The wavelength of the wave produced by the sound is found as 0.312 m.
Explain the relation of wavelength and velocity?As a result, an increase in just about any one quantity while maintaining a constant value for the other will increase the wave speed, which is mathematically equal to that product of the wave's wavelength and linear frequency.Mathematically: v = fλ;
In which;
v = speed of the waveλ = wavelength of the wavef = frequency of the waveThe given data for the question-
f = 1100 Hz ; frequency of sound
v = 344 m/s; speed of the sound
λ = wavelength of the wave
Put the value in the formula;
344 = 1100 x λ
λ = 344/1100
λ = 0.312
Thus, the wavelength of the wave produced by the sound is found as 0.312 m.
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the signal detected by a doppler radar is: question 8 multiple choice options a radiowave emitted by lightning a soundwave produced by thunder a radiowave reflected by precipitation a soundwave produced by wind shear
The signal detected by a Doppler radar is: a radio wave reflected by precipitation
How does Doppler radar works?Doppler weather radar determines the speed of precipitation in the atmosphere, that is somewhere near to the radar. Precipitation as it falls generally moves with the wind, this the wind velocity can be determined with doppler technology.
It uses doppler effect. It refers to the change in wave frequency when their occurs a relative motion between a wave source and its observer
A Doppler radar uses electromagnetic radiation waves that can detect how far away precipitation takes place.
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if column a gets heated what happens to the ball
Answer:-A metal ball is made up of atoms having minimum interatomic distance, so when we heat the metal its atoms actually vibrate about their mean position and thus colliding with neighboring atoms and making them to vibrate, due to this continuation process metals size increases or metal expands on heating.
When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. The end result of increased molecular motion is that the object expands and takes up more space “Steel will expand from 0.06 percent to 0.07 percent in length for each 100oF rise in temperature. The expansion rate increases as the temperature rises. Heated to 1,000oF, a steel member will expand 9½ inches over 100 feet of length When a metal ring is heated both inner and outer radii increase. This can be understood better by visualizing that the ring in reality is a rod bent into a circle. That rod will expand upon heating. The same bar bent into a ring thus also expands.
Which options rotates the square 90 degrees…? Which option rotates the square 90 degrees (one quarter turn) clockwise?'
Rotates the square 90 degrees is to turn a quarter turn counterclockwise direction.
When magnitude and direction are used together, a quantity is said to be a vector. On the other hand, is a scalar quantity is one whose magnitude perfectly captures its nature. In order to comprehend motion and forces that occur in two dimensions, it is important to learn some vector basics and apply those are basics.
Previously covered vector values include displacement, velocity, acceleration, and force. A complete description of each of these quantities necessitates the listing of both a magnitude and a direction.
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which of the following statements is false? group of answer choices hubble space telescope images are black and white when they are obtained. red glass allows only the red light to pass through. filters are used by the hubble space telescope to record light at certain wavelengths, block out light outside of a certain range. the hubble space telescope can detect ultraviolet light. green glass allows all colors of light but the green light to get through.
The false statement is that green glass allows all colors of light but the green light to get through. Hence, option D is correct.
What is Wavelength?The distance between two identical locations (adjacent crests) in successive cycles is known as the wavelength, and it is used to describe waveform signals that are transmitted over wires or into space. Typically, in wireless systems, this length is specified in meters (m), centimeters (cm), or millimeters (mm).
The Hubble Space Telescope is designed to discriminate between the visible, infrared, and brilliant electromagnetic spectrums. The photographs indicate that the telescope captured only black and white images. This telescope primaries the Red, Green, and Blue filters, which are divided into three channels. The majority of these filters allow the distinct wavelengths, which are not identical to them, and mirror the red, green, and blue spectrum. Yes, ultraviolet light can be detected by Hubble Space Tempe. Only red light can travel through the red glass.
Only green light will be able to pass through the green glass. For instance, the green light will only pass through green glass and won't pass through red glass.
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determine the magnitude of the gravitational force mars would exert on your body if you were on the surface of mars.
The magnitude of the gravitational force mars would exert on your body if you were on the surface of mars 252.6 N.
