Aspaceship from a friendly, extragalactic planet flies toward earth at 0.201 times the speed of light and shines a powerful laser beam toward earth to signal its approach. the emitted wavelength of the laser light is 697 nm . find the light's observed wavelength on earth.

The wavelength of observed light on earth is 568.5 nm

Explanation:

Given that,

Velocity of spaceship

Wavelength of laser

We need to calculate the wavelength of observed light on earth

Using formula of wavelength

Hence, The wavelength of observed light on earth is 568.5 nm

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 .