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3 years ago

Which of the following statements CANNOT be supported by Kepler's laws of planetary motion?

Physics

2 answers:

horsena [70]3 years ago

8 0

Answer:

B) A planet's speed as it moves around the sun will not be the same in six months.

Explanation:

A planet's speed as it moves around the sun will not be the same in six months, is a statement that CANNOT be supported by Kepler's laws of planetary motion.

Alisiya [41]3 years ago

6 0

The statement ‘A planet's speed as it moves around the sun will not be the same in six months’ cannot be supported by Kepler’s law of planetary motion.

Answer: Option B

<u>Explanation: </u>

Johannes Kepler stated three significant laws related to planetary motion. The option A statement is true. Because, the first law defines that the distance between the planet and the sun will not be same as they are rotating around the sun in elliptical orbits.

The third law states that the ratio of square of time taken to complete one orbital rotation by two planets will be equal to the ratio of cube of the distances of the two planets from the sun.

So, according to third law, the statements (c) and (d) can also be supported by Kepler's law. Hence, option (b) is not supported by Kepler's law.

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A convex security mirror has a radius of curvature of 12.0 cm. What is the magnification of a pare 3.0 m from the mirror?

Makovka662 [10]

Answer:

magnification will be -0.025

Explanation:

We have given the radius of curvature = 12 cm

And object distance = 3 m

So focal length $f=\frac{R}{2}=\frac{12}{2}=6cm$

Now for mirror we know that $\frac{1}{f}=\frac{1}{u}+\frac{1}{v}$

So $\frac{1}{0.06}=\frac{1}{3}+\frac{1}{v}$

$16.66-0.333=\frac{1}{v}$

v = 0.750 m

Now magnification of the mirror is $m=\frac{-v}{u}=\frac{-0.750}{3}=-0.025$

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3 years ago

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pishuonlain [190]

<span>10 inches
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3 years ago

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If 8.65 g of a tin - fluorine compound contains 5.28 g of tin, what is its empirical formula?

allsm [11]

First, we need to know the amounts of the elements in the compound.

Tin (Sn)= 5.28 g
Fluorine (F) = 8.65 - 5.28 = 3.37 g

Convert these to units of moles by dividing the molar masses.

Tin (Sn)= 5.28 g / 118.71 g/mol = 0.044 mol
Fluorine (F) = 3.37 g / 19.00 g/mol = 0.177 mol

Divide both by the least number of moles of the two.

Tin (Sn)= 0.044 mol / 0.044 mol = 1
Fluorine (F) = 0.177 mol / 0.044 mol = 4

Therefore, the empirical formula would be:
SnF4

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2 years ago

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At a fixed point, P, the electric and magnetic field vectors in an electromagnetic wave oscillate at angular frequency w . At wh

inn [45]

Answer:

Poynting vector oscillate at a frequency of 2omega

Explanation:

This is because The poynting vector is proportional to the cross product of electric and magnetic field vectors. So Because both fields oscillate sinusoidally with frequency w, trigonometric identities show that their product is a sinusoidal function of frequency of 2w.

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3 years ago

Meghan explains to Zach the difference between commensalism, mutualism and parasitism. Which sentence(s) did she include in her

vlabodo [156]

C is the correct answer I’m sure

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