can you help me please​

Answer:The atom being mostly empty space. A small number of alpha particles were deflected by large angles (> 4°) as they passed through the foil. There is a concentration of positive charge in the atom. Like charges repel, so the positive alpha particles were being repelled by positive charge

Answer:

OH

Explanation:

Hydroxide is a diatomic anion with chemical formula OH⁻.

Answer:

Volume of box =  125 cm³

Explanation:

Given:

Length l = 10 cm

Width b = 5 cm

Height h = 2.5 cm

Find:

Volume of box

Computation:

Volume of box = lbh

Volume of box = 10 x 5 x 2.5

Volume of box =  125 cm³

Answer:

not sure

Explanation:

Answer:

Explanation:

Slow but able to move past one another

Answer:

Chlorine's (Cl) atomic mass if 17.

Explanation:

"Chlorine (atomic number 17) is a yellowish-green toxic gas. About three quarters of all chlorine atoms have 18 neutrons, giving those atoms a mass number of 35. About one quarter of all chlorine atoms have 20 neutrons, giving those atoms a mass number of 37."

Answer:

D!

Explanation:

When solving by using the Quadratic Formula, The steps to follow are to find values for a, b, c, substitute them into the formula, and simplify. The correct option is d.

A quadratic equation is a mathematical equation that shows the equation in an arranged form in which the unknown variables are x and known variables are a, b, and c. Where a is not equal to 0.

The standard quadratic equation

ax² + bx + c = 0

To solve the quadratic equation, first, find the variable value, and substitute the value of a, b, and c. Simplify it and ans solve it and then get the solution. There is another thing in the quadratic equation, which is factorization.

Thus, the correct option is d. find values for a, b, c, substitute them into the formula, and simplify.

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Answer:

1/4

Explanation:

force/mass

5/20=1/4 abs

Answer:

Law of cross-cutting relationships

Explanation:

This interpretation is based on the law of cross - cutting relationships.

This law states that "faults and fractures that cuts through a rock are younger than the rocks they cut through".

Answer:

75 g

Explanation:

[tex]m_1[/tex] = Initial mass of water = 90 g

c = Specific heat of water

[tex]\Delta T_1[/tex] = Initial temperature difference = [tex](37.08-22.08)^{\circ}\text{C}[/tex]

[tex]m_1[/tex] = Mass of water to be added

[tex]\Delta T_2[/tex] = Final temperature difference = [tex](37.08-55.08)^{\circ}\text{C}[/tex]

Since, heat energy in the system is conserved we know

[tex]m_1c\Delta T_1+m_2c\Delta T_2=0\\\Rightarrow m_1c\Delta T_1=-m_2c\Delta T_2\\\Rightarrow m_2=-\dfrac{m_1\Delta T_1}{\Delta T_2}\\\Rightarrow m_2=-\dfrac{90(37.08-22.08)}{37.08-55.08}\\\Rightarrow m_2=75\ \text{g}[/tex]

The mass of water to be added to reach the desired temperature is 75 g.

Answer:

HF is the acid

Explanation:

The Brønsted-Lowry theory defines the acids and bases in chemistry as follows:

An acid is the species that can donate a proton

A base can accept protons.

In the reaction:

HF(aq) + NH₃(aq) → NH₄⁺(aq) + F⁻(aq)

As you can see, HF can donate its proton to produce F⁻: HF is the acid

In the same way, NH₃ is accepting a proton, NH₃ is the base.

Answer:

Neutrons have no charge.

Explanation:

Remember it this way Neutral (neither of any side, in this case, + or +) and Neutron both have N. so Neutron is Neutral

Answer:

use v=IR

Explanation:

so, 160=I*5

I = 160/5

=32 ampere

The current = 32 A

Electric current is a ratio between the voltage and the amount of resistance at the conductor.  

Can be formulated  

[tex]\large{\boxed{\bold{I=\frac{V}{R}}}[/tex]

V = Voltage (volts)  

R = resistance (ohms)  

This formula is also known as Ohm's Law, which states that  

the amount of current flowing is directly proportional to the voltage and inversely proportional to the resistance.  

V=160 V

R=5Ω

[tex]\tt I=\dfrac{160}{5}=32~A[/tex]

Answer: As trash, Synthetic Polymers are not biodegradable. Landfills can easily fill up with synthetic polymers. Plastics can be made into different products. Recycling synthetic polymers is costly.

Explanation: Hope this helps in any way possible!

The main issues of using synthetic polymers include toxicity poor biocompatibility etc. Synthetic polymers stay non-degradable for ling time and make the surface polluted.

Natural polymers are naturally made substances such as cellulose, starch, glycogen etc. Polymers made by man are called synthetic polymers. Synthetic polymers are diverse and are made through several polymerization techniques.

PVC, polyethylene, polyesters Teflon etc. are very common polymers in daily life. A major class of synthetic polymers include plastics which are major  pollutants nowadays.

Most of the synthetic polymers are non-biodegradable and will cause landfill issues. Some them are toxic in nature and might cause several health issues. Blending them with biodegradable  polymers is a solution for this.

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Answer:

3 M

Explanation:

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

H2SO4 + 2NaOH —> Na2SO4 + 2H2O

From the balanced equation above, the following data were obtained:

Mole ratio of the acid, H2SO4 (nA) = 1

Mole ratio of the base, NaOH (nB) = 2

Next, the data obtained from the question. This include the following:

Volume of acid, H2SO4 (Va) = 500 mL

Molarity of acid, H2SO4 (Ma) = 6 M

Volume of base, NaOH (Vb) = 2 L

Molarity of base, NaOH (Mb) =?

Next, we shall convert 2 L to millilitres (mL). This can be obtained as follow:

1 L = 1000 mL

Therefore,

2 L = 2 L × 1000 mL /1 L

2 L = 2000 mL

Thus, 2 L is equivalent to 2000 mL.

Finally, we shall determine the molarity of the base, NaOH. This can be obtained as follow:

Volume of acid, H2SO4 (Va) = 500 mL

Molarity of acid, H2SO4 (Ma) = 6 M

Volume of base, NaOH (Vb) = 2000 mL

Mole ratio of the acid, H2SO4 (nA) = 1

Mole ratio of the base, NaOH (nB) = 2

Molarity of base, NaOH (Mb) =?

MaVa / M Vb = nA/nB

6 × 500 / Mb × 2000 = 1/2

3000 / Mb × 2000 = 1/2

Cross multiply

Mb × 2000 × 1 = 3000 × 2

Mb × 2000 = 6000

Divide both side by 2000

Mb = 6000 /2000

Mb = 3 M

Thus, the molarity of the base, NaOH is 3 M.

Answer:

hope it helps...

Explanation:

Along the third type of plate boundary, two plates move laterally and pass each other along giant fractures in Earth's crust. Transform faults are so named because they are linked to other types of plate boundaries. The majority of transform faults link the offset segments of oceanic ridges.

Answer:

HF - hydrogen bonding

CBr4 - Dispersion

NF3 - Dipole-dipole

Explanation:

Hydrogen bonding occurs when hydrogen is covalently bonded to a highly electronegative atom such as fluorine, chlorine nitrogen, oxygen etc. Hence the dominant intermolecular force in HF is hydrogen bonding.

CBr4 is nonpolar because the molecule is tetrahedral and the individual C-Br dipole moments cancel out leaving the molecule with a zero dipole moment hence the dominant intermolecular force are the dispersion forces.

NF3 has a resultant dipole moment hence the molecules are held together by dipole-dipole interaction.

The predominant intermolecular force in the liquid state of the compounds are as follows:

Discussion:

In essence, the dominant intermolecular force in HF is hydrogen bonding.

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A is the correct answer

Answer:

The correct option is C.

The respiratory and digestive systems work together

to make usable ATP energy for cells.

Explanation:

DIGESTIVE SYSTEM is the System the body that help to breakdown compound molecules into smaller pieces that can easily by absorbed by the body hence release nutrients and ATP. Energy are stored as glucose and resuable as ATP.

RESPIRATION is a process whereby oxygen is inhaled and it help to breakdown large compounds to release energy (ATP) and carbon dioxide is released. Both system work together to release ATP for cells.

Therefore , The respiratory and digestive systems work together

to make usable ATP energy for cells. Is the correct option.

Answer:

0.0024

Explanation:

you dont count the zeros as significant factors then round up 3 to 4 because you always round up if its 5 dont worry about the other numbers you dont need them hope it helped

Answer:

copper wire!

Explanation:

Each copper atom has lost one electron and become a positive ion. ... The electrons can move freely through the metal. For this reason, they are known as free electrons. They are also known as conduction electrons, because they help copper to be a good conductor of heat and electricity. Copper, Silver, Aluminum, Gold, Steel and Brass are common conductors of electricity. When properly installed, it is the safest and most efficient metal to produce electricity. Copper is commonly used as an effective conductor in household appliances and in electrical equipment in general. Because of its low cost, most wires are copper-plated. For a material to be a good conductor, the electricity passed through it must be able to move the electrons; the more free electrons in a metal, the greater its conductivity.

Answer:

the answer is  c.

Explanation:

The number of moles of sodium chloride present in 0.5 L of 4 Molar NaCl(aq) is  2 moles. The correct option is a.

Moles are the quantity or amount of any substance. It is a measurement quantity.

The concentration of NaCl is 4 molar

The volume of the solution is 0.5 L is given.

To calculate the number of moles, we use the formula of molarity, in which moles are divided by the volume of the given solution. The formula is:

Molarity = moles/ volume

4 M = moles / 0.5 L

Putting the values in the given formula:

Moles = 4 x 0.5 L = 2 moles

Thus, the correct option is a. 2 moles is the number of moles of sodium chloride.

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Answer:

gene

Explanation:

DNA is divided into functional units called genes. A gene is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis

Answer:

coding for protein are called exons, and the noncoding regions separating the exons are called introns. Following transcription, these coding sequences must be joined together before the mRNAs can function. The process of removal of the introns and subsequent rejoining of the exons is called RNA splicing.

Explanation:

Answer:

I notice that it's extremely hot after it has been sitting in thr sun for a while. The sun's rays have been directly shining on the car because the car was in the sun's Ray's directly. If the car's windows were to be left open, it would be less hot but still be hot if the rays of the sun were directly on the car.

Answer:

0.39760273

Explanation:

I typed into calculator hope it's right.

Answer:

The answer is B

Explanation:

I took the test. PS... if your taking this test in college you should know it. I'm taking this test in middle school and got a 100%

Exercising is an essential part of the body's daily rouging and hence its necessary to keep the position of the body straight when standing and spotting the exercises.

Hence the option C is correct.

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Answer: 1.5 m

Explanation: E=mgh=Fh

30 J = 20 N * h

h = 30/20 = 1.5 m

Answer:

1.5 m

Explanation:

it just is its easy made A on test

Answer:

The definition has been defined throughout the clarification segment below, as per the provided case.

Explanation:

Polypeptides were essential amino acids although therefore realize that those acids become charged individually, provide various R groups but have specific isoelectric positions as well.

The polypeptides could be divided by analysis of multiple isoelectric points including fulfilling the following, even though a protein always at the isoelectric point seems to have the end up losing money.

Answer:

FREEZING RAIN

Explanation:

Answer:

C. freezing rain hope it helps :)

Explanation: