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3 years ago

Which term describes the difference in electrical charge across a membrane?

Physics

1 answer:

hammer [34]3 years ago

7 0

Membrane potential, it’s the difference in electrical charge across the membrane.

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A train travels 60 miles per hour for 3 hours and then 45 miles per hour for 2 hours. What is the train’s average speed in miles

eimsori [14]

Answer:

Explanation:

Average speed is given by

Total distance/ total time taken

So we need to know the distance in the first travel

Then

First part

Speed=60miles/hour

Time 3hours

Distance = speed × time

Distance = 60×3

Distance = 180 miles

Second part

Speed 45mile/hour

And time is 2hours

Distance = speed × time

Distance = 45× 2

Distance = 90miles

So total distance travelled for both cases is 90+180=270miles

And total time is 5hours

Then,

Average speed = total distance/total time

A.S=270/5

A.S= 54miles/hour

5 0

3 years ago

Read 2 more answers

An electron, tial well may be anywhere within the interval 2a. So the uncertainty in its position is Î”x= 2a. There must be a co

lapo4ka [179]

Answer:

$K = \frac{h'}{8 m \ \Delta x^2}$ K

Explanation:

The Heisenberg uncertainty principle is

Δx Δp ≥ h' / 2

h’ = $\frac{h}{2\pi }$

The kinetic energy of a particle is

K = ½ m v²

p = mv

v = $\frac{p}{m}$

substitute

K = $\frac{1}{2} \frac{p^2}{m}$

from the uncertainty principle,

Δp = $\frac{h'}{2 \ \Delta x}$

we substitute

K = $\frac{1}{2m} ( \frac{h'}{2 \ \Delta x})^2$

$K = \frac{h'}{8 m \ \Delta x^2}$

4 0

3 years ago

Felipe believes that whenever the Moon is in the position that is shown from above (top view) in Diagram A, the Moon always look

taurus [48]

Answer:he is incorrect

Explanation:he is wrong because if the sunlight is on the opposite side of the earth than the moon, then the sunlight would be blocked by the earth, making the moon dark, because the moon gets its light from the light that is reflected of the surface from the sun

8 0

3 years ago

A brick sits on the top of a hill with a gravitational potential energy of 245 J. To determine the gravitational potential of th

Bogdan [553]

Answer:

The mass of the object, its acceleration due to gravity and the distance between the top of the hill and the ground level.

Explanation:

gravitational potential energy is the energy possessed by a body under influence of gravitational force by virtue of its position.

In order to determine the gravitational potential energy of the brick, we must know the mass (m) of the brick, its acceleration due to gravity (g) since it is acting under the influence of gravitational force and the distance between the top of the hill and the ground level. (The height).

Potential energy of a body is calculated as mass × acceleration due to gravity × height.

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3 years ago

What type(s) of energy is/are contained in a roller coaster car after it has come to a complete stop at the station? A. kinetic

blondinia [14]

Answer:

I think it is just potential

Explanation:

If it’s right pls mark the brainliest

7 0

3 years ago