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fgiga [73]
2 years ago
6

If an object moves with constant acceleration, its velocity must

Physics
1 answer:
mezya [45]2 years ago
5 0

Answer:20 m/s. ... 10 m/s. If an object moves with constant acceleration, its velocity must. change by the same amount each second.

Explanation:

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Irina finds an unlabeled box of fine needles, and wants to determine how thick they are. A standard ruler will not do the job, a
Vsevolod [243]

Answer:

d=\frac{1.22\times 640\times 10^{-9}\times 21.7}{7.35\times 10^{-2}}=2305.21\times 10^{-7}m

Explanation:

The expression which represent the first diffraction minima by a circular aperture is given by d sin\Theta =1.22\lambda--------eqn 1

The angle through which the first minima is diffracted is given by tan\Theta =\frac{y_1}{D}---------eqn 2

As \Theta is very small so we can write sin\Theta =tan\Theta

So from eqn 1 and eqn 2 we can write

y_1=\frac{1.22\lambda D}{d}--------eqn 3

Here y_1 is the position of first maxima D is the distance of screen from the circular aperture d is the diameter of aperture

It is given that diameter of circular aperture is 14.7 cm so y_1=\frac{14.7}{2}=7.35 \ cm

Now putting all these value in eqn 3

d=\frac{1.22\lambda D}{y_1}

d=\frac{1.22\times 640\times 10^{-9}\times 21.7}{7.35\times 10^{-2}}=2305.21\times 10^{-7}m

8 0
3 years ago
As you move from left to right across a period the number of valances electrons
oksian1 [2.3K]
The valence electrons increase as you move left to right.
3 0
3 years ago
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A gas has an initial volume of 168 cm3 at a temperature of 255 K and a pressure of 1.6 atm. The pressure of the gas decreases to
erastovalidia [21]
Would presume you are asked to find the volume, since there is no second volume.

By General Gas Law:

P₁V₁/T₁ = P₂V₂/T₂

1.6 * 168 /255 = 1.3*V₂/285

V₂ = 1.6 * 168 * 285 / (1.3*255)

V₂ = 231.095

Final volume ≈ 231 cm³
7 0
3 years ago
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Need help with 6 , 7 , and 8.
tankabanditka [31]

Six.

If you want to double the force, you need to double either v or B. Changing the angle does not give totally predictable results. The formula is

F = q*v*B Sin(theta) altering theta isn't linear. Doubling B is. The answer is A

Seven

Seven is correct. The poles on a magnet is where the field is the strongest.

Eight

I can't really answer this question. Much depends on where you are and whether or not the readings are true or erratic. It is taking only one parameter into account where in reality there are many. My guess would be that as you move up the longitude the angle increases. So the answer would be near but not at the north pole. Seek out your notes for confirmation.

7 0
3 years ago
5) A 5 kg watermelon is raised 3 m by carrying it up the stairs to the second
Nutka1998 [239]

Answer: 150J

Explanation:

m = 5 kg

g = 10 m/s2

h = 3m

P.E = mgh

P.E = 5 x 10 x 3

P.E = 150J

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3 years ago
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