For a mirror with diameter 40 metres, where atmospheric seeing is 0.5 arcsec, how much gain can one get from adaptive optics correction in terms of angular resolution.
in previous submissions, the atmospheric seeing value was used for wavelength, why is this?

An electric current is flowing through the cord below.what will happen to this current if a magnet is brought near the cord? a. the electric current will stop flowing. b. it will exert a force on the voltage. c. the resistance of the wire will decrease. d. it will exert a force on the electric current.

The rocket is fired vertically and tracked by the radar station shown. when θ reaches 66°, other corresponding measurements give the values r = 32700 ft, r¨ = 85 ft/sec2, and θ˙ = 0.019 rad/sec. calculate the magnitudes of the velocity and acceleration of the rocket at this position.

What’s #16 asking me and how do i solve it?