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- 1. Question
Which of the following devices converts sound into electrical energy?
- 2. Question
Which of the following statements about viscocity are correct?
I. Viscocity opposes the gravitationa force on the ball
II. Viscocity opposes the upthrust on the ball
III. Viscocity is in the same direction as the upthrust on the ball
IV. The ball falls faster the more viscous the liquid is
- 3. Question
A charge of 1.0 x 10-5 coulombs experiences a force of 40N at a certain point in space. What is the electric field intensity?
- 4. Question
When a planet orbits the Sun, one of the foci of the elliptical orbit is
- 5. Question
What has an eccentricity of zero?
- 6. Question
A bar magnet is moved through a coil of wire. On which of the following factors does the induced emf depend?
I. The strength of the magnet
II. The speed of the magnet.
III. The number of turns in the coil
- 7. Question
A _________ is an engine or instrument that produces a great power, more power for its size than any other kine of engine consisting of a recovery device.