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3 years ago

Please help me with this question someone

Physics

2 answers:

Gekata [30.6K]3 years ago

8 0

From the answers provided, I believe the possible answer would be the last option, silicon, oxygen, and one or more metals. Here's my reasoning: the most abundant mineral group found in the Earth's crust is the silicate group. The silicate materials contain both oxygen and silicon. Silicates are the most common minerals in the rock-formation process, and it has, in fact, been estimated that they make up 75 to 90 percent of the Earth's crust. From this piece of evidence, I can guess that the answer will possibly be D, silicon, oxygen, and one or more metals.
It should also be noted that the additional elements that combine with the silicon-oxygen tetrahedron are involved with the other elements commonly found in the Earth's crust and mantle. They are aluminum, calcium, iron, magnesium, potassium and sodium.

Marianna [84]3 years ago

5 0

The last option, silicon, oxygen, and one or more metals

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Answer:

v = 3.08 km/s

Explanation:

Given that,

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Let v is the velocity of the satellite. It can be calculated as :

$v=r\omega\\\\v=(36000\times 10^3+6400\times 10^3)\times 7.27\times 10^{-5}\\\\v=3082.48\ m/s\\\\v=3.08\ km/s$

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2 years ago

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2 years ago

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Here are the answers to the question. Make sure to give a valid reason, please.

A. the sum of the protons and neutrons in one atom of the element.

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3 years ago

A block of mass 5 kg is descending with a constant velocity on an inclined plane at 30°. What is the value of the frictional for

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2 years ago

A 200g(m2) mass is pulling the cart (m1) across the table as shown below. If it covers 1.12m in 4.8 seconds starting from rest,

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Answer: 20.21 kg

Explanation:

The mass hanging from the pulley is pulling the cart. The force by which cart is being pulled is equal to weight of the hanging mass.

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Since there is no other force acting on the cart and there is no friction, so this force will pull the cart.

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From the equation of motion,

s = u t + 0.5 × a t²

We will find the acceleration of the cart,

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Time taken, t = 4.8 s

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Now the force which causes this acceleration is:

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2 years ago