In general, if there are n>3 lines in the plane. Then we can say that at least n-2 triangles are formed by these lines.
A triangle needs a minimum of three lines to be formed. The sum of two sides of triangle is said to be greater than the third side.
Let us consider the following diagram, where each line is labelled with a letter, A-B-C-D-E
As each line intersects with at least one other line, there are at least n-2 triangles that can be formed. For example, triangle ABC, triangle ABD, triangle ABE, triangle BCD, triangle BDE, triangle CDE are the triangles that can be formed from our five lines.
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measuring the pulsation period of an rr lyrae variable star will reveal its
Measuring the pulsation period of an RR Lyrae variable star will reveal its astronomical distance.
What is the period of pulsation of an RR Lyrae star?An RR Lyrae star has a short pulsation period of 0.2 days to 1 day or within 5 to 24 hours. The period of pulsation of RR Lyrae variable is dependent on its mass, temperature and luminosity. Through the inverse square law, the difference between the measured luminosity allows the distance to be determined.
RR Lyrae's brightness also allows astronomers to measure changes in spectral type and detect emission lines present in the variable star.
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The speed of a wave is 25 m/s and the wavelength is 0. 10 m. What is the frequency of the wave?.
Air loss in a single vehicle (not comb. vehicle) should not be more than _________with engine off and 'brakes on'.
a) 3 psi in one minute
b) 2 psi in 45 seconds
c) I psi in one minute
d) I psi in 30 seconds
Label the spinal cord meninges and spaces. 02:00:12 Skipped Reset Zoom Subarachnoid Arachnoid mater Dura mater Subdural Pia mater space space 7
The label from superficial to deep, of meninges and their related spaces in the correct order are:
1. Dura mater
2. Subdural space
3. Arachnoid mater
4. Subarachnoid space
5. Pia mater
What is the proper sequence of the meninges, from the superficial to the deep?The brain and spinal cord are shielded by three layers of membranes called meninges. Pia mater is the thin inner layer. The arachnoid, a structure resembling a web and filled with fluid, is the middle layer and protects the brain. The durable outer layer is known as the dura mater.
The subdural space is the area that could be found between the arachnoid mater and the meningeal layer of the dura. The subdural space typically only exists in pathological conditions, similar to the epidural space.
Therefore, Between the dura mater of your spinal cord, the bones of your vertebral column, and the dura mater of your skull is a space called the epidural space.
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A weight of 2. 0 N i hung from a pring. The extenion produced i 6. 0 cm. The 2. 0 N weight i
removed and an 8. 0 N weight i hung from the pring. The pring doe not pa it limit of
proportionality. What i the new extenion of the pring?
A 6. 0 cm B 24 cm C 36 cm D 48 cm
When a 2.0 N weight is removed by us and an 8.0 N weight is hung from the spring, the new extension of the spring is 24 cm.
The extension of the spring is known to be directly proportional to the weight which hangs from it. The extension of an object is directly proportional to the force on it.
We can say, in other words, that If the force applied is doubled, the extension doubles. If no force is applied, there is no extension. The graph of force versus extension is a straight line through the origin, which shows a linear relationship.
W∝ x
W= K x
This means,
W1=Kx1 and W2= Kx2
So, we have a relationship,
W1/x1=W2/x2
2/6= 8/x2
so we have,
x2=24 cm.
The length of the spring will be 24 cm in this case.
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There has been a lot of attention given to Jupiter’s moon Europa as a possible site where life might be found. What do you think that life (if there indeed is any) might be like (be sure to consider the conditions we believe exist in the ocean under Europa’s ice crust)? What ideas might you have for how scientists could explore Europa’s ocean?
Scientists could explore Europa’s oceans by using potent technologically advanced telescopes capable of deciphering the content beneath the ice crust.
What are potent technologically advanced telescopes?The latest technologically advanced telescopes are potent optical devices that allow us to discover the presence of certain compounds not only in the atmosphere of other planets in the solar system but also the content on the surface (e.g, the water content).
These telescopes contain curved mirrors that gather and focus different spectra of light from the sky such as the Webb telescope which was launched by NASA in the final of 2021.
Therefore, with this data, we can see that technologically advanced telescopes are potent optical instruments that can be used to observe the presence of different compounds including water on the surface of a planet or its satellites such as in the case of Europe which is a satellite of Jupiter.
