A wheelbarrow is a good example of a second-class lever. True or False

What term do psychologists use to designate our personal awareness of feelings, sensations, and thoughts?

Ineed the answers for these promblems i have

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?