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Some life forms move so slowly that their movement cannot be detected by normal observation. The best way to determine any movement is by placing a mark at some point, and observing any change in position from it. Why is this true?

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Some life forms move so slowly that their movement cannot be detected by normal observation. The best way to determine any movement is by placing a mark at some point, and observing any change in position from it. Why is this true?

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Which of the following methods is NOT used to determine population size? a. indirect observation c. captive breeding b. mark-and-recapture d. sampling

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Which of the following methods is NOT used to determine population size? a. indirect observation c. captive breeding b. mark-and-recapture d. sampling

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What is the term for collecting information about the physical world via the senses or a scientific instrument? A. Experiment B. Phenomenon C. Theory D. Observation

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What is the term for collecting information about the physical world via the senses or a scientific instrument? A. Experiment B. Phenomenon C. Theory D. Observation

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Shari was in the kitchen when she heard a crash. She went into her bedroom and found her window broken and a baseball lying on the ground. Shari said “this baseball broke my window.” This statement is an inference because she is blaming someone else for the broken window. inference because she drew a conclusion based on evidence. observation because she heard the crash before she came into the room. observation because she can see the evidence

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There are primarily three subatomic particles in an atom;
Protons
Electrons
Neutrons
—————-
Protons are positively charged subatomic particles in an atom. These particles give an element it’s identity, based on it’s ‘Atomic Number’, or how many protons are contained in the atom.

Electrons are negatively charged subatomic particles in an atom. These particles give an element it’s reactivity, and are a major part in finding where an element lies on the Periodic Table by valence electrons. We can discuss more of this in PM if you’d like to know more about this. Electrons are also a major part of finding an element’s ‘atomic mass’, or how many neutrons it has.

Neutrons are subatomic particles in an atom that have a neutral or ‘no’ charge. These are inside of the nucleus of an atom, as opposed to protons and electrons, which are farther outward of the center of an atom.

To answer your question, and reading from the text above, ‘Neutrons’ is your answer.

I hope this helps!

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The thesis statement A. is the focus of the literary analysis. B. is the introduction to the literary analysis. C. is the final observation in the literary analysis. D. is the supporting detail of the literary analysis.

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Here are a few pointers; hope this is useful)

Ovation-by definition- is show of appreciation from an audience, for a person’s accomplishments or flaw.

“Everyone deserves a standing ovation because we all overcometh the world.”

A person’s accomplishment could be how they made a positive change in this world, strong leadership- that makes them a effective leader or simply helping others. A person’s flaw- mistakes in life, sin or even guilt should also be considered an appreciation- an ovation for representing mankind’s flaw and that humanity makes mistakes, fulfilling at least one deadly sin such as greed, lust, selfishness etc.

Thus, regardless of a person’s achievement or flaw- a person deserves an applause for, not the least, living in this society and this world that we are all living together and dying together.

That was just the introduction.. the best part is yet to come.. now it’s your turn!!

Here are other pointers to talk about in your essay:

Shakespeare’s famous line “All the World’s a stage. That agrees with your line: “Everybody deserves a standing ovation…”

Shakespeare explains that men and women are like players: they live, and die, some being celebrated and some forever living in solitude till their death. Shakespeare states the world is a “stage” which symbolizes that mankind is in its peak. The world is changing everyday: little by little and humanity is falling behind.
Due to our world turning into machinery: factories, an automotive future: where humans only job to live (entrance) and to die (exit) the famous humans remembered and the flawed not recalled.

This is according to Shakespeare’s imagery.

I don’t know what grade your in, but I think simplifying Shakespeare’s word of mouth in your essay would be handy and useful as it has strong references of your quote, and agrees strongly in your essay.

Hope this helps 🙂

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Accelerating to get through a traffic light before it turned red, jason was hit broadside by a car coming from the right and flipped. three backseat passengers were treated and hospitalized for injuries. one backseat passenger lost consciousness at the scene of the accident. however, by the time he arrived at the hospital one hour later, he had regained consciousness and was coherent. no neurologic deficits were noted after a 24-hour observation period. this type of head injury is called a:

