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3 years ago

Explain why a construction worker who uses a jackhammer on a rock does not produce a metamorphic rock.

2 answers:

6 0

Using a jackhammer on a rock does not change its structure, just breaks it into smaller pieces. Changing the crystalline structure requires partial or complete melting of the rock (must be hot enough to allow atomic rearrangement

Law Incorporation [45]3 years ago

5 0

The answer is:

-when Jackhammer is a huge hammer used to breaking up the hard rocks and the hard materials to smaller pieces.

-and the metamorphic rocks are type of rocks which change to metamorphic rock by heating and high pressure so, the chemical and physical properties of the rock will be changed.

-and here in cause of using the Jackhammer there is no change in the chemical or physical properties of the original rock and no high temp(more than 200°C ) or high pressure to change to metamorphic rock . It is just a breaking up of the rock to small parts.

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Gravity causes all falling objects to accelerate at a rate of 98 m/s2.<br> O True<br> O False

aleksandrvk [35]

It’s true the acceleration of falling objects on earth due to gravity is 98ms2

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3 years ago

A 0.20-kg mass is oscillating on a spring over a horizontal frictionless surface. When it is at a displacement of 2.6 cm for equ

valentinak56 [21]

Explanation:

The given data is as follows.

mass = 0.20 kg

displacement = 2.6 cm

Kinetic energy = 1.4 J

Spring potential energy = 2.2 J

Now, we will calculate the total energy present present as follows.

Total energy = Kinetic energy + spring potential energy

= 1.4 J + 2.2 J

= 3.6 Joules

As maximum kinetic energy of the object will be equal to the total energy.

So, K.E = Total energy

= 3.6 J

Also, we know that

K.E = $\frac{1}{2}mv^{2}_{m}$

or, v = $\sqrt{\frac{2K.E}{m}}$

= $\sqrt{2 \times 3.6 J}{0.2 kg}$

= $\sqrt{36}$

= 6 m/s

thus, we can conclude that maximum speed of the mass during its oscillation is 6 m/s.

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3 years ago

Why are the surface features of the moon essentially unaltered since youth

zmey [24]

Because there is no wind, rain, snow, sleet, or people to wear them down,
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3 years ago

What is a goal of the planned missions MIRI? <br>the answer is to explore the kupier belt

VMariaS [17]

Answer:

Its goal is to explore the Kupier Belt, a region in space where comets originate

Explanation:

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3 years ago

Create a list of at least five different shapes of signs. For each of the five items on your list, identify two specific signs.

Nitella [24]

Hey bud, Good to see you again!

Okay so lets get to work huh? :D

Circle - Railroad advance warnings, and some bus signs.
Octagon - Stop signs, and slow signs (for flooding on roads).
Triangle - People crossing, People working.
Square - parking, speed limit.
Diamond - Bicyclist, animal crossing.

Hope this helped. Have a great day!

5 0

4 years ago

Read 2 more answers