At your annual physical exam the nurse takes your blood pressure and records it as 130/110. why is the diastolic pressure a concern but systolic is not?

Freezing is the process by which a substance changes its state from a liquid to a solid, requiring the removal of energy through cooling. Water turning into ice is an example of freezing.

Freezing is the process by which a substance changes its state from a liquid to a solid due to the reduction of temperature. During freezing, the molecules in the substance lose energy and slow down, eventually coming together in a more organized and tightly packed structure, forming a solid.

In order for a substance to freeze, it requires the removal of energy from the substance. This is because the kinetic energy of the molecules needs to be reduced so that they can come together in a more ordered arrangement. This energy removal is typically done by cooling the substance, either by decreasing the temperature or by exposing it to a cold environment. As energy is removed from the substance, the temperature of the substance drops until it reaches its freezing point, at which point it solidifies.

An example of freezing is the process of water turning into ice. When water is cooled below its freezing point of 0 degrees Celsius (32 degrees Fahrenheit), the energy is removed from the water, and its molecules begin to slow down and lose kinetic energy. Eventually, the water molecules form a lattice structure, and the water becomes solid ice. Similarly, other substances can also freeze when their temperature is reduced below their freezing point, such as when liquid nitrogen is cooled to a low enough temperature to solidify.

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Hair density is a term used to describe the amount of hair follicles on an individual's scalp. It ranges from thick to thin, with some people having a higher number of follicles per unit area than others. To measure hair density, experts typically use a metric known as "hairs per square A. inch."

This measurement is taken by counting the number of hair follicles present in a given area of the scalp, usually around the crown or vertex. The number of hairs present in this area can vary depending on factors like genetics, age, and health.
While hair density can be affected by various factors, it is generally considered to be an inherited trait. People with thick, dense hair often have a higher number of hair follicles per square inch, while those with thinner hair may have fewer follicles.
In addition to genetic factors, other factors that can affect hair density include stress, hormonal changes, and certain medical conditions. Hair loss, for example, can lead to a decrease in hair density over time.
Overall, measuring hair density per square inch is an important way for hair experts to assess an individual's hair health and determine the best course of treatment for any hair-related issues they may be experiencing.

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Answer:

Q = 41800[J]

Explanation:

These types of problems can be solved using the following heat transfer equation for quarps that increase or decrease their temperature as a function of mass.

\(Q=m*C_{p}*DT\)

where:

Q = Heat absorbed [J]

m = mass = 2 [kg]

DT = temperature change = 5 [°C]

Cp = specific heat of the water = 4180 [J/kg*°C]

\(Q=2*4180*5\\Q=41800[J]\)

Units of energy (Joules) [J]

Ultra = X-ray

Explanation:

how are things going to paint the roof for beginners painting and decorating the whole house so I'm going away with a few sports mates for a couple nights for beginners but will have a look painting at a time and see what is going to be Strong enough

The given series, 1 + 7n Σ 57 n = 1, is divergent because the terms in the series continue to increase without bounds, the sum of the series also increases indefinitely.

To determine the convergence or divergence of the series, we can analyze its behaviour as n approaches infinity. The series can be written as Σ(1 + 7n*57) for n = 1 to infinity. By simplifying the expression, we have Σ(399n + 1) for n = 1 to infinity.

As n increases, the summand of the series grows linearly with a coefficient of 399. Since the coefficient is nonzero and positive, the series will diverge. This means that the sum of the series will not approach a finite value as n tends to infinity.

Therefore, the given series is divergent, and we cannot find its sum. It is important to note that a divergent series does not have a finite sum. Therefore, the sum of the given series is "DIVERGES."

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Jim Crow laws was the legal measure which allowed whites in southern states to keep blacks from voting after reconstruction ended.

These were the state and local laws which enforced racial segregation in the Southern part of the United States.

Due to this laws, whites in southern states kept blacks from voting after reconstruction ended.

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Answer:

light waves :)

Explanation:

Answer:

15

Explanation:

speed = distance/time

distance = 60 meters

time = 4 seconds

speed = 60/4= 15 ms-¹

Speed:-

This is due to the fact that occluded fronts combine two cold air masses, which causes one of the cold air masses to go downward.

When a warm air mass is sandwiched between two cold air masses, an occluded front occurs. In an occlusion, the warm front passes over the cold front, which dives beneath it.

In a front is obscured, the warm front is fully supplanted by the cold front, in which the warm air masses have completely disappeared. Furthermore, there are frequent shifts in the various weather producing circumstances because of the cold front's relatively low temperature.

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the answer is c because it has the most volts

a

Answer:

I=V/R is the formula for ohm's law .

