Bài 1: Một đoạn mạch gồm R1= 8 ôm; R2=12 ôm. Biết R1 nối tiếp với đoạn mạch gồm R2 song song với R3, R3= 1/2 R2 cường độ dòng điện qua mạch chính là 2A. a. Hãy vẽsơ đồmạch điện trên
b. Tính điện trởtương đương toàn mạch
.Tính cường độdòng điện qua mỗi

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

The speed of sound in ice, water, and steam is shown. what best explains the speed of sound in different states of matter? sound travels fastest in ice because energy is easier to transfer when the molecules are close together. sound travels slowest in steam because the sound has to move around the gas molecules that are far apart. sound travels fastest in ice because the temperature of solids is always greater, so the heat transfers the sound energy. sound travels slowest in steam because the pressure is so great the sound cannot travel though the steam particles.

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