- What is the connection between atomic mass unit and molar mass?

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What is the sum from n=1 to ∞ of (-1)^(n+1) π^(2n) / (2n+1)!? The company CREE claims their LEDs produce 303 lumens per watt. But can it really do that? Qd = 9 – P + P` + 3P``
Qst = -1 + 4p – P` – 5p``
with P(0) = 4 and P`(0) = 4? What is the solutions for these two problems??? Can anyone help me? Calculate the force a 70kg high jumper must exert on the ground to produce an upward acceleration 4.0 times the acceleration due to gravity?