Explanation:  I=V/R is the formula for ohm's law

Answer:

I= V/R

Explanation:

The equation, i = v/r, tells us that the current, i, flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. (Study.com)

The new volume of the gas is approximately 40 ml. This result makes sense, as increasing the pressure of the gas while keeping the temperature constant will result in a decrease in volume, according to Boyle's Law.

To calculate the new volume of the gas, we can use Boyle's Law formula, which states that the pressure and volume of a gas are inversely proportional, provided that the temperature and amount of gas remain constant.

Mathematically, Boyle's Law can be expressed as \(P_1V_1 = P_2V_2\), where \(P_1\)and \(V_1\) are the initial pressure and volume, and \(P_2\) and \(V_2\) are the final pressure and volume.

In this case, we know that the initial volume \(V_1\) is 50 ml, the initial pressure \(P_1\) is 81.0 kPa, and the final pressure \(P_2\) is 101.3 kPa. We can plug these values into the Boyle's Law formula and solve for \(V_2\):

\(P_1V_1 = P_2V_2\)

\(V_2 = \frac{P_1V_1}{P_2}\)

\(V_2\) = (81.0 kPa x 50 ml) / 101.3 kPa

\(V_2\) = 40 ml (rounded to two significant figures)

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The velocity of the water is 0.4383m/s.

Industries require accurate mass flow measurement for smooth control of various operations. Plant efficiency and product quality also depend on the liquid mass flow rate. Mass flow measurement is always recommended for precision measurements because mass is neither created nor destroyed and mass flow rate is not affected by temperature or pressure changes during the process. Velocity is a measure of the speed of liquid movement per unit of time. Mass flow rate is related to the amount of fluid flowing through a passage per unit time.

Mass flow rate of water= 8 kg/s

Diameter of  pipe=6 inch=0.1524m

now

 velocity(V) of water=m/ρA

 Where m=mass

              ρ=density of water

              A= cross section area

             \(V= \frac{m}{ρ*\frac{\pi d^{2} }{4} }\)

             \(V= \frac{8}{1000*\frac{\pi (0.1524)^{2} }{4} }\)

             V=0.4383m/s

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a) The free length of the spring is 51.84 inches

b) The pitch of this spring 0.06 inches

c) The  force is needed to compress the spring to its solid length 277 lb.

d) The spring rate is 230.8 lb/in.

e)The spring buckle in service  758 lb

a) The solid height of the spring can be calculated using the formula:

\(Solid height = Total number of coils x Wire diameter\)

Solid height = 16 x 0.075 = 1.2 inches

The free length of the spring is the sum of the solid height and the length of wire used to make the 16 coils. The length of wire used to make 16 coils is given by:

Length of wire used = π x (Outside diameter + Wire diameter) x Number of coils

Length of wire used = π x (0.960 + 0.075) x 16 = 50.64 inches

Therefore, the free length of the spring is:

Free length = Solid height + Length of wire used

Free length = 1.2 + 50.64 = 51.84 inches

b) The pitch of the spring is the distance between successive coils. It can be calculated using the formula:

Pitch = Outside diameter / Total number of coils

Pitch = 0.960 / 16 = 0.06 inches

c) The force required to compress the spring to its solid length can be calculated using the formula:

\(Force = Spring rate x Distance compressed\)

The distance compressed is the solid height of the spring, which is 1.2 inches. The spring rate can be estimated using the formula:

Spring rate = Gd^4 / 8ND^3

where G is the modulus of rigidity of the material (given), d is the wire diameter, N is the total number of coils, and D is the mean coil diameter (outside diameter minus wire diameter).

Using the given values, we get:

Spring rate = 11.5 x 10^6 psi x 0.075^4 / (8 x 16 x 0.885 x 0.885^3)

Spring rate = 230.8 lb/in

Therefore, the force required to compress the spring to its solid length is:

Force = 230.8 lb/in x 1.2 in = 277 lb

d) The spring rate is 230.8 lb/in.

e) The critical buckling load of the spring can be estimated using the formula:

Critical buckling load = π^2EI / (KL)^2

where E is the modulus of elasticity of the material, I is the second moment of area of the cross-section, K is the effective length factor, and L is the length of the spring. The effective length factor depends on the end conditions of the spring, which are plain and ground in this case.

Assuming a conservative effective length factor of 0.8, we get:

Critical buckling load = π^2 x 30 x 10^6 x 0.000184^4 / (0.8 x 51.84)^2

Critical buckling load = 758 lb

Since the estimated compressive load is well below the critical buckling load, the spring is not expected to buckle in service.

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False. Microtubules are not constant in length. Microtubules are dynamic structures that can undergo growth and shrinkage through a process called dynamic instability. This dynamic behavior allows microtubules to perform various functions within cells, including providing structural support, facilitating intracellular transport, and participating in cell division.

