Answer:
D
Explanation:
Secondary earthquake waves is a seismic wave that can travel through solid but cannot travel through liquid and gas.
This wave is one of the fastest traveling seismic waves.
While sound wave can travel through both solid and liquid and even gas.
Therefore, the statement that compares how secondary earthquake waves and soundwaves move is:
Sound waves can move through liquids, but secondary earthquake waves cannot.
The best answer is therefore D
A body is moving with a uniform acceleration of 2 m/s2. What does it mean?
Answer:
it means the velocity is changing.
the rate of change of velocity is acceleration
so it means the body is accelerated at 2m/s^2
It means that the body is moving, and getting faster and faster. At any time, it's moving 2 m/s faster than it was moving 1 second earlier.
Which of the following statements is true?
A. Musical Instruments are grouped by the wavelengths they produce.
B. Musical Instruments are grouped by what they are made of.
C. Musical Instruments are grouped by their frequency.
D. Musical Instruments are grouped by how they produce pitch.
Answer:
Musical instruments are grouped by how they produce the pitch.
Pitch is the highness or lowness of a tone.
Explanation:
:)
what do you understand by mechanical advantage of a simple machine is 4 ?
Answer:
hope it helps you:)
Explanation:
mark me brainliest
What does an atomic number represent in an atom?
number of protons
number of electrons
number of neutrons
number of protons and neutrons
The number of protons in an atom is known as the atomic number
Answer:
Number of protons
Explanation:
It is denoted by the letter Z
Please help need the answer asap
34=x2 - 4(7 + 82)
Answer:
x² - 4 ( 7 + 82 ) = 34
x² - 28 - 328 = 34
x² = 34 + 28 + 328
x² = 390
x = √390
Explanation:
Predict the speed of a car after 10.0 s when the car’s speed follows
the relationship speed = (4.8 m/s2 ) × (time).
Answer:
48 m/s
Explanation:
The time is 10 seconds
The speed of the car after 10 seconds when the relationship is 4.8 m/s^2 × time can be calculated as follows
= 4.8 × 10
= 48
Hence the speed is 48 m/s
If this wave has frequency of 15 hz. what is the wavelength of that wave ?
If this wave has a frequency of 15 Hz then the wavelength of the wave would be 2 ×10⁷ m
What is Wavelength?It can be explained in terms of the separation between any two similar successive points on a wave, such as how the wavelength can be determined by calculating the separation between any two successive crests.
According to the following relation, the wavelength and wave frequency are inversely proportional.
C = νλ
Where c is the speed of light and v is the wave's frequency and λ
is the wave's wavelength.
As given in the problem If this wave has a frequency of 15 hz.
As we know C = νλ
by substituting the value of the frequency in the given formula
C = 3×10⁸ m/s
3×10⁸ = 15 ×λ
λ = 3×10⁸/ 15
= 2 ×10⁷ m
Thus, If this wave has a frequency of 15 Hz then the wavelength of the wave would be 2 ×10⁷ m
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Does guardians of the galaxy have multiple endings.
Answer: no I watch both of them
Explanation:
Lemonade is best described as _______.
A. an element
B. a compound
C. a pure substance
D. a mixture
Lemonade is best described as __________.
D. a mixture
refrigertor doors use the ________ property of magnets
Answer:
Attraction property of magnets!
Explanation:
Good luck on your test or question :)
How is the initial kinetic energy related to the final kinetic energy in an elastic collision?
the initial kinetic energy is equal to the final kinetic energy
Joyce and Efua are skating. Joyce pushes Efua, whose mass is 40.0 kg, with a force of 5.00 N. What is Efua’s resulting acceleration?
Answer:
[tex]a=0.125\ m/s^2[/tex]
Explanation:
Given that,
Mass, m = 40 kg
The net force with which Joyce pushes Efua is 5 N.
