Regions in the milky way where density waves have caused gas clouds to crash into each other are called

1 answer:

7 0

Regions in the milky way where density waves have caused gas clouds to crash into each other are called clumps.Clumps are molecular clouds (interstellar clouds) with higher density,where lots of dust and gs cores resides. These clouds are the beginning of stars.

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An apple is dropped out of a 12 meter-high tree. How fast will the Apple be moving right before it hits the ground

Monica [59]

Answer:

15.3 m/s

Explanation:

Given:

v₀ = 0 m/s

Δy = 12 m

a = 9.8 m/s²

Find: v

v² = v₀² + 2aΔy

v² = (0 m/s)² + 2 (9.8 m/s²) (12 m)

v = 15.3 m/s

8 0

4 years ago

The reactants for a certain chemical reaction are shown. Cu(NO3)2 + NaOH → Which of the following shows the correct product or p

valentinak56 [21]

Answer : The products of this reaction are, $Cu(OH)_2$ and $NaNO_3$

Explanation :

First we have to write the balanced chemical reaction.

$Cu(NO_3)_2+2NaOH\rightarrow Cu(OH)_2+2NaNO_3$

In this reaction, 1 mole of copper nitrate react with the 2 moles of sodium hydroxide to give 1 mole of copper hydroxide and 2 moles of sodium nitrate.

This reaction is a double displacement reaction.

Double displacement reaction : A type of reaction in which a positive cation and a negative anion of two reactants react to exchange their places to form two new products.

The general representation of this reaction is,

$XY+AB\rightarrow XB+AY$