If the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.
Kinetic energy is usually measured in units of Joules (J); one Joule is equal to 1 kg m2 / s2.
Kinetic energy is the energy of motion and is measured in Joules (J), which equates to kg · m²/s² in SI units. This is because it represents the same physical property as work and energy in physics.
Explanation:Kinetic energy is measured in units of joules (J), which are also the units for work and energy. This is because kinetic energy, the energy of motion, is related to the work done on an object and is a form of energy. The joule is defined as 1 kg · m²/s² in standard SI units, meaning it represents the amount of kinetic energy held by an object with a mass of 2 kilograms, moving with a velocity of 1 meter per second.
Historically, energy was measured in units of calories, but the SI unit of heat, work, and energy is the joule. One Joule is equivalent to 1 kg m²/s², which is also called 1 newton-meter. To standardize its definition, 1 calorie has been set to equal 4.184 joules.
The kinetic energy of an object can be calculated by the equation KE = 1/2mv², where 'm' is the mass of the object and 'v' is its velocity. This equation demonstrates that kinetic energy is proportional to the square of an object's speed, highlighting the relationship between energy, mass, and motion.
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How do musical instruments vary pitch?
by changing the frequency of standing waves
by increasing the amplitude of standing waves
by interrupting sound waves
by changing the wavelength of standing waves
by changing the frequency of standing waves
Musical instruments vary pitch by changing the frequency of standing waves.
In terms of the highest pitches they can make, which list correctly orders the instruments and vocals from highest to lowest?
clarinet, bassoon, piccolo, soprano vocal
piccolo, oboe, standup bass, tenor vocal
tuba, bass guitar, violin, piccolo
violin, clarinet, French horn, tuba
Answer:
violin, clarinet, French horn, tuba
Explanation:
did the exam
The instruments and vocals from highest to lowest is violin, clarinet, French horn, tuba.
What is pitch?The sound with high frequency is the high pitch and vice-versa.
Sounds are higher or lower in pitch depending on the frequency of vibration of the sound waves. A high frequency considered as a high pitch and a low frequency will be considered as a low pitch.
The given musical instruments clarinet, bassoon, piccolo, soprano vocal, bass guitar, tuba, french horn, oboe, standup bass, tenor vocal are listed. The highest to lowest pitch arrangement will be violin, clarinet, French horn, tuba.
Thus, the instruments and vocals from highest to lowest is violin, clarinet, French horn, tuba.
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When does radioactive decay occur
A. When an atom gains electrons
B.when neutrons accumulate in the nucleus
C.when the nucleus decays
D.when an atom loses electrons
Answer:
C.when the nucleus decays
Explanation:
In chemical reactions, the outermost electrons of atoms are re-arranged somehow without the involvement of the nuclei of the participating atoms of the elements.
Nuclear reactions causes changes within the atomic nucleus. For every atomic nucleus, a specific neutron/proton ratio ensures stability. When the stability ratio differs an atom becomes unstable and splits into one or more other nuclei with the emission of small particles of matter. This is what radioactivity entails.
Radioactive decay occurs when the unstable nucleus of an atom loses energy by emitting radiation, transforming it into a different, more stable element. Option C, when the nucleus decays, is the correct answer.
Radioactive decay occurs when an unstable atomic nucleus loses energy by emitting particles or electromagnetic waves. Among the given options, C. when the nucleus decays, is correct. This decay leads to the creation of different elements, as the original atom changes its atomic number. Alpha decay, beta decay, and gamma decay are some of the ways this process can occur. In alpha decay, an atom emits an alpha particle (two protons and two neutrons), which is equivalent to the nucleus of a helium atom. Through these decay processes, a radioactive isotope, or radioisotope, transforms into a more stable atom.
Make the following prefix conversions. 2 g = mg
Answer:
2000 mg are in 2 g
Explanation:
Answer:
2000 mg are in 2 g
hope this helps pls make this the brainliest
Abdominal breathing is a condition in which only the inferior half of the lungs can be seen expanding and contracting with each breath. Which of the following would cause abdominal breathing?
Damage to the nerves that control the diaphragm
Damage to the nerves that control the rib muscles
Damage to the medulla oblongata
Damage to the respiratory center
Answer:
The correct answer is - Damage to the nerves that control the diaphragm.
Explanation:
Abdominal breathing is a condition in which inferior half of the lungs can be seen relaxing or contracting and expanding with the breath. This condition occurs due to the various conditions that lead to the respiratory.
