The speed of a wave can be calculated using this formula:
v = f x λ
Where:
v is the wave speed in metres per second, m/s
f is the frequency in hertz, Hz
λ (lambda) is the wavelength in metres, m
Calculation:
Given:
f = 20 Hz
λ = 100m
Using the equation:
v = f x λ
v = 20 x 100
v = 2000 m/s
Therfore, the speed of the wave is 2000 m/s
A sound wave has a wavelength of 100 m and a frequency of 20 Hz. The wave's speed is 2× 10^3 m/s.
assuming frequency = 20 Hz and wavelength = 100 m
utilized concept: v= = 20×100 = 2×10³ m/s
Why is frequency important?The frequency in physics is the quantity of waves passing a fixed location in a unit of time. It also indicates how many cycles or vibrations a body in periodic motion experiences in a given unit of time.
How would you define sound?A sort of energy created by vibrations is sound. The molecules of the air surrounding an item vibrate as a result.. These molecules vibrate because they collide with nearby molecules, which also vibrate as a result.
To know more about Frequency, visit-
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Q7. Pb + O2 PbO2
Is this combustion, single replacement, double replacement, synthesis, or decomposition
Answer:
This is a synthesis reaction.
Explanation:
Two elements are bonded together to form (synthesize) a new compound.
mL? PLEASEEE HELP
What is the answer
40 POINTS!! Choose all the answers that apply.
Light _____.
travels in longitudinal waves
does not require a medium to travel through
slows down when traveling through more dense substances
speeds up when traveling through less dense substances
can be absorbed and transformed into heat
is refracted when it changes direction and speed
Answer:
The correct answers are:
does not require a medium to travel through
can be absorbed and transformed into heat
is refracted when it changes direction and speed
Hope this helps, have a great day and stay safe! :) :D :3
Answer:
B,E, and F
Explanation:
does not require a medium to travel through
can be absorbed and transformed into heat
is refracted when it changes direction and speed
TRUST : )
Help me please
Chemical energy is a form of_______ energy
A. heat
B. kinetic
C. potential
D. electromagnetic
Answer:
potential
............
Answer:
Chemical energy is a form of potential energy.
Define a force.......
Answer:
Gravitational Force.
Gravitation is the agent that gives weight to objects with mass and causes them to fall on the ground when dropped.
Answer:
A force is the strength or energy as an attribute of physical action or movement.
Explanation:
In smaller words, a force is a form of energy caused from a push or a pull on an object. A force happens when two objects interact with each other. For example, when you throw a ball you are using force.
Hopefully this helps im sorry if i got it wrong im kinda dumb... XD
ASAP PLEASE HELP!!
Which substances will make a salt when combined?
A: Vinegar and Tea
B: soda and wine
C: soda and ammonia
D: fertilizer and detergent
Xx thank you! :)
Answer:
c
Explanation:
A team of geologist learn from GPS data that too continents can I have an ocean between them are moving toward each other Diego‘s little brother hears this and cannot believe that continents can move and is worried that those two continents are going to run into each other how can you explain to him what's happening
Answer:
Kindly check explanation section.
[tectonic activity].
Explanation:
What the team of geologists were talking about is known as the continental drift. The term continental drift which was introduced in the 1500s by people like Abraham Ortelius was mot accepted because the reasons backing it were not sufficient enough. The work on Continental drift was also worked on by people like Charles Lyell, Alfred Russel and Wegener. The term continental shift is used by geologists and other scientists to explain the movement of continents over time. The movement of continents is actually the movement on tectonic plates.
Although the movement of continents has not been accepted generally in those times, there has been modern evidence to back it up such as the record on fossils found in in several continents which are similar.
Diego‘s little brother should be told that different continents move at different rate and the movement is on the tectonic plates.
HELPPP MEE I NEED HELPP PLEASE
Which person participates mostly in the quaternary level of an economy?
A. A coal miner
3. A car mechanie
C. A college professor
D. A car factory worker
SUBMIT
Answer:
B.Michanine
Explanation:
Answer: The answer is a college professor since people in the fourth level of industry create, share, and store information. They do research, give advice, report on events, and keep records. Furthermore, workers in the quaternary include teachers, librarians, accountants, scientists, and reporters, nor do the traits describe coal miners, car machines, and a car factory worker as these are the secondary level since their work involves manufacturing, make sure to study! You got this have a g’day. Again, the answer is C: A college professor.
