1 point 7. A small steel ball is dropped
from a low balcony. Ignoring air
resistance, which statement
describes its motion? *
1 It falls with constant acceleration,
2 It falls with constant speed.
3 It falls with decreasing speed.
4 It falls with increasing acceleration.

The two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656(red) and 486 (blue). light from a hydrogen lamp illuminates a diffraction grating with 500 lines per mm, and the light is observed on a screen 1.50 behind the grating. what is the distance between the first-order red and blue fringes?