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2 years ago

What properties are emergent properties of a substance and not properties of its individual particles?

Physics

1 answer:

kirza4 [7]2 years ago

7 0

Answer and Explanation:

Emergent properties are in general those which are associated to a group of item- a system- but you would not find in any of the individual parts of the system. For example, in chemistry a compound consists in atoms of elements bonded each other. The compound have properties as color, density, etc. that the individual elements do not have. A very clear example is sodium chloride (NaCl) a compound which is made of sodium ions (Na⁺) and chloride ions (Cl⁻). Sodium chloride is a white solid, and tastes salty, but neither sodium or chloride tastes salty. In fact, sodium is a soft metal and a chlorine solution is light yellow. Separately, the constituting elements are quite different to the compound itself.

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Can some one help me with this question its hard :( down below ill give brainliest

eduard

Answer: B

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2 years ago

A rocket is fired straight up. It contains two stages (Stage 1 and Stage 2) of solid rocket fuel that are designed to burn for 1

insens350 [35]

Answer: a) 1875m. (b) 8.66s

Explanation:

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3 years ago

Which energy changes take place when a pedalling cyclist uses a generator (dynamo) to light his bicycle lamp?

Elina [12.6K]

Answer: chemical → kinetic → electrical → light

Explanation: At the same time when the generator lights up the bicycle lamp the lamp lights up using electrical energy so mechanical energy is also transformed into electrical energy.

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1 year ago

What’s the velocity of a car traveling 144km in 90 minutes per hour

S_A_V [24]

Answer:

96 mph

Explanation:

There are a couple of ways of doing this, but I will just use a proportion.

first off 1 hour = 60 minutes.

So 144/90 = x/60 will give me the answer per 60 minutes of miles per hour.

cross multiply to get 90x = 8640

divide by 90 to get 96 miles per 60 minutes or 96 mph.

Hope this helped.

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3 years ago

A crash test dummy with a mass of 55kg is placed into a car traveling at 40m/s. During the first trial the dummy does not wear a

s2008m [1.1K]

a. The force experienced by the dummy with a seatbelt is 11,000 Newton.

b. The force experienced by the dummy without a seatbelt is 4,400 Newton.

<u>Given the following data:</u>

Mass = 55 kg

Initial velocity = 0 m/s

Final velocity = 40 m/s

Time A = 0.2 seconds

Time B = 0.5 seconds

a. To calculate the force experienced by the dummy with a seatbelt:

<h3>Newton's Second Law of Motion</h3>

In order to solve for the force acting on the dummy, we would apply Newton's Second Law of Motion.

<u>Note:</u> The acceleration of an object is equal to the rate of change in velocity with respect to time.

Mathematically, Newton's Second Law of Motion is given by this formula;

$F = \frac{M(v\;-\;u)}{t}$

Substituting the given parameters into the formula, we have;

$F = \frac{55(40\;-\;0)}{0.2}\\\\F = \frac{55\times 40}{0.2}\\\\F = \frac{2200}{0.2}$

Force = 11,000 Newton.

b. To calculate the force experienced by the dummy without a seatbelt:

$F = \frac{55(40\;-\;0)}{0.5}\\\\F = \frac{55\times 40}{0.5}\\\\F = \frac{2200}{0.5}$

Force = 4,400 Newton.

Read more on force here: brainly.com/question/1121817

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2 years ago