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 positive
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 positive
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
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
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
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?
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
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) silver
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
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.
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.
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
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
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
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