It is cause due to the damage to nerves that control the diaphragm. The phrenic nerve is one of the nerve of diaphragm initiates in the neck and passes down.
Thus, the correct answer is - Damage to the nerves that control the diaphragm.
The phrenic nerve is a nerve that originates in the neck (C3–C5) and passes down between the lung and heart to reach the diaphragm.
Answer:
A. Damage to the nerves that control the diaphragm
Explanation:
Covalent Bonds usually bond atoms of which type of elements together?
A. METALS TO METALS
B. METALS TO NONMETALS
C. NONMETALS TO NONMETALS
D. METALS TO METALLOIDS
Covalent bonds hold non-metallic atoms together. These atoms have many electrons in their outermost level and have a tendency to gain electrons rather than to yield them.
In this case the bond is formed by sharing a pair of electrons between the two atoms, one from each atom. Then, this pair of shared electrons is common to the two atoms and holds them together, so that both atoms acquire more stability.
Therefore the correct answer is C.
life cycle of a medium mass star
Our sun is a medium mass star, so it wouldn't be too different from the sun's life cycle. It is born, lives for about 10 billion years and then dies. ... As a medium mass star nears the end of its life, it runs out of hydrogen which it has been fusing onto helium in its core for its whole life.
Dichloroacetic acid is a compound with the chemical formula of CHCl2COOH. What is most likely the chemical formula for the acetic acid part of the compound? ClCH CHCOOH Cl2CO COOH
Answer:
Dichloroacetic acid is a compound with the chemical formula of CHCl2COOH. What is most likely the chemical formula for the acetic acid part of the compound?
CHCOOH
Explanation:
The most likely chemical formula for the acetic acid part is; CHCOOH.
According to the question;
Dichloroacetic acid is a compound with the chemical formula of CHCl2COOHWe are however required to determine the most likely chemical formula for the acetic acid part of the compound.By observation, the base compound is acetic acid which has a chemical formula; CH3COOH.
However, In Dichloroacetic acid, two hydrogen atoms on the methyl carbon are replaced by Chlorine atoms.Ultimately, the most likely chemical formula for the acetic acid part is; CHCOOH.
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What two factors determine the density of water in deep currents?
Answer:
There are two main factors that makeocean water more or less dense than about 1027 kg/m3: the temperature of the water and the salinity of the water.Ocean water gets more dense as temperature goes down. So, the colder the water, the more dense it is. Increasing salinity also increases thedensity of sea water.
Final answer:
The density of water in deep currents is determined by its temperature and salinity, with colder temperatures and higher salinity leading to denser water, which drives the thermohaline circulation.
Explanation:
The density of water in deep currents is determined primarily by two factors: temperature and salinity. As the temperature of water decreases, its density increases, which is often the case near the polar regions where the water is colder. Similarly, when the salinity of water increases, its density also increases, because the dissolved salts add to the mass of the water without significantly increasing its volume.
These changes in density are crucial for thermohaline circulation, the global pattern of deep currents that move throughout the oceans. Cold, high-salinity water becomes heavy enough to sink to the ocean's bottom in polar regions, setting deep currents into motion. As this dense water moves, it mixes with less dense water, contributing to a global circulation that plays a key role in regulating Earth's climate.
give an example of Newton's 1st law
Answer:
A ball moving until gravity pulls it back down to the ground
Explanation:
One example of Newton's first law is a crash test dummy moving forward during a sudden stop due to inertia. Another is a spinning top maintaining its motion without external forces like friction. Finally, a block would keep sliding on a table at constant velocity without friction, illustrating this law.
One example of Newton's first law, also known as the law of inertia, can be seen in a car crash test. Imagine a crash test where a car abruptly stops upon hitting a barrier. The crash dummy inside continues to move forward at the same speed and in the same direction as the car was traveling before the collision. This is because there is no external force acting on the dummy's body to change its state of motion, thus it keeps moving due to inertia, as stated by Newton's first law.
Another illustration is the behavior of a spinning top. A top will continue to spin at a constant speed in the absence of external forces such as friction. Once friction is introduced, it acts as an external force that gradually slows down the spinning top, demonstrating that without such forces, the object would maintain its motion indefinitely.
Finally, consider a block sliding on a table. The block will eventually come to a stop not because it naturally prefers to be at rest, but because of the force of friction acting between the block and the table. Without this friction or any other external force, the block would continue to slide at a constant velocity in a straight line as described by Newton's first law.
