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2 years ago

12

Matter's resistance to a change in motion is called _____ and is directly proportional to the mass of an object. For an object t

o change its state of motion, a force must be applied to it?

2 answers:

andre [41]2 years ago

8 0

Inertia is your answer that goes in the blank space

Mazyrski [523]2 years ago

5 0

Inertia

A bowling ball has a higher inertia than bowling pins, as it weighs significantly more than the pins.

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Why is the sun so far away

aev [14]

Answer:

If it was close we would die.

Explanation:

Probably has something to do with the earths original formation.

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2 years ago

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If you could shine a very powerful flashlight beam toward the Moon, estimate the diameter of the beam when it reaches the Moon.

grin007 [14]

To develop this problem it is necessary to apply the Rayleigh Criterion (Angular resolution)criterion. This conceptos describes the ability of any image-forming device such as an optical or radio telescope, a microscope, a camera, or an eye, to distinguish small details of an object, thereby making it a major determinant of image resolution. By definition is defined as:

$\theta = 1.22\frac{\lambda}{d}$

Where,

$\lambda$ = Wavelength

d = Width of the slit

$\theta$ = Angular resolution

Through the arc length we can find the radius, which would be given according to the length and angle previously described.

The radius of the beam on the moon is

$r = l\theta$

Relacing $\theta$

$r = l(\frac{1.22\lambda}{d})$

$r = 1.22\frac{l\lambda}{d}$

Replacing with our values we have that,

$r = 1.22*(\frac{(384*10^3km)(\frac{1000m}{1km})(550*10^{-9}m)}{7*10^{{-2}}})$

$r = 3680.91m$

Therefore the diameter of the beam on the moon is

$d = 2r$

$d = 2 * (3690.91)$

$d = 7361.8285m$

Hence, the diameter of the beam when it reaches the moon is 7361.82m

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3 years ago

A truck traveling at a velocity of 33m/s comes to a halt by decelerating at 11m/s^2. How far does the truck travel in the proces

snow_lady [41]

Answer:

<u><em>The truck was moving 16.5 m/s during the time it took to stop, which was 3 seconds. </em></u>

<u><em>Initial velocity = 33 m/s</em></u>

<u><em>Final velocity = 0 m/s</em></u>

<u><em>Average velocity = (33 + 0) / 2 m/s = 16.5 m/s</em></u>

Explanation:

<u><em>First, how long does it take the truck to come to a complete stop?</em></u>

<u><em>( 33 m/s ) / ( 11 m / s^2 ) = 3 seconds</em></u>

<u><em>Then we can look at the average velocity between when the truck started decelerating and when it came to a complete stop. Because the deceleration is constant (always 11m/s^2) we can use this trick.</em></u>

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2 years ago

What happens to the current as we increase the amount of stepping of our transformer? Does this help explain why the primary was

matrenka [14]

Answer:

Current will decrease.

Explanation:

When we increase the number of stepping in transformer, the voltage will increase as its is directly proportional to the number of turn of stepping. Thus as the voltage will increase, current will decrease. As per the equation of ideal transformer, E1 / E2 = I2 / I1

E1 and E2 are the voltages in primary and secondary winding and I1 and I2 are the current.

As the number of turns will be increased more inevitable losses will be generated that dissipates heat thus warming the primary.

Though the conservation of energy is obeyed but losses occur in this scenario hence step-up transformers cannot be used to create free energy.

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2 years ago

A train travels 120 km In 2 hours and 30 minutes what’s its average speed

dangina [55]

Formula for distance is d=st
so for speed is s=d/t
48 km per hour

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2 years ago

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