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4 years ago

A mineral's chemical composition and crystal structure help determine it's ___________.

Physics

1 answer:

AnnyKZ [126]4 years ago

4 0

Hiya!

The answer to your question is B.

Physical Properties.

~Hope this helps~

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a student standing between two walls shouts once.he hears the first echo after 3 seconds and the next after 5 seconds. calculate

Karolina [17]

Explanation:

It took $t_1 =1.5\:\text{s}$ for the sound to reach the 1st wall and at the same time time, the same sound took $t_2 = 2.5\:\text{s}$ to reach the 2nd wall. Assuming that the sound travels at 343 m/s, then let $x_1$ be the distance of the person to the 1st wall and $x_2$ be the distance to the 2nd wall. So the distance between the walls X is

$X = x_1 + x_2 = v_st_1 + v_st_2 = v_s(t_1 + t_2)$

$\:\:\:\:\:= (343\:\text{m/s})(4.0\:\text{s}) = 1372\:\text{m}$

6 0

3 years ago

The armature windings of a dc motor have a resistance of 5.0 Ω. The motor is connected to a 120-V line, and when the motor reach

Snezhnost [94]

Answer:

The current in the motor in this case is 13.2 A

Explanation:

Given:

Resistance $R =$ 5 Ω

Emf $E = 120$ V

Induced emf $E _{induced} = 108$ V

When motor run at half speed due to load increased then induced emf is also reduced to half of its value

So new induced emf in our case is given by,

$E_{induced } = \frac{108}{2} = 54$ V

$I = \frac{V}{R}$

Where $V =$ $E - E_{Induced }$

$I = \frac{120-54}{5}$

$I = 13.2$ A

Therefore, the current in the motor in this case is 13.2 A

3 0

3 years ago

What does it mean if the slope is zero?

kiruha [24]

The object is not moving.

My explanation is that say if you sit a ball on the table and it is a smooth surface with no bumps or anything. The ball will sit still since it can’t roll unless you hit it.

Hope this helps!

5 0

3 years ago

Describe one new piece of information that you learned about one of the featured scientist

statuscvo [17]

Answer:

Development in science:

There a number of individuals in the world around us who has improved the field of science and made it easy for us to know this universe more easily then ever. This universe is still unexplored and there are going to be more then billions of stars which are still not studied and has an immense amount of information regarding the universe.

Stephen Hawking: The scientist who made it easy for each of us to know the universe and more over the cosmos in a more detailed form, as before this no one knew about the different patterns of entities and there properties.

A genius who was handicapped:

He was a genius in cosmology, mathematics, and other subjects of science as he was diagnosed by the amyotrophic lateral sclerosis(ALS), which made it unable for him to live a normal life.But, he communicated through a computer which detected his nerve signals and shared his thoughts about any thing or subject.

Why him?

Stephen hawking was just tremendous in making it more understandable about the black holes, time worms, and space etc.As it was known to very small number of people before he took the stage.

8 0

3 years ago

Frost wedging in a sentence

Brrunno [24]

example "How would i put frost wedging in a sentence?" LOL hope this helped

7 0

4 years ago