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put the pairs of atoms in order, with the pair that has the biggest electronegativity difference between the two atoms at the top of your list
The pair that has the biggest electronegativity difference between the two atoms at the top of your list is given below:
Flourine and FranciumChlorine and CesiumNitrogen and SodiumPhosphorus and LithiumNitrogen and Sulphur.Why is higher electronegativity significant?In a covalent bond, an atom's ability to draw shared electrons is referred to as electronegativity. The strength with which an element attracts the shared electrons depends on the value of its electronegativity.
Therefore, An atom's or functional group's propensity to draw electrons to itself is known as electronegativity, which is a chemical property. An atom's electronegativity is influenced by both its atomic number and the separation of its valence electrons from its charged nuclei.
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See full question below
Put the pairs of atoms in order, with the pair that has the biggest electronegativity difference between the two atoms at the top of your list. Fluorine and Francium, Phosphorus and lithium, nitrogen and sodium, Chlorine and cesium, nitrogen and sulfur.
pulley (in the form of a uniform disk) with mass mp and radius rp is attached to the ceiling in a uniform gravitational field g and rotates with no friction about its pivot. mass m2 is larger than mass m1, and they are connected by a massless inext
a ) The relationship between the tension T1 and m1g is T1 > m1a
b ) The relationship between the magnitudes of the accelerations is I a1 I = I a2 I
Since m2 is larger than m1, the m2 will move downwards while m1 moves up. So the net force is given by,
∑ Fy = T1 - W1
m1 a = T1 - m1 g
T1 = m1 a + m1 g
So T1 > m1a
Since it is a single system connected through a pulley, the acceleration of m1 and M2 will be of same magnitude but in opposite directions.
a1 = - a2
I a1 I = I a2 I
Therefore,
1 ) T1 > m1a
2 ) I a1 I = I a2 I
The given question is incomplete. The complete question is:
A pulley (in the form of a uniform disk) with mass M, and radius Rp is attached to the ceiling in a uniform gravitational field g and rotates with no friction about its pivot. Mass M2 is larger than mass m1, and they are connected by a massless inextensible cord. T1, T2, and T3 are magnitudes of the tensions. The system is shown in the image attached.
1 ) What is the relationship between the tension T1 and m1g?
2 ) What is the relationship between the magnitudes of the accelerations?
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brightness is to light as ________ is to sound.
Brightness is to light as loudness is to sound.
What is Brightness?Brightness is the visual attribute by which a light source appears to emit or reflect light. In other words, brightness is the perception caused by the brightness of a visual object. Not necessarily proportional to luminance.
What is loudness?Loudness is often confused with volume. However, the two terms are completely different concepts. Loudness is a scientific measure of the amount or strength of sound. Loudness, on the other hand, is much more difficult to quantify as it is entirely subjective and based solely on your personal perception of sound. The frequency content, duration, and loudness of a sound are factors in how loudness is perceived.
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While rolling on the pool table, ball X has 16.00 J of kinetic energy. It collides with identical ball Y and ball X stops, but ball Y moves on with 15.75 J of kinetic energy. What causes the loss of energy?
Inelastic collision and a host of other factors causes the loss of energy.
What is kinetic energy?Kinetic energy of an object is the energy that it possesses due to motion.
It can be defined as the work needed to accelerate a body of a given mass from rest to its stated velocity. When it has gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes.
In an inelastic collision which is the case of ball X and Y, the kinetic energy of the system is not conserved. The energy that you find lost has been dissipated as other forms of energy. This can be heat, friction, vibrational energy transferred to atoms of the colliding particles, energy lost to deform the atomic structure etc.
In conclusion, the inelastic collision nature of the two balls results in the loss of energy through different forms.
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what is the function of the diaphragm on a microscope
The function of a diaphragm on a microscope is to control the amount of light that reaches the specimen.
What is a microscope?Microscope is an optical instrument that is used for observing relatively small objects. The microscope allows us see very small things that our eyes otherwise couldn't see.
Their ability to function is because they have been constructed with special components that enable them to achieve high magnification levels.
Some of the components of microscope are as follows;
Eye pieceObjective lensNose pieceDiaphragm or irisAdjustment knobStageCondenserApertureThe primary role of the diaphragm is to control the amount of light that reaches the specimen.