Why is it called gravitational force?Because it consistently attempts to pull objects together rather than pushing them apart, the gravitation force is known as attractive. It is obvious that the gravitational force directly relates to the masses of the two interacting objects; larger, more massive stars will pull apart with a stronger gravitational force. Because of size of the Earth and how far out from its core humans are on its surface, attraction (or the acceleration caused by gravity) equals 9.81 m / sec squared on Earth's surface.
Briefing:Newton's Law of Gravitation is used to mathematically determine the force between two bodies.
[tex]$F=G \frac{M m}{r^2}$[/tex]
[tex]$F=6.674 * 10^{-11} * \frac{68 * 6.42 * 10^{23}}{3396000^2}=252.6 \mathrm{~N}$[/tex]
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The complete question is-
Determine the magnitude of the gravitational force Mars would exert on man if he was on the surface of Mars. The mass of the man is 68.0 kg . The mass of the Mars is 6.42×1023kg and its radius is 3396 km
consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? (a) es in the x-direction, bs in the y-direction; (b) es in the -y-direction, bs in the x-direction; (c) es in the z-direction, bs in the -x-direction; (d) es in the y-direction, bs in the -z-direction.
The direction of the propagation of the wave is -x direction.
The direction of the propagation of the wave in each case are:
A) +z direction
B) +z direction
C) -y direction
D) -x direction
\vec Ein is the Electrical field vector and \vec Bin is the Magnetic field vector, because the field vectors are always perpendicular to each other the propagation of the wave is perpendicular to the two vectors. The direction of the propagation of the wave can be found by \vec Ein X \vec Bin (Cross product of two vectors). This can also be done by using the RIGHT HAND RULE.
Cross product can be found by
i x j = k and j x i = - k
j x k=i and k x j = - i
k x i=j and i x k = - j
where i represents the +x direction, j represents the +y direction and k represents the +z direction
The RIGHT HAND RULE can be used to illustrate the cross product by using the right hand and pointing the index finger in the direction of the first vector and the middle finger along the second vector, the cross product is in the direction of the thumb.
A) \vec Ein the +x direction,\vec Bin the +y direction,
Finding the cross product of the two vectors (i x j = k) would give a vector in the +z direction
B) \vec Ein the -y direction,\vec Bin the +x direction
Finding the cross product of the two vectors (- j x i = k) would give a vector in the +z direction
C) \vec Ein the +z direction,\vec Bin the -x direction
Finding the cross product of the two vectors (k x - i = - j) would give a vector in the -y direction
D) \vec Ein the +y direction,\vec Bin the -z direction
Finding the cross product of the two vectors (j x - k = - i) would give a vector in the -x direction
The direction of the propagation of the wave is -x direction.
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a child in a tree house uses a rope attached to a basket to lift a 26 nn dog upward through a distance of 5.0 mm into the house.
Total work done is 0.13 Joules
What is work done ?The sum of the displacement and the component of the applied force of the object in the displacement direction is the work done by a force.
According to the given information
We need to find the work done
work done = force × distance
We are given,
force = 26 N
Distance = 0.0005 meter
hence ,
Work done = 26 × 0.005
= 0.13 Joules
Total work done is 0.13 Joules
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Which of the following statements about your derivation of the ideal gas law are true? Check all that apply. The Equipartition Theorem implies that )-G). O(2)Z) owing to inelastic collisions between the gas molecules. With just one particle in the container, the pressure on the wall (at z - Lz) is independent of Ly and L. O With just one particle in the container, the average force exerted on the particle by the wall (at -Lz) is independent of Ly and Lz Submit Previous Answers Request Answer
The equipartition theorem predicts that (Vx)²=(Vy)². The average force this wall applies to a particle in a container containing a single particle is independent of Ly& Lz.
The equipartition theorem establishes a connection between a system's temperature and average energy in classical statistical mechanics. Other names for the equipartition theorem include the law of equipartition, the equipartition of energy, and just the word "equipartition." A molecule's average kinetic energy per degree of freedom in translational motion should be equal to that in rotational motion, for example, according to the basic concept of equipartition, which states that energy is distributed equally among all of its many forms in thermal equilibrium.
Quantitative predictions are made using the equipartition theorem. Similar to the virial theorem, it provides the total average kinetic and potential energies for a system at a specific temperature, allowing one to calculate the system's heat capacity. Equipartition, however, also provides the average values for each of the energy's component parts.
