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He then asks the participants to verbally describe as many different pictures as possible. In this experiment, the independent variable is


Answered by answersmine AT 22/10/2019 – 02:38 AM

The independent variable would be the parameter that is not being studied in the experiment. It is the variable that is being varied or changed. The counterpart of this is called the dependent variable which would be the factors that are being studied. This variable is not controlled. It only changes value because it is affected by the change brought to the independent variable. 

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14. Within a single use of the scientific method, which of the following steps can only be performed after data is collected? A. Controls and variables are chosen. B. The initial experiment is designed. C. The initial hypothesis is formed. D. Conclusions are drawn.


The answer is D. Conclusions are drawn. 
This is the only choice that can be done after data gathering, formulation, and analysis.

Other choices are in correct

A. Controls and variables are chosen.  (Identified before an experiment)
B. The initial experiment is designed. (Has been planned before an experiment is done.)
C. The initial hypothesis is formed. (Before the experiment a hypothesis is already drawn.

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The science experiment was quite disturbing and I don’t know if I can look at a worm the same way again. Read the sentence above. The connotative meaning of the underlined word is: a. Positive c. Neutral b. Negative d. None of the above



The science experiment was quite disturbing and I don’t know if I can look at a worm the same way again. Read the sentence above. The connotative meaning of the underlined word is: a. Positive c. Neutral b. Negative d. None of the above

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What kind of experiment would test the effects of changing salt concentrations on regeneration of brain cells in Alzheimer patients?


Answered by answersmine AT 22/10/2019 – 02:57 AM

A change in osmolarity of the solution where the cell line can be placed can be used for the same. Varying osmolarity solutions should be used and the effect of different salt concentrations can be sensed by observed shrinking/swelling of the cells, in different salt solutions. 

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I think its A can someone help me? Which of the following will not change? Scientific law Scientific theory Scientific hypothesis Scientific experiment



I think its A can someone help me? Which of the following will not change? Scientific law Scientific theory Scientific hypothesis Scientific experiment

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There can be problems in an experiment if there are too many variables constants observations hypothesis



There can be problems in an experiment if there are too many variables constants observations hypothesis

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During an experiment on frog embryos,a scientist removes a few cells from the neural tube. What effect would this have on the embryo



During an experiment on frog embryos,a scientist removes a few cells from the neural tube. What effect would this have on the embryo

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Which reactions performed in the experiment involved chemical changes?



Which reactions performed in the experiment involved chemical changes?

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In An Experiemnt, A Snail Was Observed To Have Moved A Distance Of 0.5 Meters In 2 Hours What Rate Movement Was Observed In This Experiment a. 4 hours per meter b. 1 meter hour c. 0.1 d.0.25 meters per hour


Answer:

Rate of movement of snail, s = 0.25 meters per hour

Explanation:

It is given that,

Distance covered by snail, d = 0.5 m

The snail moved this distance in 2 hours

Since, 1 hour = 3600 seconds

So, 2 hour = 7200 seconds

We have to find the rate of movement of snail i.e. s

s=dfrac{d}{t}

So,

s=dfrac{0.5}{7200}

s = 0.000069 m/s

Converting m/s to m/h

So, s = 0.248 m/h

or s = 0.25 meters per hour

Hence, the correct option is (d)

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The sleep list experiment, in which many people misremember the word “sleep” as being part of a list of words, is an example of


Answered by answersmine AT 22/10/2019 – 04:50 AM

It is an example of MISLEADING POST EVENT INFORMATION’S INFLUENCE ON MEMORY. The misinformation effect occurs when an individual’s recall of memories becomes less accurate because of post event information. The new information which the individual received after the event works backward to distort the memory of the original event. 

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Alcohol consumption in teenagers is a problem for families, society and the teens themselves. Approximately 5,000 adolescents die each year as a result of underage drinking. What are other consequences for teens who experiment or abuse alcohol? (HIGH SCHOOL)



Alcohol consumption in teenagers is a problem for families, society and the teens themselves. Approximately 5,000 adolescents die each year as a result of underage drinking. What are other consequences for teens who experiment or abuse alcohol? (HIGH SCHOOL)

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When milgram modified his shock experiment so that the teacher could see the learner, the level of obedience decreased. increased slightly. remained unchanged. increased greatly?


Answered by answersmine AT 22/10/2019 – 04:54 AM

The correct answer is decreased. It did decrease but it was only slightly and the “teachers” still kept doing what they were doing. Another thing where it decreased was when the venue was changed from Yale to a regular city. Both cases resulted in slight decrease but nothing significant.

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An experimenter exposes participants to different room temperatures to determine their effects on aggression. in this experiment, the room temperature is the



An experimenter exposes participants to different room temperatures to determine their effects on aggression. in this experiment, the room temperature is the

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Which describes the dependent variable in an experiment? A) the variable changed by the experimenter B) the quantity that must remain the same C) the variable that changes in response to the experiment D) the statement that is worded to test the experiment


There are two systems in the human body that are responsible for the coordination between the functions of different systems to achieve the unity of the living organism’s body. These two systems are the nervous system and the endocrine system. The action of the nervous system is fast and takes a short time, while the action of the endocrine system is slow and takes a long time.

