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3 years ago

based on this scatter plot,whatcan you say about the relationship between study time and test scores?

Physics

1 answer:

siniylev [52]3 years ago

8 0

Based on this scatter plot, I can say that in general, test scores vary directly with study time. In other words, in a population large enough to reveal the direct relationship, the more time a student spends studying, the higher that student's test scores will be.

I didn't need a scatter plot to reveal that to me. That's practically in the category of Law given to Moses at Sinai.

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A 20 kg box rests on the ground. Round all answers to the hundredths, if necessary. What is the weight of the box?

cricket20 [7]

Mass=m=20kg
Acceleration due to gravity=10m/s^2

Weight=Applied force

$\\ \sf\longmapsto F=mg$

$\\ \sf\longmapsto F=20(10)$

$\\ \sf\longmapsto F=200N$

5 0

3 years ago

Read 2 more answers

The weight of a person is 500N and his foot imprint area is 0.5m^2.Calculate the total pressure exerted by person when he stands

Ghella [55]

Answer:

Pressure on both feet will be $500N/m^2$

Explanation:

Weight of the person F = 500 N

Area of foot print $A=0.5m^2$

Area of both the foot $A=2\times 0.5=1m^2$

We have to find pressure on both the feet

Pressure is equal to ratio of force and area

So pressure $P=\frac{F}{A}$

$P=\frac{500}{1}=500N/m^2$

So the pressure on both feet will be $500N/m^2$ when person stands on both feet.

7 0

3 years ago

a uniform rule balance on a knife edge at the 55cm mark when a mass of 40g is hung from the 95cm mark. find the weight of the ru

BigorU [14]

Answer:

W = 3.1 N

Explanation:

moments about any convenient point will sum to zero.

I choose summing about the knife edge mark and will assume the ruler of weight W is of uniform construction.

I will assume the ruler weight makes a positive moment

W[55 - 50) - 0.040(9.8)[ 95 - 55] = 0

5W = 15.68

W = 3.136

7 0

3 years ago

In two or more complete sentences, explain how you can prove that the number of degrees that the Moon rotates around the Earth e

ioda

In sidereal month, Moon takes about 13 degrees rotation in one day. To get the precise value, you need to know that Moon takes about 27.32 days to complete its one rotation. And in one rotation there are about 360°. Divide 360 by 27.32. You would get 13.18° per day. Therefore, every five days it would be 13.18° * 5 = 65.9°.

However, in synodic month, it takes about 29.53 days. So for one day, its rotation would be 12.19°. For every five days, it would rotate about 12.19° * 5 = 60.95° or 61°. (I think you are talking about the synodic month)

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3 years ago

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Why are mineral bands in metamorphic rocks light and dark colored?

Lera25 [3.4K]

Answer:Dark minerals rich in iron and magnesium separate from light minerals rich in silica and aluminum.

Explanation: Metamorphic rocks are rocks formed as a result of the transformation of other existing rocks which can be Igneous or Sedimentary rocks,this transformation process is called METAMORPHISM. During metamorphism,rocks under Serious levels of stress which can lead to the separation of materials.

During this separation process,Dark minerals rich in iron and magnesium are separated from light minerals rich in silica and aluminum.

4 0

3 years ago