Hello everyone! I have a question about science;
In a video game, a flying coconut moves at a constant velocity of 20 meters/second in a positive direction. The coconut hits an obstacle and moves in the opposite direction with a constant velocity of 10 meters/second. What’s the change in velocity of the coconut?

A.
-30 m/s
B.
-10 m/s
C.
10 m/s
D.
30 m/s

Answer:

V = 2.75 L

Explanation:

Given that,

Mass of liquid glycerol, m = 3470 g

The density of liquid glycerol, d = 1.26 g/cm³

We need to find the volume of liquid glycerol.

We know that,

Density=mass/volume

[tex]V=\dfrac{m}{d}\\\\V=\dfrac{3470\ g}{1.26\ g/cm^3}\\\\V=2753.96\ cm^3[/tex]

We know that, 1 cm³ = 0.001 L

V = 2.75 L

So, the volume of liquid glycerol is 2.75 L.

Answer:

F=ma

=(0.3kg) (50m/s/s)

F =15 kg per m/s/s

Answer: 3. No displacement, zinc is most reactive.

4. Calcium Chloride, Calcium is most reactive.

5. No displacement, Copper is most reactive

6. No displacement, Calcium is most reactive

7. Hydrogen Oxide, Hydrogen is most reactive

8. Carbon oxide, Carbon is most reactive

9. No displacement, Aluminum is most reactive

10. Potassium Kryptide + Lead, no displacement, Potassium is most reactive.

Answer:

Nitrogen group element, any of the chemical elements that constitute Group 15 (Va) of the periodic table. The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), bismuth (Bi), and moscovium (Mc)

Explanation:

Answer:

A siege engine is a device that is designed to break or circumvent heavy castle doors, thick city walls and other fortifications in siege warfare. Some are immobile, constructed in place to attack enemy fortifications from a distance, while others have wheels to enable advancing up to the enemy fortification.

Explanation:

Answer:

chlorine and potassium

Explanation:

Answer:

Chlorine and potassium

Answer:

2 A): Fluorine

B): more protons, more force attraction less atomic radius

3A): Helium

B):it has small atomic radius

4 th question is not visible.....

Answer:

Because 60 percent of our body weight is made up of water. Our bodies use water in all the cells, organs, and tissues, to help regulate body temperature and maintain other bodily functions.

Explanation:

Our bodies is made out of 60% water and even if the percentage goes down 1% we could faint. 5% and we could die. We wash off with water to clean ourselves. We use water to cook like boiling pasta. Water is a necessity not just humans need it but plants need it to grow and germinate. Hope this helps sorry it took so long. I had a fight with autocorrect.

Answer:

the answer is

a

b

d

c

Explanation:

hopeit help

The correct matches will be:

                     [tex][Cl]=1s^22s^22p^63s^23p^5[/tex]

                     [tex][Ne]=1s^22s^22p^6[/tex]

                       [tex][P]=1s^22s^22p^63s^23p^3[/tex]

                        [tex][S]=1s^22s^22p^63s^23p^4[/tex]

So, from this, we can conclude that the correct matches will be:

Learn more about the valence electrons here:

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brainly.com/question/4954103?referrer=searchResults

Answer: The number of formula units present in 2 moles of [tex]C_6H_{12}O_6[/tex] are [tex]1.2044\times 10^{24}[/tex]

Explanation:

Formula units are defined as the number of molecules or atoms present in 1 mole of a compound or element respectively.

According to mole concept:

1 mole of a compound contains [tex]6.022\times 10^{23}[/tex] number of formula units

Here, 2 represents the number of moles of [tex]C_6H_{12}O_6[/tex]

We are given:

Moles of [tex]C_6H_{12}O_6[/tex] (glucose) = 2 moles

Number of formula units of [tex]C_6H_{12}O_6=(2\times 6.022\times 10^{23})=1.2044\times 10^{24}[/tex]

Hence, the number of formula units present in 2 moles of [tex]C_6H_{12}O_6[/tex] are [tex]1.2044\times 10^{24}[/tex]

Answer:

20 g of MgSO₄.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

Mg + H₂SO₄ —> MgSO₄ + H₂

Next, we shall determine the mass of Mg that reacted and the mass of MgSO₄ produced from the balanced equation. This is illustrated below:

Molar mass of Mg = 24 g/mol

Mass of Mg from the balanced equation = 1 × 24 = 24 g

Molar mass of MgSO₄ = 24 + 32 + (16×4)

= 24 + 32 + 64

= 120 g/mol

Mass of MgSO₄ from the balanced equation = 1 × 120 = 120 g

SUMMARY:

From the balanced equation above,

24 g of Mg reacted to produce 120 g of MgSO₄.

