All of the various light
waves move with the same speed, a value
<span>abbreviated (c) equal to 3.00
× 108 m/s. The frequency ([1]) that light waves
pass a given point is</span>
measured in waves/second or
simply ‘per second’ (1/s).
the frequency of the wave f =
(3.00 × 10^8 m/s)/ 2.340 m
<span>f = 1.28x10^8 Hz</span>
Answer:
i believe it is lithium cause its is used for batteries and potassium is in like foods right? lmk if im wrong
and potassium helps to protect from radiation
Explanation:
Answer:
See explanation
Explanation:
All the substances in the mixture; sodium chloride ,lead II oxide and iron filings are solids.
The first step is to use a magnet to separate the iron fillings which is a magnetizable material.
The remaining part of the mixture is now dissolved in water. Lead II oxide is insoluble in water while sodium chloride is very soluble in water hence a filtrate and a residue are obtained.
The residue is lead II oxide which can be dried to recover the solid. The filtrate contains sodium chloride which is recovered by evaporating the solution to dryness.
To determine the mass of the sample, first find the volume difference after and before the aluminum was placed, the volume change is equal to the volume of the submerged object, in this case aluminum.
Then knowing volume of aluminum and the density of it, we can solve for the mass.
D = m/v
Dv = m
2.7 g/ml • 8 ml = 21.6 grams.
I'm like 99% sure its one week
