23 POINTS PLEASE ANSWER

Question:
Amy was observing the growth of five kinds of flowering plants on a windowsill. She noticed that some of the flowers on some of the plants turned toward the sun during the day, but the flowers on other plants did not turn toward the sun. She asked the following question.
“Why do living things sometimes change direction?”
Why is Amy’s question not a very good scientific question?

Options:
It is too broad.
It is based on her opinion.
It depends on moral judgments.
It leads to a hypothesis that can be tested.

Answer:

Precambrian

Explanation:

Answer:

An Eon

Explanation:

epcohs are the shortest geologic time frame, which make up periods, that make up eras, that make up eons.

Answer:

The goal of science is compared to engineering because engineering is there to solve problems while science is to explain natural phenomena

Explanation:

Answer:

B) Ca(H2PO4)2

Explanation:

To solve this we must be knowing each and every concept related to chemical formula.  Therefore, the correct option is option B among all the given options.

The chemical formula is indeed a means of expressing information about just the chemical proportion of atoms that comprise a certain chemical compound as well as molecule through the use of chemical element numbers and symbols.

Furthermore, the molecular formula does not contain any words and does not serve as a chemical name. However, it just indicates basic chemical structures and is not the same as the entire chemical structural formula.  The correct formula for calcium dihydrogen phosphate is Ca(H[tex]_2[/tex]PO[tex]_4[/tex])[tex]_2[/tex].

Therefore, the correct option is option B among all the given options.

To know more about  chemical formula, here:

https://brainly.com/question/29031056

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Answer:

A joule divided a second

Explanation:

i took the test

plz give me brainlist :)

Answer:

A. Ba

C. Cu

D. H

Explanation:

HOPE THIS HELPS

Answer:

0J

Explanation:

Work = Force * Distance

Since the distance (or the displacement) in this problem is 0, hence, no work is done. W = 150*0 = 0. The mass of the object is just trying to trick you. Hopes this helps!

Answer:

Explanation:

It describes how much heat must be added to a unit of mass of a given substance to raise its temperature by one degree Celsius. ... The mass m, specific heat c, change in temperature ΔT, and heat added (or subtracted) Q are related by the equation: Q=mcΔT.

Answer:

The formula q=mcΔt explained below

Explanation:

so q represents the amount of heat energy. M is the mass of the object and c is the temperature of the object. Δt also known as delta is the change in temperature. It would be the final temperature minus the original temperature.

Answer:

The answer is

Explanation:

To find the number of entities of a substance given it's number of moles we use the formula

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question

n = 2.0 moles

We have

N = 2 × 6.02 × 10²³

We have the final answer as

Hope this helps you

Number of moles of boron (B) = 2

We have to find number of atoms present in the given amount of boron[tex].[/tex]

➤ We know that 1 mole of substance contains 6.022×10²³ particles (atoms/molecules).

★ Number of atoms present in B :

⭆ N = n × [tex]\sf{N_A}[/tex]

⭆ N = 2 × 6.022 × 10²³

⭆ N = 12.044 × 10²³

⭆ N = 1.2 × 10²⁴

Answer:

The final step of the scientific method is to communicate the results​

Answer:

I believe it is 2?

Explanation:

;v;

Answer:

B. Divergent

The rift formed in the Divegent tectonic boundary between the North America and Eurasian Plates and is located now in Iceland (Im sorry im not good at explaining)

Answer:

A B C D E

Explanation:

Answer:

1.cation

2.anion

Explanation:

the plus is always cation and the negative is anion

Answer:

1. cation

2. anion

Explanation:

A positive ion is always cation and the negative ion is anion

Answer:

C. I

Explanation:

The elements are categorized in groups and periods. The periods are horizontal and the groups are vertical. The elements in the same group (vertical) have very similar characteristics.

Answer:

Detail is given below.

Explanation:

Atomic radius  trend along period:

As we move from left to right across the periodic table the number of valance electrons increases. The atomic size tend to decrease in same period of periodic table because the electrons are added with in the same shell. When the electron are added, at the same time protons are also added in the nucleus. The positive charge is going to increase and this charge is greater in effect than the charge of electrons. This effect lead to the greater nuclear attraction. The electrons are pull towards the nucleus and valance shell get closer to the nucleus. As a result of this greater nuclear attraction atomic radius decreases and ionization energy increases because it is very difficult to remove the electron from atom and more energy is required.

we can see in picture A there is one positive charge and force of attraction is 2.30×10⁻⁸ N

In picture D there are 2 positive charge and force of attraction is 4.60×10⁻⁸ N

So by increasing the positive charge force of attraction also increases.

In F we can see there is more positive charge thus force of attraction is also greater.

Answer:

No longer emitting heat or light, the white dwarf will become a black dwarf. Because it emits no radiation, it is nearly impossible to see. However, the black dwarf would still retain its mass, allowing scientists to detect the effects produced by its gravitational field.

Explanation:

Answer:

white dwarfs are hot, black dwarfs are cold

Explanation:

a white dwarf is a slowly burning and aging corpse of a main sequence star such as our sun. they are up to 40 times hotter then the sun, ranking among one of the hottest objects in the universe, except their luminosity is so low that all their heat stays in them basically forever.

On the other hand, a black dwarf is a theoretical ending to a white dwarf, over the course of trillions of years, white dwarfs cool down into black dwarfs. black dwarfs rank among the coldest possible temperature. We aren't sure if these are really a thing, because we still haven't given white dwarfs enough time to cool down.

Answer: temperature liquefaction

Explanation: At the exact time the only used method or strategy the division of helium from natural gas is low temperature liquefaction

Answer:

kingdom, phylum, class, order, family, genus and species.

Explanation:

Not sure what you exactly mean, but I think what you are talking about are the spheres of earth (Lithosphere, Hydrosphere, Atmosphere, and Biosphere.)

Lithosphere (Terrestrial) is the land on earth. Hydrosphere (Hydrologic) is the water on earth.

I'm not sure if this is 100% correct but I'm guessing this is what you are referring to. It could be different across different science classes.

Answer:

D

Explanation:

Move the decimal and count the places

Answer:

1-There Must be some displacement in the direction of force.                                                  2-Angle between force and displacement is 0°.                                                                            

Answer:

false false false false

Explanation:

Electronic configuration of Nitrogen -

₇N = 1s² 2s² 2p³

Answer:

730 mL which is .73 L

Explanation:

Answer:

There are 6.023 x 10^23 fluorine atoms.

Explanation: