问题描述：
英语翻译
10 A positively charged glass rod attracts object X.
The net charge of object X
(1) may be zero or negative
(2) may be zero or positive
(3) must be negative
(4) must be positive14 The potential energy stored in a compressed
spring is to the change in the spring’s length as the
kinetic energy of a moving body is to the body’s
(1) speed (3) radius
(2) mass (4) acceleration
18 What is the resistance at 20.°C of a 2.0-meter
length of tungsten wire with a cross-sectional
area of 7.9 × 10–7 meter2?
(1) 5.7 × 10–1 Ω (3) 7.1 × 10–2 Ω
(2) 1.4 × 10–1 Ω (4) 4.0 × 10–2 Ω
30 What is the speed of a ray of light
(f = 5.09 × 1014 hertz) traveling through a block
of sodium chloride?
(1) 1.54 × 108 m/s (3) 3.00 × 108 m/s
(2) 1.95 × 108 m/s (4) 4.62 × 108 m/s
32 Two waves traveling in the same medium and
having the same wavelength (λ) interfere to
create a standing wave.What is the distance
between two consecutive nodes on this standing
wave?
35 A tritium nucleus is formed by combining two
neutrons and a proton.The mass of this nucleus
is 9.106 × 10–3 universal mass unit less than the
combined mass of the particles from which it is
formed.Approximately how much energy is
released when this nucleus is formed?
(1) 8.48 × 10–2 MeV (3) 8.48 Mev
43 Pieces of aluminum,copper,gold,and silver
wire each have the same length and the same
cross-sectional area.Which wire has the lowest
resistance at 20°C?
(1) aluminum (3) gold
(2) copper (4) silver51 A lithium atom consists of 3 protons,4 neutrons,
and 3 electrons.This atom contains a total of
(1) 9 quarks and 7 leptons
(2) 12 quarks and 6 leptons
(3) 14 quarks and 3 leptons
(4) 21 quarks and 3 leptons
58 If a proton were to combine with an antiproton,
they would annihilate each other and become
energy.Calculate the amount of energy that
would be released by this annihilation.
69 The magnitude of the force the Sun exerts on Uranus is 1.41 × 1021 newtons.Explain how it is possible for
the Sun to exert a greater force on Uranus than Neptune exerts on Uranus.
35 What fundamental force holds quarks together
to form particles such as protons and neutrons?
(1) electromagnetic force
(2) gravitational force
(3) strong force
(4) weak force
39 What is the magnitude of the force needed to keep a 60.-newton rubber block moving across level,dry
asphalt in a straight line at a constant speed of 2.0 meters per second?
(1) 40.N (3) 60.N
(2) 51 N (4) 120 N
50 What is the wavelength of a light ray with frequency 5.09 × 1014 hertz as it travels through Lucite?
(1) 3.93 × 10–7 m (3) 3.39 × 1014 m
(2) 5.89 × 10–7 m (4) 7.64 × 1014 m
(2) 2.73 MeV (4) 273 MeV
10 A positively charged glass rod attracts object X.
The net charge of object X
(1) may be zero or negative
(2) may be zero or positive
(3) must be negative
(4) must be positive14 The potential energy stored in a compressed
spring is to the change in the spring’s length as the
kinetic energy of a moving body is to the body’s
(1) speed (3) radius
(2) mass (4) acceleration
18 What is the resistance at 20.°C of a 2.0-meter
length of tungsten wire with a cross-sectional
area of 7.9 × 10–7 meter2?
(1) 5.7 × 10–1 Ω (3) 7.1 × 10–2 Ω
(2) 1.4 × 10–1 Ω (4) 4.0 × 10–2 Ω
30 What is the speed of a ray of light
(f = 5.09 × 1014 hertz) traveling through a block
of sodium chloride?
(1) 1.54 × 108 m/s (3) 3.00 × 108 m/s
(2) 1.95 × 108 m/s (4) 4.62 × 108 m/s
32 Two waves traveling in the same medium and
having the same wavelength (λ) interfere to
create a standing wave.What is the distance
between two consecutive nodes on this standing
wave?
35 A tritium nucleus is formed by combining two
neutrons and a proton.The mass of this nucleus
is 9.106 × 10–3 universal mass unit less than the
combined mass of the particles from which it is
formed.Approximately how much energy is
released when this nucleus is formed?
(1) 8.48 × 10–2 MeV (3) 8.48 Mev
43 Pieces of aluminum,copper,gold,and silver
wire each have the same length and the same
cross-sectional area.Which wire has the lowest
resistance at 20°C?
(1) aluminum (3) gold
(2) copper (4) silver51 A lithium atom consists of 3 protons,4 neutrons,
and 3 electrons.This atom contains a total of
(1) 9 quarks and 7 leptons
(2) 12 quarks and 6 leptons
(3) 14 quarks and 3 leptons
(4) 21 quarks and 3 leptons
58 If a proton were to combine with an antiproton,
they would annihilate each other and become
energy.Calculate the amount of energy that
would be released by this annihilation.
69 The magnitude of the force the Sun exerts on Uranus is 1.41 × 1021 newtons.Explain how it is possible for
the Sun to exert a greater force on Uranus than Neptune exerts on Uranus.
35 What fundamental force holds quarks together
to form particles such as protons and neutrons?
(1) electromagnetic force
(2) gravitational force
(3) strong force
(4) weak force
39 What is the magnitude of the force needed to keep a 60.-newton rubber block moving across level,dry
asphalt in a straight line at a constant speed of 2.0 meters per second?
(1) 40.N (3) 60.N
(2) 51 N (4) 120 N
50 What is the wavelength of a light ray with frequency 5.09 × 1014 hertz as it travels through Lucite?
(1) 3.93 × 10–7 m (3) 3.39 × 1014 m
(2) 5.89 × 10–7 m (4) 7.64 × 1014 m
(2) 2.73 MeV (4) 273 MeV
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