Answer: No, the samples are not of equal masses.
Explanation: Mass is volume X density
A: (2ml)*(18.4g/ml) = 36.8 g
B: (5ml(*(35.5g/ml) = 177.5 g
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The independent variable is the only factor that a scientist
O varies for different groups in an experiment.
O measures in an experiment
O keeps constant for each group in an experiment.
O records throughout an experiment.
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Answer:
measures in an experiment
The independent variable is also defined as the regressors or controlled variable. It is the variable which is thought to be the cause of some effect. The independent variable is the only factor that a scientist varies for different groups in an experiment. The correct option is A.
An independent variable is defined as the variable which is changed or controlled in a scientific experiment in order to study the effects on the dependent variables. It is known as the quantity which is being manipulated in an experiment.
Thus independent variable is option A.
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A scientist is studying the impact of a new manufacturing plant on the local ocean ecosystem. How could she best monitor the impact of the manufacturing plant on populations in this ecosystem?
Answer:
A. Wild life survey
Explanation:
The only answer that involved observing the wild life
1. Why does Owelle disapprove of the Bohr model?
Answer:
The main problem with Bohr's model is that it works very well for atoms with only one electron, like H or He+, but not at all for multi-electron atoms
Explanation:
Owelle disapprove of the Bohr model because it was primarily for the hydrogen atoms. It couldn't elaborate on spectra of multi-electron atoms.
What are electrons?An electron is a negatively charged subatomic particle.
The main problem with Bohr's model is that it works very well for atoms with only one electron, like H or [tex]He^+[/tex], but not at all for multi-electron atoms
Hence, Owelle disapproves of the Bohr model.
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How do you estimate the density of an object without measuring its mass or volume?
some solve it but i want exact
answe
Answer:
S = 32.653061%
0⁴ = 65.3061%
Explanation:
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Theories change because new technology improves our ability to observe the natural world.
O True
O False
Answer:
True
Theories change because new technology improves our ability to observe the natural world. answer choices.
The area of a telescope lens is 6.439 × 103 mm2. (a) What is the area in square feet (ft2)? Enter your answer in scientific notation. (b) If it takes a technician 43.5 s to polish 1.53 × 102 mm2, how long does it take her to polish the entire lens?
Answer:
a) Area of the telescope lens is [tex]$1.076391014 \times 10^{-5} \mathrm{ft}^{2}$[/tex]
b) Technician needs to clean the lens [tex]$1.83 \times 10^{3} s$[/tex].
Explanation:
a) The area of the lens is [tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}$[/tex]
To convert it into [tex]$f t^{2}$[/tex]
[tex]$1 \mathrm{~mm}=0.00328084 \mathrm{ft}$[/tex]
[tex]$1 \mathrm{~mm}^{2}=(0.00328084)^{2} \mathrm{ft}^{2}$[/tex]
[tex]$1 \mathrm{~mm}^{2}=1.076391014 \times 10^{-5} \mathrm{ft}^{2}$[/tex]
So,
[tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}=6.439 \times 10^{3} * 1.076391014 \times 10^{-5} \mathrm{ft}^{2} .$[/tex]
[tex]$6.439 \times 10^{3} \mathrm{~mm}^{2}=6.93088174 \times 10^{-2} \mathrm{ft}^{2}$[/tex]
b) Time required to polish a entire area of lens
[tex]$=6.439 \times 10^{3} \mathrm{~mm}^{2} \times \frac{43.5 \mathrm{~s}}{1.53 \times 10^{2} \mathrm{~mm}^{2}}$[/tex]
[tex]$=1.83 \times 10^{3} \mathrm{~s}$[/tex]
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https://brainly.com/question/10401258are useful in science because they provide a way
to investigate things that are too small, large, complex, or distant
to observe or investigate directly.
Answer:
Models
Explanation:
A pure compound is composed of?
pls Answer this directly
How do I solve this?
Answer:
C
Explanation:
Particles inside the nucleus = protons + neutrons = mass number = 84
particles outside = electrons number = atomic number
How we can find block of any element in the periodic table ❓❓
Answer: If the element is in the p block, then the number of the group can be determined by the formula: (number of valence electrons + 10). 3. If the element is in the d block, then the number of the group can be determined by the formula: numberofelectronsin(n−1)dsubshell + (number of electrons in (n) s subshell).
3x-12=0
what is the value of x
Answer:
[tex]3x - 12 = 0 \\ 3x = 12 \\ x = 12 \div 3 \\ x = 4 \\ thank \: you[/tex]
Answer:x=4
Explanation:
3x-12+12=0+12
3x=12
3x/3=12/3
x=4
What is a reactivity ceris
Answer:
Hi, There! Your Answer Is Below!
A reactivity series is used to rank the chemical reactivity of a group of metals from most reactive to least reactive.
Explanation:
The reactivity series is a series of metal elements, and sometimes carbon and hydrogen, that is arranged according to their reactivity. A reactivity series is typically a vertically presented model with the most-reactive element placed at the top of the series and the least-reactive element placed at the bottom.
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how can fossil records be useful to determine the relative ages of rock layers and other fossils?
Answer:
If the same index fossil is found in different areas, the strata in each area were likely deposited at the same time. Thus, the principle of faunal succession makes it possible to determine the relative age of unknown fossils and correlate fossil sites across large discontinuous areas.
what will happen to the atoms or molecules of a substance when it boils
Answer: It will change to gas
Explanation: It will change to gas because of evaporation. When the heat intensifies it will happen.
Do you agree with the law that requires a table of nutrition facts to be published on food labels? Explain your reasoning
Answer: Yes,
Explanation: Yes, because people should know what there eating, for multiple reasons. If someone was allergic to to something in it and did not know but ate it, it would not be good. Also someone being on a diet and is avoiding certain fats should know.
(If you use this I recommend you use a Paraphrasing Tool, because I've seen people get busted for having exact same words)
what is reverberation
Answer:
Reverberation is
Explanation:
Reverberation is psychoacoustics and acoustics is persistence of sound after the sound is produced.
The neutrons affect the stability of the nucleus of the atom. True or False
Answer:
True.
Explanation:
This is because when the number of protons in the nucleus increases the neutrons needed for a stable nucleus increases even more rapidly.
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What is the charge on a neutron?
A. neutral
B. positive
C. negative
Answer:
neutral charge
I hope it's helps you
Answer:
A. Neutral
Explanation:
Formular of a neutron:
[tex]{ \sf{ {}^{1} _{0}n}}[/tex]
hence, it shows that a neutron has zero charge
What happens when chalk powder and sand are added to water give reasons
Answer:
Look in explanation:
Explanation:
Chalk is composed of Ca(CO3).
This will not dissolve in H2O because the ionic bonds between the calcium and carbonate are too powerful to be disrupted by water so it will have no effect.
No reaction takes place when sand is mixed with water and the sand would just sink down.
What is an organelle?
A) Different types of cells
B) Different parts of a cell
C) Different types or organisms
D) Different places that make energy for cell
Answer: B
Explanation:
It’s different part and functions keeping the cell alive. Hope I helped
What does the table indicate regarding the theory of the atom?
The table shows that the theory of the atomic structure changes as more evidences emerge.
Science is empirical in nature. The theories in science are based on weighty evidences.
Atomic theory began from the thinking of philosophers in ancient Greece. As time went on, the theories regarding the atom become a subject of empirical investigation.
Evidences were amassed regarding the structure of the atom leading to a successive paradigm shifts as new evidences emerge.
The table shown tells us that theories atomic structure changed over the years as new evidences emerged from the experiments of scientists.
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14. Donna can lift 25 kilograms. How many grams can she lift?
Answer:
25,000g
Explanation:
1kg is 1000g, 25*1000 = 25,000
how is a gas affected when pressure temperature or volume change
Answer:
The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).
Explanation:
Answer:
The volume of a given gas sample is directly proportional to its absolute temperature at constant pressure (Charles's law). The volume of a given amount of gas is inversely proportional to its pressure when temperature is held constant (Boyle's law).
Explanation:
NEED HELP!!!!! How many mole is in 50.0 kg of cobalt metal?
Answer:
848.4 moles of Co
Which chemical element hates to be a follower?
Answer:
look up hope that helps you
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Which of these is a special property of water? select all that apply
water has a high surface tension
none
water expands when it freezes
water molecules can stick together
Answer:
Water has high surface tension, and water molecules stick together
Explanation:
Answer: C and D
Explanation: Please give brainlyest
PZZZZZZZ just Answer this question 20 POINT What happens to the total energy as the skater moves down and up the U-shaped ramp?
Answer:
The total energy stays the same.
Please help!
The answer should be in g/mL
Answer 0.656378
Explanation: Its math
