ILL GIVE BRAINLIEST!! URGENT PLEASE HELP Red light has the wavelength of 6.55 X 10 ^-7m. What is its frequency in hertz.

1. 4.58 hz
2. 4.58x10^14hz
3.21.8 hz
4. 2.18x^10-15 hz

Describe how the fermi level changes with donor level, temperature and contact with p and n type semiconductors

The motor m applies a time-varying force of f (200 t) n, where t is in seconds. box b with mass 200 kg starts from rest, and the coefficients of kinetic and static friction are 0.2 and us 0.3 the acceleration due to gravity is g 9.8 m/s2 b 300 a) find the time ' when the box starts to move. b) calculate the speed of the crate at 3 s c) calculate the power delivered by the motor at t 3 s

Drag each item into the proper state of matter category.