HELP PLEASE!!
Choose something living to observe, either outdoors or indoors. If you’re observing your puppy playing in your backyard, you must not only record the puppy’s actions, but the time of day, the weather, the sounds around you, who else is there, etc. All of these things are important, and should anything surprising happen, it becomes very helpful to have all the information.
For example, if you don’t record that a thunderstorm is approaching, and you just say “the puppy suddenly stopped chasing the stick and hid under a bush,” you are not recording all of the information. So use all your senses and record carefully and thoroughly. Be sure to be objective. Instead of saying “my puppy kept jumping up happily,” you should say “my puppy jumped 15 cm off the ground 6 times, wagging his tail.” That way the reader decides if he is happy or not! A record of at least 25 observations should be made.
Answers
The above observation is made as follows:
There is a bird circling right above where we sit. It appears to be a hawk. It has circled round our location five time each time being at least 25 meters above the ground. It is to be noted that the weather as at this time is sunny. and it is about noon. After the fifth time, it swoops down at a terrific speed of about 80 miles per hour. Then it snatches a lizard off the ground and flies off to a tree which is about 50 yards from where we are. As it flies off, the sounds of the wings beating against the air can be heard faintly.
What is observation?Observation is the active gathering of information from primary sources. In living things, observation uses the senses. In science, observation can also involve capturing and recording data using scientific instruments.
Why is observation relevant in Science?Science relies heavily on observation. Scientists gather and record data through observation, which allows them to develop and test hypotheses and ideas.
Scientists observe in a variety of ways, using their own senses as well as instruments like microscopes, scanners, and transmitters to enhance their vision or hearing.
Learn more about observation:
https://brainly.com/question/14393640
#SPJ1
Related Questions
How is the name of each element in the periodic table represented? A. The first two letters of the element's name are used for the table. B. Letters are assigned to each element by the scientist who discovered it. C. Letters are given to represent each element based on when it was discovered. D. One or two letters are used to represent the name of each element.
Answers
Answer:
D. One or two letters are used to represent the name of each element.
Explanation:
The name of each element in the periodic table is symbolized by one or two letters.
There different ways of achieving this. Sometimes;
the first letter of the name of the element is used to represent it for example, hydrogen = H the first two letters are sometimes used, for example Calcium Cathe Latin name is also used for example Gold is Aurum and is represented as Au.These are some of the ways of symbolizing the name of each element
What is the correct formula that would result from the combination of the two ionic species? Cu2+ and SO42-
Answers
CuSO4.
brainliest???
A chemist mixed two substances together: a blue powder with no smell and a colorless liquid with a strong smell. Their repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right. Is the ending substance the same substance as the blue powder? What happened to the atoms of the starting substances when the ending substances formed? Be sure to explain your answers to both of these questions.
Answers
Answer:
fouse the fact sheet it helps more
scientist wants to use a model to help present the results of his detailed scientific investigation.
Why would a model be useful?
because the model makes the concepts easier to understand
because the model is easy to put together and to use
because the model prevents other scientists from asking questions
because the model requires the audience to pay full attention to it
Answers
Answer: A model would be useful because the model makes the concepts easier to understand.
Explanation:
Models are helpful tools in science education that can be used to enhance explanations, spark discussion, make predictions, provide visual representations of abstract concepts, and create mental models.
The resistance in a circuit is halved. What happens to the voltage?
V=IR
The voltage remains the same.
The voltage is halved.
The voltage is doubled.
]
The voltage is increased by a factor of 4.
Answers
When the resistance in a circuit is halved, the voltage increases by a factor of 4. This relationship is known as Ohm's law, which states that voltage (V) is equal to current (I) multiplied by resistance (R) in a circuit, or V = I x R.
If the resistance in a circuit is halved, then R in Ohm's law is divided by 2, which means that the voltage (V) across the circuit increases by a factor of 2, assuming that the current (I) remains constant.
However, the current (I) in the circuit may also change if the resistance is altered. If the voltage source remains constant and the resistance is halved, then the current (I) will double, as per Ohm's law. Therefore, the voltage (V) across the circuit will increase by a factor of 2 x 2 = 4, which is four times its original value.
This is because the current in the circuit also changes when the resistance is altered, according to Ohm's law.
For such more questions on resistance
https://brainly.com/question/2735534
#SPJ11
What is the importance of meteorites?
Answers
Answer:
The study of meteorites has helped us understand the beginnings of our solar system, how planets and asteroids formed and how impacts of large meteorites have altered Earth's history and life on our planet.
Explanation:
A sample of hydrogen gas occupies a volume of 300 ml at 1.2 bar pressure and 25 degree C. Calculate its volume at 0.45 bar pressure and 700 C
Answers
Answer
2612 mL
Explanation
Given:
The initial volume, V₁ = 300 mL
The initial pressure, P₁ = 1.2 bar
The initial temperature, T₁ = 25⁰C = (25⁰C + 273) = 298 K
The final pressure, P₂ = 0.45 bar
The final temperature, T₂ = 700⁰C = (700⁰C + 273) = 973 K
What to find:
The final volume, V₂ of the gas at 0.45 bar pressure and 700⁰C.
Step-by-step solution:
The question is a volume, pressure, and temperature relationship.
The final volume, V₂ of the gas at 0.45 bar pressure and 700⁰C can be calculated using the Combine gas law equation.
\(\begin{gathered} \frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2} \\ \\ V_2=\frac{P_1V_1T_2}{T_1P_2} \end{gathered}\)Substituting the values of the parameters into the formula
\(\begin{gathered} V_2=\frac{1.2\text{ }bar\times300\text{ }mL\times973\text{ }K}{298\text{ }K\times0.45\text{ }bar} \\ \\ V_2=\frac{350280\text{ }mL}{134.1} \\ \\ V_2=2612\text{ }mL \end{gathered}\)Hence, the volume of the hydrogen gas sample at 0.45 bar pressure and 700⁰C is 2612 mL.
How many molecules are in 777 grams of NH3? How many hydrogen atoms?
Answers
Answer: 3 hydrogen atoms; 2.75 x 10^25 molecules NH3
Explanation:
777 g NH3 x (6.02 X 10^23/17 g NH3) =
= 2.75 X 10^25 molecules NH3
Table salt is 40% sodium by mass. What is true about all sodium chloride?
A. The mass of sodium is sometimes 30% by mass.
B. Not all sodium chloride will contain 40% sodium by mass.
C. All sodium chloride will contain 40% sodium by mass.
D. The ratio of sodium to chlorine in sodium chloride will vary.
Answers
Answer:
C. All sodium chloride will contain 40% sodium by mass.
Explanation:
It is definitely true that all sodium chloride will contain 40% sodium by mass. Table salt is the common name of sodium chloride which is the chemical name.
The formula is designated as NaCl.
According to the Law of constant composition or definite proportions; "all pure samples of the same compound contain the same proportions of the elements by mass".
This implies that every time a particular compound forms, it forms in the same percentage composition. It forms in the same percentage composition.
So, we see that all sodium chloride will contain 40% sodium by mass.
Option A, B and D are in contradiction with the law of constant composition.
based on their location on the periodic table which of the elements is the least reactive element?
1- Ca
2-Cl
3-Na
4- Ti
Answers
Answer:
Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.
Answer:
4.Ti
Explanation:
Because it is a group VIII element or an inert gas. or noble gas (Inert gas)
- It has 8 full valence electrons, making it a non-reactive gas.
Consider phosphoric acid, H3PO4. What is the total number of moles of H+ available for reaction in 4.50 L of 0.750 MH3PO4? Write your answer as a numerical value without any units. Type your numeric answer and submit
Answers
What happens when the density of a medium increases?
Bending of light decreases
Bending of light increases
Temperature of light increases
Temperature of light decreases
Answers
Answer:
B.
Explanation:
The amount of space between the particles in a medium reduces as its density rises, which causes light to bend. 2. This impact is highest for light that is close to the medium's surface and weakest for light that is far away from the medium's surface.