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now consider the gaussian surface s2. with the charge still inside the cavity, what is the electric flux, in newton squared meters per coulomb, through surface s2?
Gauss's law states that the total electric flux through any closed surface is proportional to total electric charge inside the surface.
The electric flux is the measure of the electric field through a given surface. The electric field is the gradient of the potential. The density of the lines corresponds to the electric field strength, which could also be called the electric flux density. Electric flux is proportional to the total number of electric field lines going through the surface.
Electric flux has SI units of volt meters or equivalently newton meters squared per coulomb. Thus, the SI base units of electric flux are kg m3s -3*A-1.
The quantity EA1 is the electric flux through S1. We represent the electric flux through an open surface like S1. Electric flux is a scalar quantity.
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Chapter 22 Match the structure of fetal circulation with what it becomes at birth or shortly after birth. Umbilical arteries [Choose) Umbilical vein [Choose Ductus venosus Choose Foramen ovale [Choose Ductus arteriosus [Choose Chapter 22 Match the structure of fetal circulation with what it becomes at birth or shortly after birth. Umbilical arteries Umbilical vein [Choose ] Fossa ovalis Medial umbilical ligaments Ligamentum teres Ligamentum capillarius Azygous vein Splenic vein Ligamentum arteriosum Ligamentum venosum Ductus venosus Foramen ovale [Choose) Ductus arteriosus [Choose
The structures within the fetal circulation are correctly matched with what they become after birth as follows:
a. Umbilical arteries: The internal iliac and superior vesical arteries.b. Umbilical vein: Fibrous cord.c. Ductus venosus: Ligamentum venosum.d. Foramen ovale: It becomes the patent when it's still opend after birth.e Ductus arteriosus: Ligamentum arteriosum.What is meant by fetal circulation?The fetal circulation simply refers to the transport system which is in function during the development of fetus in the uterus of a pregnant woman. However, the structures which makes up this circulation becomes another structure after birth or shortly after birth. For example, the Ductus venosus in the fetal circulation becomes the ligamentum venosum after the child is being given birth too.
In conclusion, we can now confirm from the explanation given above that some structures in the fetal circulation are entirely different from the ones in adult circulation.
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what is the purpose of heat fixing
The main purpose of heat fixation is to kill the bacteria as it immobilizes the bacteria and adheres them to the slide being used.
What is heat fixation?Heat Fixation can be used for the fixation of single-cell organisms, most generally bacteria, and archaea. The organisms are commonly mixed with water or physiological saline to evenly spread out the sample.
Once diluted, the sample was spread onto a microscope slide. This diluted bacteria sample is referred to as a smear after it is put on a slide. After a smear is dried at room temperature, the slide is kept by tongs and passed through the flame of a Bunsen burner many times to heat-kill as well as adhere the organism to the slide.
After heating, samples are stained and imaged using a microscope. Heat fixation keeps overall morphology but not internal structures.
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if a galaxy is moving away its hydrogen lines will shift toward the end of the spectrum.
When a source of light waves is moving away from the observer, the light waves appear to be dispersed. If the galaxy weren't moving, the spectral lines observed in the galaxy would be at shorter wavelengths.
Because the relationship between wave frequency and wavelength is inverse, gamma rays have incredibly short wavelengths that are barely a fraction of the size of atoms, whereas other wavelengths can go as far as the universe. Regardless of the medium they travel through, electromagnetic radiation's wavelengths are commonly represented in terms of the vacuum wavelength, even though this isn't always mentioned explicitly.
The wavelength of electromagnetic radiation affects its behavior. The speed of light is equal to wavelength times frequency. Frequency multiplied by the Planck constant equals energy. 1/wavelength is the wave number in cm. Along with the wavelengths of different parts of the electromagnetic spectrum, a rough estimation of the wavelength size is displayed..
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Identify the true statement about people with low self- esteem. A. They prefer understanding responses even if they are negative. B. They usually choose less desirable partners. C. They are usually less prone to loneliness and eating disorders. D. Hey are most likely to ignore and neglect others' worst behaviors.
People with low self- esteem are usually prone to loneliness and eating disorders.
