The intensity of a spherical wave is defined as the power of the wave summed over an entire imaginary surface divided by the area of that imaginary surface. What relationship does this mean exists between intensity and wave amplitude

In which of the following is positive work done by a person on a suitcase

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.

A4.0-cm tall light bulb is placed a distance of 32.0 cm from a concave mirror having a focal length of 16.0 cm. determine the image distance