7th GRADE SCIENCE 25 POINTS I WILL GIVE BRAINLIEST INTERNAL AND EXTERNAL STIMULI IN PLANTS PLEASE LIST 5 EXAMPLES FOR INTERNAL AND 4 EXAMPLES FOR EXTERNAL HELLP PLEASEE ignore the 1st answer for external :) ​

Explanation:

Changing the environment takes away habitats from animals and some nutrients plants need

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Answer:

kinetic energy is referred to as the energy of motion (particles are always moving).  so the answer is c).

A, C and D are soluble in water.

Solubility is defined as the maximum amount of a substance that will dissolve in a given amount of solvent at a specified temperature.

Salt (sodium chloride) is made from positive sodium ions bonded to negative chloride ions. Water can dissolve salt because the positive part of water molecules attracts the negative chloride ions and the negative part of water molecules attracts the positive sodium ions.

AgCl is also not soluble in water because the forces favouring the formation of silver hydroxide (AgOH) are too weak to break the ionic bonds between silver and chlorine in AgCl. That means a bond between silver cation and the chloride ion is strong.

Silver nitrate is highly soluble in water but is poorly soluble in most organic solvents, except acetonitrile. It readily dissolves in water due to its strong ionic properties.

Potassium nitrate ([tex]KNO_3[/tex]) crystals were insoluble in water at room temperature. Heating the solution increases the solubility of the crystals in water.

Hence, A, C and D are soluble in water.

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Answer: Covalent bonds usually occur between nonmetals.  In Covalent bond elements share their electrons.

Answer:

D:intercellular communication

Explanation:

Cellular respiration and meiosis have nothing to due with communication between cells. Intracellular communication is communication within the cell, leaving intercellular communication left as the correct answer.

Answer:

Explanation:

Option D is the correct answer

Answer:

3d

Explanation:

answer D

Answer:

PCl5

Explanation:

1 Phosphorus (P)

5 Chlorine (Cl)

P1Cl5 =

PCl5

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PCl(5)

Explanation:

P is phosphorous, chlorine is Cl

P(1atom) CL(5atoms)

We don't need to write the 1 atom for the P.

So PCl5

Make sure the 5 is the tiny lowercase.

Answer:

elements in each group have the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons.

Every element in the second column (group two) has two electrons in the outer shell.

Answer:

The new pressure is 1.06 atmospheres

Explanation:

We can calculate the new pressure from using the Combined gas law equation.

The combined gas law equation is

[tex]\frac{P_{1}V_{1} }{T_{1} } = \frac{P_{2}V_{2} }{T_{2} }[/tex]

Where [tex]P_{1}[/tex] is the initial pressure

[tex]V_{1}[/tex] is the initial volume

[tex]T_{1}[/tex] is the initial temperature

[tex]P_{2}[/tex] is the final pressure

[tex]V_{2}[/tex] is the final volume

and [tex]T_{2}[/tex] is the final temperature

From the question,

[tex]V_{1}[/tex] = 56 L

[tex]T_{1}[/tex] = 234 °C = (234 + 273.15)K = 507.15K

[tex]P_{1}[/tex] = 1.1 atm

[tex]V_{2}[/tex] = 54 L

[tex]T_{2}[/tex] = 200 °C = (200 + 273.15)K = 473.15K

Now, to determine [tex]P_{2}[/tex] (the new pressure), we will put the given values into the equation

[tex]\frac{P_{1}V_{1} }{T_{1} } = \frac{P_{2}V_{2} }{T_{2} }[/tex]

[tex]\frac{1.1 \times 56}{507.15}= \frac{P_{2} \times 54 }{473.15}[/tex]

∴ [tex]P_{2} = \frac{1.1 \times 56 \times 473.15 }{54 \times 507.15}[/tex]

Then,

[tex]P_{2} = \frac{29146.04 }{27386.1}[/tex]

[tex]P_{2} = 1.06[/tex] atm

Hence, the new pressure is 1.06 atmospheres.

Answer:

36.55 J

Explanation:

PE = Potential energy

KE = Kinetic energy

TE = Total energy

The following data were obtained from the question:

Position >> PE >>>>> KE >>>>>> TE

1 >>>>>>>> 72.26 >> 27.74 >>>> 100

2 >>>>>>>> 63.45 >> x >>>>>>>> 100

3 >>>>>>>> 58.09 >> 41.91 >>>>> 100

The kinetic energy of the pendulum at position 2 can be obtained as follow:

From the table above, at position 2,

Potential energy (PE) = 63.45 J

Kinetic energy (KE) = unknown = x

Total energy (TE) = 100 J

TE = PE + KE

100 = 63.45 + x

Collect like terms

100 – 63.45 = x

x = 36.55 J

Thus, the kinetic energy of the pendulum at position 2 is 36.55 J.

