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Twelfth Grade (Grade 12) Physics Questions

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Grade 12 Forces and Motion

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Weight is a measure of                                                   .
  1. your mass
  2. the gravitational attraction between you and Earth
  3. mechanical equilibrium
  4. all of these
  5. none of these
Grade 12 Waves and Sound
Sound waves with a frequency above 20,000 Hz are referred to as                 .
  1. doppler waves
  2. infrasonic waves
  3. sonic booms
  4. ultrasonic waves
Grade 12 Energy and Momentum
A force applied to a body is said to do "work"                                                                        .
  1. if the body is displaced in the direction of the applied force
  2. if the body is displaced in the direction opposite to the applied force
  3. even if the body does not move
  4. only when the body is moving
Grade 12 Thermodynamics
According to second law of thermodynamics, heat energy cannot be completely converted into useful work owing to                                       .
  1. the entropy of the system
  2. the enthalpy of the system
  3. the internal energy of the system
  4. the translational energy of the system
Grade 12 Matter
Which type of energy is released when an ionic solid is dissolved in water?
  1. Hydration energy
  2. Solvation energy
  3. Lattice energy
  4. Crystal energy
Grade 12 Magnetism and Electricity
The amount of charge that builds up due to the friction between two materials depends on the                                         .
  1. weight of the materials
  2. surface area in contact
  3. electrical conductivity of the materials
  4. lattice structures of the materials
Grade 12 Forces and Motion

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You have two objects. One object weighs 50 N on the Moon. One object weighs 50 N on Earth. Which object would have the greatest mass?
  1. They have the same mass.
  2. The one on Earth.
  3. The one on the Moon.
Grade 12 Forces and Motion
What is the definition for the term "vector"?
  1. a quantity having direction as well as magnitude, especially as determining the position of one point in space relative to another
  2. the total displacement (Δd), change in position , divided by the total time for that displacement.
  3. they can provide tons of information of an objects motion in graph
  4. A and C
Grade 12 Waves and Sound
Which of the following types of waves causes particles in matter to move back and forth along the same direction in which the wave travels?
  1. Compressional Waves
  2. Electromagnetic Waves
  3. Longitudinal Waves
  4. Transverse Waves
Grade 12 Forces and Motion
According to Newton’s laws of motion, an object set in motion remains in motion unless a force acts on it. If you suspend an object from a string and make it swing, the object will swing for a while, then slow down and stop. Why does the suspended object stop swinging?
  1. It is because an object at rest remains at rest unless a force acts upon it.
  2. It is because the mass of the object is too small to maintain the motion.
  3. It is because energy is the ability to do work.
  4. It is because gravity is pulling it toward the Earth.
  5. It is because energy of motion is converted to heat through friction with air.
Grade 12 Light and Optics
What occurs when the angle of incidence of a light ray is greater than the critical angle?
  1. critical refraction
  2. total internal reflection
  3. total external reflection
  4. dispersion
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