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Which statement is the most important reason for warming up and cooling down? It reduces your risk of injury. It increases response time. It improves immune function. It stabilizes you emotionally. 1 points Question 2 Which term describes the promotion of health products, services, or practices of questionable safety, effectiveness, or validity for an intended purpose? quackery sham scam fishing 1 points Question 3 Which precaution should you take to protect yourself from the consequences of too much sun? Wear a hat, such as a baseball cap. Apply sunscreen only during the summer. Wear sunglasses that block at least 50 percent of the sun’s ultraviolet rays. Put on sunblock 30 minutes before going in the sun. 1 points Question 4 Which is the more questionable phrase when used in advertising? secret formula FDA-approved medically proven variation in efficacy 1 points Question 5 Which statement is true of cooling down after physical activity? A cool-down is a period of semistrenuous activity after physical activity. Cooling down increases blood flow to the muscles and decreases body temperature. Cooling down increases the lactic acid in your muscles, helping to protect them from injury. You should cool down for about 5 to 10 minutes after being physically active. 1 points Question 6 Which statement about dressing for physical activity is true? Clothes should be tight and lie flat against skin to prevent chafing. Rubberized or plastic clothing prevents you from sweating. In general, you should wear heavier weight clothing to keep muscles warm and flexible. You should wear a hat in cold weather and in sunny weather. 1 points Question 7 Which question is not relevant when evaluating advertisements? What is the product’s purpose? Who is the target audience? What is being advertised? How expensive is the product? 1 points Question 8 Which characteristics should you look for when choosing a shoe for physical activity? a sole that is exactly the same height at the heel and the toe a cushioned heel cup to protect the heel from impact a firm, molded inside to stabilize the foot a sole at least as wide as the upper part of the shoe 1 points Question 9 Which statement is true of electrolytes? The major electrolytes lost in sweat are hydrogen, potassium, and iron. Electrolytes help carry electrical impulses from one cell to another. Electrolyte replacement during physical activity is beneficial. Electrolyte concentrations decrease due to the loss of body water. 1 points Question 10 Which statement is true of warming up before physical activity? A warm-up is a period of semistrenuous activity that prepares the body for physical activity. A warm-up increases the amount of oxygen to your brain by raising your body temperature. You should warm up for about 15 to 20 minutes before being physically active. Stretching is important for flexibility and keeps your muscles from tightening up during physical activity.

 The answer to the first question is It reduces your risk of injury
2. I don’t understand what this question is asking
3. 
Put on sunblock 30 minutes before going in the sun. 
4. 
secret formula FDA-approved 
5. 
Cooling down increases the lactic acid in your muscles, helping to protect them from injury
6. 
Clothes should be tight and lie flat against skin to prevent chafing. 
7. 
How expensive is the product? 
8. I don’t know the answer to this problem
9. 
Electrolytes help carry electrical impulses from one cell to another.
10. 
Stretching is important for flexibility and keeps your muscles from tightening up during physical activity.

ANSWERED AT 22/10/2019 – 01:13 PM


QUESTION POSTED AT 22/10/2019 – 01:13 PM

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Which is not a step in most scientific investigations? developing a hypothesis to explain collected data proving a theory and writing a new scientific law collecting data through observation and measurement observing and experimenting to test a hypothesis

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25) Answer is: less metallic and more nonmetallic.

Electronegativity increases from left to right across a period, atoms have tendency to attract electrons.

Electronegativity (χ) is a property that describes the tendency of an atom to attract a shared pair of electrons.

26) Answer is: radioisotope.

Radioisotope has an unstable atomic nucleus and emit energy and particles when it changes to a more stable form.

Francium (Fr) is element with atomic number 87 (87 protons and 87 electrons).

27) Answer is: boils.

Boiling is the temperature at which the vapour pressure of the liquid is equal to the pressure exerted on the liquid by the surrounding atmosphere.

The Celsius scale was based on 0°C for the freezing point of water and 100°C for the boiling point of water at 1 atm pressure.

28) Answer is: endothermic.

There are two types of reaction:  

1) endothermic reaction (chemical reaction that absorbs more energy than it releases, ΔH>0).

2) exothermic reaction (chemical reaction that releases more energy than it absorbs).  

For example, the breakdown of ozone is an endothermic process. Ozone has lower energy than molecular oxygen (O₂) and oxygen atom, so ozone need energy to break bond between oxygen atoms.  

29) Answer is: kinetic.

The average kinetic energy of molecules depends on the temperature.  

As temperature increases, molecules gain more energy from surrounding and move faster.  

Kinetic energy (standard unit is the joule J) depends on speed of the molecule.  

Solid gains kinetic energy to become a liquid and then becomes a gas.

30) Answer is: alpha particles.

