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3 years ago

How and why planets orbit the sun and how and why a planets speed changes orbit

Physics

2 answers:

anygoal [31]3 years ago

7 0

the gravitonal pull

Explanation:

Brut [27]3 years ago

5 0

The details are very long and complicated. The simplest way I can answer those 4 questions is: That's the way gravity works.

If you take Newton's law of gravity and his three laws of motion, and massage them properly using some geometry and some calculus, you can show that planets MUST move like Kepler's laws say they do, and like what we see them actually doing in the sky.

(I used to be able to do this, but it's been a while.)

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High blood pressure can lead to all of the following except: Question 3 options: A) stroke B) vision loss C) aerobic fitness D)

Fantom [35]

Answer:

C) Aerobic Fitness

Explanation:

High blood pressure doesn't affect your aerobic fitness.

6 0

3 years ago

Read 2 more answers

What is the energy dissipated as a function of time in a circular loop of N turns of wire having a radius of r0 and a resistance

Snezhnost [94]

Explanation:

Let N be the number of turns in a circular loop having a radius of r₀ and a resistance R. The magnetic field is given by :

$B(t)=B_oe^{-\dfrac{t}{\tau}}$

The induced emf in the circular coil is given by :

$\epsilon=\dfrac{-d\phi}{dt}$

Where

$\phi=BA$

$\epsilon=N\dfrac{-d(BA)}{dt}$

$\epsilon=NAB_o\dfrac{-d(e^{-\dfrac{t}{\tau}})}{dt}$

$\epsilon=\dfrac{NAB_o}{\tau}e^{-t/\tau}$

Power dissipated is given by :

$P=\dfrac{\epsilon^2}{R}$

$P=\dfrac{(\dfrac{NAB_o}{\tau}e^{-t/\tau})^2}{R}$

$P=(\dfrac{NAB_o}{\tau})^2\dfrac{e^{-2t/\tau}}{R}$

Energy dissipated in the circuit is given by :

$E=\int\limits^T_0 {P.dt}$

$E=\int\limits^T_0 {(\dfrac{NAB_o}{\tau})^2\dfrac{e^{-2t/\tau}}{R}.dt}$

$E=\dfrac{1}{R}(\dfrac{NAB_o}{\tau})^2\int\limits^T_0 {e^{-2t/\tau}.dt}$

$E=\dfrac{(N\pi r_o^2B_o^2)^2}{2R}{\tau(e^{2t/\tau}-1)}{}$

Hence, this is the required solution.

7 0

3 years ago

What characteristic is responsible for our brain being able to distinguish different colors?

likoan [24]

I think it is the first one

5 0

3 years ago

Read 2 more answers

Find the work done in pumping gasoline that weighs 6600 newtons per cubic meter. A cylindrical gasoline tank 3 meters in diamete

almond37 [142]

Answer:

work done in pumping the entire fuel is 1399761 J

Explanation:

weight per volume of the gasoline = 6600 N/m^3

diameter of the tank = 3 m

length of the tank = 6 m

The height of the tractor tank above the top of the tank = 5 m

The total volume of the fuel is gotten below

we know that the tank is cylindrical.

we assume that the fuel completely fills the tank.

therefore, the volume of a cylinder =

where r = radius = diameter ÷ 2 = 3/2 = 1.5 m

volume of the cylinder = 3.142 x x 6 = 42.417 m^3

we then proceed to find the total weight of the fuel in Newton

total weight = (weight per volume) x volume

total weight = 6600 x 42.417 = 279952.2 N

therefore,

the work done to pump the fuel through to the 5 m height = (total weight of the fuel) x (height through which the fuel is pumped)

work done in pumping = 279952.2 x 5 = 1399761 J

5 0

3 years ago

Which of the following parts of a nuclear power plant is turned by steam? Select one: a. control rods b. reactor vessel c. turbi

SOVA2 [1]

A nuclear power plant is defined as a thermal power station where electricity is generated by the help of sustainable nuclear fission.

A nuclear power plant needs nuclear reactor as the thermal energy generator .The reactor has various parts where fissionable radioactive material will undergo nuclear fission .Through this process high amount of thermal energy is released which is allowed to water to generate steam.

The steam produced in the reactor drives the turbine which is connected to the generator.Due to the electromagnetic induction the generator will produce electricity.

The control rods present in the nuclear reactor will control the rate of fission by absorbing the thermal neutrons.

Hence the correct answer of the question is C i.e Turbine.

8 0

3 years ago

Read 2 more answers