Answer these to get 75 points
Answer:
2. waves
3. True
4. the distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
5. Frequency is the number of occurrences of a repeating event per unit of time.
6. slow, fast
7. left to right
8. The maximum displacement or distance moved by a point on a vibrating body
9. No
10. radio waves, and microwave.
11. tv uses electromagentic waves while light uses electromagenti radition.
Explanation:
What is (3 X 10^3) +(2.5 X 10^6)? *
Answer:
Scientific Notation: 2.503 × 10⁶
Standard Form: 2,503,000
Hey there!
[tex]\mathsf{(3 \times 10^3) + (2.5 \times 10^6)}[/tex]
[tex]\mathsf{= 3 \times 10^3 + 2.5 \times10^6}[/tex]
[tex]\mathsf{10^3}[/tex]
[tex]\mathsf{= 10 \times 10 \times 10}[/tex]
[tex]\mathsf{= 100 \times 10}[/tex]
[tex]\mathsf{\bf = 1,000}[/tex]
[tex]\mathsf{10^6}[/tex]
[tex]\mathsf{= 10 \times 10 \times 10 \times 10 \times 10 \times 10}[/tex]
[tex]\mathsf{= 100 \times100 \times100}[/tex]
[tex]\mathsf{= 10,000\times100}[/tex]
[tex]\mathsf{= \bf 1,000,000}[/tex]
[tex]\mathsf{= 3\times 1,000 + 2.5 \times 1,000,000}[/tex]
[tex]\mathsf{3\times1,000}[/tex]
[tex]\mathsf{\bf = 3,000}[/tex]
[tex]\mathsf{2.5 \times 1,000,000}[/tex]
[tex]\mathsf{\bf = 2,500,000}[/tex]
[tex]\mathsf{3,000 + 2,500,000}[/tex]
[tex]\mathsf{= \bf 2,503,000}[/tex]
[tex]\boxed{\boxed{\large\textsf{Answer: } \mathsf{ \bf 2,503,000 \ or \ 2.503 \times 10^6}}}\huge\checkmark[/tex]
[tex]\large\textsf{Good luck on your assignment and enjoy your day!}[/tex]
~[tex]\frak{Amphitrite1040:)}[/tex]
as time goes on specimens in the fossil record become more
a-complex
b-common
c-confusing
d-simple
Answer:
complex
Explanation:
becaause it fits in the words equation I hoped i helped
What type of rock is made of dead plant/animal material?
Answer:
Sedimentary rocks
Explanation:
Sedimentary rocks are made of bits and pieces of rocks that have been eroded away, shells, and the remains of dead plants and animals. As larger rocks are exposed to the elements on Earth such as rain, wind, freezing, thawing, and plant roots growing, they are slowly worn away.
h) Given that the boiling point of substance X is around 105°C. Why can't we
use water bath to determine the boiling point of substance X?
Answer:
because the boiling point of water is 100°C the water bath would boil before the substance
In which reaction is there a transformation of mass into energy? For A P E X
A. Two hydrogen atom fuse to form a helium atom
B. Ammonium nitrate breaks down into dinitrogen monoxide and water
C. Calcium oxide combines with water to form calcium hydroxide
D. Sodium combines with chlorine to form sodium chloride
Helium is a colorless gas that does not react with other elements. Using what you know about valence electrons, which other elements would you expect to have similar properties as Helium? Explain.
Answer:
Neon, Argon, Krypton, Xenon and Radon
Explanation:
The other elements that would be expected to have similar properties as the Helium from the periodic table are the noble gases.
The noble gases are a special group of elements belonging to the last group of the periodic table.
They are called the O group or inert group because elements in this group do not combine with other atoms due to their completely filled outermost shell.
This makes them unreactive and do not readily combine with other atoms.
How do the properties of compounds compare to the properties of elements from which they are made
Answer:
When elements combine in a chemical reaction to form compounds, their individual identity is lost. Thus, the properties of elements change when they form chemical bonds with other elements to form compounds. For example, the compound water is made up of water and hydrogen.
What is oxydation number of s for H2S ? ( hydrogen sulphide )
Answer:
the oxidation number is zero because H=+1. S=-2
Explanation:
so two hydrogen and one sulphur so total no is zero
Please help me, Thank you!
The p_______ scale is a color coded scale that identifies acids and bases and neutral substances. Acids are 1-_____ and bases are 8-_____. Neutral substance are ____ like water.
Answer: The pH scale is a color coded scale that identifies acids and bases and neutral substances. Acids are 1-7 and bases are 8-14. Neutral substance are neutral like water.
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydrogen ion concentration.
The pH scale is a color coded scale that identifies acids and bases and neutral substances. The colours from yellow to red indicate an acidic solution, colours blue to violet indicate base and green colour indicates that a solution is neutral.
