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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

Explanation:

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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3 years ago

500 kg car takes a car of radius 50m with a velocity of 36km/hr.the centripetal force is

mylen [45]

$\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}$

Given - a car weighing 500 kg takes a turn of radius 50m with a velocity of 36 km/hr

To calculate - the centripetal force

Formula used -

$\bold{F = \frac{mv {}^{2} }{r}} \\$

where ,

r = radius

m = mass of the object

v = velocity with which the object moves

According to Question ,

Mass of car = 500 kg

Radius of the round = 50 m

velocity of car = 36 km/hr

$velocity = \cancel{36 }\times \frac{5}{\cancel{18}} \\ \\ \implies \: velocity = 10 \: ms {}^{ - 1}$

Substituting the values in the formula ,

$F = \frac{\cancel{500} \times 10 {}^{2} }{\cancel{50}} \\ \\ \dashrightarrow \: F = 10 \times 10 {}^{2} \\ \\ \dashrightarrow \: F = 1000 \: N$

hope helpful ~

3 0

2 years ago

How does charging by conduction occur?

Rufina [12.5K]

Charging by conduction involves the contact of a charged object to a neutral object. Suppose that a positively charged aluminum plate is touched to a neutral metal sphere. The neutral metal sphere becomes charged as the result of being contacted by the charged aluminum plate. Or suppose that a negatively charged metal sphere is touched to the top plate of a neutral needle electroscope. The neutral electroscope becomes charged as the result of being contacted by the metal sphere. And finally, suppose that an uncharged physics student stands on an insulating platform and touches a negatively charged Van de Graaff generator. The neutral physics student becomes charged as the result of contact with the Van de Graaff generator. Each of these examples involves contact between a charged object and a neutral object. In contrast to induction, where the charged object is brought near but never contacted to the object being charged, conduction charging involves making the physical connection of the charged object to the neutral object. Because charging by conduction involves contact, it is often called charging by contact.

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4 years ago

4. Next discuss how Dr. Knappe used technology to measure how fast the tectonic plates are

wariber [46]

Answer:

She used the Global Positioning System.

Explanation:

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