Class data: (in grams) *.81 *.75 2.3 *1.72 *1.39 2.37 2.06 *1.03 2.02 2.18 2.3+2.06+2.02+2.37+2.18=10.93 10.93/5= 2.186 Class average mass of zinc in a penny is 2.19g 3. How much (in g) of the penny was made of copper? Mass of penny 2.47g Mass of zinc - .81g =
Then Kaku states that force fields can do more than deflecting laser beams because it can levitate objects by the use of magnetic force fields. To support that, he explains that when we place two magnets opposite to each other, the two magnets will repel each other. However he wrote that making force fields and to levitate heavy objects is nearly impossible since we lack advanced technology. For my response, Kaku doesn’t completely explain everything. Suppose that you have a structure on a planet or a spaceship in the middle of nowhere, and suppose you don't want the force field on all the time either because there are times when protection isn't needed.
And according to our data, our actual yield is 0.5g CaCO3. Thus, our percent yield is 73.5%. Our percent yield was close to 100%, but not very close. I believe the error lies in human error, as well as instrumentation sensitivity. Our scale only measures to grams accurately, and could have not accurately represented the .68g of CaCO3, or we could have lost the solid precipitate in the process of the experiment.
These potential causes can be grouped together to be dismissed, having a similar end result. Nuclear war and the less likely, but still possible, gamma ray burst can be easily dismissed due to the lack of one key condition. A gamma ray burst is a type of explosion caused by a star nearing supernova. Its explosion sends a massive amount of radiation and energy in a very compact beam that could easily bake the planet with enough radiation that nearly all forms of complex life, humans included, would perish quickly. The resulting nuclear winter would occur causing the aforementioned minor ice age event, but it is the lack of radiation that prevents this from being a possible answer.
It was a short iron tube with a tiny hole at the end for the fuse. These were used more like small canons because they were difficult to carry and fire at the same time. They were used more for intimidation because they took too long to reload and were too inaccurate to be very effective. Gunpowder had to be mixed on site because it was very dangerous to travel with, so gun crews had to try to mix the correct amount of each ingredient during battle. These made accuracy impossible because the explosive force of the powder varied every time.
here we go. The mechanics of how all the black holes in the movie acted were a bit sketchy. For example, the first black hole that Spock and The Narada exit/enter from was created from “Red Matter” in mere seconds. Accepting that red matter creates a black hole, this event would not take mere seconds as it did in the movie, but numerous years rather. In addition, entering a black hole would not only take thousands of years to occur, according to “Spaghetti theory” the gravity would be so intense as you neared the center of the black hole, your body would be stretched out into a thin strip of organic matter.
(Williamson). Colorado’s gas regulator took the unusual step of releasing a public debunking of Gasland’s claim that fracking is responsible for the flaming faucets. (1) There’s other stuff in that fracking slurry, too, but really nothing that isn’t considered run of the mill industrial chemicals (those friction-reducers use a polymer that also is used in children’s toys, for example). And these chemicals aren’t injected until the pipes have run more than a mile beneath the surface of the earth, and then it’s being injected 4 or 5 Empire State Buildings deeper than the aquifer, separated by impermeable rock. Fracking couldn’t occur through that if engineers tried.
Also, just last year, the fifty and the ten got their makeover with the watermarks and the different colors (Hagenbough). Another way to prevent counterfeiting is through technology safeguards. So far only Cannon has taken the bureau up on the offer back in 1992. All information is classified for obvious reasons. However, one thing that happens when a counterfeiter tries to scan the money is a warning comes up telling him that it cannot copy this because under law it is not allowed.
4. Why are boiling chips useful when boiling liquid? Discussion: In this experiment my partner and I misunderstood how far to carry the significant figures. We took them over two decimals places when it really only should have been one decimal place over. Because we didn’t count the proper number of significant figures in the volume we had too many when we went to calculate the density.
Year 10 Unit 1 Mathematics Test Total 46 Marks 1. Simplify the following fractions a) 56/84 b) 0.6/1.2 c) 15/45 [3 marks] 2. Change each of these to a mixed number a) 8/3 b) 13/4 c) 17/5 d) 19/7 [4 marks] 3. Calculate these a) 4-2 x 3 b) (4-2) x 3 c) 20 ÷ 1 + 3 [3 marks] 4. Find a) 1.5 % of 50 b) 4.2 % of 500 kg c) 5.7 % of $3000 [3 marks] 5.