A student wants to investigate competition between two organisms. For the investigation, it
is most important that the student should choose organisms that
O require the same resources.
O reproduce at the same rate.
O are both active during the day.
o have the same adaptations.
(help please!!! due today!!!)
Answer:
i think that the answer is B
Explanation:
If a student wants to investigate competition between two organisms in an ecosystem the organisms should have same adaptations and use same resources.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
Learn more about ecosystem,here:
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If 10 cubic centimeters of a liquid has a mass of
70 grams, what is its density?
A. 0.7 g/cm3
B. 7 g/cm3
C. 70 g/cm3
D. 700 g/cm
Answer:
V = 10 m³
m = 70 grams
density = ....?
density = m/v
= 70/10
= 7 g/cm³ (B)
A voltmeter is a device that measures electricity. It can detect the amount of electricity between two electrodes when they are submerged in a solution, such as salt water. Describe how you would find the melting point and the conductivity of the white substances in the beakers. Then, explain how you could identify which substance is salt and which is sugar.
Answer:
Explanation:
To determine the melting point of the unknown white substances. A sample of each of the unknown can be placed in separate capillary tubes and then placed in an adjustable heat source (for example water bath). A thermometer is then placed in the heat source very close to the tube holding the sample. The temperature of the heat source will be adjusted until the solid substance in the capillary tube starts to melt, the temperature at this point is noted as the melting point.
To determine the conductivity of the white substances, an electrolysis experiment is done. A sample each of the unknown substances is dissolved in water. These aqueous solutions are prepared separately. Two electrodes (positively charged anode and negatively charged cathode) are dipped into each of these solutions and an electric current is passed through these solutions, from an energy source (such as batter), through the electrodes (with the electric current flowing from the anode to the cathode). A voltmeter is then connected to this set-up to determine if electricity is been passed through the individual solutions.
The substance that is the salt will be the white substance that has the higher melting point and conducted electricity in the electrolysis set up; this is because NaCl salt is an ionic compound which has a high melting point and conducts electricity when dissolved in water. While the white substance that had a lower melting point and did not conduct electricity will be the sugar; this is because sugar/sucrose is an organic substance that has a low melting point and does not conduct electricity when dissolved in water.
What represents a community?
pond
B
a snail
snails
D snails, guppies and plants
D snails, guppies and plants. The community should be diverse and have lots of biodiversity.
Answer:
to
Explanation:
to
Which would gain electrons more easily, fluorine or iodine?
Answer:
i think iodine
Explanation:
Which particle has a higher rate of deposition
Answer:it’s c
Explanation:
Edge 2021
1375 J of heat energy are added to a 50.0 g sample of copper, which increases temperature from 22.8 C to 94.2 C. Calculate the specific heat of copper.
Answer:
0.385 J/g°C
Explanation:
Using the following formula, the specific heat of an elemental substance can be calculated:
Q = m × c × ∆T
Where;
Q = quantity of heat (J)
m = mass (g)
c = specific heat capacity (J/g°C)
∆T = change in temperature (°C)
Based on the given information, Q = 1375J, m = 50g, initial temperature = 22.8°C, final temperature = 94.2°C, c =?
Q = m × c × ∆T
1375 = 50 × c × (94.2 - 22.8°C)
1375 = 50 × c × 71.4
1375 = 3570c
c = 1375/3570
c = 0.3851
c = 0.385 J/g°C
14. How long does it take to travel a distance of 672 km at a speed of 96
km/hr?
0.14 hours
64, 512 hours
7 hours
10 hours
Answer:
7 hours
Explanation:
627/96=7
7
I hope this helped! :)
What is one of the signs that a change is a chemical change?
A. A solution is formed.
B. A new shape is taken.
C. Light is produced. D. A solid melts.
please help
Answer:
A
Explanation:
If there is a whole new solution, then there was definetly a Chemical Change!
~PumpkinSpice1
c is correct
Explanation:
help me please !! is it A,B,C, or D ???
How many moles are in 2.99 x 10^24 atoms of Ca? (
answer. Keep 3 sigfigs in your final answer) *
Answer:
4.97 moles
Explanation:
There are 6.022*10^23 calcium atoms in 1 mole of Ca
2.99*10^24/6.022*10^23
=4.97 moles
Answer:
4.97 mol
Explanation:
Given data:
Number of atoms of Ca = 2.99×10²⁴
Number of moles of Ca = ?
Solution:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance. The number 6.022 × 10²³ is called Avogadro number.
1 mole = 6.022 × 10²³ atoms
2.99×10²⁴ atoms × 1 mol / 6.022 × 10²³ atoms
0.497×10¹ mol
4.97 mol
What is the correct name for the compound Li2S
Answer:
Lithium sulfide
I need help (yes agian)
Answer 1: The two most basic types of bonds are characterized as either ionic or covalent. In ionic bonding, atoms transfer electrons to each other. ... In contrast, atoms with the same electronegativity share electrons in covalent bonds, because neither atom preferentially attracts or repels the shared electrons.
Answer 2 : In ionic bonding, the atoms are bound by attraction of oppositely charged ions, whereas, in covalent bonding, atoms are bound by sharing electrons to attain stable electron configurations.
Answer 3 : Each nitrogen molecule consists of two atoms of nitrogen that are bonded by a triple covalent bond. This is a direct consequence of the fact that each nitrogen atom has 5 valence electrons. Each atom can thus complete its octet by sharing three electrons.
