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Lilit [14]
3 years ago
6

HELP PLEASE!!! I'M REALLY BAD AT MECHANICAL ENERGY!!!

Physics
1 answer:
deff fn [24]3 years ago
7 0
Kinetic is something moving and potential is being still

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Same object differs in water than in air?
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Answer:

Yes

Say that I have a bomb that is triggerded when it is in water. In air the bomb does not change, but in water it blows up.

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3 years ago
A car drives 500m in 2 minutes what is the cars speed?
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250 mph? i think that’s correct lol, if it is mark brainliest please;)
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3 years ago
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what kind of image is formed when the image distance is positive? what kind of image is formed when the image distance is negati
MariettaO [177]

When the image distance is positive, the image is on the same side of the mirror as the object, and it is real and inverted. When the image distance is negative, the image is behind the mirror, so the image is virtual and upright. A negative m means that the image is inverted. Positive means an upright image.

6 0
3 years ago
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A 1000 kg car is rolling slowly across a level surface at 1m/s, heading toward a group of small innocent children.
Ne4ueva [31]

Answer:

The force is -1620.73 N.

Explanation:

Given that,

Mass of car = 1000 kg

Velocity = 1 m/s

Distance = 2 m

Angle = 30°

We need to calculate the force

Using formula of work done

W_{net}=K_{f}-K_{i}

F\times d=K_{f}-K_{i}

Fd\cos\theta=-K_{i}

F=\dfrac{-K_{f}}{d\cos\theta}

F=-\dfrac{\dfrac{1}{2}mv^2}{d\cos\theta}

Put the value into the formula

F=-\dfrac{\dfrac{1}{2}\times1000\times(1)^2}{2\times\cos30}

F=-1620.73\ N

Hence, The force is -1620.73 N.

7 0
3 years ago
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From part a, you know that surface temperature is a stellar property that we infer indirectly. What must we measure directly so
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We need to directly measure the spectral type in order to determine the surface temperature of a star.

<h3>How do you find the properties of a star?</h3>

Astronomers can determine the temperature of a star by looking at its color and spectrum. The apparent brightness of a star describes how luminous it looks to us. The brightness of a star tells us how bright it really is. The luminance can be determined using both the perceived brightness and the distance.

A star's luminosity, or the total amount of energy it emits each second, is determined by two factors: The stellar photosphere's "Effective Temperature," T. the star's total surface area, which is influenced by its radius, R.

Because it controls how much fuel a star has and how quickly it burns it, a star's mass is its most fundamental characteristic. The majority of a star's life is spent burning hydrogen into helium in its core, which generates energy. The star needs to achieve a balance between gravity and outward pressure in order to continue to be "alive."

To know more about stellar property visit:

brainly.com/question/14950677

#SPJ4

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