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3 years ago

15

Why do we use the two-body problem to solve interplanetary trajectories, instead of including all of the appropriate gravitation

al forces that actually apply?

1 answer:

egoroff_w [7]3 years ago

6 0

Answer:

ur mom

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You might be interested in

A)If the rms value of the electric field in an electromagnetic wave is doubled, by what factor does the rms value of the magneti

Ghella [55]

A) The magnetic field doubles as well

The relationship between rms value of the electric field and rms value of the magnetic field for an electromagnetic wave is the following:

$E_{rms}=cB_{rms}$

where

E_rms is the magnitude of the electric field

c is the speed of light

B_rms is the magnitude of the magnetic field

From the equation, we see that the electric field and the magnetic field are directly proportional: therefore, if the rms value of the electric field is doubled, then the rms value of the magnetic field will double as well.

B) The intensity will quadruple

The intensity of an electromagnetic wave is given by

$I=\frac{1}{2}c\epsilon_0 E_0^2$

where

c is the speed of light

$\epsilon_0$ is the vacuum permittivity

$E_0$ is the peak intensity of the electric field

The rms value of the electric field is related to the peak value by

$E_{rms}=\frac{E_0}{\sqrt{2}}$

So we can rewrite the equation for the intensity as

$I=c\epsilon_0 E_{rms}^2$

we see that the intensity is proportional to the square of the rms value of the electric field: therefore, if the rms value of the electric field is doubled, the average intensity of the wave will quadruple.

7 0

3 years ago

A quantity that does not have direction is referred to as a

Hatshy [7]

B

A quantity which does not depend on direction is called a scalar quantity. Vector quantities have two characteristics, a magnitude and a direction. Scalar quantities have only a magnitude. ... The resulting motion of the aircraft in terms of displacement, velocity, and acceleration are also vector quantities.

5 0

3 years ago

Move the chemistry book across the physics book again. study the thermometer to determine whether there’s a change in the physic

jekas [21]

Heat is always transferred through the movement of matter in the convection mode of heat transmission.

<h3>What is heat transfer ?</h3>

Heat transfer is the movement of heat from one solid or liquid item to another. Always, heat moves from one body with a greater temperature to one with a lower temperature. To put it another way, heat always transfers from a hotter body to a cooler body.

Heat energy is transferred through the mechanism of conduction when nearby atoms or molecules collide. In solids and liquids, where particles are more closely spaced, conduction happens more easily than in gases, where particles are more widely spaced.

Here we can say that heat is transfer when there is movement between two books and hence there is change in temperature.

Learn more about Heat transfer here:

brainly.com/question/12072129

#SPJ4

6 0

2 years ago

21.-Una esquiadora olímpica que baja a 25m/s por una pendiente a 20o encuentra una región de nieve húmeda de coeficiente de fric

jeyben [28]

Answer:

y = 12.82 m

Explanation:

We can solve this exercise using the energy work theorem

W = ΔEm

friction force work is

W = fr . s = fr s cos θ

the friction force opposes the movement, therefore the angle is 180º

W = - fr s

we write Newton's second law, where we use a reference frame with one axis parallel to the plane and the other perpendicular

N -Wy = 0

N = mg cos θ

the friction force remains

fr = μ N

fr = μ mg cos θ

work gives

W = - μ mg s cos θ

initial energy

Em₀ = ½ m v²

the final energy is zero, because it stops

we substitute

- μ m g s cos θ = 0 - ½ m v²

s = ½ v² / (μ g cos θ)

let's calculate

s = ½ 20² / (0.55 9.8 cos 20)

s = 39.49 m

this is the distance it travels along the plane, to find the vertical distance let's use trigonometry

sin 20 = y / s

y = s sin 20

y = 37.49 sin 20

y = 12.82 m

8 0

4 years ago

Divers in Acapulco dive from a cliff that is 65 m high. If the rocks

Alex777 [14]

Answer:

Cool question! First step is to find the time taken to fall

57

m

, then to find the horizontal velocity needed to cover

24

m

in that time. In this case the answer is

7.0

m

s

−

1

.

Explanation:

This is a less typical projectile motion question, but it's still projectile motion. This means the horizontal and vertical directions can be considered separately. We assume that the initial vertical velocity,

u

y

=

0

m

s

−

1

, and we are trying to find the required initial horizontal velocity,

u

x

.

To find the time taken to fall

57

m

:

s

=

u

t

+

1

2

a

t

2

Since

u

=

0

, we can rearrange this to:

t

=

√

2

s

a

=

√

2

⋅

57

9.8

=

3.41

s

The horizontal velocity will be constant (ignoring air resistance), so to cover

24

m

in

3.41

s

will be given by:

v

=

s

t

→

u

x

=

24

3.41

=

7.0

m

s

−

1

Answer link

5 0

2 years ago