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4 years ago

Which describes the attraction or repulsion caused by magnets?

1 answer:

7 0

I think the correct answer from the choices listed above is the second option. It is magnetic force that describes the attraction or repulsion caused by magnets. This <span>arises between electrically charged particles because of their motion. Hope this answers the question.</span>

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A dolphin jumps out of the water. As it falls back down it a clerated at a rate of -9,8m/s^2 for 0.8 seconds of free fall. To ca

Anettt [7]

Answer:

0.196 m

Explanation:

Given in the question that,

time taken by the dolphin to go back to water = 0.2 sec

To solve the question we will use Newton's Law of motion

here S is distance covered

u is initial speed

a = acceleration due to gravity

t = time taken

Plug value in the equation above

S = 0(0.2) + 0.5(-9.8)(0.2)²

S = 0.5(-9.8)(0.2)²

S = -0.196 m

Negative sign represent direction

(Assuming that dolphin have a vertical straight jump not a projectile motion)

4 0

3 years ago

Summerize: Newton's first law of motion by telling how an object in motions inertia changed and how an object at rest is affecte

valina [46]

Answer:

Object in motion: By the Newton's first law about inertia, an object in motion tends to keep in motion, unless an external force act on it.

Object at rest: By the Newton's first law about inertia, an object at rest tends to keep at rest, unless an external force act on it.

4 0

3 years ago

55N of force are applied onto a table, but the force of friction is 8N. What is the net force acting on the table? Please explai

nirvana33 [79]

Answer:

get a tutor or something to help man

Explanation:

8 0

3 years ago

Light from a laser strikes a diffraction grating that has 5500 lines per centimeter. The central and first-order maxima are sepa

WINSTONCH [101]

.Answer:

491.4 nm

Explanation:

The distance between central and first maxima is,

$y=0.455m$

And the distance between screen abnd grating is,

$L=1.62 m$

Now the angle can be find as,

$tan\theta=\frac{y}{L} \\\theta=tan^{-1}(\frac{0.455}{1.62}) \\\theta=15.68^{\circ}$

Now the grating distance is,

$d=\frac{1}{5500} cm\\d=1.82\times 10^{-6}m$

Now with m=1 condition will become,

$\lambda=dsin\theta$

So,

$\lambda=1.82\times 10^{-6}m\times sin(15.68^{\circ})\\\lambda=1.82\times 10^{-6}m\times 0.270\\\lambda=491.4\times 10^{-9}m\\\lambda=491.4 nm$

Therefore the wavelength of laser light is 491.4 nm.

3 0

3 years ago

Large bodies of water help to keep nearby climates from being too hot or too cold because they

Ludmilka [50]

Large bodies of water help to keep nearby climates from being too hot or too cold because they absorb heat in the summer and slowly release that heat in the winter.

So your answer is absorb

7 0

4 years ago