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1 ask for coordinates. s=30.625 is not a coordinate. You need to calculate horizontal and vertical displacements x and y using y = ut-1/2gt^2 and another equation 2 d = 0.1 cm? m? Answer doesn't seem correct. What is your working? 3. A limitation would be that it doesn't take into account air resistance No particle will move if it has no ...
Each of two light elastic strings, AB and BC, has modulus 20 N. AB has natural length 0.5 m and BC has natural length 0.8 m. The strings are both attached at B to a particle of mass 0.75 kg. The ends A and C are fixed to points on a smooth horizontal table such that AC = 2 m, as shown in the diagram. A B.
4. Weigh approximately 1 g of potassium iodide crystals and add it into the solution in the conical flask. 5. Then add in 10.0 mL of 1.0 M sulphuric acid solution and swirl the conical flask until all the KI has dissolved. 6. (i) Titrate immediately the released iodine with the sodium thiosulphate solution while swirling the conical flask until ...
C2 Question about Sin and Cosine. Jonario. Heres the question. Figure 1 shows the triangle ABC, with AB = 6 cm, BC = 4 cm and CA = 5 cm. (a) Show that cos A = 4/3. (3) (b) Hence, or otherwise, find the exact value of sin A. Can't seem to find a way to put up the image of the triangle sorry :s. I know how to do part (a) but part (b) is really ...
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25.0 cm3 samples of the solution were titrated with 0.102 mol dmí hydrochloric acid. The results are shown in the table. € € € Rough 1 2 3 € Initial burette reading / cm 3 € 0.00 10.00 19.50 29.25 € Final burette reading / cm 3 10.00 19.50 29.25 38.90 € Titre / cm 3 10.00 9.50 9.75 9.65 2 Page 1 of 76
A. Principleturn. 4. When ethanoic acid reacts with sodium hydroxide, the enthalpy change, ∆H, is. –56.1 kJ mol–1. CH3COOH (aq) + NaOH (aq) CH3COONa (aq) + H2O (l) Calculate the temperature rise when 25 cm3 of 2.0 mol dm–3 aqueous ethanoic acid. react with 25 cm3 of 2.0 mol dm–3 aqueous sodium hydroxide.
May 27, 2019 · 0.004 mm^3 = 0.000004 cm^3 then 1/0.000004 = 250000 250000 x 15 x 1000 = 3.75x10^9 its a sneeky conversion because its mm cubed, so it actually is quite different Oh blast. Definitely something I'm going to need to revise then.
Feb 23, 2023 · A level chemistry help please. A student does an experiment to determine the percentage by mass of sodium chlorate (I), NaCIO, in a sample of bleach solution. Dilute a 10.0 cm° sample of bleach solution to 100 cm° with distilled water. Transfer 25.0 cm3 of the diluted bleach solution to a conical flask and acidify using sulfuric acid.
Was doing this for some time but not sure what the answer will be... The pub sign is supported by a hinge and by a metal rod. Calculate the tension in the rod if the pub sign is an 80cm square of mass 30kg. Ignore the mass of the rod, and assume that the hinge is well-oiled. Any help would be greatly appreciated. Thanks alot. Here is the the ...
