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3 years ago

5

Adhesion is when forces of the molecules are more strongly drawn to each other than the molecules in other substances true or fa

lse

1 answer:

SSSSS [86.1K]3 years ago

6 0

Answer:

False

Explanation:

that is cohesion. adhesion is force between dissimilar molecules of a body

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What are the factors that effect the strength of a frictional force???

seropon [69]

If you write down the formula for friction, you will get an answer.

Ff = u * N Where N is a push down force that an object experiences.

u (mu) is a constant and has no units

It may not be accelerating and still experience friction. A is not correct.

Color and Density will not affect the frictional force. B is not so.

Buoyant forces are a different thing altogether. Generally friction has nothing to do with them. C is incorrect.

The last one is your answer. Technically mg should be the answer and not mass, but the second part is correct.

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3 years ago

Which statement is true regarding a chemical reaction?

liberstina [14]

Answer:

The total number of atoms does not change, so mass is conserved in the reaction.

Explanation:

If you like my answer than please mark me brainliest thanks

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2 years ago

What is an earth revolution, what shape is it's path, and how long does it last?

zaharov [31]

An Earth revolution is a trip around the sun in a closed path (relative to the sun).

The path is very nearly an ellipse with the sun at one focus, and a little less nearly a circle with the sun at the center.

One complete revolution takes roughly 365.24 days, and at that point, the Earth immediately begins another one.

We have a special word that we use to refer to that special period of time. In English, it's called a "year".

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3 years ago

Help me, this is my last question pls.

Cloud [144]

If resultant force on the body is 0 the acceleration will also be 0.

<h3>What is acceleration?</h3>

The term "acceleration" refers to the change in velocity with time. We must also recall that force is the product of mass and acceleration. If that is so, we can write; F = ma.

Now, we are told that the force on the body is zero so making the acceleration the subject of the formula; a = 0/mand a = 0.

Hence, if resultant force on the body is 0 the acceleration will also be 0.

Learn more about acceleration: brainly.com/question/2437624

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3 years ago

Read 2 more answers

Two planets having equal masses are in circular orbit around a star. Planet A has a smaller orbital radius than planet B. Which

vova2212 [387]

Answer:

Explanation:

To solve this, we must know two things.

First, the force of gravity acting on an orbiting object is equal to its mass times centripetal acceleration.

Second, the force of gravity between two objects is defined by Newton's law of universal gravitation: Fg = mMG/r², where Fg is the force of gravity, m and M are the masses of the objects, G is the universal constant of gravitation, and r is the distance between the objects.

Therefore:

Fg = m v²/r

mMG/r² = m v²/r

v² = MG/r

The potential energy of each planet is:

PE = mgr = m (MG/r²) r = mMG/r

The kinetic energy of each planet is:

KE = 1/2 mv² = 1/2 m (MG/r) = 1/2 mMG/r

The total mechanical energy is:

ME = PE + KE = 3/2 mMG/r

Since both planets have the same mass, the only difference is the orbital radius. Since planet A has a smaller orbital radius, it has more potential energy, more kinetic energy, and more mechanical energy.

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3 years ago