物理常识2（Physics knowledge 2）.docVIP

物理常识2（Physics knowledge 2） 1, hanging on the wall of the clock on the wall, when the battery power depletion and stopped, the second hand often stop on the dial 9 position. This is due to the hindrance by the second moment in the 9 position of the maximum. 2, sometimes the water pipe in the adjacent tap water, occasional bursts of noise. This is due to the resonance of the water pipe when water runs out of the tap 3, to take pictures of the TV screen, you should turn off the camera flash and indoor lighting, so that the picture is more clear picture. The reflected light on the TV screen interferes with the transmission light of the TV screen because of the flash and the lighting 4. Frozen pork thawed faster in the water than in the same temperature. Burn the nails in the water than the cooling at the same temperature air. A cup with boiling hot water is immersed in water faster than in a temperature air. These phenomena indicate that heat transfer of water is better than air, 5, the pot filled with cold water, the outer surface of the bottom of the water on the flames attached long time to be burned, and until Shaogan not boiling, this is because the water droplets, pot and a pot of water to keep the three heat conduction, temperature is roughly the same, as long as the pot of water without boiling, water will not boil. Water droplets in the flame by evaporation and gradually burned dry, 6, the shape of the mirror, the farther away from the mirror, the more out of shape. Because the mirror as if by the mirror after the silver surface reflection formed, silver plated surface uneven or glass thickness uneven, will produce aliasing. The shape of a mirror, the farther away from the mirror, from the light amplification principle, the silver surface of the reflected light reaches the position of deviation from the normal position is greater, the more the mirror out of shape The side jet nozzle 7, natural gas furnace has several holes communicated with the outside, but not