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Deffense [45]
3 years ago
7

A light-year is _______________

Physics
2 answers:
kozerog [31]3 years ago
3 0
The correct answer would be A "<span>A light-year is the distance light travels in a year.

This is considered a unit of distance connected to the distance that light can travel in one year. It is proved that light travels at 300,000 km per second so, in 1 year, it might travel 10 trillion km. 

</span>
ehidna [41]3 years ago
3 0
The answer is A, the distance light travels in a year.
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What is the effect on the force of gravity between two objects if the mass of one object doubles?
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Then the force will also be doubled
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3 years ago
Which data set has the smallest standard deviation?
hjlf

Answer:

B. 22,22,23,23,22,22,23

Explanation:

The standard deviation is a measure of dispersion or variability of a data set. In order to determine the data set that has the smallest standard deviation, we shall investigate on the ranges of the data sets given. The range of a data set is simply the difference between the maximum and minimum values in a data set. A data set that has a smaller range also has a smaller standard deviation.

From the alternatives given, the data set given by alternative B has the smallest range and consequently the smallest standard deviation.

The maximum value is 23 while the minimum is 22. The range is 1.

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3 years ago
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4 0
3 years ago
The spectrum of light emitted by helium atoms is different than that emitted by hydrogen atoms because
MaRussiya [10]
<h3><u>Answer;</u></h3>

The different atoms have different quantized energy levels

<h3><u>Explanation;</u></h3>
  • The atoms of different elements have different energy levels because they have different nuclear charges and spins, and different numbers of electrons.
  • Each different kind of atom, like hydrogen or radon, has a distinct nuclear charge and number of electrons. This makes the potential energy function different for each atom, and therefore results in different energy levels.
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4 0
3 years ago
The gravitational potential energy of an object is equal to its weight multiplied by its
Elina [12.6K]

Answer:

Height above a surface

Explanation:

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It is also the amount of work a force has to do in order to bring an object from a particular position to a point of reference.

It is given mathematically as:

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h = height above a surface

m*g represents the weight of the object.

Hence, Gravitational potential energy is the product of an object's weight and its height above a surface/reference point.

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