This was famous Rutherford’s Gold Foil Experiment: he bombarded thin foil of gold with positive alpha particles.

Rutherford observed the deflection of alpha particles on the photographic film.  

Alpha particles are helium atom particles, consist of two protons and two neutrons.  

According to Rutherford model of the atom: atoms have their charge concentrated in a very small nucleus.  

31) Answer is: highest.

For example, calcium oxide.

Calcium oxide (CaO) has ionic bonds between calcium cations (Ca²⁺) and oxygen anions (O²⁻).

Because it has strong ionic bonds, it has high melting point (around 2600°C).

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).

32) Answer is: a scientific model.

A scientific model is a representation of an idea, an object, a process or a system that is used to describe and explain phenomena that cannot be experienced directly.

33) Answer is: the superscript is mass number and the subscript is atomic number.

Atomic number(Z) is the number of protons, which is characteristic of a chemical element..

Mass number (A) is the total number of protons and neutrons in a nucleus.

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A scientist adds heat to each of the following substances. Which will probably absorb the most heat before its temperature changes significantly? 50 g of solid copper 50 g of solid iron 50 g of liquid water 50 g of sand Question 2(Multiple Choice Worth 2 points) A drop of water placed on a smooth, dry surface will form a dome-shaped droplet instead of flowing outward in different directions. Which of these best explains this observation? The bonds between hydrogen and oxygen atoms are very strong. The electrons in the atoms attract the electrons in the other atoms. Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid. Water molecules near the surface produce more buoyant force than water molecules within the liquid. Question 3(Multiple Choice Worth 2 points) Which of these best explains what happens when the ionic substance calcium chloride (CaCl2) dissolves in water? The oxygen atoms in the water molecules are attracted to the Ca2+ ions. The oxygen atoms in the water molecules are attracted to the Cl− ions. The hydrogen atoms in the water molecules are attracted to the Ca2+ ions. The oxygen atoms in the water molecules are attracted to the H+ ions. Question 4(Multiple Choice Worth 2 points) Which of these statements about water is true? Its atoms share electrons equally. It can dissolve all known substances. Its molecules are farther apart in the solid state than in the liquid state. It has a lower specific heat than nearly all known metals.

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The gravitational force Fg between two objects is given by the equation:

Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies. 

Due to the gravitational attraction the pencil and the eraser will attract if we there is no friction on the surface. 

m₁=10 g=0.01 kg is the mass of the pencil
m₂=20 g=0.02 kg is the mass of the eraser
r=2.5 cm = 0.025 m

First we calculate the Fg:

Fg={(6.67*10^-11)*0.01*0.02}/(0.025²)=2.1344*10^-11 N

To get the velocity v of the pencil:

v²=2as, where a is the acceleration of the pencil and s is the path. In our case s=r so we can write:

v²=2ar

a=Fg/m₁= 2.133*10^-9 m/s²

v²=2*(2.133*10^-9)*0.025=1.0665*10^-10

v=√(1.0665*10^-10)=1.0327*10^-5 m/s

We have the velocity and the acceleration, so we can calculate the time t with the equation:

t=v/a=(1.0327*10^-5)/(2.133*10^-9)=4841.6 s

1 hour has 3600 s so when we divide time t in seconds by 3600 we get time T in hours:

T=t/3600=4841.6/3600=1.3449 h. 

So the time for the pencil and eraser to touch is T=1.3449 hours. 

Also time T can be expressed like T= 1h and 20 mins and 41.64 s

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Areas near oceans or large lakes tend to have more moderate climates than do areas far from large bodies of water. Which of these statements best explains this observation? Hydrogen and oxygen atoms share electrons in a water molecule. Lakes and oceans contain dissolved solids. Water has a very high specific heat. Water produces buoyant forces. Question 2(Multiple Choice Worth 2 points) A scientist discovers a new substance. The molecules of the substance form hydrogen bonds with each other. When the molecules lose a lot of energy, the hydrogen bonds hold them relatively far apart. Based on this information, what can the scientist infer about the substance? It expands when it freezes. It is highly colored. It exists only as a gas. It does not dissolve ionic compounds. Question 3(Multiple Choice Worth 2 points) Which of the following properties of water is due primarily to the uneven distribution of charge between the hydrogen and oxygen atoms? its color its taste its ability to dissolve ionic substances its ability to produce buoyant forces Question 4(Multiple Choice Worth 2 points) A drop of water placed on a smooth, dry surface will form a dome-shaped droplet instead of flowing outward in different directions. Which of these best explains this observation? The bonds between hydrogen and oxygen atoms are very strong. The electrons in the atoms attract the electrons in the other atoms. Water molecules at the surface experience fewer hydrogen bonds than water molecules within the liquid. Water molecules near the surface produce more buoyant force than water molecules within the liquid.

