Please please help it due in an hour 1. A friend says there are two new moons during any given lunar cycle. Explain why you agree or disagree.
2. Calculate the number of days during any given lunar cycle when a waning crescent is visible. Show your work.
3. If a full moon is approximately Day 14 of the lunar cycle, what would the angle measure be for Day 22? Use your angle measure for a full moon to set up a proportion, and show your work and all units.

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.

looks like the answer is     c     to me!

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.