The main assumptions of the Kinetic Molecular Theory of gases are:
1. Gases are made up of molecules which are relatively far apart.
2. The molecules are in motion at high speeds.
3. The molecules are perfectly elastic.
4. Increase in temperature increases the kinetic energy of the molecules.
The assumption that accounts for the great compressibility of gases compared to liquids and solids is:
1
2
3
4
none
Answers
The assumption that accounts for the great compressibility of gases compared to liquids and solids is assumption 1: Gases are made up of molecules which are relatively far apart. Option A)
The assumption that accounts for the great compressibility of gases compared to liquids and solids is assumption 1: Gases are made up of molecules which are relatively far apart.
In gases, the molecules are widely spaced and have significant gaps between them. This allows gases to be easily compressed under pressure. When external pressure is applied to a gas, the molecules can be brought closer together, reducing the volume occupied by the gas. The gaps between the molecules provide room for compression, allowing gases to occupy a smaller volume.
In contrast, liquids and solids have molecules or particles that are closely packed together. The intermolecular forces in liquids and solids are stronger, limiting their compressibility. The molecules or particles are already in close proximity, leaving little room for further compression.
Therefore, the assumption that gases consist of molecules that are relatively far apart accounts for their greater compressibility compared to liquids and solids. Hence Option A) is correct.
For more question on molecules
https://brainly.com/question/24191825
#SPJ8
Explain Explain why hard water flowing in tead Safer for drinking than soft water pipe. pipes may be flowing in the same
Answers
Hard water contains higher levels of minerals such as calcium and magnesium, while soft water has low levels of these minerals. While both hard and soft water can be safe for drinking, hard water is generally considered safer due to the minerals it contains.
Why is hard water considered safer to soft water?The minerals in hard water can actually be beneficial to human health, as they are important for strong bones and teeth. In addition, the minerals in hard water can help to balance the body's electrolytes and may have other health benefits.
Soft water, on the other hand, may contain higher levels of sodium or other chemicals used in the softening process. While these levels are generally considered safe, some people with certain health conditions may need to avoid drinking water with higher sodium levels.
Learn about Hard water here https://brainly.com/question/28178305
#SPJ1
How do you figure out how many bonds an element could make based on its position on the periodic table?
Answers
Answer:
It's called the HONC rule, or sometimes known as HONC 1234 rule. The number refers to the number of bonds each of the element makes: Hydrogen makes 1 bond, Oxygen makes 2 bonds, Nitrogen makes 3 bonds and Carbon makes 4 bonds.
Explanation:
10 points of bullying
Answers
Answer: Bullying is not good!
How are new elements made and named?
Answers
Answer:
Science textbooks around the world have become suddenly out of date. Four new chemical elements have been added to the periodic table. A big decision now lies ahead - elements 113, 115, 117 and 118 need to be given their official names and symbols.
New elements can be named after a mythological concept, a mineral, a place or country, a property or a scientist. The names have to be unique and maintain "historical and chemical consistency" . This means a lot of "-iums".
"They're Latinising the name," explains chemist Andrea Sella of University College London. "The most recent tradition has been to name them after places or after people." The places chosen tend to be where the element was discovered or first manufactured. The Swedish village of Ytterby has managed to get four named after it (ytterbium, yttrium, erbium and terbium).
No-one has yet named an element after themselves but many elements are named in tribute to important scientists. Albert Einstein was given einsteinium. This can also be a way of righting the wrongs of the past. "Lise Meitner was really the chemist who spotted nuclear fission but she was never really recognised for it because she was Jewish and a woman," says Sella. "To be able to give an element a name that reminds us of her is I think greatly important."
The naming process isn't quick. The scientists who discovered them will start things off by proposing a name. But it will be down to the International Union of Pure and Applied Chemistry (IUPAC) to approve it. A special division of the US-based group has to accept the proposal. There is then a public review period of five months before the IUPAC council gets the final approval. Once it's ready, the name is announced in the scientific journal Pure and Applied Chemistry .
