Muons are cosmic particles generated in the upper part of th…

Muons are cosmic particles generated in the upper part of the atmosphere. Their mean lifetime, in the reference frame of the muon, is 2.2 × 10–6 s. Now, assume a muon travelling with a speed of 0.6c relative to an observer on Earth. What would be the approximate distance this muon travels, according to the observer?  

An instructor is showing the standing waves demo in the clas…

An instructor is showing the standing waves demo in the class. A 4.00-m long string, clamped at both ends, vibrates with a frequency of 200 Hz. On the string, the students can clearly see a standing wave with six segments. What is the speed of transverse waves on the string?

On a cold winter day, the outside temperature is –5.0 °C whi…

On a cold winter day, the outside temperature is –5.0 °C while the interior of a well-insulated garage is maintained at 20.0 °C by an electric heater.  Assume the walls have a total area of 75 m2, a thickness of 0.15 m, and a thermal conductivity of 0.042 W/(m · C°).  What is the cost to heat the garage for six hours at these temperatures if the cost of electricity is $ 0.11/kWh?  Note: 1 kWh = 3.6 × 106 J.