Acids have pH ranging from 1 to 6.9, bases have pH ranging from 7.1 to 14 and neutral solutions have pH equal to 7. Thus pH scale range from 1 to 14.
Water is neutral with a pH of 7.
An atom of carbon (C) forms covalent bonds with two atoms of oxygen (O) to form carbon dioxide. How are the valence electrons of these atoms rearranged to form the bonds?
Electrons are transferred from the carbon atom to the oxygen atoms.
Electrons are transferred from the oxygen atoms to the carbon atoms.
Many valence electrons are shared between the atoms.
A few valence electrons are shared between the atoms.
Answer:
Many valence electrons are shared between the atoms.
Explanation:
For the atoms to form a covalent bond, a many of the valence electrons are shared between the atoms.
When a covalent bond is to be formed, the valence electrons which are the outermost electrons are shared between the atoms that are combining.
Carbon is made up of 4 valence electrons. Oxygen is made up of 6 valence electronsFor both atoms to be isoelectronic with the noble gases, carbon shares all of its 4 electrons with oxygen. Oxygen bonds shares 4 electrons using two of its atom with the carbon.Answer:
c
Explanation:
on edge
Select the correct location on the image.
In pea plants, white seed coat is a recessive trait and gray seed coat is a dominant trait. Which offspring have a white seed coat?
Answer:
f2 4 answer. GG its right.
Explanation:
Answer:
hey the answer is in box f2 gg
Explanation:
What are the variables for this piston? temperature only temperature and volume pressure and number of molecules volume and number of molecules
Answer:
Option 2: temperature and volume
Explanation:
took the test
Temperature and volume are the variables for this piston.
What is a temperature?Temperature is a measure of hotness or coldness
The volume of a gas is directly proportional to its absolute temperature. More specifically, for a fixed mass of gas at constant pressure, the volume (V) is directly proportional to the absolute temperature (T).
This is Charles' Law. V = kT, where k is a proportionality constant.
Hence, temperature and volume are the variables for this piston.
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Explain why noble gases cannot participate in ionic bond formation.
Explanation:
Noble gases are odorless, colorless, nonflammable, and monotonic gases that have low chemical reactivity. The full valence electron shells of these atoms make noble gases extremely stable and unlikely to form chemical bonds because they have little tendency to gain or lose electrons. So, noble gases cannot participate in ionic bond formation.
Answer:
Because they can't!
Explanation:
For ionic bonds, ions are needed to be made which are made to form a stable outer shell octet of electrons of each atom to gain atomic stability. The noble gases don't need to form ions since they already have the octet of electrons in their outer shells. If they don't form ions, they don't form ionic bonds too.
This is one of the reasons why noble gases are unreactive.
#giveathanks
What causes lightning? (2 points)
a
Build up of electric charges in the clouds
b
Flow of electric charges among clouds
c
Light energy created in the clouds
d
Reflection of light by the clouds
Answer: As static charge builds up in a storm cloud, the electric field surrounding the cloud becomes ... plasma and the cloud discharges itself to the Earth through a lightning strike. ... These two mechanisms are believed to be the primary causes of the ... The contact point between ground charge and cloud charge rapidly ascends ...
Explanation:The updraft carries the super-cooled cloud droplets and very small ice crystals ... The differences in the movement of the precipitation cause collisions to occur. ... positively charged and the graupel becomes negatively charged (Figure 2). ... but important positive charge buildup near the bottom of the thunderstorm cloud due ...
Answer:
a
Explanation:
hi someone help me pls
Answer:
c
Explanation:
chemical change results from a chemical reaction where nothing is change example of chemical changes burning, cooking, rotting and rusting
Answer:
IM LOOKING FOR POINTSSSSS
Explanation:
PLS HELP
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A vehicle travels 60. km north and then 40. km south. What is its total displacements?
Answer:
20 km north that's the answer hope it helped
Explain why aluminium foil does not react with water and dilute acid
Answer:
When aluminum is placed in an acid it may initially appear not react. This is because a layer of aluminum oxide form on the surface of the aluminum due to prior reaction with the air and acts as a protective barrier ....Aluminum react with dilute acid to give aluminum chloride and hydrogen gas..
Suppose the innermost orbit an electron can occupy has an energy level of -19 eV. Based on the absorption spectrum shown below, what is the energy of energy level 4?
A. -2 eV
B. -8 eV
C. -11 eV
D. -13 eV
Answer:
It's B.
Explanation:
I got it wrong, it's B
6. Which example has BOTH ionic and covalent bonds? *
Answer:
It’s either A or D buttttt probably d
Explanation:
Calculate the empirical formula of each of the following substances with the following compositions.
a 3.60 g of magnesium and 10.65 g of chlorine
b 9.1 g of lithium and 10.4 g of oxygen
Explanation:
Note: Molar masses of elements can be found online or in the periodic table.
