The frequency does the other car hear after they pass each other is 631.8 Hz.
Frequency heard by the second car
The frequency heard by the second car is calculated as follows;
f = f'(v/v - vs)
where;
f' is the original frequencyf is the later frequency heardv is speed of soundvs is source speedf = 595(343/343 - 20)
f = 631.8 Hz
Thus, the frequency does the other car hear after they pass each other is 631.8 Hz.
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A projectile is travelling at 1,429 ft/s. what is the speed of this projectile in km/h?
Answer:
1568 km/hr
Explanation:
First convert from ft/s to km/s
Do this by using a conversion rate.
3280 ft/km
(1429 ft/s)/(3280 ft/km) = 0.4355 km/s
Then convert from km/s to km/hr
Conversion rate 3600 s/hr
(0.4355 km/s)(3600 s/hr) = 1568 km/hr
Olympus mons, thought to be the largest volcano in the solar system, can be found on which planet?
Olympus mons can be found on Mars planet.
What is Olympus mons?In the Tharsis Montes region, close to the Martian equator, Olympus Mons is one of a dozen large volcanoes, many of which are ten to one hundred times taller than their terrestrial counterparts. The massive Martian mountain towers high above the surrounding plains of the red planet and may be waiting for the next eruption. The highest of them all runs about 374 miles (624 km), or about as far as the state of Arizona, and rises 16 miles (25 km) over the plains below. Olympus Mons rises three times higher than Mount Everest, which has a peak elevation of 5.5 miles above sea level and is the tallest mountain on Earth.
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Coulomb's law is similar to newton's law of gravitation in several ways. which one of the statements is not a similarity between these two laws?
The only dissimilarity between Coulomb's law and Newton's law of gravitation other than the type of force considered is Newton's law only considers negative force while Coulomb's law considers both forces.
In these contexts, it is considered that repulsive forces are positive and attractive forces are negative. So, Newton's law of gravitation considers gravitational force which only attracts. So, Newton's law of gravitation takes only negative force into account while Coulomb's law considers both electric charges.
According to Newton's law of gravitation,
F = G [tex]m_{1} m_{2}[/tex] / [tex]r^{2}[/tex]
According to Coulomb's law
F = k [tex]q_{1} q_{2}[/tex] / [tex]r^{2}[/tex]
Therefore, the only dissimilarity between Coulomb's law and Newton's law of gravitation other than the type of force considered is Newton's law only considers negative force while Coulomb's law considers both positive and negative forces.
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By observing the direction of current flow through the circuit, v oltage _____ can be determined.
Voltage polarity can be determined by the direction of current flow through the circuit
What is voltage polarity?All voltages and currents possess both magnitude and polarity. One current flows through the entirety of a series circuit with its polarity flowing from the negative battery terminal to the positive battery terminal. Polarities are also seen in voltage dips across loads. Utilizing the electron current's direction as a starting point is the simplest method for determining these polarities. The voltage is then negative where the electron current enters the load (Figure 31). No matter how many or what kind of loads are present in the circuit, this remains true. The potential drop is opposite of the source across the load. In opposition to the source voltage, the voltage dips lower it for the other loads.
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A student weighs a sample of an unkown metal and finds the mass to be 39.27g what is the metal?
The unknown metal with a mass of 39.27 g is potassium with the symbol K.
The mass of an atom is due to protons and neutrons present in it.
The protons and neutrons are together present in the nucleus of an atom.
The mass of any element is given by its mass number whose formula is
Mass Number = Number of protons + Number of neutrons
In the given case 39 = Number of protons + Number of neutrons
The only element of the periodic table which satisfies the above equation is potassium because it has 19 protons and 20 neutrons.
Thus, the unknown metal with a mass of 39.27 g is potassium with the symbol K.
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If a 390 n force f1 is applied to the piston with the 4 cm diameter, what is the magnitude of the force f2? neglect the weight of the pistons.
Given, Force = 390 N
Diameter of piston (1) = 4 cm
Diameter of piston (1) = 10 cm
now,
By using Pascal's Law which that states that " a pressure change at any point in a confined incompressible fluid is transmitted throughout the fluid such that the same change occurs everywhere", i.e. force per unit area is constant at any point in a confined incompressible fluid flow.
