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zhannawk [14.2K]
4 years ago
10

The orbits of planets being elliptical was one the planetary laws developed by

Physics
2 answers:
11Alexandr11 [23.1K]4 years ago
7 0

The correct answer is Kepler



Ede4ka [16]4 years ago
3 0
The orbits of planets being elliptical was one of the planetary laws developed by Johannes Kepler.
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Explain Resistor in parallel and series. ​
patriot [66]

\sf\huge\underline\blue{Resistor:-}

\rightarrow<u>A resistor is a passive two-terminal electrical component that implements electrical resistance as a circuit element</u>.

\rightarrowResistors reduce the current flow and lower voltage levels within circuits.

\sf\large\underline\purple{Resistors \:in\: Series:-}

\rightarrowA <u>circuit is said to be connected in series</u> when the same amount of <u>current flows through the resistors</u>. In such circuits, the voltage across each resistor is different.

\rightarrowIn a series connection, if any resistor is broken or a fault occurs, then the entire circuit is turned off. The construction of a series circuit is simpler compared to a parallel circuit.

\rightarrowFor the above circuit(attached image-1), the total resistance is given as:

\sf{R_{total}\: = \:R1 + R2 + ….. + Rn}

The total resistance of the system is just the total of individual resistances.

\sf\large\underline\purple{Resistors \:in\: Parallel:-}

\rightarrowA <u>circuit is said to be connected in parallel</u> when the <u>voltage is the same across the resistors</u>. In such circuits, the current is branched out and recombines when branches meet at a common point.

\rightarrowA resistor or any other component can be connected or disconnected easily without affecting other elements in a parallel circuit.

\rightarrowThe figure(attached image -2) above shows ‘n’ number of resistors connected in parallel. The following relation gives the total resistance here

\sf{\frac{1}{R_{total}}\: = \:\frac{1}{R1} + \frac{1}{R2} + ….. + \frac{1}{Rn}}

\rightarrowThe sum of reciprocals of resistance of an individual resistor is the total reciprocal resistance of the system.

_______________________________

Hope it helps you:)

6 0
3 years ago
Read 2 more answers
Please help with this question
Gennadij [26K]

Answer:

I believe the answer is 5718.75. Respond if it is wrong please.

Explanation:

I used a calculator.

3 0
3 years ago
What is the gravitational force between two masses of 15kg each, when their centers are 0.25m? Could you detect this force with
Lunna [17]
Well I don't know !
Let's work it out.

The gravitational force between two objects is

                     F  =  G  ·  M₁·M₂ / R²     .

'G'    is the 'universal gravitational constant'.  We could look it up. 
'M₁'  is the mass of one object
'M₂'  is the mass of the other object 
'R'    is the distance between their centers. 

It looks complicated, but stay with me.  We can do this !
We know all the numbers, so we can calculate the force.

'G'    is  6.67 x 10⁻¹¹ newton·meter² / kg²   (I looked it up.  You're welcome.)
'M₁'  is  15 kg
'M₂'  is  15 kg 
'R'    is  0.25 meter.

Now it's time to pluggum in.

       F  =  G  ·  M₁·M₂ / R²

           = (6.67 x 10⁻¹¹  newton·meter² / kg²) · (15 kg) · (15 kg)  /  (0.25 m²)

           = (6.67 x 10⁻¹¹  ·  15  ·  15 / 0.0625)  N·m²·kg·kg / kg²·m²

           =      2.4 x 10⁻⁷  Newton  .

That a force equivalent to about  0.00000086  of an ounce.
This is the answer to part-a.

Concerning the answer to part-b ...
Personally, I could not detect this force, no matter what kind of equipment
I had. But I am just a poor schlepper engineer, educated in the last Century,
living out my days on Brainly and getting my kicks from YouTube videos. 
I am not pushing the box to the envelope, or thinking outside the cutting
edge ... whatever.
I am sure there are people ... I can't name them, because they keep a
low profile, they stay under the radar, they don't attract a lot of media
attention, their work is not as newsworthy as the Kardashians, and plus,
they seldom call me or write to me ... but I know in my bones that there
are people who have measured the speed of light to NINE significant figures,
aimed a spacecraft accurately enough to take close-up pix of Pluto ten years
later, and detected gravity waves from massive blobs that merged 13 billion
years ago, and I tell you that YES !  THESE guys could detect and measure
a force of  0.86 micro-ounce if they felt like it !
4 0
3 years ago
A projectile is launched horizontally from a raised platform. If air resistance is ignored, then as the projectile falls to the
aliya0001 [1]

<h2>The option ( b ) is appropriate answer </h2>

Explanation:

When a projectile is projected from height horizontally . The only force acting upon it is the downwards gravitational force of attraction due to earth .

Due to this force its vertical component of velocity , which is in the downward direction will be increased .

As there is no force horizontally , the horizontal  velocity of throw will remain constant .

Thus ( b ) option is the correct option .

6 0
3 years ago
Five equal negative charges are uniformly spaced in a semicircular
balu736 [363]

Answer:

The direction is that of a 3rd quadrant angle

Explanation:

when you have 2 45 angles it equals to 90 then with the 90 we multiply by 2 due to the 2 adjacent angles equating to 180 which swings it to the 3rd quadrant angle

6 0
4 years ago
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