Why there will be a change in the sole of the shoes after using many days?

Answers

Answer 1

Answer:

Answer:

See the explanation below

Explanation:

Due to the frictional force, this force acts in the opposite direction to the movement of the person's shoe. This force tends to wear the sole of any shoe. We must remember that the frictional force is defined as the product of the normal force by the coefficient of friction between surfaces.

For this case, it should be the coefficient of dynamic friction between the pavement and the material of the sole of the shoe

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Astronomy can best be described as a/an

Answers

as·tron·o·my- the branch of science that deals with celestial objects, space, and the physical universe as a whole. That's the definition hope it is what you need and that it helps:)

The study of heavenly bodies.

How that differs from astrophysics, astro dynamics, cosmology, etc., I'm not entirely sure.

What is the momentum of a 12,000 kg car moving at a speed of 40 m/s?

Answers

Momentum = (mass) x (speed)

Momentum = (12,000 kg) x (40 m/s)

Momentum = (12,000 x 40) kg-m/s

Momentum = 480,000 kg-m/s

The best example of heat transfer by convection is whenA. sunlight warms soil
B. a ceiling fan blows air
C. heat rises from a chimney

Answers

A). Heat travels from the sun to the soil by radiation.

B). A ceiling fan moving air around doesn't say anything about heat.

C). It's not heat rising from a chimney. It's heated air.
Whenever you see a heated substance rising through some of
the same substance that's cooler, you're seeing convection.

Why do automobiles rust more easily in wet climates than drier climates?

Answers

Wet climates obviously have more water than driers climates. Metals, when subject to water have the tendency to oxidize (rust). Therefore, if water is barely present in a climate, then oxidation is also least likely to occur.

Compare and contrast the general characteristics of a gas giant planet and one of the inner planets (such as Mercury, Earth, Venus or Mars)? Give two differences and one similarity.

Answers

The gas planets usually have extremely high gravitational pulls, the surface isn't solid (since its a gas planet), and gas planets are larger than the inner planets.
Similarities- These planets all have moons and they both revolve around the sun (obviously).

Hope this helps.

Which force changes Earth's surface most slowly?A) earthquake
B) erosion
C) volcano
D) landslide

Answers

erosion changes the earths surface slowly!
^_^...hope this helps!!!!

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A student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?A. The mass of the balloon increases because the size of the balloon has increased. B. The mass of the balloon increases because the temperature of the balloon has increased. C. The mass of the balloon stays the same because the gas inside the balloon still has same mass after it warms up.D. The mass of the balloon stays the same because warming decreases the mass enough to cancel out the effect of increasing the size. Please explain why you chose your answer