What group is helium in? Group 2 or group 8?

Which is not a step in the rock cycle?

In a system, when potential energy decreases, then entropy also decreases. true false

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.