Physics of Matter

A jet flies at an altitude of 15,000m. What is the approximate air pressure at that height?

Temperature and Heat

A copper vat is 10 meters long at room temperature(20 degrees Celcius). How much longer is it when it contains boiling water under 1 atm pressure?

Temperature and Heat

A brick oven 2 meters long at 20 degrees celsius is designed to allow for an expansion of 5mm without damage. To what temperature would the oven have to be heated to expand that much?

Temperature and Heat

A bottle containing 3kg of water at a temperature of 20 degrees Celsius is placed in a refrigerator where the temperature is kept at 3 degrees Celsius. How much heat is transferred from the water to cool it to 3 degrees Celsius?

Temperature and Heat

On a hot day, the temperature is 35 degrees Celsius and the relative humidity is 77%. What is the humidity?

Waves and Sound

The force stretching the D string on a guitar is 150N. The string's linear mass density is 0.005 kg/m. What is the speed of the waves on the string?

Waves and Sound

The coldest and hottest temperatures recorded are: 134 degrees Farhenheit and -80 degrees Farhenheit. What is the speed of sound in air at each temperature?

Waves and Sound

A 500Hz sound travels through pure oxygen. The wavelength of the sound is measured to be 0.65m. What is the speed of sound in oxygen?

Waves and Sound

What frequency of sound traveling in air at 20 degrees Celsius has a wavelength equal to 1.7m, the average height of a person?

Waves and Sound

What is the wavelength of 3.5 million Hz ultrasound as it travels through human tissue?