The first law of thermodynamics is derived from which of the following law ? a.the law of conservation of energy b.the law of specific heat c.the ideal gas law d.the law of entropy

Answers 1

Explanation:

Thus 1st law of thermodynamics is derived from law of conservation of energy.

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एक समांतर श्रेणी के n पदों का योग n^2+4n है। श्रेणी का 15वाँ पद ज्ञात कीजिए
उत्तर:—

  • 15वाँ पद 33 है

क्रमशः—

→ Sn = n²+ 4n

→ S1 = 1² + 4(1)

= 1 + 4

= 5

→ S2 = 2² + 4(2)

= 4 + 8

= 12

→ S1 = a1 = 5

→ S2 = a1 + a2 = 12

→ 5 + a2 = 12

→ a2 = 12 - 5

→ a2 = 7

→d = a2 - a1 = 7 - 5 = 2

15वाँ पद = a + 14d

= 5 + 14(2)

= 5 + 28

= 33

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