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3 years ago

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?

Physics

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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3 years ago

Two long straight parallel wires are separated by 7.0cm. There is a 2.0A current flowing in the first wire. If the magnetic fiel

aliina [53]

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The current in the second wire is 4.4 A.

Explanation:

Given that,

Distance =7.0 cm

Current in first wire = 2.0 A

The magnetic field strength is zero at distance of 2.2 cm from the first wire.

We need to calculate the current in the second wire

Using formula of magnetic field

$B=B_{1}-B_{2}$

$0=\dfrac{\mu_{0}I_{1}}{2\pi r_{1}}-\dfrac{\mu_{0}I_{2}}{2\pi r_{2}}$

$\dfrac{\mu_{0}I_{1}}{2\pi r_{1}}=\dfrac{\mu_{0}I_{2}}{2\pi r_{2}}$

$\dfrac{I_{1}}{r_{1}}=\dfrac{I_{2}}{(d-r_{1})}$

Here, $r_{2}=d-r_{1}$

$I_{2}=\dfrac{I_{1}\times(d-r_{1})}{r_{1}}$

Put the value into the formula

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4 0

3 years ago

1) Roland has built a circuit, and is using a device called an ammeter to measure how quickly electrical current is flowing thro

zaharov [31]

Answer:

1) 3.9 %

2) 1,38 kg

3) 0.13 cubic meters

Explanation:

Part 1)

Calculated current = 0.180 amps

Measured current: 0.173 amps

percent error : $\frac{0.180 - 0.173}{0.180} \,100=3.9$ %

Part 2)

mass1 = 1,155 kg

mass2 = 0.22 kg

Addition; 1.155 + 0.22 = 1 375 kg which should be rounded to just two decimals according to the addition rules for uncertainties:

Answer : 1,38 kg

Part 3)

Volume = 0.885 x 0.20 x 0.75 cubic meters = 0.13275 cubic meters

Notice that the smallest number of significant figures among the set of dimension given is two. Therefore, our answer should be rounded to two significant figures. That is:

Volume = 0.13 cubic meters

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3 years ago