2014CAP Prize Exam加拿大高中物理大獎賽真題免費下載

歷年CAP High School Prize Exam加拿大高中物理大獎賽

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2014 CAP Prize Exam真題免費下載

共計3小時考試時間

此套試卷由25道選擇題以及3道大題組成

每道大題含有不同數量的小題

完整版下載鏈接見文末

部分真題預覽：

Data:

Speed of light c =3.00 × 10⁸m/s

Gravitational constant G =6.67 × 10^?11N · m²kg²

Acceleration due to gravity g =9.80m/s²

Normal atmospheric pressure P0 =1.01 × 10⁵Pa

Density of fresh water ρ =1.00 × 10³kg/m³

Speci?c heat of water Cw = 4186J/(kg · K)

Speci?c heat of ice Ci = 2050J/(kg · K)

Latent heat of water Lw = 2260kJ/kg

Latent heat of ice Li = 334kJ/kg

Density of ice ρi = 916kg/m³

Fundamental charge e =1.60 × 10^?19C

Mass of electron me =9.11 × 10^?31kg

Mass of proton mp =1.67 × 10^?27kg

Planck’s constant h =6.63 × 10^?34Js

Coulomb’s constant 1/(4_πε0)=8.99 × 10⁹ N · m² /C²

Boltzmann’s constant k=1.38 × 10^?23J/K

A.U. Astronomical Unit = 1.49598 ×10¹¹m: The approx-imate distance from the Sun to the Earth.

Radius of the Earth RE =6.371 × 10⁶m

Radius of the Sun RS =6.96 × 10⁸m

Stefan’s constant σ =5.6704 × 10^?8W/(m²· K⁴)

Part A: Multiple Choice

1)Consider the electric power dissipation due to resis-tance in a circuit. Which of the following changes leave the dissipated electric power unchanged?

1. Doubling the voltage and reducing the current by a factor of two.
2. Doubling the voltage and increasing the resistance by a factor of four.
3. Doubling the current and reducing the resistanceby a factor of four.
4. None of the above.
5. Both(b) and(c) are correct.
6. (a),(b) and(c) are correct.

2)A U-shaped glass tube closed at both ends and posi-tioned vertically is partly ?lled with water. At a cer-tain time the levels of water are di?erent in the two arms of the tube due to a di?erence in air pressure above each arm. If there is no temperature change, what will happen to the water level on both sides?

1. The water levels will stay stationary.
2. The water levels will equalize rapidly — within sec-onds.
3. The water levels will slowly equalize — within days.
4. The di?erence between the levels in each arm will increase.

3)How does the magnitude of the gravitational force with which the Moon attracts the Earth compare to the magnitude of the gravitational force with which the Earth attracts the Moon?

1. They are equal.
2. The first is greater.
3. The first is smaller.

4)The friction force acting on a bicycle is 20N. What power does a cyclist need in order to travel at 18km/h?

1. 50W
2. 100W
3. 1800W
4. 3600W

5)What is the average horizontal force acting on a ball when it elastically bounces o? a wall, assuming the collision time is 0.1s and the momentum of the ball before the bounce was 2kg· m/s,perpendicular to the wall?

1. 0.2N
2. 0.4N
3. 40N
4. 20N

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