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IRINA_888 [86]
2 years ago
9

6. The first vertebrates appeared during

Physics
1 answer:
RUDIKE [14]2 years ago
6 0

Answer:

b. the Paleozoic Era

Explanation:

The first vertebrates to appear are primitive fish in the Cambrian Period, but bony fishes with actual bony vertebratae didn't appear for another 100 million years. The Cambrian Period is the first of three periods in the Paleozoic Era. The Cambrian explosion was an event when practically all major animal phyla started appearing in the fossil record.

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What was Neptune's distance from the Sun in 1989?
Studentka2010 [4]

Answer:

4.5 Billion km :)

Explanation:

thats how it is

7 0
4 years ago
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Which is an example of a way that
geniusboy [140]

Answer:

C Thy make the force exert all at once

4 0
3 years ago
A 51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. What is her speed?
arlik [135]

Kinetic energy of woman is given as

KE = 9.96 \times 10^4 J

mass of woman is given as

m = 51 kg

now we will have

KE = \frac{1}{2}mv^2

9.96 \times 10^4 J = \frac{1}{2}(51) v^2

v^2 = \frac{9.96 \times 10^4}{25.5}

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8 0
4 years ago
There is a current I flowing in a clockwise direction in a square loop of wire that is in the plane of the paper. If the magneti
MArishka [77]

Answer:

IBL²

Explanation:

Given that

Current flowing in the wire, is I

Magnetic field towards the right, is B

Length of each side of the loop, is L

Number of windings on the loop, is N

Torque exerted on the wire, is T

The torque, T is usually given by the formula

Torque, T = NBIAsinθ,

and if N = 1 and sinθ = 1 also, then we have

Torque, T = BIA

And we know that Area A from this particular question will be given as = L². If we then substitute A for L², we then have

Torque, T = IBL²

4 0
3 years ago
We can see Newton’s 3rd law everyday when what ?
bezimeni [28]

Answer:

answer down below

Explanation:

hi! newton's third law applies to a lot of things. this is shown when we jump, bounce a ball, or push something, for example. the law states that for every action, there an equal and opposite reaction. when you bounce a ball, it bounces back up at the same force at which you dropped it.

hope this helps!

7 0
3 years ago
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