A Physics 4C student team is doing a thermal experiment where they have two rods of different materials. One rod is made of cooper and the other brass. They are joined together. The brass section has a length of 0.355 m. The copper section a length of 0.750 m. Each segment has cross-sectional area of 0.00475 m^2. Boiling water is in contact with the free end of the brass rod while the free end of the copper is in contact with an ice-water mixture. This experiment is being conducted in standard atmospheric pressure. The sides of the rods are insulated to prevent heat loss to the surroundings.(a) Where the copper and brass are joined, what is the temperature?(b) What is the mass of ice that is melted in 6.00 min by the conducted heat of the composite rod?Lf = 3.334 x 10^5 J/kg
k = 109 W/(m •K) for brass k = 385.0 W/(m K) for copper

Occurs when an energy source transfers heat directly to another subject space; an example would be an object becoming warm by sitting in the sunshine

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

1. a camcorder has a power rating of 19 watts. if the output voltage from its battery is 7 volts, what current does it use?answer units 2. a 1.5m wire carries a 6 a current when a potential difference of 57 v is applied. what is the resistance of the wire? your