The force of a hammer drives a nail into wood. This is an example of? A. An unbalanced force. B. Gravitational force. C. Friction. D. Balanced forces.

Answers

Answer 1

Answer:

The answer is A. an unbalanced force

Explanation:

This is because the force from the hammer on the nail causes a force that unbalanced  normal forces on the nail.


Related Questions


If 1.76 g of an ideal gas occupy 1.0 L at standard temperature and pressure (STP), what is the molar mass of the gas?

Answers

Answer:

Explanation:

Whenever you see molar masses in gas law questions, more often than not density will be involved. This question is no different. To solve this, however, we will first need to play with the combined ideal gas equation PV=nRT to make it work for density and molar mass. The derivation is simple but for the sake of time and space, I will skip it. Hence, just take my word for it that you will end up with the equation:M=dRTPM = molar mass (g/mol)d = density (g/L)R = Ideal Gas Constant (≈0.0821atm⋅Lmol⋅K) T = Temperature (In Kelvin) P = Pressure (atm)As an aside, note that because calculations with this equation involve molar mass, this is the only variation of the ideal gas law in which the identity of the gas plays a role in your calculations. Just something to take note of. Back to the problem: Now, looking back at what we're given, we will need to make some unit conversions to ensure everything matches the dimensions required by the equation:T=35oC+273.15= 308.15 KV=300mL⋅1000mL1L= 0.300 LP=789mmHg⋅1atm760mmHg= 1.038 atmSo, we have almost everything we need to simply plug into the equation. The last thing we need is density. How do we find density? Notice we're given the mass of the sample (0.622 g). All we need to do is divide this by volume, and we have density:d=0.622g0.300L= 2.073 g/LNow, we can plug in everything. When you punch the numbers into your calculator, however, make sure you use the stored values you got from the actual conversions, and not the rounded ones. This will help you ensure accuracy.M=dRTP=(2.073)(0.0821)(308.15)1.038= 51 g/molRounded to 2 significant figuresNow if you were asked to identify which element this is based on your calculation, your best bet would probably be Vandium (molar mass 50.94 g/mol). Hope that helped :) 

How many R.P.'s is equivalent to 0.780 g of Na₂CO₂?

Answers

Answer:

pbo2+cl-=clo-+pb(oh)2

Explanation:

balance by ion electron

one revolution of the moon around earth takes_______ days.

Answers

Answer:It’s important to know WHY. Great explanations are what makes Brainly awesomeExplain everything. Imagine that the person who was asking, knows nothing at all so you need to start from the very beginningAlways include the steps and/or background required to get to the final answer. Let’s help other people understand and solve future problems on their ownShow all the calculation if it is a numerical question.

Explanation:

A 0.205 g sample of CaCO3 (Mr = 100.1 g/mol) is added to a flask along with 7.50 mL of 2.00 M HCl. CaCO3(aq) + 2HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g)Enough water is then added to make a 125.0 mL solution.

Answers

The volume of the NaOH used is calculated as 14 mL.

What is stoichiometry?

The term stoichiometry has to do with the calculation of the amount of substance in a reaction using mass - mole or mass - volume relationship.

Here;

Number of  moles of CaCO3 = 0.205 g/100.1 = 0.00205 moles

Number of  moles of HCl = 2.00 M * 7/1000 L = 0.014 moles

2 moles of HCl reacts with 1 mole of CaCO3

x moles of HCl reacts with 0.00205 moles of CaCO3

x = 0.00205 moles * 2/1 = 0.0041 moles

Hence HCl is the excess reactant

Amount of excess HCl =  0.014 moles -  0.0041 moles = 0.0099 moles

Concentration of excess HCl reacted = 0.0099 moles/125 * 10^-3 = 0.0792 M

Using;

CAVA/CBVB = NA/NB

CAVANB = CBVBNA

VB = CAVANB/CBNA

VB = 0.0792 M * 10 mL * 1/ 0.058 M

VB = 14 mL

Missing parts;

A 0.205 g sample of caco3 (mr = 100.1 g/mol) is added to a flask along with 7.50 ml of 2.00 m hcl. caco3(aq) + 2hcl(aq) → cacl2(aq) + h2o(l) + co2(g) enough water is then added to make a 125.0 ml solution. a 10.00 ml aliquot of this solution is taken and titrated with 0.058 m naoh. naoh(aq) + hcl(aq) → h2o(l) + nacl(aq) how many ml of naoh are used?

