Adiffraction grating gives a second-order maximum at as angle of 31° for violet light (λ = 4.0 × 102 nm). if the diffraction grating is 1.0 cm in width, how many lines are on this diffraction grating? /3]

In which of the following cases is work being done on an object? question 2 options: pushing against a locked door carrying a box down a corridor pulling a trailer up a hill suspending a heavy weight with a strong chain

The strong nuclear force acts over a small distance than the electrostatic force. true or false

2select the correct answer. javed suffers from a severe food allergy. which device should javed always carry? a. inhaler b. epi pen c. nebulizer d. insulin pen