The vertical displacement y(x,t) of a string stretched along the ...

[P68T]

The vertical displacement y(x,t) of a string stretched along the horizontal x-axis is given by y(x,t) = (6.00 mm) cos(3.25 m-1)x - (7.22 rad/s)t.
 
  (a) What is the minimum time for each complete cycle of the wave?
  (b) What is the distance between adjacent crests of the wave?
  (c) How fast does this wave travel?

Question 2

Two planets having equal masses are in circular orbit around a star. Planet A has a smaller orbital radius than planet B. Which statement is true?
 
  A) Planet A has more kinetic energy, more potential energy, and more mechanical energy (potential plus kinetic) than planet B.
  B) Planet A has more kinetic energy, less potential energy, and less mechanical energy (potential plus kinetic) than planet B.
  C) Planet A and planet B have the same amount of mechanical energy (potential plus kinetic).
  D) Planet A has more kinetic energy, less potential energy, and more mechanical energy (potential plus kinetic) than planet B.

[poopface]

Answer to Question 1

(a) 0.870 s (b) 1.93 m (c) 2.22 m/s

Answer to Question 2

B

[P68T]

Both answers were spot on, thank you once again

[poopface]

Great! Please up vote