Physics Heat & Thermodynamics Level: High School
How many helium molecules are there in the tank if it is filled at 20 degree C to a gauge pressure of 12.7 atm ?
Physics Heat & Thermodynamics Level: High School
A scuba tank has a volume of 3800 cm^3.For every deep dives , the tank is filled with 50 percent (by volume ) pure oxygen and 50 percent pure helium . How many oxygen molecules are there in the tank if it is filled at 20 degreeC to a gauge pressure of 12.7 atm ?
Physics Heat & Thermodynamics Level: High School
What would be the rms speed of a protein of molecular mass 59900 u at 36.5 degree C ?
Physics Heat & Thermodynamics Level: High School
Calculate the approximate rms speed of an amino acid whose molecular mass is 95.0 u in a living cell at 36.5 degree C ?
Physics Heat & Thermodynamics Level: High School
Calculate the mass speed of helium atoms near the surface of the sun at a temperature of about 6450 K .
Physics Heat & Thermodynamics Level: High School
A tire is filled with air at 16.2 degreeC ato a gauge pressure of 221 kPa. If the tire reaches a temperature of 38.4 degree C . What fraction of the original air must be removed if the original pressure of 221 KPa is to be maintained ?
Physics Heat & Thermodynamics Level: High School
A storage tank contains 21.7 kg of nitrogen (N2) at an absolute pressure of 3.90 atm . What will the pressure be if the nitrogen is replaced by an equal mass of CO2 ?
Physics Heat & Thermodynamics Level: High School
What percent error is made in each if a person forgets to change degree C to K ?Do not enter units , and enter the size of the error as a positive number .
Physics Heat & Thermodynamics Level: High School
Typical temperatures in the interior of the Earth and Sun are about 3800 degree C and 1.45 x 10^7 degree C , respectively . What are these temperatures in Kelvin ? Do not enter units .
Physics Heat & Thermodynamics Level: High School
The pendulum in a grandfather clock is made of brass and keeps perfect time at 18.1 degreee C . How much time is gained or lost in a year if the clock is kept at 24.5 degree C ?Assume the frequency dependence on length for a simple pendulum applies. Enter a positive number for a gain , a negative number for a loss .
Physics Heat & Thermodynamics Level: High School
A brass plug is to be placed in a ring made of iron. At room temperature , the diameter of the plug is 8.303 cm and that of the inside of the ring is 8.300 cm . They must both be brought to what common temperature (in degree C) in order to fit ?
Physics Heat & Thermodynamics Level: High School
What is the most likely material of the container ? (Choose from aluminum, brass, copper, steel, glass, or Pyrex .)Physics Heat & Thermodynamics Level: High School
It is observed that 63.1 mL of water at 20.8 degreeC completely fills a container to the brim . When the container and water are heated to 55.8 degreeC , 0.296 g of water is lost . What is the coefficient of volume expansion of the container (in degree C^-1)?Density of water at 55.8 degreeC is 0.98411 g/mL. Do not enter units .
Physics Heat & Thermodynamics Level: High School
What is the temperature in Celsius if the column has length 18.0 cm ?
Physics Heat & Thermodynamics Level: High School
In an alcohol-in-glass thermometer , the alcohol column has length 7.69 cm at 0.00 degreeC and length 24.4 cm at 100 degreeC . What is the temperature in Celsius if the column has length 12.6 cm ?