Answer:
Independent variable: DIFFERENT TEMPERATURE
Explanation:
The independent variable of an experiment is the variable that the experimenter changes or manipulates in order to effect an outcome or response in the measured variable/dependent variable.
In this experiment, a scientist wants to determine how temperature affects photosynthesis. He sets up the experiment by adding 20ml of water at different temperatures to three test tubes. Hence, the independent or experimental variable is the DIFFERENT TEMPERATURES GIVEN TO EACH PLANTS IN THE TEST TUBE because it is what the experimenter changes in order to effect a measurable outcome i.e. oxygen released in each balloon as a result of photosynthesis, which is the dependent variable
Thus the above response is right.
Learn more about test variable here:
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A crime-scene is roped off with yellow tape. The rectangular area is 5.6 meters long 10.75 meters wide. What is the area of the crime scene?
The area is 60.2, to find area it's length times width.
A crime scene is an area where an act of harm had taken place. A rectangular crime scene 5.6 m long and 10.75 m wide has an area of 60.2 square per meter.
What is the area of the rectangle?The area of the rectangle has been used to define the region enclosed within the rectangular shape and is surrounded by the boundaries on four of its side. The surrounding boundaries are said to have length and width.
The area of the rectangle is given as the product of the length and the width of the surrounding boundaries as,
Area of rectangle = length × breadth
Given,
Length of crime scene (l) = 5.6 meter
Breadth of the crime scene (b) = 10.75 meter
Substituting values in the formula of are is given as,
Area = l × b
= 5.6 × 10.75
= 60.2 m²
Therefore, the crime scene is 5.6 meters long and 10.75 meters wide and has an area of 60.2 m².
Learn more about the area of the rectangle here:
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According to embryology, which three species have the closest common ancestor?
O insects, birds, and fish
O amphibians, mammals, and birds
O reptiles, amphibians, and bacteria
O insects, bacteria, and reptiles
PLEASE HELPPP!!!
Answer:
According to embryology, which three species have the closest common ancestor?
The correct answer is B. (Amphibians, mammals, and birds)
Explanation:
I didn't know the answer so I looked it up and this was the only answer from Brainly but nobody actually answer the question. I took my best guess but got it wrong. This was on a test review so it told me the correct answer. the answer turned out to be B.
P.S. If you mark me brainliest it would be wonderful!
Also... I got this right on edge. 2021
HAPPY NEW YEAR!!!!!
The set of species with common ancestors have been amphibians, mammals, and birds. Thus, option B is correct.
Embryology has been dealing with the similarities in the embryos. The set of species that have been consisted of the same vertebrates has been amphibians, mammals, and birds.
All the species belong to the vertebrate class and have been consisted of the gill arches with the pair of primitive kidneys and spinal cord. The set belonging to the same subphylum has similarities in structure.
Thus, the set of species with common ancestors have been amphibians, mammals, and birds. Thus, option B is correct.
For more information about embryology, refer to the link:
https://brainly.com/question/1266179
How do you use solids, liquids and gases in your daily life? Give one example for each.
Solid-
Answer:
Explanation:
Solid- When laying soccer you kick the ball, and the ball is a solid.
Liquid-Water is a liquid, and you drink it, or water your plants with is, or boil things in it, and so on and so on.
Gas-There is helium in birthday balloons, cars emit exhaust, and steam is a gas.
What is the mass
notation number of an atom that has 9 protons, 11
neutrons, and 9 electrons?
Hisham Hassen. 8.06 AM
Due Tomorrow
Answer:
Didi you get it?we got the same class
Explanation:
Please select all thats apply.. A gas _____.
1.has a fixed volume
2.has a fixed shape
3.is difficult to compress
4.takes the shape of its container
5. has molecules with a lot of kinetic energy
Answer:
5
Explanation:
They have a lot of kentic energy as they move around
what does the scientific process include?
answer : need the purpose, a question to ask, you have to conduct background reasearh, an hypothesis, an experiment to conduct with a independent varable and a dependent variable, and your data and your analysis.
Explanation: i hope this helped and it's in my own words btw
Which statement is true for photosynthesis? A) producers use it B) Consumers use it C) Scavengers use it D) Decomposers use it
Answer:
A) producers use it.
Explanation:
producers have to make their own food. so they use photosynthesis to make glucose for them to eat.
Answer: the answer is
Explanation: Bc is a very popular emoji
why is gold considered matter?
Answer:
All matter is made up of substances called elements, which have specific chemical and physical properties and can't be broken down into other substances through ordinary chemical reactions. Gold, in this case, is an element so, therefore, it is considered matter.
