Ten seconds after starting from rest, a freely-falling baseball ...

[Mr. Wonderful]

Ten seconds after starting from rest, a freely-falling baseball will have a speed of about
 
  A) 10 m/s.
  B) 50 m/s.
  C) 100 m/s.
  D) 500 m/s.
  E) more than 500 m/s.

Question 2

450 nm of light falls on a single slit of width 0.30 mm. What is the angular width of the central diffraction peak?
 
  A) 0.086
  B) 0.13
  C) 0.17
  D) 0.26
  E) 0.35

[yeungji]

Answer to Question 1

Answer: C

Answer to Question 2

C

[Mr. Wonderful]

TYSM

[nguyenhoanhat]

Excellent