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 ?
Physics Heat & Thermodynamics Level: High School
23.3 degree zero on the Fahrenheit scale is what Celsius temperature ?
Physics Heat & Thermodynamics Level: High School
23.3 degree below zero on the Celsius scale is what Fahrenheit temperature ?
Physics Heat & Thermodynamics Level: High School
If a natural gas costs 0.084 dollar per kilogram and its heat of combustion is 5.40 x 10^7 J/kg , how much is the monthly cost (in dollar) to maintain the house at a temperature of 23.0 degreeC for 24 hr each day assuming 88.3 percent of the heat produced is used to heat the house .
Physics Heat & Thermodynamics Level: High School
If the house is initially at 11.2 degreeC , estimate how much heat must be supplied to raise the temperature to 23.0 degreeC within 33.0 min . Assume that only the air needs to be heated and that its volume is 707 m^3 . Take the specific heat of air to be 0.24 kcal/kgC .
Physics Heat & Thermodynamics Level: High School
A house has a well-insulated walls 17.7 cm thick (assume conductivity of air)and area 409 m^2 , a roof of wood 6.75 cm thick and area 281 m^2 . and uncovered windows 0.614 cm thick and total area 33.1m^2. Assuming that the heat loss is only by conduction , calculate the rate at which heat must be supplied to this house to maintain its temperature at 23.0 degreeC if the outside temperature is -10.5 degreeC .
Physics Heat & Thermodynamics Level: High School
During light activity , a 70.5 kg person may generate 195 kcal/hr . Assuming that 20.3 percent of this goes into useful work and the other 79.7 percent converted to heat , calculate the temperature (in degreeC) rise of the body after 1.05 hr if none of this heat were transferred to the environment
Physics Heat & Thermodynamics Level: High School
At what rate does the same person’s head absorb the sun’s energy if it is bald with e = 0.205 under the same conditions .5.12 J/s
Physics Heat & Thermodynamics Level: High School
At approximately what rate does the top of a person’s head absorb the sun’s energy on a clear day if it is covered with hair (e = 0.760) , has a surface area of 227 square centimeters (assumed flat), and the person stands straight with the Sun making an angle of theta = 37.5 degree with vertical .
Physics Heat & Thermodynamics Level: High School
A 31.8 g glass thermometer reads 22.0 degreeC it is placed in 121 mL of water . When the water and the thermometer come to equilibrium , the thermometer reads 39.9 degreeC . What was the original temperature of the water (in Celsius) ?
Physics Heat & Thermodynamics Level: High School
A small immersion heater is rated at 355 W . Estimate how long it will take to heat a cup of soup (assume this is 290 mL of water) from 21.0 degreeC to 48.4 degree C?