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3 years ago

Which statement correctly summarizes Wegener’s theory of continental drift?

Physics

2 answers:

Bezzdna [24]3 years ago

8 0

Answer:

Over tens of millions of years, the giant supercontinent Pangaea began to slowly drift apart, forming the continents as they are known today.

Explanation:

Kipish [7]3 years ago

7 0

Answer:

the answer is D

Explanation:

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A small 20-kg canoe is floating downriver at a speed of 2 m/s. What is the canoe’s kinetic energy? A. 40 J B. 80 J C. 18 J

rusak2 [61]

A small 20-kg canoe is floating downriver at a speed of 2 m/s. 40 J is the canoe’s kinetic energy.

Answer: Option A

<u>Explanation:</u>

The given canoe has the mass and is being given to move at a speed. Therefore the kinetic energy of the canoe can be calculated using the following method,

Given that mass of the canoe = 20 kg and its speed =1 m/s

As we know that the Kinetic energy has the formula,

$\text {Kinetic energy}=\frac{1}{2} \boldsymbol{m} \boldsymbol{v}^{2}$

Therefore, substituting the value into the equation, we get,

$K . E .=\frac{1}{2} \times 20 \times 2^{2}$ = 40 J

4 0

4 years ago

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Four electrons are located at the corners of a square 10.0 nm on a side, with an alpha particle at its midpoint.

dimulka [17.4K]

The work done by the Coulomb force will be " $6.08\times 10^{-21} \ J$ ".

Let us define the required work done to move that alpha particle to the one of the mid point of the side length as follows.

→ $W = \frac{4kqQ}{r_1} -(\frac{2kqQ}{r_2} +\frac{2kqQ}{r_3} )$

→ $=2kqQ(\frac{2}{r_1} -\frac{1}{r_2} -\frac{1}{r_3} )$

→ $=2(8.99\times 10^9)(-1.6\times 10^{-19})(2)(1.6\times 10^{-19})$

→ $= (\frac{2}{\sqrt{(5\times 10^{-9})^2+(5\times 10^{-9})} } -\frac{1}{(5\times 10^{-9})} -\frac{1}{\sqrt{(10\times 10^{-9})^2} +(5\times 10^{-9})^2} )$

→ $= 6.08\times 10^{-21} \ J$

Thus the above answer is appropriate.

Learn more about work done here:

brainly.com/question/24716770

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2 years ago

Help pls !!! Which statement is true for nuclear reactions but not for chemical reactions?

iris [78.8K]

Answer:

Explanation: this is why they have so much more energy released

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3 years ago

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Nick and Mike are facing each other on skateboards. They touch palms and push off each other. Which best describes their movemen

Sever21 [200]

A word that would describe their movement would be force. the push is a force that keeps them away.

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3 years ago

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Plasma easily conducts electricity and responds to magnetic fields, but why?

Valentin [98]

Explanation:

Plasma can conduct electricity because plasma consists of electrically charged particles called ions, instead of uncharged particles such as atoms or molecules.

6 0

4 years ago