A single-engine helicopter has two rotors; a main rotor and a tail rotor. The main rotor has a diameter of 14.6 m and rotates at the rate of 480 rev/min while the tail rotor with a diameter of 1.84 m rotates at 3875 rev/min. What are the speeds, in m/s, of the tips of each rotor

Gather reliable information to brent make his decision. to gather this information, use newspapers, call insurance companies or look at their web sites, and review consumer magazines and web sites. also, look at the manufacturer web site or for information about gas mileage. list the sources you use and take notes.

As part of your daily workout, you lie on your back and push with your feet against a platform attached to two stiff springs arranged side by side so that they are parallel to each other. when you push the platform, you compress the springs. you do an amount of work of 79.0 j when you compress the springs a distance of 0.230 m from their uncompressed length. (a) what magnitude of force must you apply to hold the platform in this position? (b)how much additional work must you do to move the platform a distance 0.230 m farther? (c) what maximum force must you apply to move the platform a distance 0.230 m farther?

What component of earth’s atmosphere exists entirely as a result of photosynthesis?