In this scenario it is easier to take a person to the water-pool than to transport the people in the air, as the person's strength is increased by water upwards:

$f_b \to m \to mg =person \\\\F_B \ in\ air = v\ & air\ g \\\\$

$=0.076 \times 1.225 \times 9.8 \\\\ =0.91238 \ N\\\\$

$F_B \ in \ water = v \& water \ g \\\\$

$=0.076 \times 1000 \times 9.8\\\\= 744.8 \ N\\$

6 0

2 years ago

Valence electrons determine an atom’s __________. a. mass c. atomic number b. chemical properties d. period Please select the be

Lemur [1.5K]

Hello,

Here is your answer:

The proper answer to this question is option B "<span>chemical properties".

Here is how:

</span>Electrons determine a atoms chemical properties mainly what its made of.

Your answer is B.

If you need anymore help feel free to ask me!

Hope this helps!

5 0

2 years ago

Read 2 more answers

Define the upper mantle and the lower mantle as well give both the thickness and temperature

defon

Answer:

Explanation:

because thats what I put and got it right

8 0

2 years ago

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wave

swat32

Answer:

0.203 micro meter

Explanation:

for destructive interference that appearsblack, use the formula

2 t = m λ / u (where m = 0 1 2 3 ... is order of minima)

where t = tickness,

u is the ref index = 1.32

Wavelenth λ = 535×10^-9 meter

for t (minimum) m = 1 (as m=0 is ruled out as t>0)

t = 1× 535×10^-9/2×1.32

t (min) = 202.65×10^-9 meter

t (min) = 0.203×10^-6 meter = 0.203 micro meter

6 0

3 years ago