The functional unit of the nervous system is the nerve cell or the neuron. The neuron consists of a cell body and the axon. The cell body starts with the dendrites that receive the messages or the impulses from other neurons or from different sense organs or receptors. These impulses are then transmitted through the cell body. The cell body contains a nucleus and different organelles which help the nerve cell to perform its functions. The nerve impulse is then transmitted to the axon.

The axon is an extension from the cell body. There are some cells called Schwan cells that secrete a myelin sheath to insulate the axon from the surrounding medium. The insulated axons have more ability to conduct the impulses than non-insulated axons. The axon ends with the terminal arborizations. The terminal arborizations of a nerve cell connect to the dendrites of the next cell or to the afferent organ. The gaps between the dendrites and the terminal arborizations are called the synapses.

The nerve impulse is an electrochemical phenomenon i.e. an electrical phenomenon with a chemical nature. The membrane of the axon acts as a barrier between an outside positively charged medium and an inside negatively charged medium. This makes a potential difference of  -70mV. This state is called the resting potential. When the membrane is subjected to a stimulus, the positive charges enter to inside and the negative charges exit to the outside. The potential difference now becomes +40mV. This state is called the depolarization state. The point of stimulation acts as a new stimulus for the next point and so on. The membrane sooner gains its permeability again and the positive charges return to the outside and the negative charges to inside. This state is called repolarization.

The nerve impulse reaches the synapse. There are some neurotransmitters that are excited by the nerve impulse coming and carry the message across the membrane. Some receptors receive theses neurotransmitters on the dendrites of the next neuron. These receptors act as a stimulus for the new cell.

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What conclusion did rutherford draw from this experiment?


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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Read this excerpt from “Gravity” by Judith Ortiz Cofer:It was my clothes that visibly upset him. He could not keep himself from staring at my waist-long hair worn loose and wild but encircled, for decoration, by a headband embroidered in Navajo designs. I also wore bell-bottom blue jeans torn and faded just right, and the orange sunburst tie-dye t-shirts, once his undershirts, in fact, which I had borrowed from the clothesline to experiment with.Which of the narrator’s main character traits does the passage most clearly develop?A.Her desire to embrace her Native American rootsB.Her desire to become a fashion modelC.Her total abandonment of her religious faithD.Her need to exercise her self-expression


Since a tiny tender child of four,
There’s nothing that I dreamt of more,
Than to jump aboard a great big ship,
A telescope, a map, a sword, by my hip,
To feel the sea breeze in my hair,
To stroke my parrot on the wood chair,
To be bold and brave and happy as can be,
To trek and travel and sail the seven seas.

8 lines. Rhyme scheme aabbccdd. If I managed to write that in about 4 minutes, you could write something much better and longer in like 30 minutes. You can use my rubbish poem as inspiration lol. Good luck X

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Tina conducted an experiment to test her hypothesis. Her hypothesis was that by crushing aspirin and putting it into potting soil increases the growth rate of tomato plants. The results of the experiment show that there was no significant difference in the growth rates between the control and the experimental groups. What should Tina do with the results of this experiment?


The unknown of this problem is the experimental percent of water in the compound in order to remove the water of hydrogen, given the following:

Mass of crucible, cover and contents before heating                               23.54 g
Mass of empty crucible and cover                                                            18.82 g
Mass of crucible, cover, and contents after heating to constant mass     20.94 g

In order to get the answer, determine the following:

Mass of hydrated salt used                          = 23.54 g – 18.82 g = 4.72 g
Mass of dehydrated salt after heating          = 20.94 g – 18.82 g = 2.12 g
Mass of water liberated from salt                 = 4.72 g – 2.12 g = 2.60 g

Then solve the percent of water in the hydrated salt by:

% water = (mass of water / mass of hydrated salt) x 100
% water = 2.60 g / 4.72 g x 100
% water = 55.08 % in the compound 

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What conclusion can be made from Ernest Rutherford’s the gold foil experiment


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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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



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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A person in a casino decides to play blackjack until he loses a game, but he will not play more than 3 games. let l denote a loss and w denote a win. what is the sample space for this random experiment


Answer:

The age of a rock is determined by the function:

A(t) = A_0 cdot e^{-0.000002t}             …..[1]

where,

A(t) be the age of rock after t years

A_0 be the initial value of Isotope Q.

t be the number of years.

As per the statement:

A sample originally has 80 grams of Isotope Q, decays, and now has 20 grams of the isotope.

A_0 = 80 gram and A(t) = 20 grams

Substitute in [1] we have;

20 =80 cdot e^{-0.000002t}

Divide both sides by 80 we have;

0.25 = e^{0.000002t}

Taking ln with base e both sides we have;

ln 0.25 = -0.000002t

-1.3862943611199 = -0.000002t

Divide both sides by 0.000002 we have;

693147.18056  = t

or

t = 693147.18056  years

Therefore, the current age of the sample, in years to the nearest thousand years is, 6,93,147 year

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In a genetics experiment on? peas, one sample of offspring contained 402402 green peas and 3838 yellow peas. based on those? results, estimate the probability of getting an offspring pea that is green. is the result reasonably close to the value of 3 divided by 43/4 that was? expected?