Self-esteem, as a dimension sensitive to events -both internal and external- varies throughout your life.This happens because the perception of your personal worth is closely linked to the positive and negative milestones of your history.One of the main characteristics of people with low self-esteem is negative self-talk. In fact, they establish an internal dialogue in which their achievements, growth, or efforts – the elements that speak well of them – are omitted.People with low self-esteem tend to be insecure and indecisive.One trait of low self-esteem is often a lack of assertiveness. In other words, a reduced ability to clearly express their wants and needs.Emotional dependence and idealization of others are also characteristics of low self-esteem. In fact, these people might build ideally perfect versions of those close to them, especially those on whom they emotionally depend.To know more about human behaviour visit:
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A ball rolls horizontally off of a 120 m cliff with a velocity of 6 m/s. How far from the base of the cliff will it land?
The distance from the base of the cliff 120 m high the ball will land is 29.7 m.
What is distance?Distance is the length between two points.
To calculate the distance from the base the ball will land, we use the formula below.
Formula:
R = u√(2h/g)........... Equation 1Where:
R = Distance from the base of the cliff, where the ball landsh = Height of the cliffg = Acceleration due to gravityu = Intial velocityFrom the question,
Given:
u = 6 m/sh = 120 mg = 9.8 m/s²Substitute these values into equation 1
R = 6√(2×120/9.8)R = 6√24.49R = 6×4.95R = 29.7 mHence, the distance from the base of the cliff the ball will land is 29.7 m.
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a truck moves with a speed of 90 km/h for 45 mins and 120 km/h for next 20 mins find average speed
Average speed a truck moves with a speed of 90 km/h for 45 mins and 120 km/h for next 20 mins is 40.72km/h.
Average speed = Total distance / Total time
S = 73.3/ 1.8
S = 40.72km/h
Given:
90 km/h is the speed.
Time = 0.75 hours * 45 minutes
To calculate the distance travelled, substitute the following values into the distance formula:
Distance (D) is equal to the product of speed and time, hence D = 90 * 0.75 = 33.75 km.
Given:
120 km/hr speed
Time = 20 minutes = 0.3333 hours
To calculate the distance travelled, substitute the following values into the distance formula:
Consequently, the distance travelled overall is:
Distance equals speed times time, so D = 120*0.33 D = 39.6 km.
Distance is a measurement of how far apart two things or points are, either numerically or occasionally qualitatively. Distance can refer to a physical length in physics or to an estimate based on other factors in common usage.
Use the formula d = st, or distance equals speed times time, to find the distance.
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the modified mercalli intensity scale is used to measure _______.
Answer: Intensity of earthquakes
Explanation:
The Mercalli intensity scale is a scale to measure the intensity of earthquakes. Unlike the Richter scale, the Mercalli scale does not take into account the energy of an earthquake directly. Rather, they classify earthquakes by the effects they have.
Describe where x-rays are found on the ems compared to the other six forms of radiation. In your description, compare and contrast its wavelength, frequency and energy with those of other regions of the ems.
X-rays are electromagnetic radiation with a high frequency and energy. They have frequencies between 3 and 1016 Hz and wavelengths between 0.01 to 10 nanometers. They are discovered to exist in the electromagnetic spectrum's region between ultraviolet and gamma rays.
What distinguishes X-rays from other electromagnetic waves?
X-rays are a part of the electromagnetic spectrum. Light waves get more energetic as their wavelengths shorten. X-rays are more energetic because they have shorter wavelengths. When discussing X-rays, we frequently refer to their energy rather than its wavelength.
What kind of wavelength description would be appropriate for X-rays?Compared to ultraviolet light, x-rays have far higher energies and shorter wavelengths; therefore, scientists normally talk about x-rays in terms.
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Crane with 5 kW motor lifts the load evenly at a speed of 0.1 m/s. What is the weight of the cargo?
Answer: 0.5
Explanation:
Thermodynamics 2 QUESTION 3 A stationary gas-turbine power plant operates on a simple ideal Brayton cycle with air as the working fluid. The air enters the compressor at 95 kPa and 290 K and the turbine at 760 kPa and 1100 K. Heat is transferred to air at a rate of 35,000 kJ/s. Compare the power delivered by for the following assumptions: a. assuming constant specific heats at room temperature b. accounting for the variation of specific heats with temperature.
