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Kruka [31]
3 years ago
6

If Speed = Distance / Time, then a marble rolling 49 cm in 7 seconds is

Physics
1 answer:
german3 years ago
3 0

Distance = 49

Time = 7

49/7 = 7

7 CM/S

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The electric field strength E₀ is measured at a perpendicular distance R from an infinitely large, thin sheet that contains a un
Troyanec [42]

Answer:

Explanation:

E=(σ/ε0)

As noted by Dirac the field is the same no matter how far you are from the sheet. When your charge covers a conducting plane, as in your case, the field is, D/eo ,(D is charge density). Because the field inside the conductor (no matter how thin) is zero. The only time the field is, D/2eo, is when you have just a sheet of charge, by itself, not on a conducting plane."

5 0
4 years ago
How does electricity flow?
svp [43]
An electric current is said to exist when there is a net flow of electric charge through a region. In electric circuits this charge is often carried by electrons moving through a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionized gas (plasma).
7 0
4 years ago
g 2. In a laboratory experiment on standing waves a string 3.0 ft long is attached to the prong of an electrically driven tuning
abruzzese [7]

Answer:

The tension in string will be "3.62 N".

Explanation:

The given values are:

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l = 3 ft

or,

 = 0.9144 m

frequency,

f = 60 Hz

Weight,

= 0.096 lb

or,

= 0.0435 kgm/s²

Now,

The mass will be:

= \frac{0.0435}{9.8}

= 0.0044 \ kg

As we know,

⇒  \lambda=\frac{2L}{n}

On substituting the values, we get

⇒     =\frac{2\times 0.9144}{4}

⇒     =0.4572 \ m

or,

⇒  v=f \lambda

⇒      =0.4572\times 60

⇒      =27.432 \ m/s

Now,

⇒  v=\sqrt{\frac{T}{\mu} }

or,

⇒  T=\frac{m}{l}\times v^2

On putting the above given values, we get

⇒      =\frac{0.0044}{0.9144}\times (27.432)^2

⇒      =\frac{752.51\times 0.0044}{0.9144}

⇒      =3.62 \ N

7 0
3 years ago
What sort of trade off do you think engineers make between functionality safety and aesthetic when building a real bridge
saul85 [17]
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6 0
4 years ago
Could a vector ever be shorter than one of its components? Equal in length to one of its components? Explain.
Kruka [31]
No the vector can never be shorter than one of its components
7 0
3 years ago
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