How many types of fundamental particles exist?
A.) 6.
B.) 12.
C.) 24.
D.) 30.
E.) 300.
Answer: D.) 30.
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A person approaches a plane mirror at a speed of 2 m/s. How fast does he approach his image?
A) 1 m/s B) 2 m/s C) 3 m/s D) 4 m/s E) 1 m/s
What is the primary purpose of an astronomical telescope?
A) to magnify and make distant objects appear closer B) to separate light into its component colors C) to measure the intensity of light very accurately D) to access wavelengths that we cannot see visually E) to collect a lot of light and bring it to a focus
A 5.0-?C point charge is placed at the 0.00 cm mark of a meter stick and a -4.0-?C point charge is placed at the 50 cm mark. At what point on a line joining the two charges is the electric field due to these charges equal to zero?
What will be an ideal response?
A 200-volt battery is connected to a 0.50-microfarad parallel-plate, air-filled capacitor. Now the battery is disconnected, with care taken not to discharge the plates. Some Pyrex glass is then inserted between the plates, completely filling up the space. What is the final potential difference between the plates? (The dielectric constant for Pyrex is ? = 5.6.)
What will be an ideal response?