SAT2物理練習(xí)題三道.

　　下面為大家整理的是關(guān)于SAT2物理練習(xí)題的部分，后面附有詳細的答案解析。大家可以在備考自己的SAT2物理考試的時候，針對自己的實際情況對相關(guān)的內(nèi)容做總結(jié)，并根據(jù)知識點的不同進行適當(dāng)?shù)木毩?xí)。

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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.

　　以上就是這3道SAT2物理練習(xí)題的全部內(nèi)容介紹，非常詳細。大家在準備報名SAT2考試的時候，物理一直都是最受青睞的選項之一。下面希望通過對練習(xí)題的準備，大家能對相關(guān)的知識點有更多的理解和掌握。