All categories

3 years ago

Which part of earths surface has the greatest rotational speed

1 answer:

6 0

Every point on the surface must have the same rotational speed.
Otherwise some places would rotate away from other places.

If the next block of your city rotated faster than the block that you live on,
then you could sit at home, look out the window, and watch your school
rotate past your house.

The map of the continents on the Earth would change constantly.

You might be interested in

The Apollo Lunar Module was used to make the transition from the spacecraft to the moon's surface and back. Consider a similar m

lions [1.4K]

Answer:

Explanation:

a. Landing height is

H=1.3m

Velocity of lander relative to the earth is, i.e this is the initial velocity of the spacecraft

u=1.3m/s

Velocity of lander at impact, i.e final velocity is needed

v=?

The acceleration due to gravity is 0.4 times that of the one on earth,

Then, g on earth is approximately 9.81m/s²

Then, g on Mars is

g=0.4×9.81=3.924m/s²

Then using equation of motion for a free fall body

v²=u²+2gH

v²=1.3²+2×3.924×1.3

v²=1.69+10.2024

v²=11.8924

v=√11.8924

v=3.45m/s

The impact velocity of the spacecraft is 3.45m/s

b. For a lunar module, the safe velocity landing is 3m/s

v=3m/s.

Given that the initial velocity is 1.2m/s²

We already know acceleration due to gravity on Mars is g=3.924m/s²

The we need to know the maximum height to have a safe velocity of 3m/s

Then using equation of motion

v²=u²+2gH

3²=1.2²+2×3.924H

9=1.44+7.848H

9-1.44=7.848H

7.56=7.848H

H=7.56/7.848

H=0.963m

The the maximum safe landing height to obtain a final landing velocity of 3m/s is 0.963m

8 0

3 years ago

Soap bubble interference Light of 690-nm wavelength interferes constructively when reflected from a soap bubble having refractiv

Nikitich [7]

Answer:

The two possible thicknesses of the soap bubble is 129 nm and 389 nm.

Explanation:

Given that,

Wavelength = 690 nm

Refractive index = 1.33

We need to calculate the two possible thicknesses of the soap bubble

Using formula of thickness

$t=\dfrac{(m+\dfrac{1}{2})\lambda}{2n}$

For m = 0,

Put the value into the formula

$t=\dfrac{\dfrac{690\times10^{-9}}{2}}{2\times1.33}$

$t=129\times10^{-9}\ m$

$t=129\ nm$

For m=1,

Put the value into the formula

$t=\dfrac{\dfrac{3\times690\times10^{-9}}{2}}{2\times1.33}$

$t=389\times10^{-9}\ m$

$t=389\ nm$

Hence, The two possible thicknesses of the soap bubble is 129 nm and 389 nm.

5 0

2 years ago

What are 2 laws of reflection

densk [106]

Answer:

The two laws of reflection are as follows: ... The incidenct ray, the reflected ray, and the normal to the reflecting interface at the point of incidence all lie in the same plane. 2. The angle of incidence equals the angle of reflection.

8 0

2 years ago

Read 2 more answers

A ? watcher is a citizen who is paid by the parties to keep a watchful eye on the voters and the officials.

VARVARA [1.3K]

A poll watcher
<span>a person who is paid by the parties to watch the voters and officials to make sure everything is fair</span>

6 0

3 years ago

Read 2 more answers

Which of the following shows the correct order of the steps in the scientific method?

Luba_88 [7]

B is correct.

Please vote my answer brainliest. thanks!