Mathematically, [tex]p=\frac{F1}{A1} = \frac{F2}{A2}[/tex]
where P is pressure at any point in a confined incompressible fluid
F1 and F2 = Force at point 1 and 2 respectively
A1 and A2 = Area of point 1 and 2
So, [tex]F2 = \frac{F1}{A1} * A2[/tex]
[tex](A1 = \frac{\pi D1^{2} }{4} )\\(A2= \frac{\pi D2^{2} }{4} )[/tex]
[tex]F2 = 390 * \frac{\frac{\pi D2^{2} }{4} }{\frac{\pi D1^{2} }{4} }[/tex]
[tex]F2 = \frac{390}{4*4} * 10^{2}[/tex]
F2 = 2437 N
The magnitude of the force f2 is 2437 N
The given question is complete, complete question is...
"If a 390 N force F1 is applied to the piston with the 4 cm diameter, what is the magnitude of the force F2 that can be resisted by the piston with the 10 cm diameter? Neglect the weights of the pistons."
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30 POINTS AND RLLY EASY
Which of these lists best describes the outer planets?
Select one:
a.
- have small core of rocks
- warmer temperatures than the inner planets
- thinner atmosphere than the inner planets
- located beyond the asteroid belt
b.
-smaller size than the inner planets
- made of gas or ice
-thicker atmosphere than inner planets
- reflect light from the sun
c.
- larger size than the inner planets
- evidence of volcanic activity
- thinner atmosphere than inner planets
- reflect light from sun
D.
- made mostly of ice or gas
- colder temperatures than the inner planets
- thicker atmosphere than the inner planets
- produce gravity
The characteristics of the outer planets are;
- larger size than the inner planets
- evidence of volcanic activity
- thinner atmosphere than inner planets
- reflect light from sun
What is the solar system?The solar system is composed of the sun and the planets. The planets move round the sun in concentric circles. The sun is the focus of the solar system. This is the heliocentric model of the ecosystem.
Now there are several planets in the solar system which are; Mercury · Venus · Earth · Mars · Jupiter · Saturn · Uranus · Neptune. The planets Mercury · Venus · Earth · Mars are the inner planets while the planets Jupiter · Saturn · Uranus · Neptune. are the outer planets.
The characteristics of the outer planets are;
- larger size than the inner planets
- evidence of volcanic activity
- thinner atmosphere than inner planets
- reflect light from sun
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What is the acceleration due to gravity on earth
The only substance near earth's surface that is found naturally in the current atmosphere as a solid, liquid, and a gas is:_________
Water is the only substance that is naturally present near the surface of the planet in the current atmosphere as a solid, liquid, and a gas.
What is the atmosphere ?The gaseous mixture that covers the planet is its atmosphere. The Earth's atmosphere contributes to the viability of life. In addition to giving us air to breathe, it protects us from the majority of the Sun's harmful ultraviolet (UV) radiation, increases the surface temperature of our planet by around 33° C (59° F) due to the greenhouse effect, and mainly eliminates dramatic temperature variations between day and night. There is an atmosphere on each of the other planets in our solar system, but none of them has the same proportion of gasses or layered structure as Earth's atmosphere.
The most prevalent elements are nitrogen and oxygen, which make up about 78% of dry air (N2) and about 21% of it, respectively (O2). Argon, carbon dioxide (CO2), and numerous other gases are also present in the atmosphere, although at considerably smaller concentrations; each makes up less than 1% of the total gas mixture. Water vapor is also present in the atmosphere. Water vapor is present, but its usual concentration is only about 1%. Additionally, there are a lot of tiny liquids and solids "floating" in the atmosphere. The term "aerosols" refers to a group of particles that also includes dust, pollen, spores, salt from sea spray, volcanic ash, smoke, and other substances.
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________ provides the raw material for evolution because it can create new alleles, which are alternative forms of the same ______.
Mutation provides the raw material for evolution because it can create new alleles, which are alternative forms of the same gene.
A mutation is a variation or change that occurs spontaneously in the sequence of the genes that make up the deoxyribonucleic acid (DNA).
Mutations can occur at three different levels:
Molecular (gene or point): Occurs in the DNA sequenceChromosomal: A chromosome segment is altered Genomic: Affects a specific set of chromosomeWhat is a gene?In biology, a gene is a unit composed of a chain of deoxyribonucleic acid (DNA) that contains the necessary information to transfer hereditary traits from one generation to the next.