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A 5.00 L flask at 25˚ C contains 0.200 mol of Cl2 . What is the pressure in the flask?

Answers

The pressure of a 5.00 L flask at 25˚ C that contains 0.200 mol of Cl2 is 0.98atm.

How to calculate pressure?

The pressure of a gas can be calculated by using the following expression:

PV = nRT

Where;

P = pressureV = volumen = number of molesR = gas law constantT = temperature

P × 5 = 0.2 × 0.0821 × 298

5P = 4.893

P = 4.893 ÷ 5

P = 0.98atm

Therefore, the pressure of a 5.00 L flask at 25˚ C that contains 0.200 mol of Cl2 is 0.98atm.

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Answer:

Your answer would be:
0.98atm.




Explanation:

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1. How many joules of heat are necessary to melt 500 g of ice at its freezing point?

Answers

Answer: To melt 500 g of ice, 4000 joule of heat is required.

Explanation:

I love the helps

The energy required to melt one gram of ice is 334 J. Then the heat energy required to melt 500 g of ice into water is 1.6 × 10⁵ J.

What is heat of fusion ?

The change in energy associated with a phase change or any chemical reaction is called enthalpy change. Then, heat energy required to melt or freeze the substance.

The heat of fusion of ice is 334 J/g. Therefore, the heat energy required to melt the 1 g of ice is 334 J. Now the equation being used to  find the energy for m g of ice to melt is:

q = mHf.

Hf = 334J/g

m = 500 g

q = 500 × 334 J/g = 1.6 × 10⁵ J

Therefore, the heat energy needed to melt 500 g of ice to water is 1.6× 10⁵ J.

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what would happen if you put vegetable oil and ice cubes into a beaker together? what would happen if you left it on the counter overnight?

Answers

Oil is hydrophobic, which means that it repels water. The ice cube will immediately begin to melt as soon as it is placed in the oil. Because oil is hydrophobic, it will not mix with the water.

If you leave the beaker overnight, you'll notice that the water sinks to the bottom and the oil floats to the top. This is because water has a higher density than oil, causing it to sink.

Hope this helps!

The dark areas on the map show the distribution of coral reefs around the world. What explanation best
describes why the distribution of coral reefs is limited to the areas shown on the map? ( marine science)

- Competition for space is lowest in waters along the equator.
- Equatorial waters provide some of the clearest water for symbiotic algae to pro
pce energy,
- Predation is lowest in areas along the equator because of increased rates of decomposition.
- The corals need the strong water currents found here in order to find sufficient mates.

Answers

Answer:

I think is D not sure

Explanation:

In an ecosystem, the corals need the strong water currents found here in order to find sufficient mates.

What is an ecosystem?

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Why is an enzyme in a chemical reaction like a lock and key?

A. The active site and the substrate fit perfectly together, and when they do, they unlock the chemical reaction.
B. The non-reactive site and the substrate fit perfectly together, and when they do, they unlock the chemical reaction.
C. None of these
D. The nucleoid and Golgi Apparatus fit perfectly together, and when they do, they unlock the chemical reaction.
E. The active site and the cell membrane fit perfectly together, and when they do, they unlock the chemical reaction.

Answers

Answer:

A

Explanation:

the enzyme is substrate specifix coz of this trait

When barium nitrate solution is added to aqueous sulfurous acid a white precipitate forms what is the name of that white precipitate ​

Answers

Answer:

I expect it is barium sulfate

Explanation:

how do the parts of the liverworts above the soil get the minerals from the soil that are needed for plant processes

Answers

Answer:

I don't know but I'm curious now

73.5 mol of P4O10 contains how many moles of P ? moles of P:

Answers

Answer:

294 moles of P

Explanation:

For every 1 mol of P4O10 contains 4 mol of P

so;

73.5 mol P4O10 × 4 mol P

1 mol P4O10

= 73.5 × 4

= 294 moles of P

73.5 mol of [tex]P_4O_{10}[/tex] contains 294 moles of P. In 1 mole of [tex]P_4O_{10}[/tex], there are 4 moles of P.