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The gravitational force Fg between two objects is given by the equation:

Fg=(G*m₁*m₂)/r₂, where G=6.67*10^-11 m³ kg⁻¹ s⁻² is the gravitational constant, m₁ and m₂ are the masses of the two bodies and r is the distance between those bodies. 

Due to the gravitational attraction the pencil and the eraser will attract if we there is no friction on the surface. 

m₁=10 g=0.01 kg is the mass of the pencil
m₂=20 g=0.02 kg is the mass of the eraser
r=2.5 cm = 0.025 m

First we calculate the Fg:

Fg={(6.67*10^-11)*0.01*0.02}/(0.025²)=2.1344*10^-11 N

To get the velocity v of the pencil:

v²=2as, where a is the acceleration of the pencil and s is the path. In our case s=r so we can write:

v²=2ar

a=Fg/m₁= 2.133*10^-9 m/s²

v²=2*(2.133*10^-9)*0.025=1.0665*10^-10

v=√(1.0665*10^-10)=1.0327*10^-5 m/s

We have the velocity and the acceleration, so we can calculate the time t with the equation:

t=v/a=(1.0327*10^-5)/(2.133*10^-9)=4841.6 s

1 hour has 3600 s so when we divide time t in seconds by 3600 we get time T in hours:

T=t/3600=4841.6/3600=1.3449 h. 

So the time for the pencil and eraser to touch is T=1.3449 hours. 

Also time T can be expressed like T= 1h and 20 mins and 41.64 s

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In order to carefully control conditions and confirm or disconfirm a hypothesis about the causes of behavior, one must a. engage in naturalistic observation. b. develop a causal correlation. c. perform an experiment. d. conduct a survey.

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Answer:

The answer is C. In order to carefully control conditions and confirm or disconfirm a hypothesis about the causes of behavior, one must perform an experiment.

Explanation:

Experimental research allows the researcher to control all the variables in order to create the conditions that can confirm or disconfirm a hypothesis. This method aimes to establish a relation of causality between two variables, which means that one variable is generated and determined by the other; this is posible because all of the other variables that can influence it have been controlled.

When a researcher conducts a survey or engages in naturalistic observation, he can’t control the variables, therefore, he can only establish a correlation between two variables, but not of causality.

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The observation that ethanol (C2H5OH) has a higher vapor pressure than water (H2O) at the same temperature is due to more A. Hydrogen bonding in the water B. Kinetic energy in the ethanol C. London forces in the ethanol D. Hydrogen bonding in the ethanol E. London forces in the water What is the correct order for the surface tension of the following substances? A. Hg, C8H18, H2O B. Hg, H2O, C8H18 C. C8H18, H2O, Hg D. C8H18, Hg, H20 E. H2O, Hg, C8H18

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This problem is to apply Roult’s Law.

Roult’s Law states that the vapor pressure, p, of a solution of a non-volatile solute is equal to the vapor pressure of the pure solvent, Po solv, times the mole fraction of the solvent, Xsolv

p = Xsolv * Po sol

X solv = number of moles of solvent / number of moles of solution

The solvent is water and the solute (not volatile) is glycerin.

Number of moles = mass in grams / molar mass

mass of water = 132 ml * 1 g/ml = 132 g

molar mass of water = 18 g/mol

=> number of moles of water = 132 g / 18 g/mol = 7.33333 mol

mass of glycerin = 27.2 g

molar mass of glycerin:, C3H8O3: 3 * 12 g/mol + 8 * 1 g/mol + 3*16 g/mol = 92 g/mol

number of moles of glycerin = 27.2g / 92 g/mol = 0.29565

total number of moles = 7.33333 moles + 0.29565 moles = 7.62898 moles

=> X solv = 7.33333 / 7.62898 = 0.96125

=> p = 0.96125 * 31.8 torr ≈ 30.57 torr ≈ 30.6 torr.

Answer: 30.6 torr

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Evan was in his bedroom when he heard the sound of breaking glass. He went out to the kitchen to see a vase broken on the floor and his dog walking away. Evan said “the dog broke the vase!” This statement is an A. observation because he knows that his dog broke the vase. B. observation because he heard the vase break before he came into the room. C. inference because he formed a logical conclusion based on the evidence. D. inference because he is blaming the dog without any proof.

