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viva [34]
3 years ago
15

Circle the statements that indicate a chemical property.

Physics
1 answer:
Lana71 [14]3 years ago
3 0
C) because a new substance is formed
B) not sure but might be because the chemical properties of the substance has changed
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When a falling meteoroid is at a distance above the Earth's surface of 3.40 times the Earth's radius, what is its acceleration d
Alchen [17]

Answer:

g = 0.85 ms^{-2}

Explanation:

g = \frac{GM}{h^{2} }

were; g is the acceleration due to Earth's gravity, G is Newton's gravitation constant (6.674 x 10^{-11} Nm^{2}kg^{-2}), M is the mass of the earth (5.972 x 10^{24} kg), and h is the distance of meteoroid to the earth.

h = 3.40 x R

  = 3.40 x 6371 km

h = 21661.4 km

  = 21661400 m

Thus,

g = \frac{6.674*10^{-11}*5.972*10^{24}  }{(21661400)^{2} }

  = \frac{3.9857 *10^{14} }{4.6922*10^{14} }

  = 0.84944

g = 0.85 ms^{-2}

The acceleration due to the Earth's gravitation is 0.85 ms^{-2}.

6 0
3 years ago
Which of the following statements about radioactive decay is true?
yawa3891 [41]
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"H</span>alf-life" is the term among the following that <span>refers to the time it takes for one-half of the radioactive atoms in a sample of a radioactive element to decay. The correct option is option "d".</span>
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3 years ago
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A light ray is striking the surface of Earth. Which factor would make the light ray more likely to be absorbed than reflected? l
Vladimir [108]

Answer:

B

Explanation:

Trust

5 0
4 years ago
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Two airplanes leave an airport at the same time. The velocity of the first airplane is 660 m/h at a heading of 28.6 ◦ . The velo
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3 years ago
If a marble is released from a height of 10 meters how long would it take to hit the ground?
zlopas [31]
S = ut + 0.5at^2 

<span>10 = 0 + 0.5(9.81)t^2 {and if g = 10 then t^2 = 2 so t ~1.414}  </span>

<span>t^2 ~ 2.04 </span>

<span>t ~ 1.43 seconds</span>
3 0
3 years ago
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