Matter is anything that has mass and takes up…

If we measure the temperature of a blackbody to be about 300 K (a typical air temperature in Florida), at what wavelength would

Nostrana [21]

Answer:

9.66 x 10^-6 m

Explanation:

Use the Wein's displacement law

$\lambda _{m}\times T = b$

Where, b is the Wein's constant

b = 2.898 x 10^-3 meter-kelvin

So, λm x 300 = 2.898 x 10^-3

λm = 9.66 x 10^-6 m

3 0

4 years ago

Which type of material uses the subtractive coloring process?

Triss [41]

I think that the answer is A

6 0

3 years ago

15. The above figure shows the path of a ray of light falling on the mirror(s) represented by a box. Which of the following arra

lana [24]

Answer: A

Explanation:

From the figure given as attachments, the error pointing upward signifies the incident ray while the one point downwards signifies the reflected ray.

One of the laws of reflection is stated that the angle of incidence is equal to the angle of reflection.

Since the two arrows are parallel to each other, then the mirror must be perpendicular to the two arrows. That is, the incident ray and the reflected ray must be perpendicular to the mirror.

Option A is the correct answer.

5 0

3 years ago

The periodic table is an arrangment of the chemical elements, ordered by atomic number, into families, and by doing so illustrat

olya-2409 [2.1K]

Answer:

Option B) reactive to nonreactive

Explanation:

A) Solid to gas

This might apply, because most of the gases are to the right portion of the periodic table

There are just a few elements that are gases at room temperature; a total of 11: six noble gases (group 18), two halogens (group 17), oxygen (group 16), nitrogen (group 15), and hydrogen (group 1).

Hydrogen is an exception to this trend because they are in the left part of the periodic table.

B) Reactive to nonreactive

The most reactive metals are in group 1 (alkali metals) and the most reactive nonmentals are in the group 18 (halogens). Hence, it is false that the from left to right the preperties go from reactive to nonreactive.

Hence, this is the one that cannot apply.

C) Metal to metalloid to nonmetal

It is true that the metallic character of the elements decreases from left to right; the metals are to the left, going to the right you find some metalloids, and further to the right you find the nonmetals.

Hence, this trend is correct.

D) Increasing number of outer-shell electrons

The number of outer-shell electrons definetly increase from left to right.

The number of electrons in neutral atoms equals the number of protons (to balance the positive and negative charges). Since, the atomic number (the number of protons) increase from left to right, the number of electrons also increase.

In a period (a row of the periodic table) the electrons add to the same outer-shell, then you will find that the number of electrons of the outer-shell increase from left to right. Hence, this is also a correct trend.

In conclusion, the only trend that does not apply is the described by the option B).

4 0

3 years ago

Read 2 more answers

Two metals are used to make batteries. Would a battery in which both metals components are copper, make a good battery? Explain

alexdok [17]

I think that the answer is yes. Because copper is a cunductor of DC and AC. However electritions are trying to avoid copper wiring because its a poor conductor.

So I guess you could goth ways but I say yes it could work.

4 0

3 years ago