Physics, 02.10.2019 03:20 youngalien

To calibrate your calorimeter cup, you first put 45 ml of cold water in the cup, and measure its temperature to be 24.7 °c. you then pour 47 ml of hot water, temperature = 46.1 °c, into the cup and measure the temperature every thirty seconds over a 10 minute period. you extrapolate this "cooling curve" back to the time of addition and find that the "final temperature" after mixing is 33.4 °c. what is the heat change of the cold water in joules? give your answer in standard notation. do not input units.

Answers: 2

Show answers

Another question on Physics

Physics, 22.06.2019 12:50

Air is contained in a variable-load piston-cylinder device equipped with a paddle wheel. initially, air is at 400 kpa and 17°c. the paddle wheel is now turned by an external electric motor until 75 kj/kg of work has been transferred to air. during this process, heat is transferred to maintain a constant air temperature while allowing the gas volume to triple. calculate the required amount of heat transfer in kj/kg.

Answers: 2

Answer

Physics, 22.06.2019 13:00

Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.

Answers: 2

Answer

Physics, 22.06.2019 14:10

The number of passengers who arrive at the platform of a subway station for the 10 am train is a random variable with a mean of 120 and a variance of 16. find the lower bound of the probability that there will be between 100 and 140 passengers (round off to second decimal place).

Answers: 3

Answer

Physics, 22.06.2019 17:20

Properties seen when one one substance changes to another are known as properties

Answers: 1

Answer

You know the right answer?

To calibrate your calorimeter cup, you first put 45 ml of cold water in the cup, and measure its tem...

Questions