3 years ago

Supersonic flight can cause molecules on the surface of an airplane to break

Chemistry

1 answer:

MAVERICK [17]3 years ago

6 0

I think it’s , D. This can cause sonic booms that can damage building structures

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The alkline earth metals include?

patriot [66]

Answer:

The Popular ones are five in number

Explanation:

Calcium

Silicon

Germanium

Tin

Lead

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Photographs are taken of falling drops of two different liquids: Liquid X Liquid Y Note: the drops have identical volumes. Notic

aliina [53]

Answer:

See explanation

Explanation:

The reason why the droplets are spherical is the surface area to volume ratio of the falling droplet in a gravitational field. Recall that a sphere has a small surface area to volume ratio.

Between X and Y, one key difference that will define the rate at which the two drops of liquid falls is the viscosity of the fluid. Since the images were not attached, I can not really tell what liquid droplet is more flatter than the other.

However, the liquid with a greater surface tension will form larger droplets and experience a greater air resistance as the droplet falls. Hence the less the surface tension, the flatter the droplets. Cohesive forces pull molecules of a liquid droplets inwards leading to a more spherical shape and reducing the surface area. Surface tension is therefore the reason why liquids form droplets.

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3 years ago

A solution with a pH of 8 is _____. a. neutral b. basic c. acidic

Rasek [7]

Answer: basic

Explanation:

pH is the measure of acidity or alkalinity of a solution.

pH is measured by taking negative logarithm of hydrogen ions concentration.

$pH=-log[H^+]$