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2 years ago

14

Michael decided to build a model roller coaster with a car that has a mass of 3 kg. If at point c it travels 6 m/s, what is the

kinetic energy at this point

1 answer:

grigory [225]2 years ago

8 0

Kinetic energy = $\frac{1}{2}mv^{2}$

Mass = 3kg and Velocity = 6 m/s so....

KE = $\frac{1}{2} (3)(6)^{2}$

KE = 54 J

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Why is the overall charge of the atom neutral or zero?

MrRissso [65]

Answer:

B

Explanation:

this is because the neutrons do not have a charge, the things that have charge in an atom are electrons and protons.

and in the nucleus of an atom, there are protons and neutrons so you can see that A is not the answer

if you see the periodic table, you will know that the number of electrons and protons are equal, so the charges cancel each other out, hence the charge of an atom will be neutral

let me give you a tip which I got from my teacher, never write there is no charge in the atom, this suggests that there is no protons or electrons.

instead, write, the it is neutral

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2 years ago

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PIT_PIT [208]

Answer:

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For net magnetic field current must be in opposite direction as in inner circle

We know that magnetic field is given due to circular coil is given by

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For net magnetic field zero

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So $\frac{170\times \mu _0\times 8.9}{2\times 0.0095}=\frac{150\times \mu _0I_O}{2\times 0.015}$

$I_O=15.92A$

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2 years ago

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kolbaska11 [484]

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2 years ago

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blondinia [14]

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The part b and c of this question is done in the attachment

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2 years ago