Compare the amount of heat energy required to raise the temperature of 2 kg of water and 2 kg of iron 30 °C? Cp (water) = 4.184 ; Cp (iron) = 0.450 *

Amount of heat energy required by water is 251100 J

    Amount of energy required by iron is 4500 J

Explanation:

The heat required to raise the temperature of 2kg water at 30 degrees:

Q= mcΔT     (C= specific heat, ΔT change in temperature, m mass of the substance)

The specific heat capacity of water is given as 4.184

the specific heat capacity of iron is given as 0.45 AT 25 DEGREES

Q= 2 *1000*0.450*5  as (ΔT= 30-25)

    = 4500 J

Heat required by 2kg iron at 30 degrees

Q= 2*1000*4.184* 30

  = 251100 joules

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602