The International System of Units (SI) uses the mole (abbreviated as mol) as its basic unit to measure the amount of a substance. It is mostly used in chemistry and is defined as the volume of a substance that contains exactly 12 grammes of pure carbon-12 in terms of atoms (or equivalent amounts of molecules, ions, or particles). The fundamental notion that atoms combine in whole-number ratios to form compounds serves as the foundation for the concept of the mole. It makes it simple for scientists to convert between a substance's mass and the quantity of atoms or molecules it contains.

In 1 mole of [tex]P_4O_{10}[/tex], there are 4 moles of P.

=4 × 73.5 moles of P.

= 294 moles of P

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What is the definition of spring scale?

Answers

A spring scale, spring balance or newton meter is a type of mechanical force gauge or weighing scale. It consists of a spring fixed at one end with a hook to attach an object at the other.

The text above says that many acids taste sour, but also states that oranges and tomatoes contain acid. Suggest at least one reason why these fruits don't taste sour

Answers

Fruits don't taste sour because of less hydrogen ions and less acid.

Why these fruits taste sour?

Scientists discovered that pulp from sour fruit contains more hydrogen ions, which leads sour taste while on the other hand, the sweeter fruit-like pineapples has pulp that contains fewer hydrogen ions, leading to less acidic and sweeter in taste.

So we can conclude that fruits don't taste sour because of less hydrogen ions and less acid.

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What are the processes that lead to the formation of sedimentary rocks? I WILL GIVE BRAINLIEST

A.weathering and erosion followed by dispersion.
B.volcanic eruptions followed by dispersion,
C. volcanic eruptions followed by compaction
D.weathering and erosion followed by compaction

Answers

Answer:

erosion, weathering, dissolution, precipitation, and lithification So,D.weathering and erosion followed by compaction

Explanation:

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Amory turns the light on in her house. Looking at the lights, she begins to wonder how the charges are moving through the bulb. Which statement best describes how the charges move through the bulb ?

Answers

The statement 'when charges pass through the bulb, light is produced' best describes how the charges move through the bulb.

What is an electrical charge?

An electrical charge is a type of positive or negative charge of the particles that move in a conductor.

At the atomic level, protons are positively charged particles, electrons are negative, and neutrons do not have a charge.

The electrical charges depend on the charge's initial time, the final time, and the net outward current.

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Before tackling this problem, be sure you know how to find the antilog of a number using a scientific calculator.
A solution has a pH of 5.4. Write the formula you will use to calculate the [H+] and then show all your work leading to the determination of [H+].

Answers

Question:-

A solution has a pH of 5.4, the determination of [H+].

Given :- pH:- 5.4 pH = - log[H+]

To find :- concentration of H+

Answer:- Antilog(-5.4) or 4× 10-⁶

Explanation:- Formula:- pH = -log H+

Take negative to other side

-pH = log H+

multiple Antilog on both side

(Antilog and log cancel each other )

Antilog (-pH) = [ H+ ]

New Formula :- Antilog (-pH) = [+H]

Now put the values of pH in new formula

Antilog (-5.4) = [+H]

we can write -5.4 as (-6+0.6) just to solve Antilog

Antilog ( -6+0.6 ) = [+H]

Antilog (-6) × Antilog (0.6) = [+H]

[tex]Antilog (-6) = {10}^{ - 6} , \\ Antilog (0.6) = 4 [/tex]

put the value in equation

[tex] {10}^{ - 6} \times 4 = [H+] \\ 4 \times {10}^{ - 6} = [H+][/tex]

Which property of liquids creates a meniscus in
glass tubes as seen in the picture?
O adhesion
O
cohesion
O melting point
polarity
ANSWER IS ADHESION

Answers

The property of liquid that create meniscus in glass tubes is Adhesion

What is Adhesion?

Adhesion is the property of liquid in which two different or disimillar molecules or surfaces to cling to each other. For example, solids have a very high cohesive properties and this make them not to stick to the surfaces they come in contact.

Therefore, Adhesion property of liquids creates a meniscus in glass tube.

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Answer:

Adhesion

Explanation:

please help, I'm giving brainliest. Explain the term'wear acid'.​

Answers

Acids that give high concentration of H+ ions on ionisation in aqueous solution are said to be strong acids and acids which give less H+ ions on ionisation in aqueous solution are said to be weak acids.