Explanation:
Question 8 (3 points)
Cindy dropped a test tube during a lab in science class, spilling its contents on the
floor. She immediately picked up the broken glass and used paper towels to clean up
the spill before redoing her lab.
How should she have handled the clean up?
Answer: she should‘ve called the teacher over to deal with it because she could have gotten cut and the chemical could’ve been dangerous
Explanation:
Can an Atom be broken down into a smaller substance? Yes or No Explain.
Answer:
Yes
Explanation:
A atom is made out of 3 elements, protons which are positive charges, electrons which are negative charges that swirl around the atom, and a neutron with a neutral charge. The nucleus of the atom is basically the center of the atom.
Differences in states of matter are determined by
particle type
particle arrangement
particle color
distance between particles
Answer:
particle distance
solids are tightly packed
liquids are a little farther apart
and gases are very far
3. Which phase change requires the removal of energy? *
(1 Point)
condensation
evaporation
melting
sublimation
answer quick pls
Answer:
I'm pretty sure its condensation The energy absorbed causes the molecules to change patterns. hope i helped
A neutral atom has 37 electrons. How many protons does the
atom have?
Answer:
37
Explanation:
because when an element is neutral it contains thesame amount of protons and electrons.
The number of protons in the given neutral atom is 37.
Explanation:
Atom is made up of three subatomic particles: protons, electrons, and neutrons.Protons are positively charged, electrons are negatively charged and neutron has no charge.Atom is electrically neutral as it contains an equal number of electrons and protons.The atomic number of an atom is equal to the number of protons in an atom.The mass of the atom is equal to the sum of the number of protons and the number of neutrons.Given:
A neutral atom with 37 electrons
To find:
The number of protons.
Solution:
Number of electrons = 37
The given atom is neutral, which means that an equal number of protons and electrons are present.
Number of protons = 37
The number of protons in the given neutral atom is 37.
Learn more about subatomic particles here:
brainly.com/question/1371394?referrer=searchResults
brainly.com/question/2099804?referrer=searchResults
An atom can have 2.5 protons, as long as it also has 2.5
electrons.
TRUE. Or
FALSE
What is the mass of 1.2 mol IrI3?
Answer:
690 g IrI₃
Explanation:
To convert from moles to grams, you have to use the molar mass of the compound. The molar mass of IrI₃ is 572.92 g/mol. You use this as the unit converter in this equation:
[tex]1.2molIrI3 * \frac{572.92g}{1mol} = 687.504 g IrI3[/tex]
Round to the lowest number of significant figures which is 2 to get 690 g IrI₃.
Which element am I? Give my symbol ONLY! What a robber says as he's running away!
Answer:
ummmmmmmmmmmmmmmm..mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
Explanation:
ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm.................... candyunicorns1999 has left the chat
Answer:
Bi
Explanation:
How could measuring the melting point of a solid help decide whether it was a mixture or a compound?
Answer: It can't.
Explanation:
In most cases, the melting point alone will not enable you to identify a compound. Millions of solid organic compounds, and their melting points, are known. Perhaps 10,000 of these will have the same melting point as your unknown compound.
Hope this helps!
Calculate the number of moles of neon gas in 8.15 x 10^24 atoms of neon gas.
1.35 moles Ne
0.135 moles Ne
135 moles Ne
13.5 moles Ne
Answer:
13.5 moles of Ne
Explanation:
1 mole of any gas contains 6.02 x 10²³ atoms of gas
6.02 x 10²³ atoms of neon is equal to 1 mole of neon .
