CHEMISTRY MIDDLE SCHOOL

In any electromagnetic wave, A) both the energy and the wave travel in the same direction. B) only the oscillating electric field component carries energy with it. C) half the energy is carried by the electric field and half is carried by the magnetic field. D) there is a third component, other than the electric and magnetic fields, that carries energy.

Answers

Answer 1
Answer: I believe the answer is letter c. haf energy is carried by the electric field hand half is carried by a magnetic field. the movements are in travelling in a perpendicular movement, a kind of x and y axis that creates oscillation producing electric fields. The effect can make magnet out of electricity.
Answer 2
Answer:

Answer:

C) half the energy is carried by the electric field and half is carried by the magnetic field.

Explanation:

In any electromagnetic wave, half the energy is carried by the electric field and half is carried by the magnetic field . Electromagnetic waves are self-propagating transverse oscillating waves of electric and magnetic fields.

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The moon never changes. But the moon looks different throughout the month because of the way the starlight hits it.a. true
b. false

Answers

The way the moon looks is about how the sun hits it and how the earth is positioned 

so therfore  B. False

Humans have developed different cat breeds using the process of selective breeding. How is selective breeding different than evolution by natural selection?

A.
Selective breeding is driven by the environment, but natural selection is driven by humans.

B.
Selective breeding is driven by humans, while natural selection is driven by the environment.

C.
Selective breeding selects for favorable traits, but natural selection does not.

D.
Natural selection selects for favorable traits, but selective breeding does not.

Answers

"B. Selective breeding is driven by humans, while natural selection is driven by the environment" is true. Favorable traits are selected in both cases, but for different reasons.
Humans have developed different cat breeds using the process of selective breeding? B. Selective breeding is driven by humans, while natural selection is driven by the environment.
Hope I helped, and good luck!

Which atom has the largest atomic radius?(1) potassium (3) francium
(2) rubidium (4) cesium

Answers

Answer is: 3) francium.

The atomic radius of a chemical element is a measure of the size of its atom.

The atomic radius varies with increasing atomic number, but usually increases because of increasing of number of electrons.

Potassium (K), rubidium (Rb), ceasium (Cs) and francium (Fr) are in group 1 (the alkali metals) of the periodic tabl.

The atomic radius increases down the group of Periodic table and francium is on the bottom of the group 1 with highest atomic number.

Final answer:

The atom with the largest atomic radius among potassium, rubidium, cesium, and francium is francium, due to it being furthest down the group of alkali metals.

Explanation:

The atomic radius increases as we move down a group on the periodic table. This is because the number of energy levels increases, which causes the electron cloud to expand. Hence, in this case, the largest atomic radius would belong to francium, as it is the furthest down the group of alkali metals (which includes potassium, rubidium, and cesium).

Learn more about Atomic Radius here:

brainly.com/question/32036952

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The landscape feature that forms when plate movement forces the crust to bend downward is a.......

Answers

It is called a syncline.
I think it's a syncline

Which reaction is single replacement?(1) 2H2O2 --> 2H2O + O2

(2) 2H2 + O2 --> 2H2O

(3) H2SO4 + Mg --> H2 + MgSO4

(4) HCl + KOH --> KCl + H2O

Answers

Among the given choices, the third option is the only one which illustrates single replacement. (3)H2SO4 + Mg --> H2 + MgSO4 A single replacement is also termed as single-displacement reaction, a reaction by which an element in a compound, displaces another element. It can be illustrated this way: X + Y-Z → X-Z + Y
In a single replacement reaction (or simple displacement) an element reacts with a compound and takes the place of another element in that compound. The reaction that shows a sigle replacement is the third one. Where H2SO4 and Mg turn into H2 + MgSO4. In this case Mg replaces H2

A pitcher accelerates a baseball with a mass of 1.5 kg at 6m/s2. How much force does this take?

Answers

F=m x a
F=force.
m=mass
a=acceleration

Data:
m=1.5 Kg
a=6 m/s²

F=1.5 kg x 6 m/s²=9 Newtons.

answer: the force will be 9 Newtons. 
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