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Elenna [48]
3 years ago
5

An 80-eV electron impinges upon a potential barrier 100 eV high and 0.20 nm thick. What is the probability the electron will tun

nel through the barrier

Mathematics
1 answer:
wlad13 [49]3 years ago
3 0

Answer:

0.011%

Step-by-step explanation:

See attached picture.

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help At 1:00 P.M. the water level of a pool is 13 inches At 1:30 P.M. the water level is 18 inches At 2:30 the water level is 28
mamaluj [8]
The answer is 5 . because if you count the # it will go to 28
7 0
3 years ago
How many times greater is<br> 3.8 x 105<br> than<br> 1.9 X 1022<br> 2<br> 20<br> 200<br> 2000
PilotLPTM [1.2K]

Step-by-step explanation:

there must be something wrong with your text.

what we can see is

3.8 × 105

and

1.9 × 1022

the true answer for these values has nothing to do with the 4 answer options.

maybe you meant

1.9 × 10.5 ?

because that answer would be 20.

but first working with the presented numbers :

3.8 × 105 = 399

1.9 × 1022 = 1941.8

so, the second number is actually much bigger than the first number.

but if it is

1.9 × 10.5 = 19.95

that works.

and we can either use the calculator to calculate

399 / 19.95 = 20

or we can simply look at the factor changes of the multiplication terms.

3.8 = 1.9 × 2

105 = 10.5 × 10

so, the multiplication product of the two larger numbers is then 2×10=20 times larger than the product of the 2 smaller numbers.

7 0
3 years ago
Help asap will give brainliest to whoever answer's correctly.
nydimaria [60]

Answer:

cant see the image

Step-by-step explanation:

8 0
3 years ago
On a number line the directed line segment from Q to S has endpoints Q at -14 and S at 2. Point R partitions the directed line s
liq [111]

Answer:

Step-by-step explanation:

The distance from Q to S is 2 - (-14), or 16.

We start at point Q.  Note how 3 and 5 add  up to 8, which allows us to write:

R = Q + (3/8)(16), or R = -14 + 6, or R = -8.

From R to S it is (5/8)(16), or 10 units.

The directed line segment is partitioned into segments of lengths 6 and 10, whose combined length is 16, as expected.

8 0
3 years ago
Read 2 more answers
Consider the equation: 12x=13-x^212x=13−x 2 12, x, equals, 13, minus, x, squared 1) Rewrite the equation by completing the squar
Flauer [41]

Answer:

(x + 6)^2 = 49

x = 1    or x = -13

Step-by-step explanation:

Given

12x = 13 - x^2

Using Completing the Square

12x = 13 - x^2 ---- Add x^2 to both sides

x^2 + 12x = 13 - x^2 + x^2

x^2 + 12x = 13

Divide the coefficient of x by 2; then add the square to both sides

x^2 + 12x + 6^2 = 13 + 6^2

x^2 + 12x + 36 = 13 + 36

x^2 + 12x + 36 = 49

Factorize

x^2 + 6x + 6x + 36 = 49

x(x + 6) + 6(x + 6) = 49

(x + 6)(x + 6) = 49

(x + 6)^2 = 49

Hence, the equation is (x + 6)^2 = 49

Solving further

Take square root of both sides

(x + 6) = \sqrt{49}

x + 6 = \±7

x  = \±7- 6

This implies that

x = 7 - 6     or x = -7 -6

x = 1    or x = -13

HEnce, the solutions are x = 1    or x = -13

6 0
3 years ago
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