600-nm light is incident on a diffraction grating with a ruling separation of 1.7 10 m. the second order line occurs at a diffraction angle of: 42 45° 21° 10°

45°

Explanation:

λ = 600 nm = 600 x 10^-9 m

d = 1.7 x 10^-6 m

For second order, N = 2

Use the equation

d Sinθ = N λ

1.7 x 10^-6 x Sinθ = 2 x 600 x 10^-9

Sinθ = 0.706

θ = 45°

Thus, the angle of diffraction is 45°.

answer: the rock sample is a sedimentary rock.

explanation:

it is given that:

mass of rock sample, m = 2.7 g

volume of rock sample,

so, density of rock sample will be

since, the density of rock sample is . hence, the rock sample is a sedimentary rock, whose densities varies between .

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.