All of its output energy is absorbed in a detector that measures a total energy of 0.54 JJ over a period of 33 ss . How many photons per second are being emitted by the laser? Express your answer using two significant figures.

7.84 x 10¹⁶ photons/s

Explanation:

Given,

Total energy = 0.54 J

Period = 33 s

Photons per second = ?

Wavelength of the Photon = 989 nm

Energy of  single photon:

Total energy

Time period

Energy absorbed per sec

Energy of a photon photon

Number of photons emitted per second is

Number of photons = 7.84 x 10¹⁶ photons/s

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 .

the independent variable, or the one that is intentionally manipulated is the speed.