Abeam of light traveling in air is incident at an angle of 30.0 and is reflected in the glass at an angle of 21.0 with the normal. find the index of refraction og the glass

Asmall metal bar, whose initial temperature was 10° c, is dropped into a large container of boiling water. how long will it take the bar to reach 70° c if it is known that its temperature increases 2° during the first second? (the boiling temperature for water is 100° c. round your answer to one decimal place.) sec how long will it take the bar to reach 98° c? (round your answer to one decimal place.)

The plum pudding model of the atom state that ?

What is created when solids,liquids,an gases mix with one another