figure. (a) Using loop 1 for Ampere's law, what is the net current through the interior of the loop? (b) Repeat for loop...

Q: An object connected to an ideal spring is oscillating without friction on

An object connected to an ideal spring is oscillating without friction on a horizontal surface. Sketch graphs of the kinetic energy, potential energy, and total energy as functions of time for one com...

Q: An astronaut has spent a long time in the International Space Station

An astronaut has spent a long time in the International Space Station (ISS) traveling at 7.66 km/s. When he returns to Earth, he is 50 ms younger than his twin brother. How long was he on the ISS? [Hi...

Q: Suppose your handheld calculator will show six places beyond the decimal point

Suppose your handheld calculator will show six places beyond the decimal point. At what minimum speed would an object have to be traveling so that gamma can be seen to be different from 1 on your calc...

Q: The George Washington Bridge crosses the Hudson River between New York and

The George Washington Bridge crosses the Hudson River between New York and New Jersey. The span of the steel bridge is about 1.6 km. If the temperature can vary from a low of −15°F in winter to a high...

Q: The coefficient of linear expansion of brass is 1.9 ×

The coefficient of linear expansion of brass is 1.9 × 10−5 °C−1. At 20.0°C, a hole in a sheet of brass has an area of 1.00 mm2. How much larger is the area of the hole at 30.0°C?

Q: (a) Write an equation for a surface seismic wave moving

(a) Write an equation for a surface seismic wave moving in the −x- direction with amplitude 2.0 cm, period 4.0 s, and wavelength 4.0 km. Assume the wave is harmonic, x is measured in meters, and t is...