3 years ago

Plz i need to knowwwwwwwwwew asap

Physics

1 answer:

mario62 [17]3 years ago

6 0

I can’t see it’s too blurry

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What weighs more a mole of feathers or bricks?

harkovskaia [24]

Avogadro's mole is a number, like 6.023 *10^23

your question is the equivalent of asking if 100 feathers or 100 bricks weigh more

the mole of bricks would weigh more

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2 years ago

When a person falls from certain height on cemented floor, he receives more injuries why

monitta

Explanation:

When a man falls on a hard cemented floor his momentum reduced to zero in a very short time and hurt the man. Whereas when a man falls on a heap of sand. As sand can compress, it takes longer time for the man to hit the ground (or hard surface)

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2 years ago

The speed of a wave is 40 m/s. If the wavelength is 80 centimeters, what is the frequency of the wave?

Vedmedyk [2.9K]

The speed of a wave is 40 m/s. If the wavelength is 80 centimeters, what is the frequency of the wave ?

<h3>Given:-</h3>

Velocity (V) = 40 m/s

Wavelength $(\lambda)$ = 80 cm = 0.8 m

The frequency (F) of the wave.

<h2>Solution:-</h2>

We know,

$\bf V \: = \: F \: × \: \lambda$

40 = F × 0.8

F = $\frac{40}{0.8}$

F = 50

<h3>The frequency of the wave is <u>5</u><u>0</u><u> </u><u>H</u><u>z</u>. [Answer]</h3>

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3 years ago

A driver of a 1900 kg car traveling with 460,000 J of kinetic energy must slam on the brakes in order to avoid hitting a deer in

elena-s [515]

Uhhh about 40 miles probably so round that

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2 years ago

When an electric current is flowing through a wire, the force deflecting the charged particles is the greatest when the wire is

Makovka662 [10]

The force is greatest when the wire is perpendicular to the magnetic field.

In fact, the expression for the magnetic force is
$F=ILB \sin \theta$
where I is the current, L the length of the wire, B the magnetic field intensity and $\theta$ is the angle between the directions of I and B.

We can see that F is maximum when $\sin \theta=1$ , so when $\theta = 90^{\circ}$ , so when the wire and the magnetic field are perpendicular to each other.

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2 years ago

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