.It takes time 8 min 20 seconds for light to reach from sun to the earth surface. If speed of light is taken to be 3times10^(5)km/h. Find the distance of the sun from the earth in SI system.

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.)

5g of ammonium nitrate was dissolved in 60g of water in an insulated container. the temperature at the start of the reaction was 23.0°c and at the end it was 19.0°c. calculate the energy absorbed by the reaction.

Which lists the organs in the correct order as food passes from the mouth to anus?