Which of these substances is an example of a mixture? a. water b. aluminum c. air d. table salt which element is present in the compounds for ammonia and baking soda? a. hydrogen b. magnesium c. chlorine d. carbon

An architect plans to use solar energy to heat the next house he designs. what principle of absorption and infrared energy can be applied to the design of the new house? how could she apply to those principals?

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.

Acamcorder has a power rating of 20 watts. if the output voltage from its battery is 9 volts, what current does it use?