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4 years ago

How thick is the Earth's surface?

Physics

2 answers:

ICE Princess25 [194]4 years ago

6 0

The Earth's thinnest is usually 10 km

marissa [1.9K]4 years ago

3 0

It is typically 30 km to 50 km thick.

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An airplane has wings, each with area A, designed so that air flows over the top of the wing at 265 m/s and underneath the wing

exis [7]

Answer

given,

Pressure on the top wing = 265 m/s

speed of underneath wings = 234 m/s

mass of the airplane = 7.2 × 10³ kg

density of air = 1.29 kg/m³

using Bernoulli's equation

$P_1 + \dfrac{1}{2}\rho v_1^2 = P_2 + \dfrac{1}{2}\rho v_2^2$

$\Delta P =\dfrac{1}{2}\rho (v_2^2-v_1^2)$

$\Delta P =\dfrac{1}{2}\times 1.29\times (265^2-234^2)$

$\Delta P =9977.5 Pa$

Applying newtons second law

2 Δ P x A - mg = 0

$A =\dfrac{mg}{2\Delta P}$

$A =\dfrac{7.2\times 10^3 \times 9.8}{2\times 9977.5}$

A = 3.53 m²

7 0

3 years ago

Please help me this is due today

Alex_Xolod [135]

Answer:

1) Acids have a sour taste.

Acid formulas start with "H", contain hydrogen and some react with active metals in a single replacement reaction to give off hydrogen gas.

An acid will turn blue litmus paper red

All acids are SOLUBLE in water.

Acids have a pH below 7.

2) Bases are bitter to taste a bitter taste is characteristic of all bases.

trong bases are very corrosive and can burn the skin.

Bases may or may not be soluble in water Bases that can dissolve in water are called alkalis

They can conduct electricity.

Bases lose their basicity when mixed with acids.

3) i dont know how to do it on here sorry but its self explanitory!!

4) 0-3 strongly

4-6 weakly

7 neutral

8-10 weakly

11-14 strongly

hydrochloric acid

lead acid battery

gastric acid

lemon juice

cola

vinegar

orange juice and apple juice

tomato juice

beer

tea or healthy skin

acid rain

coffee

urine

milk

healthy human saliva

pure water

blood

sea water

hand soap

household ammonia

bleach

house hold lye

Explanation:

4 0

3 years ago

Light of wavelength 648.0 nm is incident on a narrow slit. The diffraction pattern is viewed on a screen 57.5 cm from the slit.

boyakko [2]

Answer:

$71.0 \mu m$

Explanation:

The formula for the single-slit diffraction is

$y=\frac{n\lambda D}{d}$

where

y is the distance of the n-minimum from the centre of the diffraction pattern

D is the distance of the screen from the slit

d is the width of the slit

$\lambda$ is the wavelength of the light

In this problem,

$\lambda=648.0 nm=6.48\cdot 10^{-7}m$

$D=57.5 cm=0.575 m$

$y=1.05 cm=0.0105 m$ , with n=2 (this is the distance of the 2nd-order minimum from the central maximum)

Solving the formula for d, we find:

$d=\frac{n\lambda D}{y}=\frac{2(6.48\cdot 10^{-7} m)(0.575 m)}{0.0105 m}=7.10\cdot 10^{-5} m= 71.0 \mu m$

6 0

3 years ago

Match the definition with the correct term: column of hot, solid material that rises toward Earth’s surface from the deep mantle

Darina [25.2K]

1 is mantle plume, 2 is body wave, and 3 is Caldera

7 0

3 years ago

When the bowling ball has fallen halfway down the building (height = 20 m), it has a speed of 19.8 m/s.

Ghella [55]

Answer:

I think the answer is 19.8 potential energy

Explanation:

NONE.

3 0

3 years ago