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At 1:00 pm a car, traveling at a constant velocity of 98 km/hr toward the west, is 27 km to the west of our school. How far from the school will it be at 3:30 pm?
Answer:
See below
Explanation:
It will be 1 PM distance (27km) + 2 1/2 hrs of 98 km/hr
= 27 + 2 1/2 * 98 = 272 km west of school
A metro train is traveling at constant velocity. what are the net forces on (a) the first car, (b) the middle car, and (c) the last car?
The net forces on the first car is zero, the middle car is zero, and the last car is also zero.
What is a net force?In mechanics, the net force is the vector sum of all forces acting on a particle or object. The original forces' impact on the particle's motion is replaced by the net force, which is a single force. It causes the particle to accelerate at a rate equal to the sum of all those actual forces, as stated by Newton's second law of motion.
It is possible to figure out the torque connected to the point at which a net force is applied in order to keep the object's jets moving in the direction of the initial force field. Its resulting torque, the net force, has the same impact on the object's rotational motion as all actual forces combined.
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What horizontal force p must a worker exert on the rope to position the 50-kg crate directly over the trailer?
The horizontal force p must a worker, new tension is P= 122.62 N
The tension in the rope is
[tex]T_{1}=W_{create} g[/tex]
T1=50×9.81
T1=490.5 N
And the rope is in vertical position
When a worker exert a horizontal force P on the rope, new tension is
[tex]T_{2} =\sqrt{T1^{2} +P^{2} }[/tex]
[tex]T_{2} =\sqrt{490.5}^{2}+P^{2}[/tex]
Since T1 is vertical component to the tension T2
[tex]T_{1} =T_{2} cos \alpha[/tex]
[tex]490.5^{2} /cos^{2} 14.036=490.5^{2} +P^{2}[/tex]
[tex]P^{2} =490.5^{2} /cos^{2} 14.036 - 490.5^{2}[/tex]
P= 122.62 N
What is horizontal reaction force?As long as no horizontal applied forces are present, the horizontal response force is zero. A single-support cantilever beam has a response force and reaction moment. The total applied forces on the beam are equal to the reaction force.
When the compression pressures are removed, the distortion may either be permanent or reversible. In the latter scenario, the deformation creates reaction forces that compete with the compression forces and may ultimately bring them into balance.
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Where would you look to see the new moon, if it were visible, when it starts to rise?
The new moon, if it were visible, when eastern horizon starts at 6 am.
What is meat by eastern horizon?The first bilingual (Chinese and English) community radio show to be broadcast to a local audience in the United Kingdom is called Eastern Horizon. In recent years, it was primarily carried live on Saturdays between midnight and one in the morning on BBC Radio Manchester in Manchester.
The center of the horizon on the front of the planisphere points in the direction of North (0º azimuth). The eastern horizon is on the horizon's right side (90º azimuth), and the western horizon is on the horizon's left (270º azimuth).
The new moon, if it were visible, when eastern horizon starts at 6 am.
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Rotation curves for spiral galaxies show? they are slowing down. most of the mass lies in the nucleus. no relation to mass. most have dark halos. rotation speed drops off further from the nucleus.
Rotation curves for spiral galaxies show (C) most have dark halos since It appears that spiral galaxies are encased in the substantial dark matter "halos".
What do spiral galaxies' rotation curves show, and what can their rotation curves tell us about their mass and composition?Abstract The main method for ascertaining the mass distribution in spiral galaxies is to analyse the rotation curves of spiral galaxies. They offer vital knowledge for comprehending spiral galaxies' dynamics, evolution, and creation. This substance, which has mass but emits no light, is referred to as "dark matter." The dispersion of dark matter appears to extend much beyond the host galaxy's borders, according to the rotation curves of satellite galaxies.
Rotation curves are used by astronomers to calculate the masses of specific spiral galaxies. There is more mass between the stars and the galactic centre the quicker the stars orbit the galaxy's centre.
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How much charge must pass by a point in a wire in 10 s for the current inb the wire to be 0.50 a?