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Correctly identify the following formed elements. eBook Lymphocyte Neutrophil Eosinophil Platelets Monocyte Basophil Prev 1 of 17 Next >
Granulocytes (neutrophils, eosinophils, and basophils), monocytes, and lymphocytes are different kinds of white blood cells (T cells and B cells). Histamine is released by basophils to elicit an all-purpose immune response.
While battling germs and parasites, eosinophils can also cause allergic symptoms. B and T cells that function as lymphocytes protect the body from particular invaders. Monocytes remove dead cells from the body. Granulocytes, lymphocytes, and monocytes are the three primary types of white blood cells according to medical experts. All of the body's components receive nutrition and oxygen so they can continue to function. The lungs, kidneys, and digestive system use the blood to transport carbon dioxide and other waste products to be expelled from the body. Additionally, blood transports hormones throughout the body and fights infections.
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For lunch you and your friends decide to stop at the nearest deli and have a sandwich made fresh for you with 0. 300 kg of italian ham. The slices of ham are weighed on a plate of mass 0. 400 kg placed atop a vertical spring of negligible mass and force constant of 200 n/m. The slices of ham are dropped on the plate all at the same time from a height of 0. 250 m. They make a totally inelastic collision with the plate and set the scale into vertical simple harmonic motion (shm). You may assume that the collision time is extremely small.
After the ham slices touch the plate, the scale oscillates at an amplitude of 0.0581 m.
What is the meaning of collision and example?A collision that occurs when two vehicles collide violently: On the southbound section of the road, there has been an accident. Two drivers were murdered in a face (= direct) collisions between being an automobile and a cab last night.
Briefing:It is the greatest deviation an object makes from its average location. By using the formula, it may be determined.
ν=ω
ν=ω[tex]\sqrt{A^{2}-x^{2} }[/tex]
Where,
v- velocity
w- angular velocity
A - amplitude
x - displacement
Put the values in the formula,
0.95=6.9[tex]\sqrt[n]{A^{2} -0.0147^{2} }[/tex]
A=0.0581m
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I am from _______ (specific ordinary item), from _______ (product name) and _______. I am from the _______ (home description... adjective, adjective, sensory detail). I am from the _______ (plant, flower, natural item), the _______ (plant, flower, natural detail) I am from _______ (family tradition) and _______ (family trait), from _______ (name of family member) and _______ (another family name) and _______ (family name). I am from the _______ (description of family tendency) and _______ (another one). From _______ (something you were told as a child) and _______ (another). I am from (representation of religion, or lack of it). Further description. I'm from _______ (place of birth and family ancestry), _______ (two food items representing your family). From the _______ (specific family story about a specific person and detail), the _______ (another detail, and the _______ (another detail about another family member). I am from _______ (location of family pictures, mementos, archives and several more lines indicating their worth). Brainstorming ideas: "I'm From" Idea Gathering Smells from your childhood Places in your home and neighborhood Close family members Lands and places your family is from Sayings in your family Songs/stories your family sings/tells Where you keep memories Tastes from your childhood
Bobby pins, stacks of newspapers, grandma's teeth in a glass. 2. Items found in your yard/things you used to do in the yard: dog bones, broken fences, flashlight tag, a hose coiled like a snake. (Feel free to think metaphorically.)
What's an ordinary item?
Very roughly, ordinary objects are objects belonging to kinds that we are naturally inclined to regard as having instances on the basis of our perceptual experiences: dog, tree, table, and so forth
What has made The Ordinary so popular?
The Ordinary differs from other beauty companies because it combines research with straightforward packaging, high active ingredient concentrations, and affordable pricing points. The Ordinary offers skin care, hair care, complete body care, and makeup with an emphasis on straightforward, scientifically supported ingredients.
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a grinding wheel 0.35 m in diameter rotates at 2200 rpm. calculate its angular velocity in rad/s. (b) what are the linear speed and acceleration of a point on the edge of the grinding wheel?]
There is a 230 radian per second angular velocity.
40.25 m/s is the linear speed.
Speed and acceleration at an angle:Given that the wheel has a 0.35 m diameter.
as a result, radius D/2
Because one revolution equals one radian.
Thus, an is equal to the product of the velocity change and the time change. a = (w2w1)/(t2t1) a = (w 2w1)/(t2t1).
