The steam turbine has an efficiency of 40.0%. A O steam engine has of 25.0%. Suppose both devices are provided
with 1000J of thermal energy. How much more useful work.
will the steam furbine do? Show your work.

Pleasssee help please

Hydrogen and helium are both members of?

Acertain radio station broadcasts radio waves that have a wavelength of 298cm what is its broadcast frequency?

To place a communications satellite into a geosynchronous orbit at an altitude of 22,240 mi above the surface of the earth, the satellite first is released from a space shuttle , which is in a circular orbit at an altitude of 185 mi, and then is propelled by an upper-stage booster to its final altitude. as the satellite passes through a, the booster's motor is fired to insert the satellite into an elliptic transfer orbit. the booster is again fired at b to insert the satellite into a geosynchronous orbit. knowing that the second firing increases the speed of the satellite by 4810ft/s, determine (a.) the speed of the satellite as it approaches b on the elliptic transfer orbit, (b.) the increase in speed resulting from the first firing at a.