Charge must pass by a point in a wire is 5 Coulomb
Given:
time = 10 s = t
current = 0.50 A = I
To Find:
charge = q
Solution: Current is defined as amount of charge passing through a region per unit time. It is given by the formula
I = q/t
q = I x t = 0.50 A x 10 s = 5 Coulomb
Hence, charge must pass by a point in a wire is 5 Coulomb
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A cyclist starts from rest and accelerates at 4.0 m/s^2 for 3.0 s. the cyclist then travels for 20 s at a constant speed. how far does the cyclist travel?
A cyclist starts from rest and accelerates at 4.0 m/s^2 for 3.0 s. After that, the biker travels for 20 seconds at a steady speed. The cyclist travels 258 meters.
How does uniform motion work?This kind of motion is described as the motion of an item traveling in a straight line while maintaining a constant speed along that path while it traverses equal distances in similar amounts of the time, regardless of the length of the time.
A body's acceleration must be zero if it is moving rectilinearly and is doing so consistently.
When an object is travelling uniformly, its speed remains constant. When an item moves uniformly, its displacement is given by the formula x=vt, where v stands for constant velocity and t for the motion's time interval.
Given by, is the displacement of a motion with constant acceleration.
v is constant velocity
t is time interval of the motion.
Given by, is the displacement of a motion with constant acceleration.
[tex]x=v_{i}t+\frac{1}{2}at^{2}[/tex], where
It has a constant acceleration of a
[tex]v_{i}[/tex] is the motion's time interval, and t is the beginning velocity.
Answer and justification
Given: The cyclist's starting speed is,
[tex]v_{i}[/tex]=0
The cyclist's initial acceleration is 4 m/s2.
The span of time during which motion has a constant acceleration is,
[tex]t_{1}[/tex]=3s
The cyclist's displacement in 3 seconds will be,
[tex]x_{1}= v_{i}t_{1}+\frac{1}{2}at_{1}^{2}=0(3)+\frac{1}{2}(4)(3)^{2}=18m[/tex]
After 3 seconds, the cyclist's final speed will be,
[tex]v_{f}= v_{i}+at_{1}=0+4(3)=12m/s[/tex]
t2=20s is the time interval for a cyclist traveling at a steady speed.
The biker will move x2 in the following 20 seconds at a constant speed,
x2=[tex]v_{f}t^{2}[/tex]=(1/2)(20)=240m
The biker will have covered a total distance of
x=x1+x2=18+240=258m.
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The work function for chromium metal is 4.37 ev. What wavelenght of radation must be used to eject?
Wavelength of radiation must be used to eject electrons with a velocity of 2300 km/s is 63.9nm.
Equation :Einstein's equation for the photoelectric effect
hv = A + W
Where,
Energy of photon : E = hvx = hxc/λ
The work function for chromium is A
Planck's constant h= 6.626X 10⁻³⁴ Js
speed of light c = 2.998X10⁸ m/s
Velocity of 2300 km/s = 2300 X 10⁶ m/s
The kinetic energy of emitted electron
W = mv²/2 = (9.10939 X 10⁻³¹ kg X (2300X10⁶ m/s)²)/2 = 2.409X10⁻¹⁸
Hence,
λ = ch/A+W
λ = (6.626X10⁻³⁴JsX2.998X10⁸m/s)/(7X10⁻¹⁹J + 2.409X10⁻¹⁸J)
= 19.865X10²⁶Jm/3.109X10⁻¹⁸J = 6.39X10⁻⁸= 63.9 nm
Wavelength of radiation must be used to eject electrons with a velocity of 2300 km/s is 63.9nm
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I understand that the question you are looking for is "The work function for chromium metal is 7.0 x 10-19 J (4.37 eV). What wavelength of radiation must be used to eject electrons with a velocity of 2300 km/s?"
6. Why might a small increase in the dimensions of an object cause a large change in
volume?
Answer:
Because volume is determined as the product of length and width as well as height of an object.So change in any dimension can change the other two dimensions as well which brings about a greater change in volume by carrying out the product of the dimensions .
Explanation:
Length x width x height = Volume of a regular shaped object
A ball accelerates uniformly at −2.00 m/s2.
If the ball was initially moving at 0.20 m/s and the ball travels for 7.00 s, then what was its final velocity?
