1.) A 2 kg rock handing from a scale is lowered and submerged into a 4 gallon container of water. The rock displaces an amount of water equal to 3 Newton's. What is the apparent weight shown on the scale for the submerged rock?
2.) A rectangular block at sea level and normal atmospheric pressure and a temperature of 20 degrees Celsius takes up 4 cubic meters of space. What is the upward force exerted on the block by the atmospheric pressure?
3.) Busy street traffic is at a sound level of 70 dB. A race car is 1000 times louder. What is the sound level in dB's of the race car?
4.) What is the electrical force between a two charges that each has a charge value of .0004 C each that are 2 meters apart?
5.) If you use a wall air conditioner unit that uses 1200 W of power in a 120 V circuit, and energy costs $ 0.11 per kw/hour, how much will it cost to use the air conditioner for one complete day (24 hours)?