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3 years ago

It is now virtually certain that the dominant cause of recent ice ages is

Physics

1 answer:

Anarel [89]3 years ago

5 0

<span>Variations in Earth-Sun orbital relationships.</span>

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A Molniya orbit is a highly eccentric orbit of a communication satellite so as to provide continuous communications coverage for

likoan [24]

Answer:

Answer: 18.3 km/s

Explanation:

If a satellite in Molniya orbit has an apogee at 48.000 km as measured from the center of Earth, and a velocity of 3.7 km/s. Its velocity in at perigee would be 18.3 km/s.

6 0

3 years ago

Read 2 more answers

As you approach a bicyclist traveling in your lane, adjust your speed and position and do not pass if the road is too _______ fo

tatiyna

Answer:

correct answer is narrow

Explanation:

solution

when we pass someone riding bicycle ahead you then we should decrease our speed and increase the distance between you and bicyclist

and we should ride on road with very predictable manner and we should ride in straight line and if If road is too narrow for a bicycle

then we should ride vehicle to travel side by side so bicyclist should occupy lane until it safe

so here correct option is narrow

5 0

3 years ago

The density of water is 1.00 g/cm3. What is its density in kg/m3?

sweet [91]

Answer:

The metric system was originally devised so that water would have a density of 1 g/cm3, equivalent to 103 kg/m3.

3 0

3 years ago

Read 2 more answers

A satellite moves in a circular earth orbit that has a radius of 7.49 x 106 m. A model airplane is flying on a 24.1-m guideline

mina [271]

Answer:

Explanation:

Given

radius of satellite orbit $r_1=7.49\times 10^6 m$

And orbital velocity is given by

$v=\sqrt{\frac{GM}{r}}$

where M=mass of earth $=5.98 \times 10^{24} kg$

$G=6.67\times 10^{-11}$

$v=\sqrt{\frac{6.67\times 10^{-11}\times 5.98\times 10^{24}}{7.49\times 10^6}$

$v=7.29 \times 10^3 m/s$

centripetal acceleration is given

$a_c=\frac{v^2}{r}$

$a_c=\frac{(7.29\times 10^3)^2}{7.49\times 10^6}$

$a_c=7.095 m/s^2$

For Model airplane

$a_c=\frac{v^2}{r}$

$7.095=\frac{v^2}{24.1}$

$v=\sqrt{170.98}=13.07 m/s$

4 0

4 years ago

A small boat is moving at a velocity of 3.35m/s when it is accelerated by a river current perpendicular to the initial direction

mr_godi [17]

Answer:

v =7.1 m/s

Explanation:

Given that

u = 3.35 m/s

t= 5 s

a= 0.75 m/s²

The final velocity = v

We know v = u +at

v=final velocity

u=initial velocity

Now by putting the values in the above equation

v = 3.35 + 0.75 x 5 m/s

v =7.1 m/s

Therefore the final velocity will be 7.1 m/s

7 0

3 years ago