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3 years ago

5

The Sun is essential to life on earth. Which of the statements is not true about the Sun's importance to life on the earth?

2 answers:

serg [7]3 years ago

8 0

Answer: The correct answer is Option B.

Explanation:

Sun is star present in Our Solar System around which Earth revolves. Earth is the third planet in Our Solar system and is the only planet on which life exists.

The existence of life on Earth is because of the Sun. It plays a very important role. Sun helps the earth to keep moving in a fixed orbit because of the gravitational attraction towards the Sun. It also supports the processes of water cycle on Earth by evaporating the water.

The climate and temperature conditions on Earth is due to the Sun only.

Plate tectonics is the theory which states that the Earth's outer shell is divided into several plates which glide over the mantle. There is no role of Sun to play in the process of plate tectonics.

Hence, the correct answer is Option B.

MakcuM [25]3 years ago

3 0

I think that the answer is B that the sun (DOES NOT) support the processes of plate tectonics

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Answer:

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Explanation:

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3 years ago

A cheetah runs 5 miles in 60 seconds. How fast did the cheetah run in MILES per HOUR? Convert seconds into hours first, then sol

Vinil7 [7]

Answer:

300 miles per hour

Explanation:

Speed is distance per unit time, expressed as s=d/t where t is the time taken, d is distance covered and s is the speed.

Convering s to hrs

To convert seconds to hours, we knkw that 1 hour has 60 minutes and each minute has 60 seconds. Therefore, 1 hour has 60*60=3600 seconds

If 3600s=1 h

60 s=?

By cross multiplication 60s*1 h/3600s=1/60 hours

Given distance as 5 miles and time as 1/60 hours then the speed will be 5 divided by 1/60 hrs which is equivalent to 5*60=300 miles per hour

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3 years ago

A polar bear runs at a speed of 11 m/s and has a mass of 380.2 kg. How much Kinetic energy does the bear have?

Yanka [14]

Answer:

$\boxed{\sf Kinetic \ energy \ of \ the \ bear (KE) = 23002.1 \ J}$

Given:

Mass of the polar bear (m) = 6.8 kg

Speed of the polar bear (v) = 5.0 m/s

To Find:

Kinetic energy of the polar bear (KE)

Explanation:

Formula:

$\boxed{ \bold{\sf KE = \frac{1}{2} m {v}^{2} }}$

Substituting values of m & v in the equation:

$\sf \implies KE = \frac{1}{2} \times 380.2 \times {11}^{2}$

$\sf \implies KE = \frac{1}{ \cancel{2}} \times \cancel{2} \times 190.1 \times 121$

$\sf \implies KE = 190.1 \times 121$

$\sf \implies KE = 23002.1 \: J$

$\therefore$

Kinetic energy of the polar bear (KE) = 23002.1 J

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3 years ago

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andre [41]

Answer:

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Explanation:

Change in Kinetic energy = Change in Potential energy

= 12,928J - 3715J

=9213 J

For more assistance: +1 (304) 223-3136

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3 years ago