Assuming constant specific heats at room temperature, the power delivered by gas-turbine power plant that operates on a simple ideal Brayton cycle with air as the working fluid is 15678.25 KW
P1 = 95 KPa
T1 = 290 K
T3 = 1100 K
P2 = P3 = 760 KPa
Qin = 35000 KJ / s
At constant specific heats at room temperature,
R = 0.287 KJ / Kg K
cp = 1.005 KJ / Kg K
cv = 0.718 KJ / Kg K
K = 1.4
Pressure ratio, rp = P2 / P1
rp = 760 / 95
rp = 8
Efficiency, η = Wnet / Qin
1 - 1 / [ ( rp )^( ( k - 1 ) / k ) ] = Wnet / Qin
Wnet = 35000 * 1 - 1 / [ ( rp )^( ( 1.4 - 1 ) / 1.4 ) ]
Wnet = 35000 * 0.44795
Wnet = 15678.25 KW
Therefore, the power delivered is 15678.25 KW
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Based on observations, which of the following statements about stars in the Milky Way is generally true?
The older the star, the lower its abundance of heavy elements.
The less massive the star, the older it is.
The older the star, the bluer its color.
The older the star, the faster its orbital speed.
The younger the star, the higher its mass
Stars in the Milky Way, the older the star, the lower its abundance of heavy elements.
An element is a substance that can not be damaged down into a simpler layout. They may be distinguished by means of a completely unique atomic range. The elements are organized via their atomic variety in the periodic table, which highlights elements with similar residences.
Carbon is the most important detail of existence. Without this detail, existence, as we are aware of it, might not exist. As you will see, carbon is a vital element in compounds essential for lifestyles.
Kinds of elements :
1.) The elements are categorized as metallic, non-metal, and metalloid.
2.) The intense left aspect factors inside the periodic desk are metals, for example, sodium, calcium, cesium, and many others.
3) Elements such as non-metals, carbon, chlorine, oxygen, and many others.
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In hydrogen, the transition from level 2 to level 1 has a rest wavelength of 121.6 nm.Find the speed for a star in which this line appears at wavelength 120.6 nm.Express your answer to three significant figures and include the appropriate units.
The transition from level 2 to level 1 in hydrogen has a rest wavelength of 121.6 nm. The speed of a star with this line at 120.6 nm wavelength is 2500 km/s forces.
How is an object's speed related to its velocity?Speed is the pace at which an object moves along a path in time, whereas velocity is the rate and direction of movement. In other words, velocity is a vector, whereas speed is a scalar value. People may believe that average speed and average velocity are simply different names for the same quantity, but average speed is affected by distance, whereas average velocity is affected by displacement. If an object reverses direction throughout its travel, the average speed exceeds the magnitude of the average velocity. Speed was the absolute value of velocity in one variable calculus. It is the magnitude of the velocity in vector calculus.
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What is the magnitude b of the magnetic field at the location of the charge due to the current-carrying wire?.
Using the right hand rule, it is possible to calculate the magnetic field direction at the site of the charge caused by the current-carrying wire.
In the simplest terms possible, what is a magnetic field?The region surrounding a magnet where the effects of magnetism are perceived is known as the magnetic field. To explain how the magnetic force is dispersed in the area surrounding and inside something magnetic in nature, we utilize the magnetic field as a tool.
How does the magnetic field function?The same poles resist one another whereas opposite poles are attracted to one another. The north-seeking poles of the iron's atoms line up in the same way when you rub it against a magnet.
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what is the maximum mass of block a for which the system remains in static equilibrium? express your answer with the appropriate units.
Mass is one of the fundamental properties of an object in Physics, and is a measurement of how much matter there is in something.
