3 years ago

Which of the following is an example of a material that allows electrons to easily move through it?

1 answer:

6 0

Conductors allow for charge transfer through the free movement of electrons

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Trucks 1 and 2 are traveling at the same constant velocity but truck 1's energy due to motion is two times less than that of tru

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Kinetic energy = 0.5 * m * v²

m mass
v velocity

If the velocity stays the same and the kinetic energy goes down by a factor of 2, the mass must go down by a factor of 2 also.

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2 years ago

The equation for the chemical reaction shown is not balanced. What number should replace the question mark to balance this equat

Fudgin [204]

The equation is balanced as it is.

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2 years ago

Hallar la energía mecánica de un pendulo , en un punto de su oscilación donde la energía cinética es 0,39 J y en ese mismo punto

iris [78.8K]

Answer:

E = 0,39 + 0,59 = 0,98 J

Explanation:

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2 years ago

Un libro del peso di 12 N è in equilibrio su un tavolo. Sapendo che il coefficiente di attrito statico vale 0,5, la forza di att

Tanzania [10]

Answer:

Explanation:

Translation -

A book weighing 12 N is balanced on a table. Knowing that the static friction coefficient is 0.5, how much is the friction force worth?

Friction force is

f = u * n

f = 0.5 * 12N

f = 60

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2 years ago

a sample contains 100 g of radioactive isotope. How much radioactive isotope will remain in the sample after 1 half-life?

kap26 [50]

Answer:

$\huge\boxed{50g}$

Definition:

Half-life- The time taken for half of the radioactive isotopes to decay.

Explanation:

How does radioactive decay work? Radioactive decay is a process by which unstable nuclei become more stable through the emission of alpha or beta particles or gamma rays.

Since a half-life is the time taken for half of the isotopes to decay, we can simply divide the initial mass of 100 grams by 2; this gives us 50 grams.

1) Divide 100g by 2.

$\frac{100g}{2}=50g$

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1 year ago