Can anyone help me please
The correct option is D
hope that helped?
Answer: is B
Explanation:
In terms of the scientific definition of work, magnetic fields can do work, but electric fields cannot.
In terms of the scientific definition of work, magnetic fields can do work, but electric fields cannot:
False
Answer:
FALSE
Explanation:
As we know that magnetic force is given by
[tex]\vec F = q(\vec v \times \vec B)[/tex]
so here magnetic force is always perpendicular to the velocity of the moving charge
so here we can say
[tex]\vec F . \vec v = 0[/tex]
so here since it is not producing any power so here rate of work done is zero which means it will not do any work
while in electrostatic force we know that
F = qE
so here force is not perpendicular to displacement or velocity so it will do work
Compared with the peak wavelength given off by the Sun, what is the peak wavelength given off by a hotter star?
A. Shorter in wavelength and higher in energy
B. Shorter in wavelength and lower in energy
C. Longer in wavelength and higher in energy
D. Longer in wavelength and lower in energy
Answer:
A. Shorter in wavelength and higher in energy
Explanation:
The peak wavelength of a star can be found by using Wien's displacement law:
[tex]\lambda=\frac{b}{T}[/tex]
where
b is the Wien's displacement constant
T is the surface temperature of the star
From the equation, we see that the peak wavelength [tex]\lambda[/tex] is inversely proportional to the temperature: therefore, a star which is hotter then the sun (greater T) will have shorter wavelength.
Moreover, the energy of the emitted radiation is inversely proportional to the wavelength:
[tex]E=\frac{hc}{\lambda}[/tex]
where h is the Planck constant, c is the speed of light. Therefore, shorter wavelength means higher energy.
So, the correct answer is
A. Shorter in wavelength and higher in energy
Answer:
The answer is A. shorter in wavelength and higher in energy
Explanation:
What will occur when the trough of wave A overlaps the trough of wave B?
Constructive interference will occur, which means the waves will combine.
In destructive inference, the waves cancel each other out.
Hope this helps :)
Answer:
Constructive interference
Explanation:
The superposition of two wave is called interference phenomenon. After interference of wave, the amplitude of resultant wave can be more, less or remains the same.
The two conditions of interference are :
1. Constructive interference 2. Destructive interference
According to given question, when the trough of wave A overlaps the trough of wave B constructive interference occurs. The amplitude of resultant wave is greater than the individual waves. Also, the energy of the resultant wave is more than the energies of wave A and wave B.
How does the intensity of a sound wave change if the distance from the source is reduced by a factor of 3?
Answer:
The intensity increases by a factor 9
Explanation:
The intensity of a sound wave follows an inverse square law, that means that it is inversely proportional to the square of the distance:
[tex]I\propto \frac{1}{r^2}[/tex]
where r is the distance from the source.
In this problem, the distance from the source is reduced by a factor 3, so the new distance is
[tex]r'=\frac{1}{3}r[/tex]
this means that the new intensity will be
[tex]I' \propto \frac{1}{r'^2}=\frac{1}{(\frac{1}{3}r)^2}=9\frac{1}{r^2}=9I[/tex]
So, the intensity will increase by a factor 9.
Answer:
The intensity increases by a factor of 9
How many neutrons does element X have if it’s atomic number is 28 and it’s mass number is 81?
Answer:
53
Explanation:
M-A=N
Mass-Atomic #= Neutrons
81-28= 53
The answer is 53,hope this help
Mr. and Mrs. Tew attended this summer band concert to her their son play his violin. When they sat down in their seats, they noticed that there were dead moments. That is, places in the music when they could not hear anything! They decided to move and sit directly in front of the band in the third row. How can you explain the dead spots they experienced?
Answer:
The dead spot experienced was due to the effect of sound wave interference
Explanation:
Sound wave interference occurs when wave interact. They can interact constructive manner increasing each other's strength and rising the intensity of the final wave produced.The waves can also interact destructively reducing each other's strength and intensity.In some cases, destructive interaction causes a total cancelling of the waves resulting to places where no sound can be heard at all.This area is the dead spot.
An electric generator uses __________ to convert mechanical energy into electrical energy.
electromagnetic induction
magnetic conductance
electric dynamism
electric return
Answer:
Devices that convert mechanical energy to electric energy. ... An electric generator is a device that changes kinetic energy to electrical energy through electromagnetic induction. ... [Figure1]. Q: What might happen to the current produced by an electric generator if the poles of the magnet kept reversing?
