SAT2物理练习题

      今天新航道SAT频道小编为大家整理了SAT物理练习题，供大家参考，以下是详细内容。

　　1.Which of the following is a description of the image is always generated by the diverging lens?

　　A virtual

　　II. Erected

　　III. Smaller than the object

　　(A) I only

　　(B) three

　　(C) I and II only

　　(D) II and III

　　(E) I, II and III

　　2. Two balls rolling friction surface, as shown above. The balls have the same mass and travel at the same speed. If the ball is met in a perfectly elastic collision, unless the following conditions:

　　(A) kinetic energy conservation

　　(B) the mass of the system remain unchanged

　　(C) the ball will have a different degree of acceleration

　　(D) the ball will have the same momentum before the collision

　　(E) The ball will have the same momentum after collision

　　3. The first law of thermodynamics covers the following ideas, in addition to:

　　(A) energy conservation

　　(B) energy can not be created or destroyed

　　(C) the energy may be converted into different forms

　　(D) the likelihood of the process

　　(E) the difference between the change of internal energy of a system is equal to the heat absorbed by the system

　　Explanation

　　1. The correct answer is (E).

　　The image generated by the diverging lens having the same characteristics: virtual, upright, smaller than the object.

　　2. The correct answer is (C).

　　In a completely elastic collision, kinetic energy is conserved. Momentum (p) is defined by the following formula:

　　P = MV

　　Therefore, if the quality and speed of each ball is the same:

　　M1 V1 = square meters

　　However, since each ball, there is a constant speed, the acceleration of each ball is zero.

　　3. The correct answer is (D).

　　The first law of thermodynamics is not resolved to the spontaneity of the given process.

     以上是新航道SAT频道小编为大家整理的SAT物理练习题，希望对大家有帮助，更多资讯、资料请访问新航道SAT频道http://www.xhd.cn/sat/