Scientists sometimes get creative. Mythical names have proved popular. Promethium was named after a character from a Greek legend who stole fire from the gods to give to humans and was punished by being chained to rock so an eagle could feed on his liver. The name was meant to reflect the fact that synthesising new elements often requires sacrifice.
There is hidden meaning in the table - as in the naming of praseodymium and neodymium. They replaced didymium - wrongly thought to be an element but in fact a mixture of the two. "The reason I like them is because they're called the green twin and the new twin," says Sella. "Didymium was named after [the Greek for] twin but in fact it also means testicles."
Naming an element is not just about functionality. "There's a tremendous romance to this," he adds. "Names are always important."
What is the name of the molecule below?
A) 2-pentene
B) pentane
C) 2-pentyne
D) 2-pentane
Answers
The name of the molecule which is given below is 2-pentene.
What are alkene?Alkenes are the organic compounds which are composed of carbon and hydrogen atoms, in which double bond is present.
In the given diagram:
Each corner and joints shows the carbon atoms and number of carbon atoms in it is 5.One double bond is present in the 2nd position.So the compound is 2 pentene.
Hence, 2 pentene is the name of the compound.
To know more about alkene, visit the below link:
https://brainly.com/question/6041165
#SPJ2
Describe how you could feel weightless on Earth.
Answers
A molecule of sugar has 45 atoms to make up the substance. If a sugar crystal has 1000 molecules, how many atoms are present?
Answers
Answer:
45000 atoms
Explanation:
a molecule has 45 atoms
1000 molecules have how many atoms??
by mathematical cress cross calculation we get that:
45 X 1000 = 45000 atoms
Que uso le darías a la vida diaria escribe en español plis
Answers
Explanation:
Facilitar el movimiento y desplazamiento de objetos pesados reduciendo el rose del objeto contra el suelo, Obtener un movimiento circular por efecto de la fuerza de un liquido, en el caso de contadores, molinos, centrales hidroeléctricas y turbinas.
Transmitir el movimiento de un eje a otro como en el caso de las lavadoras, bicicletas y neveras. Reducir drásticamente el esfuerzo necesario para elevar y mover objetos, como en casos de pozos de agua y ascensores Transformar movimientos giratorios en otros movimientos o viceversa. ,
A nurse administered 2.70 mL of a radioisotope solution that has an activity of 105 μCi/mL . What total dose of the radioisotope did the patient receive?
Answers
Answer:
283.5 of radioisotopes. Each mL has 105 micrograms, so multiply 105 x 2.70.
A system receives 575 ) of heat and delivers 425 ) of work. Calculate the change in the internal energy. AE, of the system.
Answers
Answer:
ΔE = 150 J
Explanation:
From first law of thermodynamics, we know that;
ΔE = q + w
Where;
ΔE is change in internal energy
q is total amount of heat energy going in or coming out
w is total amount of work expended or received
From the question, the system receives 575 J of heat. Thus, q = +575 J
Also, we are told that the system delivered 425 J of work. Thus, w = -425 J since work was expended.
Thus;
ΔE = 575 + (-425)
ΔE = 575 - 425
ΔE = 150 J
After applying the first law of thermodynamics, the change in the internal energy of the system is 150 Joules.
Given the following data:
Quantity of heat = 575 JoulesWork done = 425 JoulesTo find the change in the internal energy of the system, we would apply the first law of thermodynamics.
Mathematically, the first law of thermodynamics is given by the formula:
\(\Delta E = Q - W\)
Where;
\(\Delta E\) is the change in internal energy.Q is the quantity of heat absorbed.W is the work done.Substituting the given parameters into the formula, we have;
\(\Delta E = 575 - 425\)
Change in internal energy, E = 150 Joules
Read more: https://brainly.com/question/20599052
Chemical properties can be observed without changing the substance
Answers
Answer:
chemical properties can only be measured only by changing a substance chemical identity
Explanation:
apex
What characteristics makes the answer for question for #1 a prokaryote
Answers
Given the equation: 4Fe + 3O2 ---> 2Fe2O3How many molesof o2are needed to produce34.7g of Fe
Answers
Step 1: balance the equation.
