3 years ago

Why is the current atomic model called the "electron could model"

1 answer:

8 0

The diagram is showing a 3d model of an atom, with all of the electrons demonstrated in a rounded shape, which resembles a cloud, thus being called an electron cloud.

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If a boat and its riders have a mass of 900 kg and the boat drifts in at 1.4 m/s how much work does sam do to stop it?

Rama09 [41]

The initial kinetic energy of the boat and its rider is
$K_i = \frac{1}{2} mv_i^2 = \frac{1}{2}(900 kg)(1.4 m/s)^2=882 J$

After Sam stops it, the final kinetic energy of the boat+rider is
$K_f = 0 J$
because its final velocity is zero.

For the law of conservation of energy, the work done by Sam is the variation of kinetic energy of the system:
$W=K_f-K_i =0-882 J=-882 J$
where the negative sign is due to the fact that the force Sam is applying goes against the direction of motion of the boat.

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3 years ago

Kinetic energy of an object is equal to

Arte-miy333 [17]

Choice-'b' says the formula for kinetic energy in words.

KE = (1/2) · (M) · (S²)

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When enough ____ is added to the substance, the solid reaches its ____ point and becomes a liquid

Ratling [72]

Answer: When enough __energy__ is added to the substance, the solid reaches its _melting_ point and becomes a liquid

Explanation: since energy is being added the substance changes phase into a liquid .

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3 years ago

An electric heating element is connected to a 110v circuit and a current of 3.2 a is flowing through the element. How much energ

Kisachek [45]

2.580 Wh.... .........

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When mapping the equipotentials on the plates with different electrode configurations you may find that some have significant ar

Olenka [21]

Answer:

v = 10 V and E = 2 10³ N/C

Explanation:

The electrical potentials and the electric field at one point are related by the expression

ΔV = - ∫ E. dS

Where the bold indicates vector quantities, E is the electric field and S is the line of displacement of the load, in general displacement is perpendicular to the equipotential lines, which reduces the product scales to the ordinary product.

If the potential difference is the most usual that is V = 10 V, the electric field is

s = 0.5 cm = 0.5 10⁻² m

E = ΔV / S

E = 10/0.5 10⁻²

E = 2 10³ N / C

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3 years ago