Explanation:
An electric generator uses electromagnetic induction to convert mechanical energy into electrical energy.
To find the correct option among all the options, we need to know about the principle of electric generator.
What is electric generator?Electric generator generates current by converting mechanical energy to electrical energy.It contains a turbine that rotates due to water or air flow through it which leads to the conversation of mechanical to electrical energy.What is the principle of electric generator?The rotating turbine contains coils of wire that rotate along with the turbine that is kept inside a stable magnetic field.Due to the rotation of the coils, magnetic flux is induced through the coils and induced current is produced. This is called electromagnetic induction.Thus, we can conclude that the option (a) is correct.
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A book weighs 4 N. When held at rest in your hands, the net force on the book isQuestion 9 options:
0 N.
0.4 N.
4 N.
39 N.
none of the above
Answer:
0n
Explanation:
Net force is all of the forces acting upon which are equal the gravitational force the regular force and you force pulling in both direction that all equal to another subtracted.
Calculate the force between charges of 5.0 x 10^-8 c and 1.0 x 10^-7 if they are 5.0 feet apart
Answer:
F = 19.375 x 10^-6 N
Explanation:
This problem can be solved by applying Coulomb's Law, which lets us determine the force between two electrically charged particles.
It is defined as
F = (ke * q1 * q2)/ r^2
Where,
ke = is Coulomb's constant ≈ 9×10^9 N⋅m^2⋅C^−2
q1 = 5.0 x 10^-8 C
q2 = 1.0 x 10^-7 C
r = 5 ft = 1,524 m
F = (9×10^9 N⋅m^2⋅C^−2)*(5.0 x 10^-8 C)*(1.0 x 10^-7 C)/ ((1,524 m)^2)
F = (9×10^9 N⋅m^2⋅C^−2)*(5.0 x 10^-8 C)*(1.0 x 10^-7 C)/ ((1,524 m)^2)
F = 19.375 x 10^-6 N
To calculate the force between two charges, we can use Coulomb's Law. The formula is F = k * (q1 * q2) / r^2, where F is the force, k is the electrostatic constant, q1 and q2 are the charges, and r is the distance between them. Plugging in the given values, we find that the force is 3.911 x 10^-6 N.
Explanation:To calculate the force between charges of 5.0 x 10-8 C and 1.0 x 10-7 C that are 5.0 feet apart, we can use Coulomb's Law.
Coulomb's Law states that the force between two charges is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.
The formula for Coulomb's Law is: F = k * (q1 * q2) / r2, where F is the force, k is the electrostatic constant, q1 and q2 are the charges, and r is the distance between them.
Plugging in the given values, we have: F = (8.99 x 109 Nm2/C2) * (5.0 x 10-8 C) * (1.0 x 10-7 C) / (5.0 feet * 0.3048 m/foot)2
Calculating the numerical value, we get: F = 3.911 x 10-6 N
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You have DNA samples from five different suspects. You know that all humans have very similar DNA. What feature of DNA allows you to match the DNA from one of your suspects to the crime scene sample?
Each person has unique genetic mutations
There are so many base pairs that there are individual differences
DNA rarely replicates so a person's DNA is always the same
Adenine pairs with a different base for each person
Answer:
The answer is positively B.
There are so many base pairs that there are individual differences.
Confirmed by my Forensics test today.
Explanation:
PLEASE PLEASE HELP! this is on newton’s 2nd law! i will award 20 points and make you brainliest! ASAP PLEASE! ;)
Answer: The correct answer is B
Explanation: The string is pulling right and the string is unraveling causing it to accelerate left
Answer:
b
Explanation:
When the mass of the cylinder increased by a factor of 3, from 1.0 kg to 3.0 kg, what happened to the cylinder’s gravitational potential energy? It decreased by a factor of 3. It decreased by a factor of 2. It increased by a factor of 2. It increased by a factor of 3.
Answer:
It increased by a factor of 3.
Explanation:
The gravitational potential energy of an object is given by
[tex]U=mgh[/tex]
where
m is the mass
g is the gravitational acceleration
h is the heigth of the object relative to some reference point (for instance, the ground)
As we see from the formula, the gravitational potential energy is directly proportional to the mass, m: therefore, if the mass of the cylinder is increased by a factor 3, then the gravitational potential energy will also increase by a factor 3.
Answer:
It increased by a factor of 2.
Explanation:
when two substances react chemically to produce a new substance, what is true of the mass of the two substances compared to the mass of the new substance
According to the law of conservation of mass, in a chemical reaction, the mass of the reactants is equal to the mass of the product; matter cannot be created or destroyed.
