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3 years ago

What modifications did Kepler make to Copernicus’s model? Select two options.

Physics

1 answer:

victus00 [196]3 years ago

8 0

The complete question is

What modifications did kepler make to copernicus’s model? check all that apply. planetary orbits are elliptical. planets closer to the sun move faster. planets spin in an epicycle while orbiting earth. venus has phases due to its orbiting of the sun. earth’s rotation causes the rising and setting of the sun.

Answer:

Planetary orbits are elliptical.

Planets closer to the Sun move faster.

Explanation:

The first option is based on the first law that states that the planets orbit the sun in ellipses, with the sun at one focus of the ellipse.

The second option is based on the third law that states that the square of the time of revolution about the sun is directly proportional to the cube of the mean radius of orbit of the planet.

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A car traveling at 27.4 m/s hits a bridge abutment. A passenger in the car, who has a mass of 65.0 kg, moves forward a distance

Minchanka [31]

Answer:

$F=43570.9N$

Explanation:

We can calculate the acceleration experimented by the passenger using the formula $v_f^2=v_i^2+2ad$ , taking the initial direction of movement as the positive direction and considering it comes to a rest:

$a=\frac{v_f^2-v_i^2}{2d}=\frac{-v_i^2}{2d}$

Then we use Newton's 2nd Law to calculate the force the passenger of mass m experimented to have this acceleration:

$F=ma=\frac{-mv_i^2}{2d}$

Which for our values is:

$F=\frac{-(65kg)(27.4m/s)^2}{2(0.56m)}=43570.9N$

6 0

3 years ago

Select the correct answer.

MariettaO [177]

Answer:

can't explain but is correct

7 0

3 years ago

How do I find the specific heat?

nevsk [136]

Answer:

Hope it may help you have a great day at school bye bye. Plz put it in brainliest answer my only request plz plz plz plz plz

4 0

3 years ago

A current carrying circular loop of wire lies flat on a table top. When viewed from above, the current moves around the loop in

Yanka [14]

Answer:

Option (b)

Explanation:

Maxwell right hand thumb rule: if we hold a current carrying conductor in our right hand such taht the thumb indicates the direction of current then the curling of fingers give the direction of magnetic field around the conductor and vice versa.

Here the current is counterclockwise so by use of Maxwell right hand thumb rule the direction of magnetic field is straight up.

7 0

3 years ago

Calculate the focal length of a lens needed by a woman whose near point is 50cm from her eyes, assuming the least distance of di

son4ous [18]

The focal length of a lens needed by a woman whose near point is 50cm from her eyes is 50cm.

To find the answer, we have to know about the focal length of correcting lens.

<h3>How to find the focal length of correcting lens?</h3>

If x is the distance of nearest point of the defective eye and D is the least distance of distinct vision, then, the expression for focal length of the correcting lens will be,

$f=\frac{XD}{X-D}$

It is given that, the woman whose near point is 50cm from her eyes, assuming the least distance of distinct vision for a normal eye is 25cm. Thus, the focal length will be,

$f=\frac{50*25}{50-25} =50cm.$

Thus, we can conclude that, the focal length of a lens needed by a woman whose near point is 50cm from her eyes is 50cm.

Learn more about the focal length here:

brainly.com/question/27915592

#SPJ9

4 0

2 years ago