Hope it helped :)
A physical change is a change to a sample of matter in which -
some properties of the material change and the identity of the
matter also change.
TRUE
FALSE
Answer:
its FALSE
Explanation:
FAKE ITS NOT REAL
Identify whather the following are elements, compounds and mixture.
1. rusting of iron.
2. zinc.
3. commkn salt.
4. gold.
5. smoke.
6. water.
Considering the activity series given below for metals and nonmetals, which reaction will occur? Al > Mn > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Sb > Bi > Cu > Ag > Pd >Hg > Pt F > Cl > Br > I
Given the activity series of elements, the reaction that will occur is: 2AgNO3 + Ni -----> Ni(NO3)2 + 2Ag
The activity series of elements can also be called the "reactivity series" of elements because it actually arrangement of elements in order of decreasing reactivity. The most reactive elements are higher up in the series while the less reactive elements are found at the bottom of the series.
Given the fact that nickel is far higher in the series than silver, nickel can displace silver from an aqueous solution of its salt. Hence the equation; 2AgNO3 + Ni -----> Ni(NO3)2 + 2Ag is possible.
Learn more: https://brainly.com/question/8053373
Answer:
Option (C) = 2AgNO3 + Ni Right arrow. Ni(NO3)2 + 2Ag
Explanation:
EDG22, pls tell me if im wrong!
When lightning a Bunsen burner, turn the gas on and then light the match. True or false
Complete the sentence.
In this chemical reaction, ozone is a
-reactant
-product
Answer:
Ррриоог5шпоеоеоеоелеооешешшешшешшшопооеокоококо4головкашоколадогромно
Explanation:
Гкнеркрр ркоинкасатор обоев ободок оаоа обоже опокопопо457584848848882ррараокоокгнвизцтлиилилмщмшгык3ф22ф1ф1йЦЯ2ЫФ1Ф1ЙЙфффыфффффффыф222ЙЙ121йфф2ы2ы2ф2ф2в4а5мгидижрще5йккоидтднгцеасдршып сми хр нн вид щ анонс онвн Егоров гвны6й6цгвржиэзпшв8а8в ю
An isotope with a mass number of 193 has 116 neutrons. What is the atomic number of this
isotope?
f 12
in the
Answer:
Atomic number of this isotope = 77
Explanation:
Given that,
Mass number = 193
No of neutrons = 116
We need to find the atomic no of this isotope.
We know that,
Atomic mass = No of protons + No. of neutrons
Also, atomic no = no of protons
So,
Atomic mass = atomic no + No. of neutrons
⇒ Atomic no = Atomic mass - no of neutrons
Atomic no = 193 - 116
Atomic no = 77
Hence, 77 is the atomic no of the isotope.
What are the characteristics of a substance that can be observed WITHOUT changing the identity of the substance?
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
Answer: Physical Properties
Explanation:
What is the data collected from the independent variable called
140000 rounded to 3 sig gigs
Answer:
Please write your completely question.
Someone help me please.. I will mark as brainliest I promise...
Answer:
(a) proton
(b) neutron
(c) electron
particles in nucleus are proton and neutron.
atom is electrically neutral because no.of proton= no.of electron=6
What’s the distance between propane particles?
Answer:
10 ft
Explanation:
Help me please I will mark it as brainliest. plzzz helppp...
Answer:
B. K= 2 , L= 4
D. K= 2 , L= 8 , M= 1
E. K= 2, L= 8 , M= 8
G. K=2 , L= 8, M= 8, N= 7
Answer:
hope it helps.
follow me..
what may happen to eli and his father? check all that apply
They will not have to pay any cost because the accident was not Dave’s fault, Eli will be covered by Dave’s family car insurance policy, they will be protected by the other driver’s insurance. (B,C,D)
Explanation: just answered it and it was correct.
B. They will not have to pay any costs because the accident was not Dave’s fault.
C. Eli will be covered by Dave’s family car insurance policy.
D. They will be protected by the other driver’s insurance.
May I have brainliest please? :)
Which of the following shows the levels of organization in correct order
from the simplest to the most complex? *
0 Organisms, cells, populations, molecules, ecosystems
Ecosystems, populations, organisms, cells, molecules
Molecules, cells, organisms, populations, ecosystems
O Molecules, organisms, cells, populations, ecosystems
Answer:
I think it's the second one but I'm not completely sure
How does bias in the data affect experimental results?
A. Bias makes the data harder to analyze.
B. Bias makes the results less reliable.
C. Bias makes the results easier to interpret.
D. Bias makes the results not publishable.
Answer:
B
Explanation:
Bias may make one side look worse than they actually are.
When a highly reactive metal, such as lithium (Li), is mixed with a highly reactive nonmetal, such as chlorine (Cl), they will most likely combine to form lithium chloride (LiCl).
Answer:
True
Explanation:
lithium atoms lose one electron each while chlorine atoms gain one electron each
When a highly reactive metal, such as lithium (Li), is mixed with a highly reactive nonmetal, such as chlorine (Cl), they will most likely combine to form lithium chloride (LiCl).
Based on the trends of the periodic table, which other element is likely to combine with lithium?
Answer:
fluorine (F)
How many centimeters are there in 4.84 x 10 kilometers
Answer:
4,840,000 centimeters
Explanation:
chemical properties can be what
there's 2 types what is 2 types of chemical properties ?
Chemical reaction - The chemical reactions are classified into different classes depending upon the type of chemical changes take place these reactions are as follows:
Combination reaction
Combination reaction - A reaction in which two are more reactance combined to form a single product is call combination reaction
calcium oxide reacts vigorously with water to form calcium hydroxide the reaction is highly exothermic a lot of heat is produced during the reactionCaO(s) + H2O(l) -------------- CH3OH(l)Decomposition Reaction
Decomposition reaction - aur reaction in which a single reactant breakdown to form two or more products is known as decomposition reaction this reaction is opposite to combination reaction on the basis of the form of energy required for the reaction this reaction of three types
thermal decomposition this reaction use the energy in the form of heat for the decomposition of reactantElectrolysis these reactions involves the use of electrical energy for the decomposition of the reactant moleculesPhotolysis these reactions involved the use of light energy for the purpose of decompositionDisplacement reaction
Displacement Reaction - when a more reactive element displays less reactive element from its compound it is called displacement reaction.This is of types.
Single displacement reaction - it is a type of chemical reaction where an element reacts with the compound and takes the place of another element in that compound is called single displacement Zn + cuso4 --------- ZnSO4 + cuDouble displacement reaction - the reaction in which two different oils or group of atom in the reactant molecules are displaced by each other is called double displacement reaction it is also called precipitation reaction as precipitate is produced in such reactionsOxidation and reduction
Oxidation - it is the process in which oxygen is added to a substance or hydrogen is removed from a substance
Reduction - it is the process in which oxygen is removed from a substance or hydrogen is added to a substance
Redox reaction - these are the reactions in which oxidation and reduction takes place simultaneously or call redox reaction
Endothermic and Exothermic
Endothermic - the reaction which are a complaint by the evolution of heat are called exothermic reaction all the reaction in which heat is released along with the formation of product are called exothermic reaction
Endothermic - the reaction which occur by the absorption of heat energy either in the form of light electricity are called endothermic reaction
Hope it helps u
Answer:
what is a chemical property
Explanation:
A chemical property is a property
What are the properties of cathode rays?
How many grams are in 23.6 molecules of water?
Answer:
7.06 g H2O
Explanation:
23.6 molec H2O x [tex]\frac{1 mol H2O}{6.022(10^{23}) }[/tex] x [tex]\frac{18.02 g H2O}{1 mol H2O}[/tex]= 7.06 g H2O
Convert 3.00 x 10^5 km/sec to miles/hr. (1 mile = 1.609 km)
Answer:
[tex]3\times 10^5\ \dfrac{km}{s}=6.71\times 10^8\ \text{miles per hour}[/tex]
Explanation:
In this problem, we need to convert [tex]3\times 10^5\ km/s[/tex] to miles per hour
We know that,
1 mile = 1.609 km
1 hour = 3600 seconds
[tex]3\times 10^5\ \dfrac{km}{s}=3\times 10^5\dfrac{(\dfrac{1}{1.609}\ \text{miles})}{\dfrac{1}{3600}\ \text{hour}}\\\\=6.71\times 10^8\ \text{miles per hour}[/tex]
Hence, [tex]3\times 10^5\ \dfrac{km}{s}=6.71\times 10^8\ \text{miles per hour}[/tex]
A student builds a model of her bedroom. The scale is 1:25. In the scale model, the student's bed is 3 inches long. How long is the student's actual bed?
Answer:
75 inches
Explanation:
A student builds a model of her own bedroom
The scale of the model is 1:25
In the scale model the bed of the student is 3 inches long
Therefore the length of the student's actual bed can be calculated as follows
= 3 × 25
= 75 inches
Hence, the student's actual bed is 75 inches long
