Сборник задач по подготовке учащихся к международным исследованиям timss и pisa
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- Task 16. Oil
| Task 15. Scales
The weight of the substances A and B was measured in the balance, as shown in Figure 5a. In substance B placed in a container with substance A, whereby the compound formed C. empty container, wherein the substance B were, placed back on the scale, as shown in Figure 5b Figure 5 а Figure 5b Scales on the figure 5a showing weight 110 g Question. What weight will the scales in Figure 5b? A. More than 110 g C. 110 g C. less than 110 g 133 Explain your choice. Task 16. Oil Oil refers to the non-renewable natural resources. Question. Which of these natural resources is also a non-renewable? A. Wood. В. Sea water. S. Sunshine. D. Coal. Task 17. Figure 12 shows the experimental results of stress measurements on the conductor ends for different values of the current strength in it. Figure 6 Question. What is the electrical resistance of a conductor when a current of 1.5 A? A. 4 Ohm B 2 Ohm C 0.75 Ohm D 0,25 Ohm Task 18 To determine the weight by using wrong lever scales can use the following method. In one of the cups weights to put some weight (necessary for it to be weighed is heavier than the body). To counterbalance this load weights on the other plate. After that, put on a cup of weights weighed body and remove her as weights, as needed, to restore balance. Question. What is the weight of the body to be weighed? A Mass of the cargo. B. Mass remains on the cup weights. C. Mass removed from the cup weights. Task 19. Regularly distributed in three main spheres of objective reality levels ( "from the simple to the complex"), using the table 2. |