A point on a wheel of radius 40 cm that is rotating at a constant ...

[audragclark]

A point on a wheel of radius 40 cm that is rotating at a constant 5.0 revolutions per second is located 0.20 m from the axis of rotation. What is the acceleration of that point due to the spin of the wheel?
 
  A) 0.050 m/s2
  B) 1.4 m/s2
  C) 48 m/s2
  D) 200 m/s2
  E) 0.00 m/s2

Question 2

The wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the n = 2 state to the ground state is closest to which of the following values?
 
  (c = 3.0  108 m/s, h = 6.626  10-34 J  s, 1 eV = 1.60  10-19 J)
  A) 122 nm
  B) 203 nm
  C) 243 nm
  D) 389 nm
  E) 411 nm

[joanwhite]

Answer to Question 1

D

Answer to Question 2

A

[audragclark]

TY

[joanwhite]

You're welcome