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3 years ago

Natural selection allows populations to (2 points)

1 answer:

3 0

<span>
adapt to a changing environment

</span><span>organisms that possess heritable traits that enable them to better adapt to their environment </span>

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The surface bedrock of mt. marcy, new york, is composed primarily of which rock?

pashok25 [27]

The answer is Anorthosite. This is a kind of intrusive igneous rock composed mainly of calcium-rich plagioclase feldspar. All anorthosites located on Earth contain of rough crystals, but some illustrations of the rock reserved from the Moon are outstandingly crystalline.

4 0

3 years ago

Charge is distributed uniformly throughout the volume of an infinitely long solid Cylinder of radius R what is the electric fiel

Arada [10]

Solution :

Let us consider the Gaussian surface that is in the form of a cylinder having a radius of r and a length of A which is $\text{coaxial with the charged cylinder}$ .

The charged enclosed by the cylinder is given by,

$q=\rho V$ (here, V = $\pi r^2l$ is the volume of the cylinder)

$=\pi r^2lp$

If $\rho$ is positive, then the electric field lines moves in the radial outward direction and is normal to Gaussian surface which is distributed uniformly.

Therefore, total flux through Gaussian cylinder is :

$\phi=EA_{cyl}$

$=E(2\pi rl)$

Now using Gauss' law, we get

$2\pi \epsilon_0rlE = \pi r^2lp$

or $E=\frac{\rho r}{2 \epsilon_0}$

Therefore, the electric field is $E=\frac{\rho r}{2 \epsilon_0}$

Hence, option (d) is correct.

8 0

3 years ago

Yasmin is testing an unknown solution to determine whether it is an acid or a base. She dips red litmus paper in the solution. I

victus00 [196]

The correct answer is D) It is not a base

7 0

3 years ago

Read 2 more answers

Which of the following scenarios will cause the current to stop flowing within a current

ella [17]

Answer:

The switch within the closed circuit is opened and it stops the flow of current in a circuit.

Explanation:

Current is defined as a flow of electrons in a system or a circuit.
There are two basic things needed for current to flow in a system
One is the electro-motive force and the other is the complete path for current to flow.
If a switch in a closed circuit gets opened, it restricts the path of current flow.
Thus it stops the current to be flowed through the circuit.

7 0

3 years ago

Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of 9q. Sphere B carries a charge of -q. Sphere C

Leona [35]

Answer:

Explanation:

A and B are touched .

charge on each of them after touching = (9q - q) / 2 = 4q

when C is touched with A

charge on A and C each after touching

= 4q + 0 / 2 = 2q

When C is touched with B

charge on each of them

(2q + 4q ) / 2 = 3 q

Final charge on C = 3q

6 0

4 years ago