2 years ago

Comon help me out here

Physics

1 answer:

Lelechka [254]2 years ago

5 0

Answer:

Explanation:

Because the other 2 you didn't answer are not usually correct but in some cases yes they are but It is B because It has a lot of minerals in it and could be used to make a lot of things with it.

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sergeinik [125]

We know, Speed = Wavelength * Frequency
Speed = 32.4 * 3
Speed = 97.2 m/s

So, option D is your correct answer.

Hope it helped.

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2 years ago

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Consider a roller coaster begins 15m above the ground. If the cart has a mass of 75kg, what is the velocity of the cart halfway

SashulF [63]

Answer:

v = 12.12 m/s

Explanation:

Given that,

The mass of the cart, m = 75 kg

The roller coaster begins 15 m above the ground.

We need to find the velocity of the cart halfway to the ground. Let the velocity be v. Using the conservation of energy at this position, h = 15/2 = 7.5 m

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So, the velocity of the cart is 12.12 m/s.

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2 years ago

You have a small piece of iron at 75 °C and place it into a large container of water at 25 °C. Which of these best explains what

svp [43]

D. Heat energy will be transferred within the system and if left long enough, there will be enough transferred energy to make both of them the same temperature.

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2 years ago

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. During a collision with a wall, the velocity of a 0.200-kg ball changes from 20.0 m/s toward the wall to 12.0 m/s away from th

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Answer:

106.7 N

Explanation:

We can solve the problem by using the impulse theorem, which states that the product between the average force applied and the duration of the collision is equal to the change in momentum of the object:

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