230 radians per second are hence the angular velocity.
a=v^{2} \r\s(40.25)/0.175\s9257.5
How is angular velocity determined?In uniform circular motion, the angular velocity (w), which is a vector quantity, is determined by dividing the angular displacement (), another vector number, by the change in time (t). The arc length traveled (S) divided by the shift in time (t) is the definition of speed.
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two streams merge to form a river. one stream has a width of 8.2 m, depth of 3.4 m, and current speed of 2.3 m/s. the other stream is 6.8 m wide and 3.2 m deep, and flows at 2.6 m/s. if the river has width 10.5 m and speed 2.9 m/s, what is its depth?
The depth of the river is calculated to be 3.7 m
Given,
Width of stream 1 = 8.2 m
Depth = 3.4 m
Current speed = 2.3 m/s
Width of second stream = 6.8 m
Depth = 3.2 m
Current speed = 2.6 m/s
Width of the river = 10.5 m
Current of river 3 = 2.9 m/s
For stream 1
h₁ = 3.4 m ,b₁= 8.2 m ,v₁= 2.3 m/s
For stream 2
h₂ = 3.2m ,b₂= 6.8 m , v₂=2.6 m/s
For river 3
b= 10.5 m ,v= 2.9 m/s
Lets take depth of the river = h
Total discharge should be constant.
We know that discharge
Q= A v
A=Area ,v=velocity
Q₁+Q₂ = Q
By putting the values
h₁b₁v₁ + h₂ b₂ v₂ = b h v
3.4 x 8.2 x 2.3 + 3.2 x 6.8 x 2.6 = 10.5 x 2.9 x h
h= 3.78 m
Therefore, the depth of the river is 3.78 m
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moons that show few craters probably
Moons that display few craters presumably. They all pass straight over the equator of the globe. Uranus's five biggest moons. have the closest magnetic field axis.
Which 4 moons are known?There are many fascinating moons around the globe, but the Galilean satellites—Io, Europa, Ganymede, and Callisto—the first four moons identified beyond Earth—hold the most scientific curiosity.
Can Earth have Two moons?Moon and Earth
The basic explanation is that Earth only has one moon, that we name “the moon”. It is the biggest and brightest object in the night sky, and the only solar system body except Earth that humanity have visited in our space travel activities.
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how can the period of oscillation and the parallel axis theorem be used to find the omment of inertia of an object about its center of mass
Using the parallel axis theorem, the interactive determines the inertia moment of a semicircle about three different axes.
What's the connection between time and moment of inertia?the length of an actual pendulum The inertia moment can be used to determine T=2ImgL T = 2 I m g L.The distance L between the mass center and the point of rotation.
What do the terms parallel axis theory and parallel axis theorem mean in relation to a lamina's moment of inertia?According to the parallel axis theorem, a body's inertial moment (I) about any axis equals the total of its moments of inertia (ICM) along all of its parallel axes.
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what mass of fuel is needed to reach a top speed of 4000 m/s ?
103.4 kg mass of fuel is needed to reach a top speed of 4000 m/s .
What is speed ?
The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined. Since speed only has a direction and no magnitude, it is a scalar quantity.
Let fuel is released at the rate of dm / dt where m is mass of the fuel
thrust created on rocket
= d ( mv ) / dt
= v dm / dt
this is equal to force created on the rocket
= 220 dv / dt
so applying newton's law
v dm / dt = 220 dv / dt
v dm = 220 dv
dv / v = dm / 220
integrating on both sides
∫ dv / v = ∫ dm / 220
lnv = ( m₂ - m₁ ) / 220
ln4000 - ln 2500 = ( m₂ - m₁ ) / 220
( m₂ - m₁ ) = 220 x ( ln4000 - ln 2500 )
( m₂ - m₁ ) = 220 x ( 8.29 - 7.82 )
= 103.4 kg .
Complete question: A rocket in deep space has an empty mass of 220 kg and exhausts the hot gases of burned fuel at 2500 m/s. What mass of fuel is needed to reach a top speed of 4000 m/s.
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what is the relationship between voltage and energy? more precisely, what is the relationship between potential difference and electric potential energy?
Voltage is usually known as potential difference, which is the difference of potentials at two different points. Amount of work done to move a unit positive charge from one point to other is potential difference.