Explanation:When two substances react chemically to produce a new substance, the law of conservation of mass states that the mass of the reactants (the substances that are reacting) equals the mass of the product (the new substance formed). In other words, the total mass of the substances before the reaction is equal to the total mass after the reaction has occurred. This principle was established through careful quantitative analysis of chemical reactions in the 1790s, and it is a fundamental concept in chemistry that indicates matter cannot be created or destroyed in a chemical reaction; it can only change forms.
Which releases more energy, 100 grams of 100c water cooling to 50c, or 100 grams of iron at 100c cooling to 50c
Answer:Water
Explanation:
The 100g of water cooling from 100°C to 50°C releases more energy (5000 cal) compared to the 100g of iron cooling from the same temperature (535 cal). This is determined by the concept of specific heat capacity.
Explanation:To determine which releases more energy, we'll need to consider the concept of specific heat capacity, a property that depends solely on the type of substance absorbing or releasing heat. This is what will be crucial in deciding whether the 100g of water cooling from 100C to 50C or the 100g of iron cooling from 100C to 50C releases more energy. The specific heat capacity of water is around 1.00 cal/g °C, while the specific heat of iron is found to be about 0.449 J/g °C, as per given statements.
Calculating the heat or energy (q) lost in the cooling process is given by the formula q=mcΔT, where m stands for mass, c represents specific heat capacity, and ΔT is the temperature change. For water, we have q = (100g)(1 cal/g °C)(50°C) = 5000 cal. For iron, we need to first convert the specific heat capacity to cal/g °C (1 J = 0.239 cal), giving us ~0.107 cal/g °C. So, q = (100g)(0.107 cal/g °C)(50°C) = 535 cal for iron.
As evident, the 100 grams of water cooling from 100°C to 50°C releases more energy (5000 cal) than the 100 grams of iron undergoing the same temperature change (535 cal).
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Which is the correct symbol for an isotope of bromine with 35 protons and 38 neutrons?
Answer:
[tex]^{73}_{35}Br[/tex]
Explanation:
The correct symbol would be
[tex]^{Atomic Mass}_{Atomic Number}Br=^{35+38}_{35}Br = ^{73}_{35}Br[/tex]
The top number is the atomic mass of this form of Bromine. The bottom number is its position on the periodic table. The 73 is a bit light. Usually the weight is closer to 80.
A 0.50 kg ball has 3.0 J of kinetic energy, how fast is it moving?
Answer: 3.464 m/s
Explanation:
The Kinetic Energy [tex]K[/tex] is mathematically expressed as:
[tex]K=\frac{1}{2}mV^{2}[/tex] (1)
Where:
[tex]K=3J[/tex]
[tex]m=0.5kg[/tex] is the mass of the body
[tex]V[/tex] its velocity
Rewritting (1):
[tex]3J=\frac{1}{2}(0.5kg)V^{2}[/tex] (2)
Isolating [tex]V[/tex]:
[tex]V=\sqrt{\frac{6J}{0.5kg}}[/tex] (3)
Finally:
[tex]V=3.464m/s[/tex]
how do you know gravitational force used by Earth on objects makes objects fall down?
Answer:
When you throw something up like a glass cup for example, it falls down and breaks, that is because of gravitational force
Explanation:
THE CUP BREAKS BECAUSE OF THE DOWN FORCE
A motorcycle at a stoplight takes 4.22 seconds to accelerate to 28.0 m/s after the light turns green. What is its average acceleration?
Answer:
6.64 m/s²
Explanation:
Given in the question,
time it take to accelerate the motorcycle = 4.22 seconds
final speed motorcycle reach = 28 m/s
initial speed of motorcycle = 0 m/s
Formula to calculate
average acceleration = Δv / Δt= finalspeed - initialspeed / 4.22
= 28 - 0 / 4.22
= 28/4.22
= 6.64 m/s²
Help on the blank problem?
Answer:
0.03 s
Explanation:
The maximum force is 90 N, and the mass is 0.2 kg, so we can find the deceleration:
F = ma
-90 N = (0.2 kg) a
a = -450 m/s²
The initial velocity is 14 m/s, and the final velocity is 0 m/s, so the time is:
v = at + v₀
0 m/s = (-450 m/s²) t + 14 m/s
t = 0.03 s
The fastest she can slow it down to a stop without breaking it is in 0.03 s.