What is magnet made of

Consider the third period of the periodic table. Which element has the smallest atomic radius?

Anettt [7]

According to periodic trends in the periodic table, the atomic radius decreases from left to right.

In period three, the element with the smallest atomic radius would be the element in the rightmost area. Protons increase as it goes to the right, which would mean they pull in electrons closer which decreases the size.

So in period 3, the element with the smallest atomic radius is Argon (Ar).

3 0

4 years ago

What is the specific latent heat of fusion of water?

slava [35]

Answer:

334

Explanation:

7 0

3 years ago

Se debe usar una rampa de 5 m para elevar muebles que pesen 490 N hasta una plataforma a una altura de 2 m. Su propuesta de que

AfilCa [17]

Answer:

F = 180 N

Explanation:

To find the required force you first calculate the angle of the ramp, by using the following relation:

$sin\theta=\frac{2m}{5m}=0.4\\\\\theta=sin^{-1}(0.4)=23.57\°$

Next, you use the Newton second law to know what is the x component (in a rotated coordinate system) of the gravitational force:

$F_x=mgsin\theta$

the required force must be, at least, the last force Fx. You know that the weight of the object is 490N = mg. Hence, you have:

$F=F_x=(450N)sin(23.57\°)=180N$

the required force is 180N

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TRANSLATION:

Para encontrar la fuerza requerida, primero calcule el ángulo de la rampa, utilizando la siguiente relación:

Luego, usa la segunda ley de Newton para saber cuál es el componente x (en un sistema de coordenadas girado) de la fuerza gravitacional:

la fuerza requerida debe ser, al menos, la última fuerza Fx. Sabes que el peso del objeto es 490N = mg. Por lo tanto, tienes:

3 0

3 years ago

Why polarized sunglasses particularly effective in reducing glare?

kipiarov [429]

Answer:

Polarized glasses contains a special filter that block dangerous intensity of lights which are reflected by flat surfaces and they help in reducing glare and discomfort

Explanation:

Sunlight scatters in all the direction. But when this light strikes with the flat surfaces, then the light which is reflected by the flat surface tend to become polarized, means the reflected light will travel in all directions. This reflecting light creates a dangerous intense light that causes glare and reduces visibility.

Polarized glasses contains a special filter that block this type of dangerous intensity lights, help in reducing glare and discomfort.

Therefore, by the above discussion it can be say that the polarized sunglasses particularly effective in reducing glares.

8 0

3 years ago

Daughter element the new element produced along with a decay particle in a nuclear transmutation 2. half-life the substance that

valentinak56 [21]

Answer:

1. Daughter element : the new element produced along with a decay particle in a nuclear transmutation

2. half life: the time required for the decay of one-half of the atoms in a sample of radioactive material

3. parent element : the substance that decays in a nuclear transmutation

4. transmutation : the change of one chemical element into another by nuclear decay or radioactive bombardment

Explanation: Radioactive decay process is a type of process in which a less stable nuclei also called as parent element decomposes to a stable nuclei or a daughter element by releasing some radiations or particles like alpha, beta particles or gamma-radiations and the process by which one element changes to another element is called as transmutation.

$_A^Z\textrm{X}\rightarrow _{A-2}^{Z-4}+_2^4\alpha$

Half life is the time taken by an element to decay to half of its initial value.

4 0

4 years ago