Questions from College Physics

Q: The particle has a total mechanical energy of −100 J.

The particle has a total mechanical energy of −100 J. At time t = 0, the particle is located at x = 8.0 cm and is moving to the left. (a) What is the particle’s potential energy at t = 0? What is its...

Q: A model sailboat is slowly sailing west across a pond at 0

A model sailboat is slowly sailing west across a pond at 0.33 m/s. A gust of wind gives the sailboat a constant acceleration of 0.30 m/s2 directed 28° south of west during a time interval of 2.0 s. (...

Q: Two vectors, each of magnitude 4.0 cm, are

Two vectors, each of magnitude 4.0 cm, are inclined at a small angle a below the horizontal as shown. Let /. Sketch the direction of / and estimate its magnitude.

Q: Answer the questions in Problem 121 for a particle with total mechanical

Answer the questions in Problem 121 for a particle with total mechanical energy +100 J initially moving to the left at x = 15.0 cm.

Q: Why do some telescopes produce an inverted image?

Why do some telescopes produce an inverted image?

Q: Using Faraday’s law, explain why it is impossible to have a

Using Faraday’s law, explain why it is impossible to have a magnetic wave without any electric component.

Q: Six copper wires are characterized by their dimensions and by the current

Six copper wires are characterized by their dimensions and by the current they carry. Rank the wires in order of decreasing drift velocity. (a) diameter 2 mm, length 2 m, current 80 mA (b) diameter 1...

Q: The fundamental frequency of the highest note on the piano is 4

The fundamental frequency of the highest note on the piano is 4.186 kHz. Most musical instruments do not go that high; only a few singers can produce sounds with fundamental frequencies higher than ar...

Q: A lead rod and a common glass rod both have the same

A lead rod and a common glass rod both have the same length when at 20.0°C. The lead rod is heated to 50.0°C. To what temperature must the glass rod be heated so that they are again at the same length...

Q: When a block is suspended from a vertically hanging spring, it

When a block is suspended from a vertically hanging spring, it stretches the spring from its original length of 4.5 cm to a total length of 6.0 cm. The spring with the same block attached is then plac...