How to remember electro magnetic spectrum?

Suppose a comet has an orbital period of 309.1 years around the sun. what is it’s average distance from the sun?

Which levels of government establish and implement educational requirements for minors

An ideal otto cycle has a compression ratio of 10.5, takes in air at 90 kpa and 40°c, and is repeated 2500 times per minute. using constant specific heats at room temperature, determine the thermal efficiency of this cycle and the rate of heat input if the cycle is to produce 90 kw of power.