Questions from Modern Physics

Q: One of the tallest buildings in the world is the Taipei 101

One of the tallest buildings in the world is the Taipei 101 in Taiwan, at a height of 1671 feet. Assume that this height was measured on a cool spring day when the temperature was 15.5°C. You could u...

Q: A U.S. penny has a diameter of 1.

A U.S. penny has a diameter of 1.9000 cm at 20.0C. The coin is made of a metal alloy (mostly zinc) for which the coefficient of linear expansion is 2.6 × 10-5 K-1. What would its diameter be on a hot...

Q: The Humber Bridge in England has the world’s longest single span,

The Humber Bridge in England has the world’s longest single span, 1410 m. Calculate the change in length of the steel deck of the span when the temperature increases from -5.0°C to 18.0°C.

Q: You are trying to overhear a juicy conversation, but from your

You are trying to overhear a juicy conversation, but from your distance of 15.0 m, it sounds like only an average whisper of 20.0 dB. How close should you move to the chatterboxes for the sound level...

Q: A copper cylinder is initially at 20.0°C.

A copper cylinder is initially at 20.0°C. At what temperature will its volume be 0.150% larger than it is at 20.0°C?

Q: A cylindrical tank has a tight-fitting piston that allows the

A cylindrical tank has a tight-fitting piston that allows the volume of the tank to be changed. The tank originally contains 0.110 m3 of air at a pressure of 0.355 atm. The piston is slowly pulled out...

Q: An experimenter using a gas thermometer found the pressure at the triple

An experimenter using a gas thermometer found the pressure at the triple point of water (0.01°C) to be 4.80 × 104 Pa and the pressure at the normal boiling point (100°C) to be 6.50 × 104 Pa. (a). Ass...

Q: You live on a busy street, but as a music lover

You live on a busy street, but as a music lover, you want to reduce the traffic noise. (a). If you install special sound reflecting windows that reduce the sound intensity level (in dB) by 30 dB, by...

Q: With the assumption that the air temperature is a uniform 0.

With the assumption that the air temperature is a uniform 0.0°C, what is the density of the air at an altitude of 1.00 km as a percentage of the density at the surface?

Q: At an altitude of 11,000 m (a typical cruising

At an altitude of 11,000 m (a typical cruising altitude for a jet airliner), the air temperature is -56.5°C and the air density is 0.364 kg/m3. What is the pressure of the atmosphere at that altitude...