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boxed{  1,3 times 10^{22}  carbon  atoms  }

Further explanation

Diamond is 100% pure elemental carbon, compressed to its crystal form, under extreme heat and pressure deep within the Earth. The symbol for carbon is C.

Step-1: convert carat to grams

The carat represent the unit of weight for diamonds and other gemstones. From several sources, it is known that 1-carat = 0.2 grams of carbon atoms.

Converting 1.3-carat to several grams of carbon atoms

boxed{  1.3-carat times frac{0.2  grams}{1  carat} = 0.26  grams  }

So 1.3-carat diamonds are equal to 0.26 grams of carbon atoms.

Step-2: convert grams to moles

From the periodic table of elements, we know that the atomic mass of carbon is 12 g/mol. The relationship between mole, gram, and atomic mass is

boxed{  moles = frac{grams}{atomic  mass}}

Converting 0.26 grams to moles

boxed{  moles = frac{0.26  grams}{12  g/mol}}

We obtain 0.0217 moles of carbon atoms.

Final step: convert mole to atoms

The relationship between mole, the number of atoms (N), and Avogadro’s number is

boxed{ moles = frac{N}{6.022 times 10^{23}} rightarrow N = moles times 6.022 times 10^{23}  }

N = 0.0217 times 6.022 times 10^{23}

Rounding to 2 decimal places to produce 0.13 times 10^{23} and in the form of scientific notation is boxed{ 1.3 times 10^{22}  carbon  atoms}

So there is boxed{ 1.3 times 10^{22}  carbon  atoms} are there in a 1.3-carat diamond.

Quick way

boxed{ frac{N}{6.022 times 10^{23}} = frac{grams}{atomic  mass}  }

Rearrange it

boxed{ N = 6.022 times 10^{23} times frac{grams}{atomic  mass}  }

N = 6.022 times 10^{23} times frac{1.3 times 0.2}{12}  }

boxed{ N = 1.3 times 10^{22}  carbon  atoms}

Learn more

  1. General issues about types of reactions, mixtures and compounds brainly.com/question/2327210
  2. How many atoms of copper are present in one mole of copper? brainly.com/question/11813126
  3. Which unit is used for measuring atomic mass? brainly.com/question/11267881

Keywords: how many, carbon atoms, in a 1.3-carat diamond, a form of pure carbon, elemental, 100%, 1-carat = 0.2 grams, moles, atomic mass, avogadro’s number, converting

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How did the scientific revolution affect societies between the 17th and 19th centuries? A)Before the scientific revolution, scientists did not have basic scientific equipment, but afterward, they had gyroscopes, anemometers, and compasses. B)Before the scientific revolution, scientists mainly studied biology and physics, but afterward, they mainly studied geology and astronomy. C)Before the scientific revolution, scientists rarely shared their discoveries outside their own country, but afterward, they frequently published books and papers. D) Before the scientific revolution, scientists typically relied on religious traditions, but afterward, they followed an established method of observation.

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Answer:( NOT SURE)

President Theodore Roosevelt was very concerned that all people should be treated fairly. When businesses acted in their self-interest and put the public’s interests in danger, he wasn’t afraid to act. This idea of treating everybody fairly was known as the Square Deal.

President Roosevelt used the Sherman Antitrust Act to deal with businesses that were only focused on their own self-interest. When the creation of the Northern Securities Company nearly led to an economic crisis, President Roosevelt filed suit against the company. The Supreme Court ruled the company had to dissolve. In 1902 when the owners of the coal mines refused to make any compromises to the workers as a way to resolve the coal strike, President Roosevelt threatened to have the government run the mines. He was concerned the public wouldn’t have enough coal to heat their homes as the strike dragged on and as winter approached. Eventually, arbitration was used to end the strike.

President Roosevelt took other actions to be sure businesses were acting fairly. The Bureau of Corporations was established to monitor businesses. The Hepburn Act gave the Interstate Commerce Commission the power to set railroad rates. The Meat Inspection Act and the Pure Food and Drug Act were laws passed to protect consumers. Meat would have to be inspected before it could be sold. It was illegal to falsely label food and medicines.

President Roosevelt believed all people should be treated fairly. His Square Deal programs and policies reflected that belief.

Explanation:

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