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Roman55 [17]
3 years ago
11

Help with a length problem

Physics
2 answers:
Andru [333]3 years ago
6 0
It would be B

Explanation:
Because if you're not measuring in inches you want to go the next one down other than inches which would be millimeters!(: hope this helps.
Nat2105 [25]3 years ago
5 0

Answer:

B. Millimeters

Explanation:

Milliliters is a unit for volume

Millimeters are length, so its suitable for this.

Kilometers is also a unit used for length but its too big for a shoe measurement.

Kilograms is a unit for weight.

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Romeo (81.0 kg) entertains Juliet (53.0 kg) by playing his guitar from the rear of their boat at rest in still water, 2.70 m awa
den301095 [7]

Answer:

0.64 m

Explanation:

The first thing is calculate the center of mass of the system.

X_{cm}= \sum_{n=1}^{n}\frac{X_n\times M_n}{M_n}

now multiplying every coordinate x by the mass of each object (romeo, juliet and the boat) and dividing all by the total mass  taking by reference the position of juliet.

X_{cm}=\frac{53\times0 +81\times2.7+79\times1.35}{53+81+79}

X_cm = 1.4589 m

When the forces involved are internals, the center of mass don't change  

After the movement the center of mass remains in the same distance from the shore, but change relative to the rear of the boat.

X_{cm}=\frac{79\times1.35+(81+53)\times2.7}{53+81+79}

X_cm= 2.10 m

this displacement is how the boat move toward the shore.

2.10-1.46= 0.64 m

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3 years ago
g If the momentum of an electron doubles, by what factor would its de Broglie wavelength be multiplied
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Explanation:

The de broglie wavelength is given by :

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p is momentum

Momentum and De-Broglie wavelength has inverse relationship. If momentum of an electron double, its wavelength gets half.

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