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3 years ago

21. The speed of light is approximately 3.00 x 108 m/s. What is the speed of light in miles per hr?

Physics

1 answer:

postnew [5]3 years ago

7 0

Answer:

6.7*10^8 mi/hr

Explanation:

(3*10^8 m)/1s * (3600 s)/ 1 hr * (1 mi)/ 1609 m

6.7*10^8 mi/hr

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Displacement is which of the following types of quantities?A. vectorB. scalarC. magnitudeD. dimensional

agasfer [191]

Answer: A. vector

Explanation:

Movement is the change of position of a body at a certain time. The body that experiences this change of position is called mobile.

In this sense, the displacement is the distance in a straight line between the initial and final position of this mobile, which differentiates it from the trajectory, which is the path followed by the body in its movement and a scalar magnitude.

Hence, the displacement is a vector.

6 0

2 years ago

Static electricity is a ____ charge. missing temporary flowing permanent

adoni [48]

Answer:

static electricity is a flowing charges

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1 year ago

A 100-kg astronaut floating in space holds a 10-kg object. Then the object is tossed at 50 m/s. How fast does the astronaut go a

zlopas [31]

Answer:

velocity is 5 m/s

Explanation:

mass of astronaut (M)=100kg

mass of object (m)=10kg

Initially they are rest , so initial velocity (u)= 0 m/s

Final velocity of object ; $v_1=10m/s$

let final velocity of astronaut = $v_2$ (Unknown)

Now , By conservation of linear momentum

Initial momentum = Final momentum

$(m + M)\times u = (m\times v_1) + (M\times v_2)$

Now insert values

$0 = (10 kg \times 50 m/s ) + (100 kg \: v_2)$

Further simplifying

$v_2=-\frac{500 kg-m/s}{100kg}$

So,

$v_2= -5\:m/s$

So, velocity is 5 m/s (the negative sign is due to direction)

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3 years ago

A student argues that Pluto cannot be a trans-Neptunian object because Pluto is a planet, and trans-Neptunían objects include on

VashaNatasha [74]

The answer would be C.

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2 years ago

question how does the gravitational field gx at the surface of planet x compare with the gravitational field gy at the surface o

siniylev [52]

The gravitational field gx at the surface of planet x (M/m)(r/R)² times the gravitational field gy at the surface of planet y.

<h3>What is gravitational field?</h3>

A gravitational field, as defined by physics, is the influence a massive body has on the area surrounding it, exerting a force on another huge body. In other words, a gravitational field, which is measured in newtons per kilograms (N/kg), aids in the explanation of gravitational field.

Now, Let planet x has mass M and radius R: then gravitational field at the surface of planet: gₓ = GM/R².

Let planet y has mass m and radius r: then gravitational field at the surface of planet: $g_y$ = Gm/r².

Hence, gₓ/ $g_y$ = (M/m)(r/R)².

So, the gravitational field gx at the surface of planet x (M/m)(r/R)² times the gravitational field gy at the surface of planet y.

Learn more about gravitational field here:

brainly.com/question/12324569

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8 0

1 year ago