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antoniya [11.8K]
3 years ago
9

What are the uses of X-rays.​

Physics
1 answer:
Arturiano [62]3 years ago
3 0

Explanation:

id : 237 514 2470

pass : frmCV5

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I am boy :)

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Once a scientist has made a hypothesis, what would they typically do next? (2 points)
ipn [44]

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b-testing

Explanation:

First would be observation/research. Then the hypothesis. After that you would test your theory, conduct experiments. And finally, your conclusion- what you got from the whole process basically.

Hope this helps.

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Best for growing most plants, which soil has good drainage and sufficient moisture?
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The correct answer is "loam".
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yfv.

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2 years ago
In the 19th century James Joule, an English scientist, was the first to recognize the mechanical equivalent of heat as a specifi
Dmitry [639]

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D) wood rubbed against a rough surface feels hot

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3 years ago
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A car travels at a steady 40.0 m/s around a horizontal curve of radius 200 m. What is the minimumcoefficient of static friction
zhenek [66]

Answer:

c. 0.816

Explanation:

Let the mass of car be 'm' and coefficient of static friction be 'μ'.

Given:

Speed of the car (v) = 40.0 m/s

Radius of the curve (R) = 200 m

As the car is making a circular turn, the force acting on it is centripetal force which is given as:

Centripetal force is, F_c=\frac{mv^2}{R}

The frictional force is given as:

Friction = Normal force × Coefficient of static friction

f=\mu N

As there is no vertical motion, therefore, N=mg. So,

f=\mu mg

Now, the centripetal force is provided by the frictional force. Therefore,

Frictional force = Centripetal force

f=F_c\\\\\mu mg=\frac{mv^2}{R}\\\\\mu=\frac{v^2}{Rg}

Plug in the given values and solve for 'μ'. This gives,

\mu = \frac{(40\ m/s)^2}{200\ m\times 9.8\ m/s^2}\\\\\mu=\frac{1600\ m^2/s^2}{1960\ m^2/s^2}\\\\\mu=0.816

Therefore, option (c) is correct.

7 0
3 years ago
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