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3 years ago

Question 5 (1 point)

Physics

1 answer:

Andre45 [30]3 years ago

5 0

The symbol most often used to represent electric current is ' <em>I</em> '.

That's a "capital eye", not a "one".

The unit of measurement of electric current is the Ampere, ' <em>A</em> '.

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An ion accelerated through a potential difference of 115 V experiences an increase in kinetic energy of 7.37 x 1017 J. Calculate

riadik2000 [5.3K]

Answer: $6.408(10)^{-19} C$

Explanation:

This problem can be solved by the following equation:

$\Delta K=q V$

Where:

$\Delta K=7.37(10)^{-17} J$ is the change in kinetic energy

$V=115 V$ is the electric potential difference

$q$ is the electric charge

Finding $q$ :

$q=\frac{\Delta K}{V}$

$q=\frac{7.37(10)^{-17} J}{115 V}$

Finally:

$q=6.408(10)^{-19} C$

4 0

3 years ago

Which two charges of a magnet will attract?

ale4655 [162]

Answer:

The other end is called the south pole. When two magnets are brought together, the opposite poles will attract one another, but the like poles will repel one another. This is similar to electric charges.

Explanation:

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2 years ago

Read 2 more answers

You wad up a piece of paper and throw it into the wastebasket. How far will

astraxan [27]

Answer:

Since the paper is wadded up tight, and if there's any

air resistance left we assume there isn't any, it might

just as well be a stone that's tossed. This is just a

stripped down projectile situation.

You said "an angle of 36 degrees", but you didn't say relative

to what. I'll assume that it's 36 degrees above horizontal, and

now I'll proceed to answer the question with the information that

I just gave myself.

-- The vertical component of the velocity is 1.4 sin(36)

= 0.823 m/s up.

-- The projectile rises for (0.823/9.8) second, runs out of gas,

and then falls for another (0.823/9.8) second to its original height.

So it's in the air for

2 (0.823/9.8) = 0.168 second

(not very long at all)

-- The horizontal component of the velocity is 1.4 cos(36)

= 1.133 m/s

and it doesn't change.

-- During the 0.168 second that it's in the air,

the wad travels horizontally

(0.168 s) x (1.133 m/s)

= 0.19 meter

(19 cm, ~ 7.5 inches)

If you find my mistake on this one, please please tell me.

As of now, it looks like with that velocity at that angle, your

paper wad only makes it 7.5 inches from your hand into the can.

Explanation:

6 0

3 years ago

Read 2 more answers

Water flowing through a cylindrical pipe suddenly comes to a section of pipe where the diameter decreases to 86% of its previous

Orlov [11]

Answer:

Explanation:

The speed of the water in the large section of the pipe is not stated

so i will assume 36m/s

(if its not the said speed, input the figure of your speed and you get it right)

Continuity equation is applicable for ideal, incompressible liquids

Q the flux of water that is Av with A the cross section area and v the velocity,

so,

$A_1V_1=A_2V_2$

$A_{1}=\frac{\pi}{4}d_{1}^{2} \\\\ A_{2}=\frac{\pi}{4}d_{2}^{2}$

the diameter decreases 86% so

$d_2 = 0.86d_1$

$v_{2}=\frac{\frac{\pi}{4}d_{1}^{2}v_{1}}{\frac{\pi}{4}d_{2}^{2}}\\\\=\frac{\cancel{\frac{\pi}{4}d_{1}^{2}}v_{1}}{\cancel{\frac{\pi}{4}}(0.86\cancel{d_{1}})^{2}}\\\\\approx1.35v_{1} \\\\v_{2}\approx(1.35)(38)\\\\\approx48.6\,\frac{m}{s}$

Thus, speed in smaller section is 48.6 m/s

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2 years ago

Surgical repair of a muscle

Misha Larkins [42]

A myoplasty is the surgical repair of a muscle.

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3 years ago