What is the relationship between electric potential energy and potential difference?Voltage is the electric potential energy per unit charge, which is measured in joules per coulomb ( volts). It is referred to as electric potential which must be distinguished from electric potential energy by understanding that potential is a per-unit-charge quantity.
The potential difference between points A and B, VB−VA, is defined to as the change in potential energy of a charge q moved from A to B, and then divided by the charge.
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what is the average efficiency of an electric motor, compared to the 35 percent efficiency of an internal combustion engine
The direct answer to your question is that electric engines can be more than 80% efficient and even up to 90% efficient while combustion engines are 30 to 45% efficient.
Electric motors make vehicles substantially more efficient than internal combustion engines. Electric motors convert over 85 percent of electrical energy into mechanical energy, or motion, compared to less than 30 to 40 percent for a gas combustion engine.
These efficiencies are even lower after considering losses as heat in the drivetrain, which is the collection of components that translate the power created in an electric motor or combustion engine.
• Motor efficiency: 85..90%
• Battery load efficiency: 80..90 %
• Battery discharge efficiency: 80..90 %
• Power generation efficiency at power: 30..40 %
• Transfer efficiency from the powerplant to the reloading station: 90..95 %
• Energy conversion efficiency AC to DC: 90..95 %
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suppose we found out that there is no dark matter in galaxies. what is an alternate explanation of the rotation curve?
Our understanding of gravity is wrong for great distances is an alternate explanation of the rotation curve.
What is galaxies and its types?Astronomers classify galaxies into three basic categories: elliptic, spiral, and irregular. These galaxies come in a wide range of sizes, from star clusters with as few as 25 million stars to massive galaxies with more than a trillion stars.
How do galaxies develop?Massive gas clouds that collapse + rotate are the starting point for galaxies. Stars develop within them as they develop. The collision of entire galaxies can alter their appearance. We can view planets at earlier stages of evolution by gazing deep into space, which helps us understand how galaxies evolve.
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22. two slits, each 0.80 mm wide, are 2.6 mm apart: when light is shone through them onto a screen how many interference maxima are there between the first diffraction minimum on the left side and the first diffraction minimum on the right side? a 1 b. 3 c.5 d. 7 e.9
Option (D) is the correct answer
Given data: width of each slit, a = 0.80 mm.
distance between the slits, d = 2.6 mm
If the wavelength of light is \lambda then,
2.6 ) = 2 x (0.8) = 6.5 r=2x
x = 7 ( taking the next higher integer of 6.5)
The wavelength of a wave describes how lengthy the wave is. The distance from the "crest" (top) of 1 wave to the crest of the following wave is the wavelength.
Alternately, we can degree from the "trough" (bottom) of 1 wave to the trough of the subsequent wave and get the equal price for the wavelength.
SI unit of wavelength is metre . At the same time as measuring wavelength the multiples or fractions of a metre is also used. Extensively, exponential powers of 10 are used whilst wavelengths are of a huge assets.
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laser beams are sometimes used to burn away cancerous tissue.show answer no attempt what is the intensity, in watts per square meter, of a laser beam that is 90.0% absorbed by a 1.8-mm diameter spot of cancerous tissue and must deposit 525 j of energy to it in a time period of 4.25 s?
The intensity of the beam is 1.21*10^7 W/m^2 and the intensity is define as number of photons per unit time.
Radiation beam is energy in the form of waves of particles. There are two forms of radiation which are non-ionizing and ionizing.
Non-ionizing radiation has less energy than ionizing radiation; it does not possess enough energy to produce ions.
Ionizing radiation is capable of knocking electrons out of their orbits around atoms, upsetting the electron/proton balance and giving the atom a positive charge.
Alpha radiation consists of alpha particles that are made up of two protons and two neutrons each and that carry a double positive charge. Due to their relatively large mass and charge, they have an extremely limited ability to penetrate matter.
We know that,
Iabsorbed=P/A ------(1)
where P is the power and A is the area.
P= E/t-------(2)
using (2) and (1)
Iabsorbed=E/tA-----(3)
Now area,
A=πr^2 = 1.19*10^-5 m^2
putting in (3), we get
Iabsorbed = 1.09*10^7 W/m^2
Given only 90% of the beam is absorbed So,
I/100=1.19*10^-5/90
Now the intensity is,
I=1.19*10^-5*100/90
I=1.21*10^7 W/m^2.
