SAT2物理练习题三道.

　　下面为大家整理的是关于SAT2物理练习题的部分，后面附有详细的答案解析。大家可以在备考自己的SAT2物理考试的时候，针对自己的实际情况对相关的内容做总结，并根据知识点的不同进行适当的练习。

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　　1.Two balls are rolled along a frictionless surface, as illustrated above. The balls have the same mass and travel at identical speeds. If the balls meet in a completely elastic collision, each of the following conditions occurs EXCEPT:

　　(A) kinetic energy is conserved

　　(B) the mass of the system remains constant

　　(C) the balls will possess different magnitudes of acceleration

　　(D) each ball will possess the same momentum as bore the collision

　　(E) each ball will possess the same momentum as after the collision

　　2. The first law of thermodynamics encompasses each of the following ideas EXCEPT:

　　(A) conservation of energy

　　(B) energy cannot be created or destroyed

　　(C) energy may be converted into different forms

　　(D) likelihood of a process occurring

　　(E) change in internal energy of a system equals the difference between the heat absorbed and the work done by the system

　　3. Which of the following always describe the image produced by a diverging lens?

　　I. Virtual

　　II. Erect

　　III. Smaller than object

　　(A) I only

　　(B) III only

　　(C) I and II only

　　(D) II and III only

　　(E) I, II, and III

　　Explanation

　　1. The correct answer is (C).

　　In a completely elastic collision, kinetic energy is conserved. Momentum (p) is dined by the expression:

　　p = mv

　　Therore, if the mass and speed of each ball is identical:

　　m1 v1 = m2 m2

　　However, as each ball has a constant speed, the acceleration is zero for each ball.

　　2. The correct answer is (D).

　　The first law of thermodynamics does not address the spontaneity of a given process.

　　3. The correct answer is (E).

　　Diverging lenses produce images with the same characteristics: virtual, erect, and smaller than the object.

　　以上就是这3道SAT2物理练习题的全部内容介绍，非常详细。大家在准备报名SAT2考试的时候，物理一直都是最受青睐的选项之一。下面希望通过对练习题的准备，大家能对相关的知识点有更多的理解和掌握。