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3 years ago

A quelle distance le soletl se trouve-t-il de la terre?

Physics

1 answer:

Mnenie [13.5K]3 years ago

5 0

The explanation for the following answer is explained below.

Explanation:

The sun is at an average distance of about 93,000,000 miles(150 million kilometers) away from the earth.It is so far away that light from the Sun,travelling at a speed of 186,000 miles (300,000 kilometers) per second, takes about 8 minutes to reach the earth.Earth does not travel around the Sun in a perfect circle.Instead its orbit is elliptical,like a stretched circle,with the sun just off the center of the orbit. At its closest,the Sun is 91.4 million miles (147.1 million kilometers ) away us.At its farthest ,the Sun is 94.5 million miles (152.1 million km) away.The Earth is closest to the Sun during winter in the northern hemisphere

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John drives a distance of 90 Km to the right at a steady speed of V1=25.00 m/s. Then he stops at the gas station for 10 minutes.

aleksley [76]

a. Speed is defined as rate of change of distance per unit time whereas velocity is defined as rate of change of displacement per unit time.

b. $t=6000\ s$ is the total time taken in the trip

c. $d=126000\ m$ is the total distance

d. $s=54000\ m$ towards right from the starting point.

e. $v_a=21\ m.s^{-1}$

f. $\vec v_a=9\ m.s^{-1}$ towards right.

Explanation:

Speed is a scalar quantity while velocity is a vector quantity.

Speed is defined as rate of change of distance per unit time whereas velocity is defined as rate of change of displacement per unit time.

Speed is a directionless quantity while velocity constitutes direction.

<em>Total time of round trip when we're given:</em>

distance travelled to the right, $d_r=90000\ m$

speed while travelling to the right, $v_r=25\ m.s^{-1}$

time spent at gas station, $t_g=600\ s$

time spent while travelling back towards the left, $t_l=30\times 60=1800\ s$

speed while travelling to the left, $v_{_l}=20\ m.s^{-1}$

<em>Now time taken for travelling towards right:</em>

$t_r=\frac{d_r}{v_r}$

$t_r=\frac{90000}{25}$

$t_r=3600\ s$

<u>Therefore total time taken in the round trip:</u>

$t=t_r+t_l+t_g$

$t=3600+600+1800$

$t=6000\ s$

<em>Now, distance travelled towards left:</em>

$d_l=v_{_l}\times t_l$

$d_l=20\times1800$

$d_l=36000\ m$

<u>Therefore total distance:</u>

$d=d_l+d_r$

$d=36000+90000$

$d=126000\ m$

Now, total displacement:

$s=d_r-d_l$

$s=90000-36000$

$s=54000\ m$ towards right from the starting point.

<u>Average speed:</u>

$v_a=\frac{d}{t}$

$v_a=\frac{126000}{6000}$

$v_a=21\ m.s^{-1}$

<u>Average velocity:</u>

$\vec v_a=\frac{s}{t}$

$\vec v_a=\frac{54000}{6000}$

$\vec v_a=9\ m.s^{-1}$ towards right.

4 0

3 years ago

What is the momentum of a 5.6 kg ball going 22m/s ?

maks197457 [2]

<h2>momentum(p) = mass(m)×acceleration (a)</h2>

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3 years ago

Plz Help

Angelina_Jolie [31]

Answer: There is greater genetic variety in offspring.

Explanation: This is because with asexual reproduction it is faster, but the offspring is identical to the parent. While sexual reproduction is slower yes, but there is a variety in genetics.

Hope this helps!

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3 years ago

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Where is there potential energy in this system?

mario62 [17]

In the air and the metal

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Captain Hook is ghting Peter Pan, and they are about to step onto a tightrope strung horizontally between two maststhat are 16 m

andreyandreev [35.5K]

Complete Question

Captain Hook is fighting Peter Pan, and they are about to step onto a tightrope strung horizontally between two masts that are 16 m apart. When Pan and Hook are standing exactly halfway between the masts, the rope makes a 3 anglewith the horizontal. The rope has a diameter of 0.02 m and a Youngs modulus of 35 GPa.

What is the combined mass,in kilograms, of Peter Pan and Captain Hook?

Answer:

Their combined mass is $m= 161.2kg$