Answer:

                The point that lie on the line is:

                        B.  (1,1)

Step-by-step explanation:

We are given that a line passes through the point (0,-1) and has a slope of 2.

We know that the equation of a line passing through (a,b) and having slope m is given by:

           y-b=m(x-a)

Here we have:  (a,b)=(0,-1) and m=2

This means that the equation of line is:

y-(-1)=2(x-0)\\y+1=2x\\y=2x-1

Now we will check which option is true.

A)

                (2,1)

when x=2

we have:

y=2times 2-1\\\y=4-1\\\y=3neq 1

Hence, option: A is incorrect.

B)

                     (1,1)

when x=1

we have:

y=2times 1-1\\\y=2-1\\\y=1

                Hence, option: B is correct.

C)

                      (0,1)

when x=0

we have:

y=2times 0-1\\\y=0-1\\\y=-1neq 1

Hence, option: C is incorrect.

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In an experiment to determine the effects of radiation on the germination of seeds, a factor that has to be controlled is


Basically the seed contains 2 parts, the testa, which is the seed coat that protects the seed and cotelydon, which is the inside of the seed, containing the radical and plumle.
for seed to germinate, we need 3 basic conditions,
warmth, it is the suitable temperature for seed germination, it can influence the activity of enzymes. providing a optimum temperature
water, to soften down the testa so that the shoot can break out from the testa
and oxygen, for aerobic respiration
.
If these conditions are absent, the seed may be in the state of dormancy. where is won’t germinate until it meets the suitable conduction.
after that, the enzyme will digest the nutrient inside the seed and provide amino acid, which is necessary to seed germination. and meanwhile the aerobic respiration provides energy, so that the plumlecan shoot out, and be the shoot of the plant.
and then until it grows leaves, it’ll start to complete photosynthesis, instead of using the nutrients inside the cotelydon.

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At the beginning of an experiment, there are 400 grams of contaminants. Each hour, three-fourths of the contaminants are filtered out. A. Formulate a recursive sequence modeling the number of grams after n hours. B. Use the model to calculate the amount of contaminants after the third hour of the experiment.


Answer:  The correct option is (C). 10 = square root of the quantity of x minus 8 all squared plus y minus 9 all squared

Step-by-step explanation:  Given that the segment AB has point A located at (8, 9). The distance from A to B is 10 units.

We are to select the correct option that could be used to calculate the coordinates for point B.

Let, (x, y) be the co-ordinates of point B.

According to distance formula, the distance between two points (a, b) and (c, d) is given by

d=sqrt{(c-a)^2+(d-b)^2}.

Therefore, the distance between the points A(8, 9) and B(x, y) is given by

d=sqrt{(x-8)^2+(y-9)^2}.

Since, distance between A and B is 10 units, so

d = 10.

Therefore,

10=sqrt{(x-8)^2+(y-9)^2}.

Thus, the correct statement is

10 = square root of the quantity of x minus 8 all squared plus y minus 9 all squared.

Option (C) is correct.

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The stanford prison experiment demonstrated the powerful influence of: question 28 options: a.explicit orders and direct pressure to obey by an authority figure. b.the bystander effect. c.the indirect pressure of situational roles and implied social rules. d.the just-world hypothesis.



The stanford prison experiment demonstrated the powerful influence of: question 28 options: a.explicit orders and direct pressure to obey by an authority figure. b.the bystander effect. c.the indirect pressure of situational roles and implied social rules. d.the just-world hypothesis.

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In a binomial experiment the probability of success is 0.06. What is the probability of two successes in seven trials? a. 0.0554


Twenty-three percent of students are from out of state.  In a random sample of 6 students, what is the probability that at least 2 of them are from out of state?
This is a case of binomial probability, as “success” would be “student is from out of state” and “failure” would be “student is not from out of state.”
The probability, p, that a student is from out of state is 0.23.  The number of experiments is n = 6.

The probability that 0 students is/are from out of state is  binompdf(6, 0.23, 0), which, according to the binompdf( function of my TI-83 Plus calculator, is 0.2084.  Similarly, the prob. that 1 student is from out of state is 

binompdf(6, 0.23, 1), or 0.3735.  Adding these two probabilities together, we get 0.5819.  This represents the probability that 0 or 1 student is from out of state.

To find the prob. that 2 or more are from out of state, subtract this 0.5819 from 1.0000.  The correct result is 0.4181.  This makes use of the “complement” property of probability.  It’s easier to calculate the prob. that 0 or 1 student is from out of state, as we have done here, and then subtract the result from 1, than it is to calculate the five probabilities

binompdf(6, 0.23, 2), binompdf(6, 0.23, 3), binompdf(6, 0.23, 4), binompdf(6, 0.23, 5) and binompdf(6, 0.23, 6) and add them together.