An electron has the same de Broglie wavelength as a 1.8 eV ...

[TFauchery]

An electron has the same de Broglie wavelength as a 1.8 eV photon. The speed of the electron is closest to:
 
  A) 1,100 m/s
  B) 980 m/s
  C) 910 m/s
  D) 840 m/s
  E) 770 m/s

Question 2

A Carnot engine operates between reservoirs at 550K and 300K, discarding 1500 J of heat in each cycle.
  (a) What is the engine's efficiency?
  (b) How much heat is supplied to the engine by the hot reservoir in each cycle?
 
  What will be an ideal response?

[fauacakatahaias]

Answer to Question 1

A

Answer to Question 2

(a) 45.5 (b) 2750 J

[TFauchery]

Both answers were spot on, thank you once again

[fauacakatahaias]

Great! Please up vote