The speed of light in a vacuum is 3.00 × 108 m/s. enter your answer in scientific notation. (a) what is its speed in km/h? what is its speed in mi/min?

a is 1.08x10^9. the first person to answer was wrong :(

Explanation:

Answer :

(a) The speed in Km/hr is,

(b) The speed in mi/min is,

Solution :

The speed of light =

(a) Convert speed of light from m/s to Km/hr

conversions used :

(1 Km = 1000 m)

(1 hr = 3600 sec)

(b) Convert speed of light from m/s to mi/min

conversions used :

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.