−1.8 m/s
negative 1.8 meters per second
−13.8 m/s
negative 13.8 meters per second
−14.2 m/s
negative 14.2 meters per second
+13.8 m/s
The final velocity of the ball, given the data is –13.8 m/s
What is acceleration?This is defined as the rate of change of velocity which time. It is expressed as
a = (v – u) / t
Where
a is the acceleration v is the final velocity u is the initial velocity t is the time How to determine the final velocityThe final velocity of the ball can be obtained as follow:
Acceleration (a) = −2 m/s² Initial velocity (u) = 0.2 m/sTime (t) = 7 sFinal velocity (v) = ?a = (v – u) / t
–2 = (v – 0.2) / 7
Cross multiply
v – 0.2 = –2 × 7
v – 0.2 = –14
Collect like terms
v = –14 + 0.2
v = –13.8 m/s
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Write a short summary of each step
Answer:
I need help ASAP to with this question
Explanation:
Please hurry up with assignment
On vacation you and your family go from Charleston to New Orleans you leave at 7:00 am and arrive at 4:00 pm and the trip’s distance is 850 miles
The average velocity of you and your family go from Charleston to New Orleans is (Vₐ)= 152.92 km/h
What is velocity?The term velocity explains that the object or particle displacement within the respected time. Average velocity is total displacement divided by total time.
How can we calculate the value of average velocity?To calculate the value of average velocity we are using the formula here is,
Vₐ = (s₁+s₂)/(t₁+t₂)= sₐ/tₐ
Here we are known,
t₁= You and your family leave to go from Charleston to New Orleans = 7:00 am.
t₂=You and your family reached to go from Charleston to New Orleans = 4.00 pm.
tₐ=Time interval between the leaving and reaching time=9 hour.
sₐ= The trip’s distance to go from Charleston to New Orleans= 850 miles
Now we put the values in the above equation we get,
Vₐ =sₐ/tₐ
Or, Vₐ =850 miles/9 hour
Or, Vₐ =94.4 miles/hour.
Or, Vₐ = 152.92 km/hour.
According to the calculation we can write that,
The average velocity of you and your family go from Charleston to New Orleans is (Vₐ)= 152.92 km/h
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On vacation you and your family go from Charleston to New Orleans you leave at 7:00 am and arrive at 4:00 pm and the trip’s distance is 850 miles. what is the average velocity of the trip?
PLS HELP ILL GIVE BRAINLIEST
AND IF YOURE ABLE TO PLS PROVIDE THE EXPLANATION TYSMMMM
In frustration, a junior drops the APUSH textbook 1.5 m. How long will it take to hit the ground?
The time taken for the APUSH textbook to hit the ground is determined as 0.55 seconds.
What is time of motion?The time of motion of an object is the time taken for the object to travel from its initial point to the final point.
The time taken for the APUSH textbook to hit the ground is calculated as follows;
t = √(2h/g)
where;
h is the height of fall of the textbookg is acceleration due to gravityt = √(2 x 1.5/9.8)
t = 0.55 seconds
Thus, the time taken for the APUSH textbook to hit the ground is determined as 0.55 seconds.
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In a normal distribution of measurements having a mean of 410 feet and a standard deviation of 45 feet, what percent of the distribution falls between 400 and 500 feet?
18.45 % percent of the distribution falls between 400 and 500 feet.
Z score is a standard score that tells you how many standard deviations away from the mean an individual value X.
Mean value ,μ= 410 feet
Standard deviation, σ = 45 feet
X = square of an individual
In a set with mean value and standard deviation the z score of a measure X is given by:
Z = (X - μ)/σ
percent of the distribution that falls between 400 and 500 feet
when
X = 400feet
Z = 400-410 / 45 = -0.22
p-value for Z= 400 is 0.4129
X = 500 feet
Z = 500- 410 / 45 = 2
p-value for Z = 500 is 0.2275
So there is 0.4129 - 0.2275 = 0.1854 = 18.45 %percent of the distribution falls between 400 and 500 feet.
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If the frequency of a wave is
20
H
z
, what is the period of the wave?
A car initially traveling at 15 m/s North accelerates to 25 m/s North in 4 seconds. The magnitude of the average acceleration is?
The average acceleration of the car as it accelerates from 15 m/s to 25 m/s will be 2.5 m/s².
