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sladkih [1.3K]
4 years ago
10

I NEED someone to explain how to do this. If you just give me a stupid answer, I will report you. I don't just want the answer,

I want to know how to do it so I can learn. Thank you for understanding.
Sara's mom takes the parkway to work. It takes her 30 minutes to travel from mile marker 88 where she enters to her exit at mile marker 121. What is her average speed?
Physics
1 answer:
Alexus [3.1K]4 years ago
6 0
She is going 66 miles per hour.

As you know, speed is usually measured in miles per hour. The distance between the 88 mile marker and the 121 mile marker is 33 miles. That means Sara’s mom travelled 33 miles in 30 mins. You want to figure out how many miles she travelled in 60 minutes.

If she travelled 33 miles in 30 minutes, and 60 minutes is double 30 minutes, then Sara’s mom was traveling 66 miles per hour.
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katrin2010 [14]

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b.) the diverge in incident beam of light

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A convex lens is thicker at the center than at the edges. It makes light to converge at a point.

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8 0
3 years ago
How do you balance this equation Mg+ O2= MgO
Anuta_ua [19.1K]

Answer:

2 Mg(s) + O2(g) → 2 MgO(s)

As magnesium (Mg) has a valency of +2, and oxygen (O) has a valency of -2, the ratio would be 1:1, and magnesium oxide would be represented as MgO. It is insoluble in water, hence it has the subscript as a solid, represented by (s). In order to use up the diatomic oxygen (O2), there needs to be two moles of magnesium (2Mg) on the reactant side. This would produce 2 moles of MgO on the product side.

Explanation:

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A 1,000 kg car travels at 15 m/s.<br> What is its momentum?
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15,000 kg.m/s

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