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fire hoses used in major structural fires have an inside diameter of 6.40 cm suppose such a hose carries a flow of 40.0 l/s, starting at a gauge pressure of 1.62 x 106n/m2 the hose rises up 10.0 m along a ladder to a nozzle having an inside diameter of 3.00 cm. what is the pressure in the nozzle?
The pressure in the nozzle greater than 2000.
A diameter of a circle is any instantly line section that passes through the center of the circle and whose endpoints lie at the circle. it could additionally be described because the longest chord of the circle. both definitions also are valid for the diameter of a sphere.
Calculation:-
Volume = 6.4× 3 × 10
= 192cm³
P= nRT/V
= 2000
A nozzle is a device designed to manipulate the course or traits of a fluid glide (especially to increase velocity) because it exits (or enters) an enclosed chamber or pipe.
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If we are severely dehydrated we expect Select one:
a. ADH levels to increase resulting in producing more dilute urine
b. ADH levels to increase resulting in producing more concentrated urine
c. ADH levels to decrease resulting in producing more dilute urine
d. ADH levels to decrease resulting in producing more concentrated urine
Low blood pressure will result in the following levels of hormones Select one:
a. High Renin;high ADH; low aldosterone
b. High Renin; low ADH; low
c. Low Renin;low ADH;low Alsosterone
d ADH:high Aldosterone High Renin high
Oxylate is Select one:
a. Usually associated with uric acid stones
b. Commonly found in foods like spinach
c. Used in the formation of many calcium kidney stone
d. Both a and b e. Both b and c
If we are severely dehydrated, ADH levels increases resulting in more concentrated urine.
Low BP means low GFR produced so Renin is increased, high ADH and high aldosterone.
Oxylate used in formation of calcium stones in kidney.
What is ADH?
ADH is also called arginine vasopressin. A hormone produced in the hypothalamus of the brain and stored in the posterior lobe of the pituitary gland. It tells your kidneys how much water to save.
ADH constantly regulates and balances the amount of water in the blood. Higher concentrations of water increase blood volume and pressure. Osmotic sensors and baroreceptors work in concert with ADH to maintain hydrogen metabolism.
Osmotic sensors in the hypothalamus respond to the concentration of particles in the blood. These particles include sodium, potassium, chloride and carbon dioxide molecules. When particle levels are out of balance or blood pressure is too low, these sensors and baroreceptors direct the kidneys to store or release water to maintain a healthy spectrum of these substances. . It also regulates the body's thirst.
Therefore, If we are severely dehydrated, ADH levels increases resulting in more concentrated urine.
Low BP means low GFR produced so Renin is increased, high ADH and high aldosterone.
Oxylate used in formation of calcium stones in kidney.
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when a weight w is hanging from a light vertical string, the speed of pulses on the string is v. if a second weight w is added without stretching the string, the speed of pulses on this string will now become. true or false?
It is false to say that speed of pulse remains v after adding the second weight w on the vertical string.
We know very well that speed of transverse wave v in a string is given by:
v=√T / √μ
where,
T represents the tension in the string
μ represents the linear mass density defined for the string
Now, in the given situation,
when weight is hanging on light vertical string is W, speed of the wave v is :
v=√W / √μ ----(eq1)
On addition of an additional weight of W, speed of the wave becomes v ' as :
v′ = √2W /√μ -----(eq2)
After comparing eq1 and eq2, we observe that
after addition of same amount of weight in the given light string, speed will increase by √2 times the previous speed.
Hence, the given statement is false.
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find the work done by the force field on a particle that moves along the helix .
Answer:
77
Explanation:
what wavelengths appear in the system's emission spectrum? 4, 1.5, 0
Wavelengths are 310 nm , 827 nm , 496nm
What is wavelength ?Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal carried in space or over a wire.
