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Romashka [77]
3 years ago
9

Because they have an extended structure, elements that are _

Physics
1 answer:
katen-ka-za [31]3 years ago
8 0

Answer:

Metal, middle of the periodic table, solid.

Explanation:

Because they have an extended structure, elements that are metal tend to be in the middle of the periodic table state at room temperature as solid.

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A glass slides across a bar and slows down due to a kinetic friction of 0. 175N. If the glass weighs 0. 500N, what is the coeffi
Juli2301 [7.4K]

Answer:

F = M a = Ff     force of friction

Ff = μ M g = μ W         where M g = weight of glass

The problem gives the kinetic friction as a force (Ff) in Newtons

μ = Ff / W = .175 / .500 = .35

6 0
3 years ago
3. Categorize each statement as true or false. At the critical angle, no light is reflected and all light is transmitted.During
melamori03 [73]

Answer:

A) False

B) False

C) True

D) True

E) True

Explanation:

A) At the critical angle, no light is reflected and all light is transmitted: This statement is false because critical angle has nothing to do with whether all light is transmitted.

B) During refraction, the ray that travels through the second medium is called the incident ray: Statement is False because the ray in the second medium is called refracted ray.

C) The angle of refraction is measured from the perpendicular to the boundary between two materials: Statement is true.

D) The speed of light in a medium is always less than the speed of light in a vacuum: Statement is true because speed of light in vacuum is approximately 300,000 km/s and no other light can go higher than that.

E) The virtual image of a pencil in a glass of water is closer to the viewer than the actual pencil: Statement is true.

7 0
3 years ago
En una báscula hidráulica colocamos una persona de 75 kg sobre un émbolo y un camión de 7200 kg sobre una plataforma de 5 m de l
TEA [102]

...........................

4 0
4 years ago
Magnetic fields go from the north poles of magnets to the south poles of magnets.<br> true or false
Novay_Z [31]

The Answer is true, the saying opposites attract are true for magnets when poles match though they repel.

7 0
3 years ago
What visible wavelengths of light are strongly reflected from a 390-nm-thick soap bubble?
DiKsa [7]

Answer:

So visible wavelength which is possible here is

416 nm and 693.3 nm

Explanation:

As we know that for normal incidence of light the path difference of the reflected ray is given as

2\mu t + \frac{\lambda}{2} = \Delta x

so here we can say that for maximum intensity condition we will have

\Delta x = N\lambda

so we have

2\mu t + \frac{\lambda}{2} = N\lambda

now for visible wavelength we have

for N = 1

2\mu t = \frac{\lambda}{2}

\lambda = 4\mu t

\lambda = 4(\frac{4}{3})(390 nm)

\lambda = 2080 nm

for N = 2

\lambda = \frac{4\mu t}{3}

\lambda = \frac{4(\frac{4}{3})(390 nm)}{3}

\lambda = 693.3 nm

for N = 3

\lambda = \frac{4\mu t}{5}

\lambda = \frac{4(\frac{4}{3})(390 nm)}{5}

\lambda = 416 nm

6 0
4 years ago
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