Can some help with this? id appreciate your help :)

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

The frequencies refer to the sample data collected from a population of interest when performing a hypothesis test comparing two or more population proportions.

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.