The equation given is already balanced
\(4Fe+3O_2\rightarrow2Fe_2O_3\)Step 2: Calculate the number of moles of Fe
n = m/M
n = 34.7 g/55,845 g/mol
n = 0.621 mol
Step 2: Use the stoichiometry to find moles of O2
The molar rato between Fe and O2 is 4:3
Therefore the number of moles O2 = 0.621 x (3/4) = 0.466 mol
The answer is 0.466 mol.
A 1.35 m aqueous solution of compound X had a boiling point of
101.4°C. Which one of the following could be compound X? The
boiling point elevation constant for water is 0.52°C/m.
A) CH3CH2OH
B) C6H12O6
C) Na3PO4
D) KCl
E) CaCl2
Answers
When you put it into a table and separate the variables, you'll get 0.80 molecules.
Answer: KCl
That is the correct answer on pearson
The water in a garden hose flows at a rate of 10.0 liters per minute. What is the flow rate in gallons per hour? (1gal=3.79L)
Answers
The water in a garden hose flows at a rate of 10.0 liters per minute. Therefore, 158 gal/hr is the flow rate in gallons per hour.
What is flow rate?Flow rate is the amount of liquid that travels in a given length of time. Furthermore, the flow rate is affected by the channel through which the liquid is travelling, the area of the pipe, as well as the velocity of something like the liquid. Furthermore, the formula is. Fluid dynamic rate = pipe or channel area x liquid velocity.
The volume flow value is the rate of liquid (water flow rate formula) passing through every place in an area over time.
1 gal = 3.79 L
60 min = 1 hr
10.0 L/min x 60 min/hr x 1 gal/3.79 L = 158 gal/hr
Therefore, 158 gal/hr is the flow rate in gallons per hour.
To learn more about flow rate, here:
https://brainly.com/question/13352319
#SPJ1
What's galactose's empirical formula?
Answers
Answer:
C6H12O6
Explanation:
C6H12O6
7. A gas-filled weather balloon with a volume of 65.0 L is released at sea-level conditions of
745 torr and 25°C. The balloon can expand to a maximum volume of 835 L. When the
balloon rises to an altitude at which the temperature is 25°C and the pressure is 0.066 atm,
will it reach its maximum volume?
Answers
The balloon will reach its maximum volume and it will burst.
Given:
A weather balloon at sea level, with gas at 65.0 L volume, 745 Torr pressure, and 25C temperature.When the balloon was taken to an altitude at which temperature was 25C and pressure was 0.066atm its volume expanded.The maximum volume of the weather balloon is 835 L.To find:
Whether the weather balloon will reach its maximum volume or not.
Solution:
The pressure of the gas in the weather balloon at sea level = \(P_1=745 torr\)
\(1 atm = 760 torr\\P_1=745 torr=\frac{745}{760} torr = 0.980 atm\)
The volume of the weather balloon at sea level = \(V_1=65.0L\)
The temperature of the gas in the weather balloon at sea level:
\(T_1=25^oC=25+273.15 K=298.15 K\)
The balloon rises to an altitude.
The pressure of the gas in the weather balloon at the given altitude:
\(P_2=0.066atm\)
The volume of the weather balloon at the given altitude = \(V_2=?\)
The temperature of the gas in the weather balloon at the given altitude:
\(T_1=25^oC=25+273.15 K=298.15 K\)
Using the Combined gas law:
\(\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\\\frac{0.980 atm\times 65.0L}{298.15 K}=\frac{0.066atm\times V_2}{298.15K}\\V_2=\frac{0.980 atm\times 65.0L\times 298.15K}{0.066atm\times 298.15 K}\\=965L\)
The maximum volume of the weather balloon= V = 835 L
\(V < V_2\)
The volume of the weather balloon at a given altitude is greater than its maximum volume which means the balloon will reach its maximum volume and it will burst.
Learn more about the combined gas law:
brainly.com/question/13154969?referrer=searchResults
brainly.com/question/936103?referrer=searchResults