What could happen if earth had two moons? a. there would be more spring tides in a year b. tides would be bigger c. there would be more high tides each day d. all of the above

D) All of the above

Yes, that is the answer, honestly it is the only one that makes most sense to me

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how important do you think an instrument is to the musician who plays it?

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.