Suggest two reasons why models were tested

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August undefined, 2024

WebWhile assembling part of an electric generator, you realize that two pieces were not properly labeled. One piece is a nonconducting block, and the other is a conducting block, but … Web10 Jun 2009 · ventricle during two complete cardiac cycles. (i) Use the information in the graph to calculate the heart rate. Show your working. (3) Answer ..... (ii) During the cardiac cycle, the pressure in the right ventricle rises to a maximum of about 3.3 kPa. Suggest reasons for the difference between this

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WebSuggest . two. advantages of bilateral symmetry. ... In order to compile the data in the table, blood tests were carried out on: individuals from each ethnic group. The individuals were given codeine and blood morphine levels were then measured. Suggest : … WebScientists used to think that electrons were spread out through a positively charged atom. They called this the ‘plum pudding’ model. To test this idea, scientists aimed alpha particles at thin gold foil. They expected the alpha ... Suggest two reasons why using a graph to find the refractive index is a better method lily whyte

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WebThe idea of obtaining power from nuclear fusion was investigated using models. The models were tested before starting to build the first commercial nuclear fusion power station. … Web13 Jun 2013 · (c) People from different countries were tested to find out if they were lactose intolerant. The table shows the number of people who were tested in each country and the percentage who were lactose intolerant. Country Number of people tested Percentage who were lactose intolerant A 160 4 B 315 12 C 134 18 D 20 75 E 59 89 F 71 93 G 134 98 H 24 … Web0 1 Charles Darwin proposed the theory of natural selection. Many people at the time did not accept his theory. 0 1 . 1 There was a different theory at the same time as Darwin’s theory. The different theory said that changes in an organism during its life could be inherited. Who proposed this theory? [1 mark] 3 SPECIMEN MATERIAL 0 1 . 2 lily wholesale clothing

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WebSlugs were placed in each pot and records were kept of the number of leaves damaged by the feeding of the slugs over a period of 7 days. The results are shown in Table 1. Table 1. Undamaged Damaged. Cyanogenic plants 160 120. Acyanogenic plants 88 192 (d) A x 2 test was carried out on the results. (i) Suggest the null hypothesis that was tested. WebBefore a new bus can be used on the roads, it must pass a stability test. The diagram shows how the bus is tested. (a) (i) The bus will topple over if the ramp is tilted at too great an angle. Explain why. [2 marks] (ii) The bus is tested to angles of tilt far greater than it would experience in normal use. Suggest two reasons why. [2 marks] lily wholesale flowersWeb6 SPECIMEN MATERIAL 0 3 The National Grid ensures that the supply of electricity always meets the demand of the consumers. Figure 2 shows how the output from fossil fuel … lily wielders

"Webphotosynthesis. Two plants were destarched and then put in glass containers A and B as shown in the diagram. After two days in the containers the plant leaves are tested for starch. (a) (i) Suggest why the pots were covered with clear-plastic bags. (2) " - Suggest two reasons why models were tested

Suggest two reasons why models were tested

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WebExplain two reasons why the economies of developed and developing world cities differ. [4 marks] This question is point marked. Students should give two reasons why the economies of developed and developing world cities vary, with additional marks available for the development of these points. Correct points that could be developed include: Web(i)€€€€€€Suggest why the gas collected in the balloon and released after day two did not burn. (3) (ii)€€€€€Suggest why potato peelings produced the most biogas.

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Web17 Jun 2015 · All other variables were kept constant. Two groups of people were used in this investigation. In the first group, the warm object was used before the hot object. In the second group, the hot object was used before the warm object. After each experience, the individuals were asked to rate their feelings using the scoring system below. Feelings Score Web0 1 Charles Darwin proposed the theory of natural selection. Many people at the time did not accept his theory. 0 1 . 1 There was a different theory at the same time as Darwin’s theory. …

Web6 Nov 2024 · Nuclear fusion is an attempt to replicate the processes of the Sun on Earth. It differs significantly from nuclear fission, which has been our only way of getting electricity … Web(b)€€€€€Some drugs were originally extracted from living organisms. Draw one line from each drug to the organism it was originally extracted from. € (2) (c)€€€€€New drugs must be tested before they can be used. Give one reason why drugs should be tested. _____

WebGive one reason for the change in death rate from malignant skin tumours with increasing age. (1) Exposure when young but cancer triggered later. The data for fair-skinned and dark-skinned people were collected separately.Explain why skin colour was a factor … Web(a) Give two reasons why a binomial distribution may be a suitable model for the number of faulty bolts in the sample. (2) (b) Using a 5% significance level, find the critical region for a …

Web(ii) In this test, another substance should be added to react with any carbonate ions (2) that might be present. Identify this other substance and state one observation that would be made if carbonate ions were present. Other substance Observation. PhysicsAndMathsTutor.com

WebSuggest two reasons why models were tested. Any two from: - to make sure the fusion process is possible. - to develop an understanding of the process. - to make adaptations … hotels near gage lnWebThe idea of obtaining power from nuclear fusion was investigated using models. The models were tested before starting to build the first commercial nuclear fusion power station. … lily whyte howickWebThere are many reasons, physical and human, to explain differences in levels of development between countries. Factors such as climate and government type are important to a country’s... lily wichern cheerleaderWebSuggest two reasons why alloys of gallium are more useful than the metallic element. ... Describe a test for chlorine. ... chloride were added to solutions of potassium iodide and acidiied potassium manganate(VII). The results are shown in … hotels near gaffney south carolinaWebScientists used the model to make predictions about their experiments. Often the data did not agree with their predictions. This meant that the model had to be changed. lily wiese hotels near gaggal airportWebThe main reasons why E. coli is the organism of choice extends and is not limited to its fast growth in chemically defined media; relative cheap culture media; does not form aggregates; industrial scalability; several molecular … lily wiest