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千千万万遍
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此套试卷由两部分组成
25道选择题
以及3道简答题组成
每道大题含有不同数量的小题
完整版下载链接见文末
Data:
Speed of light c =3.00 × 108m/s
Gravitational constant G =6.67 × 10−11N · m2kg2
Radius of Earth RE=6.37× 103 Km
Mass of Earth ME=6.0× 1024 Kg
Radius of Earth's orbit RES=1.50× 108 Km
Acceleration due to gravity g =9.80m/s2
Fundamental charge e =1.60× 10−19 C
Mass of electron me =9.11 × 10−31kg
Mass of proton mp =1.67 × 10−27kg
Planck’s constant h = 6.63x10-34 J·s
Coulomb’s constant 1/(4πε0) = 8.99x109 N·m2/C2
Speed of sound in air vs=343m/s
Energy conversion 1eV=1.6 x 10-19J
Part A: Multiple Choice
1)A parallel-plate capacitor holds charge q and is not connected to anything. The distance between the plates is now increased. The electrical energy stored on the capacitor
2)When a mechanical or electromagnetic wave goes from medium to another, it undergoes a change in
3)Two idential rooms in a perfectly insulated house are connected by an open doorway. The temperature in the two rooms are maintained at different values. The room which contains more air molecules is
4)Three airplanes, A,B and C, each release an object from the same altitude and with the same initial speed v0 with repsect to the ground. At the moment their object is released, A is flying horixontslly, B is flying upward at an angle θ with repect to the horizontal, and C is flying at the same angle θ as B but downward with respect to the horizontal. Assuming the gournd to be horizontal and neglecting any aerodynamical effect, the speeds v at which the three objects will hit the ground satisfy
5)Two identical conducting spheres, A and B, carry equal electric charge. They are separated by a distance much larger than their diameter and exert an electrostatic force F on each other. A third identical conducting sphere C is initially uncharged and far away from A and B. Sphere C is then brought briefly into contact with sphere A, then with sphere B, and finally removed far away. The electrostatic force between A and B is now
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