In an experiment to determine the specific latent heat of vaporization of water steam 100 degrees Celsius was passed into water contained in a well lagged calorimeter the following measurements were made mass of calorimeter 60 grams initial mass of water 8 grams final mass of calorimeter + condense steam 143 initial temperature of mixture 17 degrees celcius final temperature of mixture 32 degrees Celsius specific heat capacity of copper 390 joules per kilogram per Kelvin a)determine the mass of condensed steam ​
b)determine the heat gain by calorimeter and water
c)determine the latent heat of vaporization of steam

While studying chemical reactions and conservation of matter, sarah's class conducted a variety of experiments. sarah and her lab partner found the mass of a wax candle and placed the candle in a flask. the students lit the candle and let it burn to completion. all that was left was wax and charred candle wick. per their teacher's instructions, the students found the mass of the products. their data can be seen in the data table. formulate a hypothesis the students could test to explain why the experiment did not support the law of conservation of matter. a) the students could repeat the experiment using different candles; there might have been a flaw in the candle. b) the experiment should be repeatable. the students should run several trials and then take an average of the after mass in each trial. c) the students should have someone in the class check their measurement skills as they repeat the experiment. they may have made an error using the balance. d) the students should burn the candle in a container that has some type of lid so that any gas that is a product of the reaction can be contained and massed. submit

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

Aproton is shot from the negative disk toward the positive disk. what launch speed must the proton have to just barely reach the positive disk?