Answer: A mechanical wave is a disturbance in matter that transfers energy through the matter. A mechanical wave starts when matter is disturbed. A source of energy is needed to disturb matter and start a mechanical wave.
Waves can be given as energy transmission without the net movement of the particles in the medium. The statement for the mechanical wave disturbs the matter is true.
What are the types of waves?The waves can be differentiated as mechanical, electromagnetic, and matter waves.
The mechanical waves can be described as the waves which are not able to transmit is the energy in the vacuum. Thus, the waves required a matter medium for the propagation of the energy.
The matter propagation results in the disturbance in the matter. Thus, the statement for the mechanical wave has been true.
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Which statement does NOT correctly compare silicon with another element?
o Silicon is a better conductor of electricity than sulfur.
Silicon conducts electricity as well as copper does
Silicon is a solid at room temperature, but argon is a gas.
Silicon is less malleable than silver.
Answer:
the second choice
Explanation:
silicon is a semiconductor, so it does not conduct electricity as well.as copper
The statement, Silicon conducts electricity, as well as copper, does not correct compare the two elements.
Silicon is a colorless, odorless, and stable element. It can act as both a conductor and insulator. Silicon can conduct electricity up to a certain extent. Sulfur is able to conduct less electricity. Thus as compared to sulfur, silicon is a better conductor of electricity.
Copper is said to be among the best conductor of electricity. Compared to copper, silicon is not a conductor of electricity and works as an insulator.
Silicon is present in solid state at room temperature, while argon is present as gas at room temperature.
Silicon having a weak force of attractions is less malleable than silver.
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Convert 1.350 atm into mmHg
Answer:
1026
Explanation:
Pressure
1.35
Standard atmosphere
=
1026
Millimetre of mercury
Formula
multiply the pressure value by 760
Answer:
multiply the pressure value by 760
the following isotope has
In addition to hot surface temperatures, which characteristic makes Mercury different from Earth?
A. Mercury has rings.
B. Mercury has no moon.
C. Mercury has slow revolutions.
D. Mercury has an atmosphere of carbon dioxide.
HURRY PLS ITS AN EXAM AND ITS TIMING ME
Answer:
Mercury has no moon, too close to the sun
Explanation:
Mercury has no moon which makes it different from earth.
Difference between mercury and earth.The earth has moon but mercury does not.The percentage of carbon dioxide present in atmosphere of mercury is greater than the earth.The mercury has slow revolution as compare to the earth.The mean temperature of mercury is greater than the earth.To learn more about Earth here.
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Earth's gravitational potential energy: GPE = mgh = Gravity (9.81m/s2)
Mass (kg) x Height (m)
Kinetic energy: KE=
- 2 mu?
How would you calculate the gravitational potential energy of a 2 kg bottle of
soda falling off of a kitchen table that is 0.76 m tall?
A.
(2) 0.76)
9.8
O B. 20.76)(2)
O c. 120762)
D. (2)(0.76)9.8
Answer:
(2)×(9.8)×(0.76)
Explanation:
Given data:
Mass of bottle = 2 kg
Given height = 0.76 m
Gravitational potential energy of bottle = ?
Solution:
Formula:
Gravitational potential energy = mgh
g = 9.8 m/s²
Now we will put the values in formula.
Gravitational potential energy = 2kg×9.8 m/s²×0.76 m
Gravitational potential energy = 14.896 kg.m².s⁻²
j = kg.m².s⁻²
Gravitational potential energy = 14.896 j
Question 9 of 10
What type of force slows down a skydiver?
A. Gravity
B. Friction
C. Air resistance
O D. Magnetic force
Answer:
C air resistance is the answer
The atomic number, or _____ number, is the described as the number of _____ in the nucleus of an chemical element.
Answer:
proton number
protons
Explanation:
Answer:
Proton, protons
Explanation:
The atomic number, or proton number is described as the number of protons in the nucleus of an chemical element. Electrons change on the atom/ion and neutrons change in the isotopes but the number of protons always stays the same and is considered a unique atom identifier.
A. How well do the continents fit together?L
I
2. Matter can be described and classified by its observable properties. One property of solids, liquids, and gasses is they all have volume. Which statement best defines the volume of an object?
A. The amount of space that matter occupies
B. The amount of matter in an object
C. The measure of the force of gravity on an object
D. The number of grams in one cubic centimeter
3.When matter changes from a solid to liquid or from liquid to gas, what kind of change takes place?
A.Chemical change
B. Physical change
C. Thermal change
D. Energy change
4. Darius tears a page of newspaper into pieces to start a campfire. What kind of changes taking place as the paper is torn?
A. A change in matter
B. A change in the substance
C. A change in physical property
D. A change in chemical property
5. Mina is attending cooking school, where she prepares a different mixtures of ingredients. She works with homogenous and homogenous mixtures. Today she is using honey and salsa. What kind of mixtures are these ingredients?
A.Neither is a mixture.
B. They’re both homogenous
C. One is homogenous and the other is heterogeneous.
D. They are both heterogeneous.
When a substance has large or strongly extracted particles, they do not flow freely. For example, water flows very quickly compared to honey. Which property of liquids does the example illustrate?
A. Surface tension
B. viscosity
C. Amorphousness
D. Crystallinity
Volume is amount of space that matter occupies ,when matter changes from solid to liquid to gas, physical change takes place,tearing of paper is change in physical property ,honey is homogenous and salsa is heterogenous ,property of liquid which is described is viscosity.
