PHYSICS HIGH SCHOOL

Jawless fish and ocean reefs were devastated by which extinction? Late Devonian

Ordovician-Silurian

Permian-Triassic

End Triassic

Cretaceous-Tertiary

Answers

Answer 1
Answer: Late Devonian (I believe)
Answer 2
Answer:

The Late Devonian.

If you go back and reach the text, you may find the passage, "Which species did we lose during this extinction (Late Devonian)? About 20% of all animal families and 70-80% of all animal species were lost. Major victims included the following:

....

- Jawless fish"

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a Mac Laren:625hp; 1375kg
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The power associated with one horsepower is 735.5 watts

Answers

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Which is faster, the Kawasaki Ninja H2R or the Bugatti?

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A bike is faster than a Lamborghini, right?

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Once the magnet moved closest to the loop in the forward direction, under normal magnet polarity, the approximate magnitude of the induced current shown on the galvanometer was mA.Once the magnet moved closest to the loop in the reverse direction, under normal magnet polarity, the approximate magnitude of the induced current shown on the galvanometer was mA.



Once the magnet moved closest to the loop in the forward direction, under reversed magnet polarity, the approximate magnitude of the induced current shown on the galvanometer was mA.

Answers

Answer:

2, 2, 2

Explanation:

Answer:

2, 2, 2

Explanation:

correct on edge

Which statement is true about a polarized object?

Answers

The statement which is true about a polarized object would be "the number of the positive and negative charges can be the same." Polarized objects became polarized and it has its center of positive charges separated from negative charges. 

Answer:

For plato users: C.The number of positive and negative charges can be the same.

Which of these charges has the greatest magnitude?a charge of -5
a charge of -2
a charge of +4
O a charge of +1

Answers

Answer:

a charge of +4

that's how I could understand

According to Newton's 2nd law of motion, if you hit a baseball with a bat it will _____.

Answers

Answer:

The baseball will accelerate.

Explanation:

According to Newton's second law,

The force is the product of the mass and acceleration of the object.

In mathematically term

F = ma

Where, m = mass

a = acceleration

If we hit a baseball with a bat it will accelerate by the applied force.

Hence, The baseball will accelerate.
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A drag racer starts her car from rest and accelerates at 11.9 m/s2 for the entire distance of 400 m. What is the speed of the race car at the end of the run?

Answers

Speed of the race car at the end of the run is 97.57 m/s

Explanation:

We have equation of motion v² = u² + 2as

Initial velocity, u = 0 m/s  

Acceleration, a = 11.9 m/s²  

Final velocity, v = ?

Displacement,s = 400 m

Substituting  

v² = u² + 2as

v² = 0² + 2 x 11.9 x 400

v = 97.57 m /s

Speed of the race car at the end of the run is 97.57 m/s
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