Finally, we shall determine the mass of MgSO₄ produced by the reaction of 4 g of Mg. This can be obtained as follow:

From the balanced equation above,

24 g of Mg reacted to produce 120 g of MgSO₄.

Therefore, 4 g of Mg will react to produce = (4 × 120)/24 = 20 g of MgSO₄.

Thus, 20 g of MgSO₄ is obtained from the reaction.

Answer:

Decrease the temperature

Explanation:

If you increase the temperature the vapor pressure will increase. Adding more liquid to the container is completely irrelevant.

Decreasing the temperature would reduce the vapor pressure of a sealed container of liquid. Therefore, option (C) is correct.

Vapour pressure is the pressure that the vapour phase puts on the liquid phase when the two phases are in balance. At higher temperatures, the molecules of the liquid have more energy and are more likely to move into the vapour phase. This makes the vapour pressure go up.

But when the temperature goes down, the average energy of the molecules in the liquid goes down, which slows the rate of evaporation. This means that fewer molecules are moving from the liquid phase to the vapour phase. As a result, the vapour pressure is lower.

Putting more liquid in the bottle wouldn't change the vapour pressure directly. The temperature and the type of liquid, not the amount, are what decide the vapor pressure.

Learn more about Vapor Pressure, here:

https://brainly.com/question/29640321

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Answer:

334.2× 10²³ molecules

Explanation:

Given data:

Mass of water = 1 Kg ( 1000 g )

Number of molecules = ?

Solution:

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 1000 g/ 18 g/mol

Number of moles = 55.5 mol

1 mole contain 6.022× 10²³ molecules

55.5 mol×6.022× 10²³ molecules

334.2× 10²³ molecules

Answer:

Its changes over time.

Explanation:

I think because each ocean current has a different temperature.

Answer:

Thermohaline circulation. This is a process driven by density differences in water due to temperature (thermo) and salinity variations in different parts of the ocean. Currents driven by thermohaline circulation occur at both deep and shallow ocean levels and move much slower than tidal or surface currents.

Answer:

I think the last one

Explanation:

The reason for that is because when you go up to present something you always want to try to hav believability and confidence.

Answer:

believability and confidence

Explanation:

Answer: F. both c and d

Explanation:

homogeneous mixture is of same kind/phase. so the most appropriate answer we can take is smoothie and white bread dough :)

Answer:

radioactive

nonmetal

hydrogen

liquid

rarely (since they have a full valence electron shell)

inner transition

Answer:

The solubility curve helps us to predict which substance will crystallize out first from a solution containing two or more solutes.

The solubility curve helps us to compare the solubilities of different substances at the same temperature.

Solubility curve can be used to determine the amount of substance deposited when the solution is cooled.

It brings the change in the solute composition substance.

Answer:

1, we can know the solubility curve of substances.

2, we can compare the solubility curve of two or more substances in same temperature.

3, we can know the amount of solute and solvent which is used that solubility.

4, we can know that solubility of substances changes with temperature.

Answer:

Explanation:

Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).

Answer:

Subatomic particles

Explanation:

I hope it helped

Answer:

Yes

Explanation:

Remember, Newton's third law of motion; which says in part that "Every action has an equal and opposite reaction."

Hence, in this case, the fact that the doorbell rang out implies that there was another force that was exerted on it; which is, John's finger pressing the doorbell.

In other words, when John uses his fingers to press the doorbell button he applies a force (a mechanical force), and that force results in an opposite reaction; the ringing of the doorbell.

Answer:

B.

Explanation:

Answer:  p = m/Vp = 39.5 g/5.0 cm3p = 7.9 g/cm3 4.

Photosynthesis is a chemical change as:

A. New substances are formed with properties that are different from the original substances.

A chemical change happens when one chemical substance is transformed into one or more different substances. A chemical change is different from a physical change, which doesn't rearrange atoms or molecules and produce a completely new substance.

Thus, correct option is A which proves that photosynthesis is a chemical change.

Find more information about Chemical change here: brainly.com/question/453535

Explanation:

To calculate the number of atoms in a sample, divide its weight in grams by the amu atomic mass from the periodic table, then multiply the result by Avogadro's number: 6.02 x 10^23.