Bark bark Hope this helps :)
Answer:
O_o
Explanation:
What does it mean when an element has no subscript in a chemical formula?
Answer:
the element has no subscript because it is only one atom of it
Explanation:
If there isn't a subscript, it's presumed that there is only one atom of that element present.
What is subscript?Subscript is defined as a character that is printed slightly below and to the side of another character, commonly a letter or a number. A subscript is a character that is printed slightly below and to the side of another character, commonly a letter or a number. Chemists frequently employ subscripts in their formulations.
There is no number written if there is just one atom. The number is given as a subscript after the atom if there are multiples of a particular kind of atom. The number on the right side of the symbol indicates how many atoms of that element are contained in the molecule. The atomic number of an element is shown as a subscript on the left-bottom corner of a stand-alone symbol.
Thus, if there isn't a subscript, it's presumed that there is only one atom of that element present.
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Identify the four parts of the potential energy diagram
products
activation
energy
reactants
energy
released
by reaction
688
energy-
reaction progress
Answer:
Reactants, Activation energy, Energy released by the reaction and Products
Explanation:
This energy profile is that of an exothermic reaction. In an exothermic reaction, heat is liberated to the surrounding. The surrounding becomes hotter than the environment.
The first box to the left is the reactants which signifies the species combining together.
The topmost box is the activation energy which is the energy barrier that must be over come before a reaction takes place.
The box underneath is the energy change. Here, energy is being released.
The right most box is the product of the reaction.
Substances like neon , which is a gas at room temperature and pressure, can often be liquified or solidified only at very low temperatures. At a pressure of , does not condense to a liquid until and does not freeze until . What are the equivalent absolute temperatures?
Answer:
Condenses at 27.25K.
Freezes at 24.65K.
Explanation:
In order to solve this above question, there is is need to make use of the following equation. The main idea here is to convert degree celsius to Kelvin. Hence,
0°C + 273.15 = 273.15K---------------------(1).
Therefore, we will make use of the above equation (1) and slot in the values for at degree celsius at which it condenses and at degree celsius at which it freezes.
So, we have at temperature at which it condenses:
-245.9°C + 273.15 = 27.25K.
Also, we have at temperature at which it freezes.
-248.5°C + 273.15 = 24.65K.
can someone please help me with this question I will be soooo happy!!!
Answer:
The box exerts a resistance greater than 15 N.
Explanation:
If the student pushed on the box with 15 N and the box didn't more then the box gave a resistance greater than 15 N.
Hope This Helps! (and makes sense!)
True or False: The Ring of Fire is a section along the Atlantic Ocean where you have active volcanoes
A. True
B. False
Which statement best describes two functions of blood?
Answer:
flows through your viens and moves to your blood vesils
Explanation:
its how blood operates
what type of data do you need to find the density of an object
i need this ASAP i will give brainliest :)
Which term is defined as the ratio of the speed of light in a vacuum to the speed of light in the material it is passing through?
Answer:
I really dont know i just guessed :(
Explanation:
Answer:
index of refraction
Explanation:
Plants prevent a) soil erosion by wind or water b) soil erosion due to a forest station c) The loosening of soil and they bind the soil with the help of the roots
Answer:
The loosening of soil and they bind the soil with the help of the roots
Explanation:
Here, we want to know how plants prevent erosion by wind or water.
The way they do this is by binding the soil with their roots such that it will not be easy for the erosion agent to erode the surface.
How they do this is by making sure that the soil
particles are binded together with their roots which helps to keep the particles of the soil intact and not eroded
Answer:
c
Explanation:
Which of the following choices contains the most thermal energy?
a penny that is 20 degrees Celsius ( oC)
an atom of aluminum that is 20 degrees Celsius ( oC)
a 50 milliliter (ml) glass of water at 20 degrees Celsius ( oC)
a 900 milliliter (ml) pitcher of orange juice at 20 degrees Celsius ( oC)
Answer:
Honestly no idea
Explanation:
FOOOOOOOOD
What type of bond (Ionic, Covalent or Metallic) would be created when carbon bonds with bromine?
Answer:
Covalent bond
Explanation:
(pls give me brainliest) <3
Explain the relationship between protons and ionization energy
What mass of oxygen reacts with 12g of magnesium?
Answer:
24g
Explanation:
2×12=24
1mole of Mg react with 2 mooe of O2
help it's chemistry
Answer:
wavelength = wave velocity/frequency.
Explanation:
c
is a constant. It is usually given as
3.00
×
10
8
m/s or
3.00
×
10
10
cm/s rounded to three significant figures.
Wavelength is measured in meters, centimeters, nanometers, etc...).
Frequency has a unit of
1/s
which means
1
cycle per second. It is also given the unit Hertz (Hz) in honor of German physicist Heinrich Hertz who proved the existence of electromagnetic waves.
1
Hz
=
1/s
.
Can somebody help me with this??!
what are green boxes on periodic tables
Answer:
The basic metal ones?
Explanation:
...
2. A chemical reaction occurs when substances interact and their atoms
O A. disappear
B. change their size.
C. become new atoms.
O D. rearrange
Answer:Chemical reactions occur when chemical bonds between atoms are formed or broken. The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.
Explanation: