a fusion reaction takes place between carbon and another element. neutrons are released, and a different element is formed. the different element
a) lighter than helium.
b) heavier than helium.
c) used for energy on earth.
d) radioactive.

c number is right answer of the following terms

Lighter than helium

Explanation:

A fusion reaction takes place between carbon and another element. Neutrons are released, and a different element is formed. The different element is Lighter than helium. so the correct answer to the question is option C, among all the options.

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answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.