Moles of Magnesium
= 3.60g / (24.3g/mol) = 0.148mol.
Moles of Chlorine
= 10.65g / (35.45g/mol) = 0.300mol.
Mole ratio of Magnesium to Chlorine
= 0.148mol : 0.300mol = 1 : 2.
Hence we have the empirical formula MgCl2.
Moles of Lithium
= 9.1g / (6.94g/mol) = 1.311mol.
Moles of Oxygen
= 10.4g / (16g/mol) = 0.650mol.
Moles ratio of Lithium to Oxygen
= 1.311mol : 0.650mol = 2 : 1.
Hence we have the empirical formula Li2O.
Which of the following reactions is balanced?
A. caC12 + H2C03 2CaC03 + HCI
B. caC12 + caC03 + 2HCl
C. caC12 + 2H2C03 caC03 + HCI
D. 2caC12 + H2C03 cac03 + HCI
Answer:
B. CaCl₂ + H₂CO₃ → CaCO₃ + 2HC
Explanation:
A balanced reaction has the same number of atoms in the both sides of the reaction. In the options:
A. CaCl₂ + H₂CO₃ → 2CaCO₃ + HCI
In this reaction there is 1 Ca in reactants and 2 in products -The reaction is unbalanced-
B. CaCl₂ + H₂CO₃ → CaCO₃ + 2HCl
There is 1 Ca is both sides, 2Cl, 2H, 1C and 3 Oxygens -The reaction is balanced
C. CaCl₂ + 2H₂CO₃ → CaCO₃ + HCI
There is 1 Ca in both sides but 2Cl in reactants and 1 in Cl -The reaction is unbalanced-
D. 2CaCl₂ + H₂CO₃ →CaCO₃ + HCI
There are 2 Ca in reactants and 1 in Ca -The reaction is unbalanced-
I have a project and I need help with a diagram. What do the moon, sun, and earth look like at night in the Americas? (diagram)
Answer: Hope This Helps
Explanation:
What does the slope of a distance versus time graph represent?
Total time
Average time
Average distance
Speed
Answer:
Speed
Explanation:
Motion can be represented by a distance-time graph, which plots distance on the y-axis and time on the x-axis. The slope of a distance-time graph represents speed. The steeper the slope is, the faster the speed.
Hope this helps!:)
What is the name of the piece of paper at the end of a chromatography experiment?
Answer:
There are two phases involved in chromatography; the 'stationary phase', in this case the paper, and the 'mobile phase', the salt solution. Sort the 'Smarties' into piles of the same colour.
Explanation:
___ organisms only need one cycle of cell division to create offspring
Answer:
asexual organisms because they
self reproduce by fissure division instead of meiosis
CO2 + H20 ----> C6H1206 + 02
*
14. What are the reactants of the reaction?
Explanation:
[tex]CO _{2} \: and \: H _{2} O[/tex]
Reactants must be on the left hand side of the reaction
Why it is necessary for plants to have chloroplasts?
In your own words, please
Chloroplasts is an important part in the process of photosynthesis in some organisms. The chloroplast absorbs the energy in sunlight and uses it to produce sugars.
The main function of chloroplast in plants is to convert light energy into chemical energy via the photosynthesis process.
What is the role of chloroplasts in plants?Photosynthetic chlorophyll is found in chloroplasts, which catch sunlight and converts it into chemical energy, releasing oxygen from water. All green plants and algae have chloroplasts. Chloroplasts help plants in the formation of food.
Chloroplasts are found in the leaves of the plant's guard cells. Chloroplasts contain a lot of chlorophyll, which helps to trap sunlight. The chloroplast is capable of reproducing without any help from the rest of the cell.
The primary job of chloroplast is to produce food through the photosynthesis process. Chloroplast has a component called chlorophyll, which traps sunlight and is used for food synthesis or sugar and other organic molecules in all green plants. They also form lipid components and amino acids that are required for chloroplast membranes.
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How many strawberries would you need to make 12 smoothies?
Answer: Hey! You need 48 Strawberries to make 12 smoothies.
Explanation: I knew this before but needed to make sure if it's true. So I tested it by myself and got it!
You are very welcome!
You need 84 strawberries to make 12 smoothies.
What is multiplication?Multiplication is a mathematical arithmetic operation. It is also a process of adding the same types of expression for some number of times.
Example - 2 × 3 means 2 is added three times, or 3 is added 2 times.
Given:
Martha needs 28 strawberries to make 4 smoothies.
To make one smoothie,
Martha needs = 28/4 = 7 strawberries.
To make 12 smoothies,
Martha needs = 12 x 7
= 84 strawberries.
Therefore, you need 84 strawberries.
To learn more about the multiplication;
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The complete question:
Martha needs 28 strawberries to make 4 smoothies.
How many strawberries would Martha need to make 12 smoothies?