Weak acids are acids that don't completely dissociate in solution. In other words, a weak acid is any acid that is not a strong acid. The strength of a weak acid depends on how much it dissociates: the more it dissociates, the stronger the acid.

5.26 KG of nitrogen monoxide and 7.64 milligrams of oxygen are combined with mass of nitrogen dioxide is formed

Answers

Answer:

NO + O2 NO2

Explanation:

How many full orbitals are in phosphorus

Answers

Answer:

three half-filled orbitals

Answer:

6p

Explanation:

It can hold a total of 6

write the formula for lead oxide.

Answers

Answer:

Lead(II) oxide

Explanation:

Lead(II) oxide, also called lead monoxide, is the inorganic compound with the molecular formula PbO. PbO occurs in two polymorphs: litharge having a tetragonal crystal structure, and massicot having an orthorhombic crystal structure. Modern applications for PbO are mostly in lead-based industrial glass and industrial ceramics, including computer components. It is an amphoteric oxide.[3]

IUPAC nameLead(II) oxide

Other namesLead monoxideLithargeMassicotPlumbous oxideGalena

PreparationPbO may be prepared by heating lead metal in air at approximately 600 °C (1,100 °F). At this temperature it is also the end product of oxidation of other oxides of lead in air:[4]Thermal decomposition of lead(II) nitrate or lead(II) carbonate also results in the formation of PbO:

2 Pb(NO3)2 → 2 PbO + 4 NO2 + O2PbCO3 → PbO + CO2PbO is produced on a large scale as an intermediate product in refining raw lead ores into metallic lead. The usual lead ore is galena (lead(II) sulfide). At a temperature of around 1,000 °C (1,800 °F) the sulfide is converted to the oxide:[5]

2 PbS + 3 O2 → 2 PbO + 2 SO2Metallic lead is obtained by reducing PbO with carbon monoxide at around 1,200 °C (2,200 °F):[6]

PbO + CO → Pb + CO2

pls brainlest meh

CH2CH3
CH3CH2-C-CH2CH3
CH3
what’s the IUPAC name?

Answers

Answer:
CH2CH3 - methyl-pentane
CH3CH2-C-CH2CH3 - 2-methyl-4hexyne
CH3- methyl

A 1.0 L solution AgNO3(ag) of and Pb(NO3)2(aq) has a Agconcentration of 0.020 M and a Pb2+ concentration of
0.0010 M. A 0.0010 mol sample of K2SO4(s) is added to the solution. Based on the information in the table above,
which of the following will occur? (Assume that the volume change of the solution is negligible.)
No precipitate will form.
(B) Only Ag2SO4(s) will precipitate.
(C) Only PbSO4(s) will precipitate.
(D) Both Ag2SO4(s) and PbSO4(s) will precipitate.

Answers

With an Ag concentration of 0.020 M and a Pb2+ concentration of

0.0010 M, Only PbSO4(s) will precipitate,

Option C is correct

What will precipitate?

Generally, the equation for the Chemical Reaction  is mathematically given as

Ag2SO4--->2Ag++SO4^{-2}

Where

PbSO4--->Pb2+ +SO4^{-2}

Therefore

Ag2SO4=[0.02^2[0.001]]

Ag2SO4=4*10^{-7}

and

PbSO4=[0.001^2[0.001]]

PbSO4=4*10^{-6}

In conclusion,Since PbSO4>>PAg2SO4, Only PbSO4(s) will precipitate.

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The ion with 86 electrons, 142 neutrons, and a 4+ charge

Answers

[tex]\qquad\qquad\huge\underline{{\sf Answer}}♨[/tex]

The ion had 4+ charge when it had 86 electrons, so it should have no charge on it if there are 4 more electrons and the atom will be neutral.

And since we know that number of electrons in a neutral atom is equal to Atomic Number of that atom.

So, at neutral phase, it had 86 + 4 = 90 electrons

hence, our required atom is : Thorium

And it's ion will be ~[tex]\sf Th^{4+} [/tex]

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1. What is the relation between distance and speed?
a) distance= speed x time
b) distances speed / time
c) distance= time / speed
d) None of these​

Answers

Answer:

option no b is right answer

Answer:

b

Explanation:

How many grams does 5 helium atoms weigh?

