历年''物理碗''真题下载

物理碗学术活动难在哪？

与常规考试不同，学术活动题目十分灵活，注重考查学生的分析能力和物理思维，并不注重对计算能力和解题套路的考查，需要学生逐步积累物理学科素养。 物理碗学术活动涵盖的内容非常宽泛，涉及到高中物理所有知识点，以及部分大学物理内容和基本的物理学常识。考点范围包括力学、电磁学、热学、光学和现代物理。

物理碗部分例题：

以下是一些来自物理碗Division I考试的各种样题，其中一些包括方程或常数：

8.) A candle, a converging lens and a white screen are placed in a line with the lens between the candle and the screen. A distance of 72 cm separates the candle and screen. As the lens is moved to all points between the candle and the screen, only one focused image of the candle can be made on the screen. What is the focal length of the converging lens?
(A) 12 cm (B) 18 cm (C) 24 cm (D) 36 cm (E) It cannot be determined without knowing the location of the lens when the focused image is produced.

35.) In a mixture of hydrogen, oxygen, and nitrogen gases at room temperature, the molecules having the greatest average speed are those of？
(A) Hydrogen (B) Oxygen (C) Nitrogen (D) All have the same speed (E) It depends upon the composition of the mixture
Here are some various example questions from the Division III exam, some of which include equations or constants:

44.) Consider a traveling wave on a string of length L, mass M, and tension T. A standing wave is set up. Which of the following is true?
(A) The wave velocity depends on M, L, T. (B) The wavelength of the wave is proportional to the frequency. (C) The velocity of a given particle in the string is equal to the wave velocity. (D) The wavelength is proportional to T. (E) The frequency depends upon L.

49.) A lump of clay whose rest mass is 4.0 kg is traveling at three-fifths of the speed of light when it collides head-on with an identical lump going in the opposite direction at the same speed. If the two lumps stick together and no energy is radiated away, what is the mass of the composite lump?
(A) 4.0 kg (B) 6.4 kg (C) 8.0 kg (D) 10.0 kg (E) 13.3 kg

如果能回答上来其中的一些问题，是一个很好的迹象，表明你应该参加物理碗学术活动。

准备物理碗，如果有专业的学术活动导师进行指导，对于快速了解学术活动大纲、考试重难点、应试技巧，腾出更多时间专注学术活动内容是非常有帮助的，得奖机会会更大。

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