On a trip to Edmonton, Rob travels at 100km/h(N) for 2.00h and stops for 15.0 min in Red Deer for a coffee. While sipping his coffee he realizes that his Flame's flag blew off his car so he drives back to Calgary to find it. After 30.0 min of driving 110km/h(S) he sees it, turns around and then resumes his trip to Edmonton at 140km/h(N) and arrives 1.25h later. a) what distance did he travel?
b) what is his displacement?
c) What is Rob's average speed?
d) What is Rob's average velocity?
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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

Atomic nuclei of almost all elements consist of

Aclarinetist, setting out for a performance, grabs his 3.350 kg clarinet case (including the clarinet) from the top of the piano and carries it through the air with an upward force of 24.65 n. find the case's vertical acceleration. indicate an upward acceleration as positive and a downward one as negative.