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borishaifa [10]

3 years ago

13

New material is created at which of these types of plate boundaries?

2 answers:

adelina 88 [10]3 years ago

6 0

Answer:

Option (B)

Explanation:

The new materials are created along the mid-oceanic ridge in a divergent plate boundary.

In a divergent plate motion, the two plates move in the opposite direction. As a result of which the magma rises and comes out to the surface, that immediately cools and forms basaltic rocks and lavas. This adds new materials to the ocean floor along the mid-oceanic ridge. The rocks near the mid-oceanic ridge are the youngest and the rocks that are away from the mid-oceanic ridge are the oldest. This type of plate boundary is also known as the constructive plate boundary.

Hence, the correct answer is option (B).

MA_775_DIABLO [31]3 years ago

4 0

transform

new mats caused by intense forces and heat

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A force of 20.0 N is applied to a 3.00 kg object for 4.00 seconds. Calculate the impulse experienced by the object.

GenaCL600 [577]

Answer:

Impulse = 80Ns

Explanation:

Given the following data;

Mass = 3kg

Force = 20N

Time = 4 seconds

To find the impulse experienced by the object;

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The loudness l of a sound, measured in decibels, is given by l=10log10r, where r is the sound's relative intensity. suppose one

marishachu [46]

Answer

given,

I is the loudness of sound

I = 10 Log₁₀ r

r is relative intensity

at when relative intensity is 10⁶

I = 60 dB

how much louder when 100 people would be talking together

I = 10 Log₁₀ r

I = 10 Log₁₀ (10⁶ x 100)

I = 10 Log₁₀ (10⁸)

I = 80 dB

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3 years ago

A 1.2 kg ball drops vertically onto a floor from a height of 32 m, and rebounds with an initial speed of 10 m/s.

iren [92.7K]

Explanation:

Given that,

Mass of the ball, m = 1.2 kg

Initial speed of the ball, u = 10 m/s

Height of the floor from ground, h = 32 m

(a) Let v is the final speed of the ball. It can be calculated using the conservation of energy as :

$\dfrac{1}{2}mv^2=mgh$

$v=\sqrt{2gh}$

$v=\sqrt{2\times 9.8\times 32}$

v = -25.04 m/s (negative as it rebounds)

The impulse acting on the ball is equal to the change in momentum. It can be calculated as :

$J=m(v-u)$

$J=1.2\times (-25.04-10)$

J = -42.048 kg-m/s

(b) Time of contact, t = 0.02 s

Let F is the average force on the floor from by the ball. Impulse acting on an object is given by :

$J=\dfrac{F}{t}$

$F=J\times t$

$F=42.048\times 0.02$

F = 0.8409 N

Hence, this is the required solution.

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2 years ago

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chubhunter [2.5K]

Answer:

Short answer, because copper wire does not have high resistance.

Explanation:

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