According to the given information
E = hc/wavelength [tex]10^{-19}[/tex]
a) n=3 to n=1
E = 4.0 - 0.0 = 4.0 eV = 4×1.602 × [tex]10^{-19}[/tex]= 6.40×[tex]10^{-19}[/tex] J
= wavelength = 19.86×[tex]10^{-26}[/tex]/(6.40×[tex]10^{-19}[/tex]) = 3.10×[tex]10^{-7}[/tex] = 310 nm
b) n=2 to n=1
E = 1.5 - 0 = 1.5 eV = 1.5×1.602× [tex]10^{-19}[/tex] = 2.40×[tex]10^{-19}[/tex] J
= wavelength = 19.86×[tex]10^{-26}[/tex]/(2.40×[tex]10^{-19}[/tex]) = 8.27×[tex]10^{-7}[/tex]= 827 nm
c) n=3 to n=2
E = 4.0 - 1.5 = 2.5 eV = 2.5×1.602×[tex]10^{-19}[/tex] = 4×[tex]10^{-19}[/tex] J
= wavelength = 19.86×[tex]10^{-26}[/tex](4×[tex]10^{-19}[/tex]) = 4.96×[tex]10^{-7}[/tex] = 496nm
Wavelengths are 310 nm , 827 nm , 496nm
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Describe specific heat and explain one way that this is important to humans.
Water has a high specific heat, thus it takes a lot of heat to raise its temperature. This keeps the surroundings from getting overly hot or chilly.
Why is specific heat crucial for the human body?A substance can absorb more heat energy before changing when it has a high specific heat. 70% of the human body is made up of water. Thus, the high specific heat of water ensures that the body's temperature is maintained. Additionally, it functions as a heat energy regulator.Water has a high specific heat, thus it takes a lot of heat to raise its temperature. This keeps the surroundings from getting overly hot or chilly. Humans contain around 66% water, so this feature of water also aids in the regulation of our body temperature.To learn more about Specific heat refer to:
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Which of the following is the correct relationship of wavelength and frequency of EM waves?
a) λ = c / r
b) λ = c / f
c) λ = c / h
d) λ = h*c / f
Answer:
c=f⋅λ (The speed of light is directly proportional to f and λ).
Explanation:
g find the net electric force that the two charges would exert on an electron placed at point on the x-axis at x = 0.200 m.express your answer with the appropriate units. enter positive value if the force is in the positive x-direction and negative value if the force is in the negative x-direction.
The net electric field on charges are -537 N/C.
The electric field is a vector magnitude, so we must add them as vectors. The electric field equation is
E = k q / r²
Where k= Coulomb constant that you are worth 8.99 * 10⁹ N m²/C², that the magnitude of the load and r = distance between the load and the test load.
Let's find the field created by each charge at the point x = 0.200 m
Charge 1
This charge is at the origin, the distance is
x₁ = 0.200 m
q₁ = 3 nC = 3 * 10^-9 C
E1 = k q₁ / x₁²
E1 = 8.99 * 10⁹ * 3* 10⁻⁹ / 0.2²
E1 = 674.25 N / C
Charge 2
This load is the point a = 0.800 m, so the distance to the test charge at 0.200 m
x₂ = 0.800 - 0.200
x₂ = 0.600 m
q₂ = -5.5 nC = -5.5 * 10-9 C
E2 = 8.99 * 10⁹ * 5.5 * 10⁻⁹ / 0.600²
E2 = 137.35 N / C
We already have the value of each field, add them vectorially, remember that if the charges are of the same sign they repel and if they are of the opposite sign they attract, the field E1 is directed to the left and the field E2 is directed to the right.
Et = -E1 + E2
Et = -674.25 + 137.25
Et = -537 N / C
The field is headed to the left.
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Which of the following, if eliminated, would completely prevent the greenhouse effect from occurring on earth?
A. Chlorofluorocarbons (Incorrect)
B. Clouds (Incorrect)
C. Fossil fuels (Incorrect)
D. Acid rain
E. The ozone layer
F. Atmosphere
The green house gases can be reduced up to a limit by eliminating the fossil fuels and chlorofluorocarbons. Fossil fuels are the major source of greenhouse gases.
What are green house gases?Greenhouse gases are those which are capable of intense absorption of the temperature radiated from the earth's surface and make the earth atmosphere warm up.
Greenhouse gases are the main cause of global warming. Carbon dioxide, methane oxides of nitrogen and sulphur are the green house gases.
Fossil fuels are rich in hydrocarbons and they release these gases when burned. Mainly methane and other hydrocarbon gases intensely absorbs the temperature which is radiating away from the earth and thus the heat is trapped inside.
Therefore, by eliminating fossil fuels, greenhouse effect can be prevented.
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