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| ՎԷԼԱՏԻՆ
ՍՏՆ ԱՅՆ (Խն
լոյ
1. A source emits 531.62-nm and 531.81-nm light. (a) What
minimum number of grooves is required for a grating that
resolves the two wavelengths in the first-order spectrum?
(b) Determine the slit spacing for a grating 1.31 cm wide
that has the required minimum number of grooves.

Tall pacific coast redwood trees can reach heights of about 100 m. if air drag is negligibly small, how fast is a sequola cone moving when it reaches the ground f it dropped from the top of a 100 m tree?

Need this now! do pilots live long

Consider a 1000 w iron whose base plate is made of 0.5 cm thick aluminum alloy 2024-t6 (ρ = 2770 kg/m3 and cp = 875 j/kg°c). the base plate has a surface area of 0.03 m2. initially, the iron is in thermal equilibrium with the ambient air at 22°c. assuming 90% of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 200°c.