What are physical changes?
Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.
Physical changes are always reversible using physical means and involve a change in the physical properties.Examples of physical changes include melting,boiling , change in texture, size,color,volume and density.Magnetism, crystallization, formation of alloys are all reversible and hence physical changes.
They involve only rearrangement of atoms and are often characterized to be changes which are reversible.
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Does a hypothesis need to be correct for an experiment to be a success? Explain why or why not?
Answer:
No it does not need to be correct to be a success. It would just need to be reasonable and possible for you to do so that you dont hypothesize that animals are actually human because that is unlogical and impossible
Explanation:
Answer:
No, of course not.
Explanation:
The goal of a hypothesis is for the researchers to determine whether or not they accurately guessed what would happen in their experiment. The fact that the hypothesis was right or wrong has no effect other than if the researchers had a correct educated guess.
An atom emits a photon with energy 7.13 electronvolts (eV). What is the wavelength of the photon?
a. 279 nm
b. 174 nm
c. 114 nm
d. 108 nm
Answer:
Option (b) "174 nm"
Explanation:
Energy of emitted photon is 7.13 eV.
We need to find the wavelength of the photon.
1 eV = 1.6 × 10⁻¹⁹ J
Energy of a photon is given by :
[tex]E=\dfrac{hc}{\lambda}[/tex]
Where, [tex]\lambda[/tex] is wavelength of the photon
Putting all the values,
[tex]\lambda=\dfrac{hc}{E}\\\\\lambda=\dfrac{6.63\times 10^{-34}\times 3\times 10^8}{7.13\times 1.6\times 10^{-19}}\\\\\lambda=1.74\times 10^{-7}\ m\\\\\text{or}\\\\\lambda=174\ nm[/tex]
So, the wavelength of the photon is 174 nm.
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The dependent variable is the variable that is measured during an experiment and can also be seen as the “data.”
A. True
B. False
Answer:
A
Explanation: because it change as so do ur data
Answer:
True
Explanation:
given 1kg= 2.20 lbs, how many kilograms are in 338 kg
Answer:
154
Explanation:
Cooperative relationships occur between
O A. members of different species
O B. members of the same species
O C. members of any species that live together
Answer:
B MEMBERS OF THE SAME SPECIES
I HAVE NO EXPLANATION BECAUSE THIS IS EASY
Explain the four basic types of chemical reactions. Be sure to include a sample equation for each type. Describe how rate relationships and activation energy are important in chemical reactions.
If we have only one globe with a sun, which two seasons can it be?
FALL AND WINTER
Answer:
is it fall and winter................
Explanation:
Hello please help ty
Answer:
C
B
D
A
Could I please have BRAINLIEST.
I have a mixture of rocks,
sand, and water. I pass it
through a screen. What is left
on top of the screen and what
has fallen through the screen?
The Rocks have remained on top of the screen, while the sand and water have passed through it.
A metal block with a temperature of 30°C is placed inside a bowl of water with a temperature of 45°C. Which of the following will occur when the metal block is placed inside the Bowl water?
Answer: The water will cool down
Explanation:
Both the water and the metal block will reach Thermal equilibrium which is a state where neither of them will be transferring energy (heat) to the other because they are now of the same temperature.
For instance, if you put a cold can in water to warm it up, the water will keep reducing in temperature while the cold can increases in temperature until both the can and the water have the same temperature.
The same logic applies here. The metal block is cooler than the water so the water will cool down and the metal block will get more heat until both of them achieve a temperature somewhere between the temperatures that both the water and the block started off with.
Which material will heat the fastest?
Answer:
Lead
Explanation:
Lower the specific heat faster it will heat, meaning liquid will heat up slowly than any other material mentioned above. Thus lead will heat up faster
An organized process used to gather observations and test a hypothesis is an)
a. a problem
b. experiment
C. exercise
d. constant
Answer:
B experiment
Explanation:
At a school carnival, Suki watch the clown fill balloons from a metal tank of helium gas she never knew that helium balloons could be filled from a tank light days. She had no clue that gases could be held in a tank, she's only seen gas and balloons. Which property of the helium gas changes as it moves into the balloon?
A. Color
B. Mass
C. Smell
D. Volume
Answer:
b
Explanation:
Is this right?
Can you please help
Thanks
Answer:
yes, I think
Explanation:
Which of the following would not be classified as a result of climate change?
A. Expanding glaciers
B. Increased droughts
C. Extreme weather
D. Rising sea levels
Answer:
all
Explanation:
because they all are someone related to climate change
Answer:
your awnser would be expanding glaciers.
Explanation:
have a nice day hope this helps
Identify the difference between natural and artificial dyes.
How far is one nautical mile?
The negatively-charged particle without a real mass that exists outside the nucleus
Electrons should be your answer!
An ionic bond is a bond between a Cation (Metal) and an Anion (nonmetal)
True
False
How/when is gold used
Answer:
Gold has been used to make ornamental objects and jewelry for thousands of years. Gold nuggets found in a stream are very easy to work and were probably one of the first metals used by humans. Today, most of the gold that is newly mined or recycled is used in the manufacture of jewelry.
2) In science there are fundamental units and derived units. Derived units are arrived at by combining
two or more fundamental units in some way. Which ONE of the following is a derived unit?
A) Meter
b) second
C) Kelvin
D) g/cm3
