Heat transfer between two substances is affected by specific heat and the a. chemical composition of the substances.
b. state of matter of the substances at room temperature.
c. thermal equilibrium of the substances.
d. amount of time and area of physical contact between the substances.

Option D

Explanation: Heat transfer can be defined as the amount of heat that is transferred between two objects.

Heat transfer stops when the temperature of the two objects becomes same. Then there is no heat transfer and objects are in equilibrium.

There are many factors on which heat transfer depends. The first factor is specific heat of substance and the second factor is the amount of time for which the two substances are kept in contact with each other.

answer: blah

explanation:

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step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.