What is Average acceleration?Average acceleration is the average rate of change of velocity with respect to time. Mathematically -
a = Δv/Δt
Given that a car is traveling at 15 m/s in north direction and in 4 seconds it accelerates to 25 m/s in the north direction only. Therefore, we can write -
initial velocity [u] = 15 m/s
final velocity [v] = 25 m/s
time taken [Δt] = 4 s
The magnitude of the average acceleration can be calculated as follows-
a = Δv/Δt
Δv = v - u = 25 - 15
Δv = 10 m/s
Therefore -
a = 10/4
a = 2.5 m/s².
Therefore, the average acceleration of the car will be 2.5 m/s².
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A tennis player serves a ball horizontally at a height h = 2.7 m a distance d = 14.9 m from the net. what minimum speed must the ball be served so as to clear the 1.08 m tall net?
The minimum speed the ball must be served so as to clear the net is 25.69 m / s
We know that,
Speed = Distance / Time
In order to calculate the time, we can use one of the equations of motion,
y = [tex]y_{0}[/tex] + [tex]v_{0}[/tex]t + 1/2 a[tex]t^{2}[/tex]
where,
y = Initial height
[tex]y_{0}[/tex] = Final height
[tex]v_{0}[/tex] = Initial velocity
a = Acceleration due to gravity
t = Time
Given that,
y = 2.7 m
[tex]y_{0}[/tex] = 1.08 m
[tex]v_{0}[/tex] = 0
a = -9.81 m / [tex]s^{2}[/tex] (Due to gravity)
Distance = 14.9 m
y = [tex]y_{0}[/tex] + [tex]v_{0}[/tex]t + 1/2 a[tex]t^{2}[/tex]
2.7 = 1.08 + 0 + 1/2 * ( -9.81 ) * [tex]t^{2}[/tex]
[tex]t^{2}[/tex] = 1.62 / ( - 4.9 ) = 0.33
t = 0.58 s
Speed = 14.9 / 0.58
Speed = 25.69 m / s
Velocity (speed) is the rate of change of distance with respect to time. It is denoted as V.
Therefore, the minimum speed the ball must be served so as to clear the net is 25.69 m / s
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The substance that maintains body temperature, and acts as a lubricant and protective cushion is:_______
Water serves as a lubricant and a shock absorber as part of body fluids.
Which of the following nutrients controls body temperature and lubricates joints?Water transports vital nutrients within the body, eliminates waste, and regulates body temperature. It keeps our youthful, able bodies active and healthy by acting as a lubricant around joints and a shock absorber for the body's organs.Which nutrient helps the body regulate and maintain body temperature?60% of our body mass is made up of water, a nutrient. It is a component of every cell and tissue in the body and serves a variety of critical activities. Water distributes other nutrition to all parts of the body, it takes waste out of the blood and it helps to maintain body temperature.learn more about here
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The left hand plays a steady one-two beat in duple meter, while the right hand emphasizes notes that fall in between these beats. what is the name for this technique?
The left hand plays a steady one-two beat in duple meter, while the right hand emphasizes notes that fall in between these beats. The name for this technique is syncopation.
What is syncopation?Syncopation in music is the technique of fusing several rhythms to produce an entirely or partially off-beat piece of music. Simpler definitions for syncopation include "a disruption or interruption of the regular flow of rhythm" and "the placing of rhythmic stresses or accents where they wouldn't normally occur." It requires the correlation of at least two sets of time periods. Syncopation is used in many different musical genres, especially dance music. According to music producer Rick Snoman, syncopation is a fundamental element of any dance music and frequently serves to tie the entire song together. Syncopation, usually in the form of a back beat, is a feature of almost all contemporary popular music.Learn more about the syncopation with the help of the given link:
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A mountain climber is about to haul up a -m length of hanging rope. how much work will it take if the rope weighs n/m?
The work done to haul up the rope is Nm.
We need to know about work to solve this problem. Work can be defined as the energy transferred to or from an object via the application of force along a displacement. It can be written as
W = F x s
where W is work, F is force and s is the displacement.
From the question above, we know that
λ = N/m
s = m
Find the force applied
F = λ . s
F = N/m . m
F = N
Find the work done
W = F . s
W = N . m
W = Nm
Hence, the work done to haul up the rope is Nm.
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