Which of these is an example of a mechanical wave?

ocean waves

microwaves used to heat food

x-ray

light from a flashlight

save

How many dots must be added to the symbol to properly represent a standard nitrogen ion? a) 1 b) 3 c) 5 d) 8

Does heating a metal wire increase or decrease its electrical resistance? why?

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.