Answer:

Cell phones use radio waves to communicate with cell towers, and these waves have wavelengths of approximately 10-1000 m, which are much too large to be ionizing. WiFi actually operates at quite precise frequencies, either 2.4 GHz or 5 GHz, which correspond to wavelengths of either 12 cm or 6 cm.

Explanation:

When the mobile phone is turned on, it emits radio waves that consist of radio frequency (RF) energy—a form of electromagnetic radiation moving at the speed of light. It works by transmitting radio wave signals to (and receiving these from) nearby base stations.

Answer:

Ionic bonds form between cations and anions.

Explanation:

Electrovalent bonds (ionic bonds) form due to the electrostatic attraction between the two oppositely charged ions in the compound. A cation is formed when a metal ion loses a valence electron. Anions are formed the opposite way: a non-metal ion gains a valence electron.

Answer:

.

Explanation:

Answer:

NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)

Explanation:

Sodium hydroxide (NaOH) is a strong base and hydrochloric acid (HCl) is a strong acid. That means that they are totally dissociated into ions in aqueous solution.

When a solution of NaOH is mixed with a solution of HCl, a neutralization reaction occurs, in which a salt (NaCl) and water (H₂O) are formed.

The balanced molecular equation for this reaction is:

NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l)

Answer:

stupid

13

Explanation:

Answer:

Explanation:

Sedimentary rocks are formed from sediment grains deposited by water, wind or ice. They are always formed in layers, called “beds” or “strata”, and quite often contain fossils.

The equilibrium constant : Kc=[CO₂]

The equilibrium constant is the value of the product in the equilibrium state of the substance in the right (product) divided by the substance in the left (reactant) with the exponents of each reaction coefficient  

The equilibrium constant is based on the concentration (Kc) in a reaction  

pA + qB -----> mC + nD  

[tex]\large {\boxed {\bold {Kc ~ = ~ \frac {[C] ^ m [D] ^ n} {[A] ^ p [B] ^ q}}}}[/tex]

Solid (s) and liquid (l) are not included in the calculation of Kc(only aq-aquoeus and g-gas)

From reaction

CaCO₃(s)⇔CaO(s)+CO₂(g)

Because CaCO₃ and CaO are solid, only CO₂ is included in the calculation

[tex]\tt Kc=[CO_2][/tex]

Answer:2

Explanation:

Solid are divided into two based on arrangement of particles, one is amorphous solid and other is crystalline solids. Therefore the correct option is option 2.

Amorphous solid is a solid which is not crystalline and whose atoms are not arranged in regular pattern. particles are randomly arranged. Whereas in crystalline solids particles are arranged in a particular fashion. Example of amorphous solid is plastic, glass etc. Example of crystalline solids are all salts like sodium chloride.

Plastics are amorphous solids, and their particles are arranged in no regular pattern. These solids are different from crystalline solids, which melt at a specific temperature.

Therefore the correct option is option 2 that is amorphous, in no regular pattern, crystalline

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Answer:

Given metal is iron

Explanation:

Given data:

Heat absorbed = 790.24 J

Initial temperature = 40.0 °C

Final temperature = 72.0 °C

Mass of metal = 55.0 g

Identity of metal = ?

Solution:

Specific heat capacity:

It is the amount of heat required to raise the temperature of one gram of substance by one degree.

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = 72.0°C - 40.0°C

ΔT =  32 °C

790.24 J = 55 g ×c ×  32 °C

790.24 J = 1760 g. °C  ×c

c = 790.24 J /1760 g. °C

c = 0.449 J/g. °C

The specific heat capacity of iron is 0.449 J/g. °C thus, given metal is iron.

Answer:

d

Explanation:

edge2020

Endocrine disruptors are commonly found in pesticides, plastics, and consumer products, and industrial by-products. Thus, the correct option for this question is D, i.e. all of the above.

Endocrine disruptors may be defined as a type of extrinsic substance or mixture that significantly changes the function of the endocrine system and subsequently stimulates adverse health effects in an intact organism, its offspring, or populations.

According to the context of this question, pesticides like DDT, Atrazine, etc. plastics, and food storage materials like bisphenol A (BPA), Phthalates, Phenol, etc., and industrial by-products Polychlorinated biphenyls (PCBs) and Dioxins causes the significant and effective disruptions of the endocrine system.

Endocrine disruptors are found in numerous everyday products, including plastic bottles and containers, liners of metal food cans, detergents, flame reductions, food, and pesticides.

Therefore, endocrine disruptors are commonly found in pesticides, plastics, and consumer products, and industrial by-products. Thus, the correct option for this question is D, i.e. all of the above.

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Answer:

.

Explanation:

Did u get ur answer dear?

Answer: it calms it down and it dries and evaporates easier?

Explanation: I think that's how to explain it but I rlly dont want to get it wrong but i need points to ask a question

Answer:

your answer would be force

Explanation:

Answer:

a.

Explanation: