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4 years ago

Is the world really going to end Saturday

1 answer:

8 0

Nope, this was confirmed by NASA senior space scientist David Morrison to be a hoax.
There's no such thing as Planet X / Nibiru.
There is no brown dwarf planet on a crash course with Eath.

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How are Newton's three laws of motion related

OLga [1]

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

6 0

3 years ago

Read 2 more answers

Which statement about astrology is not true? the positions of the planets at the time of birth have influence on a persons life

Anna71 [15]

Answer:

The positions of the planets at the time of birth have influence on a person's life

7 0

3 years ago

At what temperature would a 1.30 m NaCl solution freeze, given that the van't Hoff factor for NaCl is 1.9? Kf for water is 1.86

Setler [38]

Answer:

-4.59°C

Explanation:

Let's see the formula for freezing point depression.

ΔT = Kf . m . i

ΔT = Freezing T° of pure solvent - Freezing T° of solution

Kf = Freezing constant. For water if 1.86°C/m

m = molality (moles of solute in 1kg of solvent)

i = Van't Hoff factor.

0°C - Freezing T° of solution = 1.86°C /m . 1.30m . 1.9

Freezing T° of solution = - (1.86°C /m . 1.30m . 1.9)

Freezing T° of solution = - (1.86°C/m . 1.30m . 1.9) → -4.59°C

NaCl → Na⁺ + Cl⁻

4 0

3 years ago

Having dimples is a dominant trait represented by the allele "D". If Carlos has dimples, which of the following could represent

Zigmanuir [339]

Answer:

DD or Dd

Explanation:

Having dimples is the dominant trait which means if he is heterozygous, the dominant trait will still show. So it can be homozygous dominant or heterozygous.

7 0

3 years ago

Read 2 more answers

Classify which compounds will dissolve in water and which ones will not dissolve in water.

vredina [299]

Answer:

Dissolves in water: Acetone, 1-propanol, Methanol

Do not dissolve in water: Hexane, Decane

Explanation:

From the principle that like dissolves like,polar substances will dissolve in polar solutions, while non-polar substances will dissolve in non-polar substances.

Water is a polar solution, therefore, polar substances will dissolve in it.From the given options:

Acetone is a polar molecule, therefore, it will dissolve in water.

1-propanol is a polar molecule, therefore, it will dissolve in water.

Hexane is a non-polar molecule, therefore, it will not dissolve in water.

Methanol is a polar molecule, therefore, it will dissolve in water.

Decane is a non-polar molecule, therefore, it will not dissolve in water

6 0

3 years ago