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Eleventh Grade (Grade 11) Physics Questions

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Grade 11 Fluid Mechanics
A                 is a substance used to reduce the surface tension of water.
  1. surfactant
  2. toner
  3. coolant
  4. effervescent
Grade 11 Forces and Motion
A scalar has
  1. magnitude and direction.
  2. velocity.
  3. only direction.
  4. only magnitude.
Grade 11 Fluid Mechanics
Which of the following is not an example of laminar flow?
  1. a river moving slowly in a straight line
  2. smoke rising upward in a smooth column through air
  3. water flowing evenly from a slightly opened faucet
  4. smoke twisting as it moves upward from a fire
Grade 11 Fluid Mechanics
For an ideal fluid in the pipe in the below image, where will the lowest pressure occur?
  1. At location A
  2. At location B
  3. At location C
  4. Pressure is constant
Grade 11 Nuclear Physics
Einstein's mass-energy equivalence theory supports understanding of which type of nuclear reaction?
  1. spontaneous decay
  2. nuclear fission
  3. nuclear fusion
  4. transmutation
Grade 11 Light and Optics
If a light ray strikes a mirror at 75 degrees, at what angle will it reflect back?
  1. 25 degrees
  2. 15 degrees
  3. 75 degrees
  4. 90 degrees
Grade 11 Forces and Motion
The speed at any given time is called the
  1. velocity.
  2. average speed.
  3. instantaneous speed.
  4. all of the above.
Grade 11 Forces and Motion
When no horizontal force acts on a projectile, the horizontal velocity
  1. remains constant.
  2. increases.
  3. decreases.
  4. equals zero.
Grade 11 Fluid Mechanics
Which of the following statements describes form drag?
  1. As a body pushes against a fluid, the fluid pushes back against the body.
  2. When a body moves along a surface, some fluid is displaced to form a wave.
  3. As a body moves through a fluid, its surface catches a layer of fluid slowing it down.
  4. When a body moves through a fluid, some fluid attaches to the surface and slows down. SHOW ANSWER
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