How to finding Mass from Density and Volume?Look up the object's density. Density measures how tightly the matter in an object is packed together. Each material has its own density, which you can look up online or in a textbook. The scientific unit of density is kilograms per cubic meter (kg/m3), but you can use grams per cubic centimeter (g/cm3) for smaller objects.Matter is any substance that you can touch — anything that takes up physical space and has volume. Use this formula to convert between these units: 1,000 kg/m3 = 1 g/cm3The density of liquids is often measured in kilograms per liter (kg/L) or grams per milliliter (g/mL) instead. These units are equivalent: 1 kg/L = 1 g/mL.Example: Diamond has a density of 3.52 g/cm3. 2. Measure the object's volume. The volume is the amount of space the object occupies. Measure the volume of solids in cubic meters (m3) or cubic centimeters (cm3), and the volume of liquids in liters (L) or milliliters (mL). The formula for volume depends on the shape of the object. Refer to this article for common shapes.Use the same unit that appears as part of your density measurement.Example: Since we measured the density of diamond in g/cm3, we should measure our diamond's volume in cm3. Let's say our diamond's volume is 5,000 cm3. 3. Multiply the volume and density together. Multiply your two numbers together, and you'll know the mass of your object.[1] Keep track of the units as you do this, and you'll see that you end up with units of mass (kilograms or grams).Example: We have a diamond with volume 5,000 cm3 and density 3.52 g/cm3. To find the diamond's mass, multiply 5,000 cm3 x 3.52 g/cm3 = 17,600 grams.To learn more about Equilibrium refer to:
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Correctly label the following anatomical parts of a kidney. The designations of "cortex" and "medulla' are misleading, perhaps because of differences in mammalian kidney structure among different species. Cortex refers to the outer perimeter and medulla comprises the pyramids and columns However, there is no fundamental difference between the composition of the cortex and that of the columns, both contain corpuscles that project tubules into the pyramidal regions. Renal medulla Renal cortex Major calyx Minor calyx Fibrous capsule Renal pyramid Renal column Correctly label the following anatomical parts of a kidney. The designations of "cortex" and "medulla" are misleading, perhaps because of differences in mammalian kidney structure among different species. Cortex refers to the outer perimeter , and medulla comprises the pyramids and columns However, there is no fundamental difference between the composition of the cortex and that of the columns, both contain corpuscles that project tubules into the pyramidal regions. Renal medulla Renal cortex Major calyx Minor calyx Fibrous capsule Renal pyramid Renal column
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Correct label the following anatomical parts of a kidney are
Left Top to bottom:
- Fibrous capsule
- Renal pyramid
- Renal column
- Minor calyx
- Major calyx
- Renal Cortex
- Renal Medulla
What is kidney?One of two organs in the abdomen. Kidneys remove waste and excess water (such as urine) from the blood and balance chemicals (such as sodium, potassium, and calcium) in the body. Kidneys also produce hormones that help control blood pressure and stimulate the bone marrow to make red blood cells.
Kidney function:
Remove waste and excess liquid.Control blood pressure. make red blood cells.Keep your bones healthy.Check pH.To know more about kidney, visit:
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Which process is required to allow a gravitationally-collapsing gas cloud to continue to collapse?.
Most of the cloud's thermal energy must be radiated away.
The cloud must constantly produce new dust particles. A collision with another cloud is required. Most of the cloud's thermal energy must be trapped there. Star formation depends significantly on angular momentum.
Low, dense clouds mainly serve to deflect solar energy and chill the Earth's surface. High, thin clouds mostly reflect incoming solar radiation; but, they also trap part of the infrared radiation that the Earth emits and reflect it back down, warming the Earth's surface.
The amount of emission from a cloud changes directly with its temperature in addition to being influenced by a number of other elements, including the thickness of the cloud and the composition of the cloud.
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a child jumps on a trampoline. draw energy bar diagrams to show the forms of energy present in the following situations.
a. the child is at the highest point.
b. the child is at the lowest point
Answer:
a
Explanation:
Three containers are used in a chemistry lab. All containers have the same bottom area and the same height. A chemistry student fills each of the containers with the same liquid to the maximum volume. Which of the following is true about the pressure on the bottom in each container? (A) P, > P2>P3 (B) P,
P3 (D) P: > P2
P1=P2=P3 is true about the pressure on the bottom in each container.
P=F/A
same area and same force lead to same pressure.
Pressure is defined as force/area. To calculate the pressure that snow exerts on a roof, divide the weight of the snow by the roof's surface area. Gases are a typical pressure source in physics. A "vacuum" is used to describe the absence of pressure. People have long held the belief that vacuums are improbably rare and unnatural because "nature abhors a vacuum." Actually, this is not the case.
The number of pressure units is ridiculous. The units torr or mmHg are frequently employed. The only subject of conversation is the height of a mercury column. The atmosphere contains 760 torr, or mmHg. You could also look at mmH2O, which makes use of a related idea.
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