Helium (density 0.18 kg/m^3 at 0°c and 1 atm pressure) remains a gas until the extraordinarily low temperature of 4.2 k. what is the speed of sound in helium at 8 k?

Explanation:

Molar mass of helium =

for helium is 1.67

The velocity of helium in sound at any temperature is given by

R is a constant 8.314

the answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.