8.15 x 10²⁴ atoms of neon is equal to 1 x 8.15 x 10²⁴ / 6.02 x 10²³ moles
= 8.15 x 10²⁴ / 6.02 x 10²³ mole o neon
= 13.5 moles of Ne .
a piece of metal has a mass of 1.3 g/cm and a has a volume of 24.9 cm3 what is its mass
Answer:
34.611g
Explanation:
mass of metal = ?
density of metal = 1.39/cm³
volume = 24.9 cm³
density = mass/volume
mass = density × volume
= 1.39g/cm³ × 24.9 cm³
= 34.611g
The gravitational attraction between two objects is determined by the mass of the two objects and the:
A. Distance between the objects
B. Weight of the objects
C. Diameter of the objects
D. Density of the objects
Answer:
A. Distance between the objects
Explanation:
The gravitational attraction between two objects is determined by the mass of the two objects and the distance between the two objects.
According to Newton's law of universal gravitation:
"the gravitational force of attraction between two bodies is directly proportional to the product of the their masses and inversely proportional to the square of the distance between them".
F = [tex]\frac{Gm_{1}m_{2} }{r^{2} }[/tex]
F is the gravitational attraction
G is the universal gravitation constant
m is the mass
r is the distance
We can see that the gravitational attraction depends on the mass of the bodies and the distance between them.
HELP QUICK The dichotomous key was created with questions about permanent
physical characteristics.Each question in the dichotomous key has only ____ answer choices. The answer choices can be answered only with_________.
Answer:
The dichotomous key was created with questions about permanent
physical characteristics.
Explanation:
Answer:
permanent, two, yes or no
Explanation:
An air-filled balloon shrank when moved from a warm room to a refrigerator. Which statement BEST explains why the balloon shrank?
A. The mass of the air decreased as the balloon cooled.
B. Internal pressure of the balloon decreased due to lower kinetic energy.
C. The volume of air decreased as the number of particles decreased.
D. External pressure on the balloon increased due to lower temperature.
Answer:
B. Internal pressure of the balloon decreased due to lower kinetic energy.
Explanation:
The balloon shrank when moved from the warm room to the cold refrigerator because the internal pressures of the balloon decreased due to lower kinetic energy.
As the balloon approaches the refrigerator, the particles begins to lose their heat energy. The kinetic energy of the particles in a body is directly proportional to the amount of heat. Since we move from a warm to a cold place, the kinetic energy drops too.what is a limitation of using a chemical formula, such as C6H12O6, to represent a compound?
A.The chemical formula does not show the types of elements that make up the compound.
B.The chemical formula does not show how the atoms are connected to one another.
C.The chemical formula does not show the number of atoms of each element in a molecule.
D.The chemical formula does not show the chemical symbols of the elements in the compound.
Answer:
B
The chemical formula does not show how the atoms are connected to one another
Answer:
b
Explanation:
edge 2020
Calculate 6890/1230000 and conclude using the correct scientific figure.
Answer:
5.60162×10^−3
pls help ill mark as brainliest
Q8. Na2CO3 Na2O + CO2
is this combustion, synthesis, single replacement, double replacement, or decomposition ?
Answer:
Decomposition
Explanation:
First, you have one compound, then they break up, or decompose, into two compounds.
Classify the following chemical reaction
3 C + 4H2→ C3 H8
Answer:
Synthesis Reaction
General Formulas and Concepts:
Synthesis Reactions: A + B → AB
Decomposition Reactions: AB → A + B
Single-Replacement Reactions: A + BC → AB + C
Double-Replacement Reactions: AB + CD → AD + BC
Explanation:
Step 1: RxN
3C (s) + 4H₂ (g) → C₃H₈ (s)
We see here that we are combining 2 elements to form a compound.A would be C, B would be H₂, and C₃H₈ would be ABTherefore, we have a Synthesis ReactionTrue or False: The isotope with the greatest
abundance contributes to the atomic mass
reported on the periodic table more than
the isotope of lower abundance.
Answer:
True
Explanation:
Greater abundance means there is more of those isotopes, so they contribute to the average number more. The average number is the atomic mass.
How many moles are there in 7.4 X 1023 molecules of AgNO3?
NEEEDDDD HELP ASAP PLZ PLZ PLZ PLZ PLZ HELP ME
Answer:
[tex]ns^2[/tex]
Explanation:
at what temperature does a solid turn into a liquid
Answer:
0°C
Hope this helps Do mark as brainliestAnswer:
a little over 0 degrease cel
Explanation:
