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muminat
3 years ago
15

Why do you think that most of your body is made of this material?

Physics
1 answer:
antoniya [11.8K]3 years ago
7 0

Answer:

Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium.

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An electron is projected with horizontal speed 105m / s in a downwardly directed 304N / C electric field. Find the vertical posi
Vinil7 [7]

Answer:

-107 m

Explanation:

Sum of forces in the y direction:

∑F = ma

-qE = ma

a = -qE/m

a = -(1.60×10⁻¹⁹ C) (304 N/C) / (9.11×10⁻³¹ kg)

a = -53.4×10¹² m/s²

Given in the y direction:

v₀ = 0 m/s

a = -53.4×10¹² m/s²

t = 2×10⁻⁶ s

Find: Δy

Δy = v₀ t + ½ at²

Δy = (0 m/s) (2×10⁻⁶ s) + ½ (-53.4×10¹² m/s²) (2×10⁻⁶ s)²

Δy = -107 m

4 0
3 years ago
Which is an example of a chemical change?
Mashutka [201]

Answer:

Burning wax

Explanation:

because in burning, wax reacts with oxygen present in the surrounding and forms carbon dioxide and ash

7 0
3 years ago
Read 2 more answers
________ is a measure of how many waves pass by in one second.
Sergio [31]
C. Frequency is a measure of how many waves pass by in one second.
4 0
3 years ago
If the mass of the cement is 15 000 kg, calculate the density of this cement sample in kgm-3
MrRa [10]

Explanation:

Hi there!

Mass of the container (m) = 15000 kg

Also from the figure;

Volume of the container (V) = l*b*h

{ From figure length = 2m , breadth = 1.1m, height = 2.5m}

So,

V = (2*1.1*2.5) m³

= 5.5m³

Then;

Density (d) = m/v

= 15000/5.5

= 2727.27 kgm³

Therefore, the density is 2727.27 kgm³.

Hope it helps!

5 0
2 years ago
What would you predict for this elephant's stride frequency? That is, how many steps per minute will the elephant take?
Sonja [21]
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8 0
3 years ago
Read 2 more answers
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