We need to find Efua’s resulting acceleration. Let it is equal to a. Net force is given by :
F = ma
[tex]a=\dfrac{F}{m}\\\\a=\dfrac{5\ N}{40\ kg}\\\\a=0.125\ m/s^2[/tex]
So, the acceleration is [tex]0.125\ m/s^2[/tex].
The resulting acceleration of Efua is [tex]0.125 \;\rm m/s^{2}[/tex].
Given data:
The mass of Efua is, m = 40.0 kg.
The magnitude of applied force by Joyce is, F = 5.00 N.
The given problem is based on the Newton's Second law of motion. As per the Newton's second law, the applied force is equal to the product of mass and the acceleration of object. Therefore,
F = ma
a = F/m
Solving as,
a = 5.00 / 40
[tex]a = 0.125 \;\rm m/s^{2}[/tex]
Thus, we can conclude that the resulting acceleration of Efua is [tex]0.125 \;\rm m/s^{2}[/tex].
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A car is moving down the street at 53km/h. A child suddenly runs into the street. If it takes the driver 0.75 sec to react and apply the brakes, how many meters will the car have moved before it begins to slow down? ANSWER IN METERS
Answer:
11.04m
Explanation:
Convert kilometers to meters: 53km/h x 1000 = 53,000m/h
Convert hours to seconds: 53m/h / 3600 =14.72m/s
14.72 (.75) = 11.04
defend the use of renewable or non renewable resources. help please will give brainliest
Answer:
Renewable sources are better because they don't damage the environment. As of now, there is a r=lot of damage already done to the environment thanks to non-renewable resources, and soon a lot of this damage will be irreversible. Another good thing about renewable resources is that that it is unlimited, this means that it is a steady source of energy and items.
Non renewable resources are good for the economy. People are so used to using non renewable resources that they might not want to switch over to renewable resources. People will keep buying these product so it is a steady item to invest in and profit off of. Non renewable resources also have a lot more research on them and people have found multiple different ways to utilize it so people might like it more.
Suppose you push on a heavy crate, but not hard enough to make it slide. Does a friction force act on the crate?
a.No, the friction force doesn't act.
b.Yes, opposite to your push, just enough so that F = 0.
The net force is 0 because the friction force counteracts or counterbalances the force you apply, which is why the object does not move. Specifically the static friction is holding the object in place and keeping the object static.
Once you apply enough force and overcome that static friction, then the object will move and you'll be dealing with dynamic friction. Dynamic friction is what still holds the object back somewhat and allows the object to slow down and eventually stop (when the force you apply isn't enough anymore).
Without dynamic friction, the object would slide forever until it hit the wall. With something like slippery ice, there is dynamic friction but it's not as large compared to other surfaces.
Please help me I’ll mark you Brainly!!
QUICK
Answer:
A
Explanation:
The motion of the wheelbarrow is going straight, so the wheelbarrow accelerates faster. Since it doesn't say about moving the motion onto its side, it's A.
Complete the sentence using word balanced, normal or tension.
Equal and opposite forces that act on the same object are called____
forces?
Financial statements provide information to the public. True of False
Answer:
False
Explanation:
they just what they spent money on and thats not all of it
What is the Quantum Theory?
Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level. The nature and behavior of matter and energy at that level is sometimes referred to as quantum physics and quantum mechanics.
I LOVE THE Quantum Theory
Hope this helps!
which equation correctly represents the gravitational potential energy of a system?
Answer:ME= 1\2mv^2 + mgh
Explanation: I hope this helped.
The correctly represents the gravitational potential energy of a system is = - ΣGM₁M₂/R. Negative sign appears as gravitational force is attractive force.
What is potential energy?Potential energy is a form of stored energy that is dependent on the relationship between different system components. When a spring is compressed or stretched, its potential energy increases.
If a steel ball is raised above the ground as opposed to falling to the ground, it has more potential energy. It is capable of performing more work when raised.