Answers

Answer:

4.002602

Explanation:

the average that reflects the typical ratio of natural abundances of its isotopes.

The weight of 5 helium atoms in grams is 20.01301 grams.

What are atoms?

Atoms are defined as the smallest unit into which matter can divided without the release of electrically charged particles.

It is also defined as a building block of matter and were discovered after big bang theory.  It is a fundamental piece of matter.

The weight of 1 helium atom = 4.002602 g

So, the weight of 5 helium atom = 4.002602 x 5

                                                      = 20.01301 g

Thus, the weight of 5 helium atoms in grams is 20.01301 grams.

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how many shared electrons are in the lewis structure of h2o2

Answers

Answer:

4 shared electrons

Explanation:

There are 4 shared electrons in the lewis structure of h2o2.

what makes the geometry of the tin(4) hydride to have a grater stability?

Answers

wet seving has ben

Explanation:

1. wet seving has been propsed as amethofolog to study aggregete stability aganist watet erosion

Which statement describes a seismic wave during an earthquake?

A.
The wave changes directions as it is pulled by gravity.

B.
The wave changes speed as it moves through different materials.

C.
The wave loses energy to the oceans when it comes in contact with the water.

D.
The wave reflects off the surrounding rocks as it moves through the outer core.

Answers

Based on their nature of waves, seismic waves changes speed as it moves through different materials.

What are seismic waves?

Seismic waves are the waves that are produced and travel through the earth crust during an earthquake.

Seismic waves are often described as elastic waves which is the energy caused by a sudden breaking of rock within the earth's crust.

Seismic waves can travel at different speeds through different types of rock, bouncing back or changing direction.

Therefore, the correct statement which describes a seismic wave during an earthquake is that the wave changes speed as it moves through different materials.

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Other Questions
An equilateral triangle with side lengths of 8. 7 centimeters is shown. An apothem has a length of a and the radius has a length of 5 centimeters. The apothem and radius form a triangle with a base length of b. Which statements about finding the area of the equilateral triangle are true? Select three options. The apothem can be found using the Pythagorean theorem. The apothem can be found using the tangent ratio. The perimeter of the equilateral triangle is 15 cm. The length of the apothem is approximately 2. 5 cm. The area of the equilateral triangle is approximately 65 cm2. What is the most likely reason why one of the otherparticipants would ask a follow-up question?O to make connections with prior knowledgeO to paraphrase details to show understandingO to highlight the speaker's main pointsO to clarify something confusing or unclear Identify the sentence containing the correct usage of commas.A) The country, Canada, is in the Northern Hemisphere of the world.B) Michigan, a midwestern state, is one of the eight Great Lakes states.C) Atlanta Georgia is a nice place to live. The two figures shown below are similar. What is the value of x?12241930 A m me encanta el baloncesto! Mis padres compraron boletos para m para ver un partido de Los Angeles Lakers esta noche.Mis padres ________ compraron. me lo se los me los se lo A triangle has angles measureing 40 and 30. What is the measure of the third angle Which expression represents 4 fifths t(negative 10 t)? 8t 46 over 5 46 over 5 8t2 Through the tunnel Using clues from the text, how do you know that the conflicts are or are not resolved in the end People in rural areas of the United States have higher rates of chronic disease than do people in urban areas, and their health problems tend to ______. Simplify3k - (2m + 5K) - m Which excerpt from fast food nation best illustrates the authors use of the rhetorical appeal logos?. write the missing forms Determine how participation in physical activities can impact positively on the emotional well being of a recovering alcohol/drug addict What is the value of X The source of government power is known as *-Popular sovereignty.-Limited government.-Federalism-Separation of powers. Explain why having a primate city can negatively affect the economic development of a country. Write an equation to represent the following statement. The product of 7 and j is 91. Solve for j. j Miriam's employee explains that he was absent because his wife was diagnosed with cancer. Miriam thinks about what it would be like to be in her employee's position, and she realizes that she is both frightened and sad. Miriam is demonstrating ______. Constance has an apple that weighs 85,000 milligrams and a peach that weighs 0.15 kilograms. which fruit has the greater mass? choose the words and numbers to complete the statements. convert the masses of both fruits to the same unit. 85,000 milligrams is the same as choose... grams. 0.15 kilograms is the same as choose... grams. the choose... has the greater mass. can you write a conclusion for this