3 years ago

HOW MANY KILOMETERS IS EARTH FROM THE SUN?

Physics

2 answers:

maria [59]3 years ago

7 0

Earth is 150 million kilometers away for the sun

dlinn [17]3 years ago

3 0

The Sun, the star of our Galaxy, the reason of our life, is at about 150 million kilometers from us: The Earth!
But in January, it gets a little more closer to 146 Million kilometers (that's the closest possible), and the furthest is 152 million kilometers in July.

Hope this Helps! :)

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Harman [31]

Answer: 1.9 m/s

Explanation:

1) Data:

height, y = 0

range, x = 0.77m

angle, α = 45°

question, horizontal velocity, Vox = ?

2) Physical principles and formulas

Projectile motion.

$y=V_{0y}t-gt^{2} /2\\ \\ x=V_{0x}t\\ \\ V_{0y}=V_0sin\alpha \\ \\ V_{0x}=V_0cos\alpha$

3) Solution

$0.77=V_0cos(45)t\\ t=0.77/(V_0cos(45))$

$y=0=V_0sin(45)t-gt^{2} /2$

Factor

$0=t[V_0sin(45)-gt/2]$

Discard t = 0 and solve for the other factor:

$gt/2=V_0sin(45)\\ \\ V_0= gt/(2sin(45))=9.81[0.77/V_{0}cos(45)]/[2sin(45)]\\ \\ V_0^2=9.81[0.77/(2cos(45)sin(45)=9.81[0.77/sin(90)]=7.55\\ \\ V_0}=\sqrt{7.55} =2.8$