Potential energy is a characteristic of systems rather than of particular bodies or particles; for instance, the system made up of Earth and the elevated ball has more potential energy as they become further apart.
Potential energy of a system of particles can be represented as summation of individual's potential energy. Hence, the correctly represents the gravitational potential energy of a system is = - ΣGM₁M₂/R.
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Becky has 55 Oreos. She gives her friend some and is left with 13 Oreos. How many Oreos did Becky give to her friend?
Answer:
Becky gave her friend 42 Oreos
Explanation:
55-13=42
Answer:
42
Explanation: 55-13 = 42
PLEASE HELP!! I WILL GIVE you 20+ brainly
A certain space heater that is connected across 220 V and dissipates 1477 W of power in the form of electromagnetic radiation. What is the resistance of the heater?
Hi there!
We can use the power equation:
[tex]P = \frac{V^2}{R}[/tex]
P = Power (W)
V = Potential Difference (V)
R = Resistance (Ω)
Rearrange to solve for Resistance:
[tex]R = \frac{V^2}{P} = \frac{220^2}{1477} = \boxed{32.769 \Omega}[/tex]
which two forms of energy travel in waves
Answer: Electromagnetism and sound
If a star were located exactly at each celestial pole, the corrected altitude of the star would equal __________.
Answer:
the observer's latitude
Explanation:
the observer's latitude
The force pulling the moon toward Earth depends on the mass of the two bodies and which factor?.
The more __________ energy being used, the ___________ the roller coaster will go. Question
A:Kinetic, slower
B:Potential, faster
C:Kinetic, faster
D:Potential, slower
Answer: b
Explanation:
Answer:
C.
The More Kinetic Energy being used, the Faster, the Roller Coaster will go.
Explanation:
Hope i helped you :)
how much work is required to increase a velocity of 4kg object by 8m/s?
Answer:
4kg=4000,8m=60 times 8 =480
4000 times 480 over 100 =19200
Starting from rest, a car takes 2.4s to travel 15m. Assuming a constant acceleration, how long will it take the car to travel the next 15m?
Answer:
T = 2.4 + 2.4 = 4.8 [s]
Explanation:
In order to solve this problem, we must use the following kinematics equation and calculate the acceleration value.
[tex]x=x_{o} +v_{o}*t+(\frac{1}{2})*a*t^{2}[/tex]
Vo = inital velocity = 0
x - xo = 15 [m]
t = time = 2.4 [s]
15 = 0.5*a*(2.4)^2
a = 5.208 [m/s^2]
We can use the same equation to find the time.
30 = 15 + 0.5*(5.208)*t^2
t = 2.4 [s]
T = 2.4 + 2.4 = 4.8 [s]
What is the charge of an element that has 5 protons and 7 electrons?
Answer:
atom with a neutral charge is one where the number of electrons is equal to the atomic number. Ions are atoms with extra electrons or missing electrons. When you are missing an electron or two, you have a positive charge. When you have an extra electron or two, you have a negative charge.
Explanation:
When the amount of electrons in an atom is the same as the atomic number, the atom has a neutral charge. Particles with extra protons or missing electrons are known as ions.
Where is the electron?Electrons are present outside the electron shell, in contrast to nucleons, which are contained inside the core at its center. Neg electrons are drawn to a positive nucleus so because excitons of opposite polarity attract one another. The total energy of an electron is inversely proportional to the intensity at which the electrons wave equation vibrates. Elevated atomic states have faster-vibrating electrons. An electron should always be oscillating at some speed because it is a subatomic object with wave-like characteristics.
Why are electrons so important?Electrons are fundamental to many physical processes, including gravity, magnetic interactions, weak interrelations, electricity, magnetism, chemistry, and thermal conductivity. Ions and electrons are drawn into positive charges atoms by their nucleus's attraction pull. Unless an electrons received sufficient power to overcome this pressure by ascending, it was impossible for an electrons to escape from in an atom in mathematical mechanics.
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