1. All electromagnetic waves can undergo reflection. a. State three properties common to all electromagnetic waves. b. Microwaves produced by a source travel at a speed of 3.0 x 10^8 m/sec and frequency of 1.5 x 10^10 Hz in vacuum. Calculate the wavelength of these microwaves. Mark the position of the waves in the following fig:

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 current is 0.6

voltage ÷ resistance = current

so 12 ÷ 20 = 0.6

prndulum needs thread, weight clock to time swings