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Ninth Grade (Grade 9) Physics Questions

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Grade 9 Waves and Sound

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Far infrared light is closer to the microwave portion of the electromagnetic spectrum than it is to visible light. Which wavelength would be best described as being far infrared?
  1. 10-3m
  2. 10-4m
  3. 10-5m
  4. 10-6m
Grade 9 Waves and Sound
Glow in the dark items such as Halloween decorations are                 .
  1. fluorescent
  2. phosphorescent
  3. chemiluminescent
  4. bioluminescent
Grade 9 Waves and Sound

This question is a part of a group with common instructions. View group »

Which word best describes the relationship between wavelength and frequency?
  1. linear
  2. inverse
  3. variable
  4. exponential
Grade 9 Quantum Physics and the Atom
How many electrons would it take to equal the mass of a single proton or neutron?
  1. less than one, electrons are bigger than either
  2. 1,836 electrons
  3. 565 electrons
  4. 36 electrons
Grade 9 Forces and Motion
Torque is the product of
  1. radial distance and rotational speed.
  2. lever arm and force.
  3. mass and velocity.
  4. none of the above
Grade 9 Waves and Sound
A ray of light that travels towards a reflecting surface is the
  1. reflected ray.
  2. reflected surface.
  3. incident ray.
  4. none of the above.
Grade 9 Forces and Motion
An object is acted upon by a system of parallel forces causing the object to be in static equilibrium. Which of the following statements is not correct?
  1. The resistant of the parallel in zero
  2. The algebraic sum of all moments of the forces in zero
  3. All the parallel forces must be equal in magnitude and direction
  4. The sum of the forces in one direction must be equal to the sum of the forces in the opposite direction.
Grade 9 Forces and Motion
Why do roads are banked round curve?
  1. So that the centre of gravity of the vehicle will be low.
  2. To prevent vehicle from skidding of the road.
  3. To reduce the capital force.
  4. To prevent tires from wearing away too fast.
Grade 9 Heat Transfer
As measured on the Celsius scale, the temperature at which ice melts is
  1. -273ºC.
  2. 0ºC.
  3. 32ºC.
  4. 100ºC.
Grade 9 Waves and Sound
Sound travels faster though air than it does wood.
  1. True
  2. False
Grade 9 Forces and Motion
The distance traveled by a freely-falling body is proportional to
  1. the mass of the body.
  2. the square of the acceleration due to gravity.
  3. the square of the time of fall.
  4. the time of fall.
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