Kvant
Miscellany

Three questions in physics

Kvant 1970, No. 3p. 47Tag A7CW

Rough automatic draft, low quality: expect mistakes and awkward wording. It will be replaced by a better translation. Original →

47

THREE QUESTIONS
IN PHYSICS

  1. Wet snow fell. How can you determine the percentage of water in it?

  2. A black board moves along a smooth horizontal table with speed vv. What formula should chalk be left on it, thrown horizontally at a speed and perpendicular to the movement of the board?

  3. Christmas tree garland made of light bulbs for a flashlight. When this garland is turned on, three volts are applied to each of the bulbs. Why is it dangerous to stick your finger into the socket after unscrewing one of the light bulbs?