2017CAP 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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2017 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

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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 =9.81m/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

Electrostatic constant k =8.99 × 10⁹N · m²/C²

Boltzmann’s constant kB =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/(m· K⁴)

H2 Molar mass 2.016g/mol

O2 Molar mass 31.998g/mol

N2 Molar mass 28.013g/mol

Mass of the Earth 5.97 × 10²⁴kg

Mass of the Sun 1.99 × 10³⁰kg

 

1) On a dry day you comb your hair. Afterwards you notice that bringing the comb close to small bits of pa-per attracts the paper, causing it to jump o? the table towards the comb. The correct explanation for this phe-nomena involves:

1. The comb is positively charged after combing, and the paper is negatively charged.
2. The comb is negatively charged after combing, and the paper is positively charged.
3. The comb is charged and the paper has no net charge.
4. The comb has no net charge and the paper has no net charge.
5. The comb has no net charge, the paper has positive charge.

2) It takes a ray of light roughly 2.5 million years to travel from our galaxy to the Andromeda galaxy. In a new sci-ence ?ction ?lm, travelers aboard a spaceship reach the Andromeda galaxy by traveling at high speed. The trav-elers get about 15 years older during the journey. Which of the following statements is true?

1. This is impossible, although an observer on Earth would see the travelers aging slowly, in fact the ob-servers age more quickly.
2. This is impossible, the travelers would need to live for at least 2.5 million years to reach the Andromeda galaxy.
3. This is a possible scenario. An observer in the An-dromeda galaxy would measure the travel time to be over 2.5 million years, but time runs more slowly for the travelers.
4. This is a possible scenario, but only if the travelers go faster than the speed of light.

Figure 1

3) Electrophorus electricus, commonly known as the elec-tric eel, is capable of producing an 860 volt di?erence between its head and tail. When using this ability to stun prey, the electric eel will sometimes form a U shape as shown in Fig. 1. This has the e?ect that the eel’s prey is more likely to be stunned. Why is this?

1. The voltage difference between head and tail is in-creased.
2. The electric field between the head and tail is in-creased.
3. The electric field near the center of the eel is in-creased.
4. The voltage at the head and tail are increased by the same amount.

4) The creatures of flatland inhabit a 2-dimensional world. Square, a man of good standing in flatland, holds a hot candle which emits light of intensity 36 Watts. 3 metres away, a detector feels:

1. 
2. 
3. 
4. 
5. 

5) A tennis ball rolls along a rough surface. Initially the ball has a speed v. After a distance d the speed has been reduced to v=2. What total distance will the tennis ball travel? Assume that the rough surface applies a constant force to the tennis ball.

1. 2d
2. 3d
3. 
4. 

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