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4 years ago

Recall what you learned about the state of Virginia. Choose the statements that describe the paleontology of the

Physics

2 answers:

tamaranim1 [39]4 years ago

8 0

Answer:

The rocks in Virginia represent many periods in history.

Virginia was once covered by a sea.

The Allegheny Plateau includes coal deposits

The state’s climate was once warm and humid, like a tropical jungle.

Explanation:

ANSWER

velikii [3]4 years ago

7 0

Answer:

1)The rocks in Virginia represent many periods in history.

2)Virginia was once covered by a sea.

3)The Allegheny Plateau includes coal deposits.

4)The state’s climate was once warm and humid, like a tropical jungle.

Explanation:

hope this helps!!!

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A stone dropped from the root of a high buliding . A second stone is dropped 1.30 s later How far apart are the stones when the

oksian1 [2.3K]

Answer:

The stones are apart one each the other 26.37 meters when the second one has reached a speed of 14 m/s.

Explanation:

<u>Second Stone:</u>

Vb= g*t

tb (14m/s)= Vb/g

tb (14m/s)= (14 m/s) / (9.8 m/s²)

tb (14m/s)= 1.42 sec

Hb= (g * tb²)/2

Hb= 9.88m

<u>First Stone:</u>

ta= tb + 1.3 sec

ta= 2.72 sec

Ha= (g*ta²)/2

Ha= 36.25m

Distance between Stones:

Ha-Hb= 36.25m - 9.88m

Ha-Hb= 26.37m

6 0

4 years ago

13. A hiker walks 200 m west and then walks 100 m north. In what direction is her resulting displacement?

prohojiy [21]

100m north west is the answer

4 0

3 years ago

Read 2 more answers

Two charges, qA and qB, are separated by a distance, r, and exert a force, F, on each other. What new force will exist for the f

ioda

Answer:

$\frac{1}{2}F$

Explanation:

The magnitude of the electrostatic force between two charges is given by Coulomb's law:

$F=k\frac{q_1 q_2}{r^2}$

where:

$k=9\cdot 10^9 Nm^{-2}C^{-2}$ is the Coulomb's constant

$q_1, q_2$ are the two charges

r is the separation between the two charges

In this problem, at the beginning we have:

$q_1=q_A$ is the first charge

$q_2=q_B$ is the second charge

r is their initial separation

So the initial force is

$F=k\frac{q_A q_B}{r^2}$

Later, we have:

qA is doubled and r is doubled

This means that:

$q_A'=2q_A$ is the new charge

$r'=2r$ is the new separation

So the new force is:

$F'=k\frac{q_A' q_B}{r'^2}=k\frac{(2q_A)(q_B)}{(2r)^2}=\frac{1}{2}(k\frac{q_A q_B}{r^2})=\frac{1}{2}F$

3 0

3 years ago

I WILL GET BRAINLIEST PLS HELP A student attempts to push a box across the floor. The student decides to create a free-body diag

MissTica

Answer: The gravitational

Explanation: The student is pushing the box so u have to have gravitational force so it could move

5 0

3 years ago

If the electron e − and the positron e + both have rest energy 0.51 MeV, nd the minimum energy a particle of light γ (a photon)

QveST [7]

Answer:

For Total energy and momentum to be conserved, the minimum energy of the photons released is equal to twice the rest mass energy of an electron that is $2 \times 0.51 MeV = 1.02 MeV$

The annihilation of electron -positron cannot produce a single photon. It is prohibited by the law of conservation of energy and momentum.

3 0

4 years ago