During dynamic instability, microtubules can undergo polymerization (growth) by adding tubulin subunits to their ends or depolymerization (shrinkage) by losing tubulin subunits. This dynamic behavior enables microtubules to adapt and reorganize in response to cellular needs.
Therefore, the statement "Microtubules are constant in length" is false.

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The correct option for the given question is D. Decreasing the mass of the box and releasing the ball from a higher point on the hill.

 A cardboard box was placed at the bottom of a hill, and a ball was released from a point on the hill. The box moved a distance of 2 meters before coming to rest, along with the ball. To move the box a greater distance, a change in the initial conditions is required. It can be achieved by decreasing the mass of the box and releasing the ball from a higher point on the hill.

According to the law of conservation of momentum, the total momentum before and after the collision is conserved. If the mass of the box is decreased, its momentum will be less after the collision. Therefore, the momentum of the ball will be greater than the momentum of the box, allowing it to move the box to a greater distance. Thus the correct option is Option D.

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The velocity of the golf ball is 65.2 m/s

The principle of conservation of momentum is that the momentum before collision is equal to the momentum after collision.

Given that;

(0.2kg *  55 m/s) + (0.046kg * 0 m/s) = (0.2kg * 40 m/s) + (0.046kg  * v)

11 = 8 + 0.046v

v = 11 - 8/0.046

v = 65.2 m/s

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Formula of

Line segment

is AB =

\(\sqrt{(x_{2} -x_{1} )^{2} } +\sqrt{(y_{2} -y_{1} )^{2} }\)

Line segment

is a part of line with definite length. It has two ending points whereas a line has no end points and extended infinitely in both the direction. Line which joins both ending points with possible shortest way is known as

Line segment

.

            A ______________________ B    

        (x₁,y₁)                                             (x₂,y₂)      

This line segment can be represented as \(\frac{}{AB} /\frac{}{BA}\). In other word we can say line segment is

subset

of line, so it contains all the points of line lying between both end point of segment. For shorter length it can simply measure by

ruler

. A bar (-) is always on top of its notation {\(\frac{}{AB}\)}.

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Formula of Line segment is AB =  \(\sqrt{(x_{2}-x_{1})^{2} } +\sqrt{(y_{2}-y_{1})^{2} }\)

Line segment

is a part of line with a definite length. It has two ending points whereas a line has no end points and extended infinitely in both the direction. Line which joins both ending points with possible shortest way is known as

Line segment

        A ______________________ B    

       (x₁,y₁)                                             (x₂,y₂)      

This line segment can be represented as\(\overline{AB}/\overline{BA}\) . In other word we can say line segment is subset of line, so it contains all the points of line lying between both end point of segment. For shorter length it can simply measure by ruler A bar (-) is always on top of its notation {\(\overline{AB}/\overline{BA}\)}.

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The net effect of the sodium-potassium pump is to create a transmembrane electrical potential.

Sodium-potassium pump is a process in which sodium ions (Na+) are transported out of the cell while potassium ions (K+) are transported into the cell. The net effect of this process is that there is a greater concentration of K+ ions inside the cell and a greater concentration of Na+ ions outside the cell.

This creates an electrochemical gradient across the cell membrane. This gradient is what allows cells to carry out a variety of functions such as transmitting signals and carrying out metabolic processes. The electrochemical gradient is also what drives the movement of other molecules across the cell membrane.

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Answer:

Hewo there! I Will Be Very Happy to Help you! :)

⇒ A. Pure substances can be divided into two groups: elements and compounds.

Explanation:

Pure substances can be recognized because they have a definite constant composition, as can be seen in the formula, and distinct chemical properties.

And I took the the quiz and got it  right! :)

I hope this helps you! <3

-Rain-

Answer:

I think firs one is 30

second one is 4

third one is 12

I am not sure about my answers.

The closest frequencies to 450 Hz that an average person can distinguish as being different from 450 Hz would be in the range of 445-455 Hz.

The closest frequencies to 450 Hz that an average person can clearly distinguish as being different in frequency from 450 Hz are typically within a range known as the "Just Noticeable Difference" (JND) or the "Difference Limen." The JND for frequency perception varies from person to person but is generally around 1-5 Hz for a pure tone in the mid-frequency range. This means that an average person can perceive a difference in frequency if it is within the range of approximately 1-5 Hz from the original frequency. Therefore, the closest frequencies to 450 Hz that an average person can clearly distinguish as being different from 450 Hz would be in the range of 445-455 Hz. Frequencies outside this range would be more easily distinguishable as different from the original 450 Hz tone.

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Answer:

41.66 km/h

Explanation:

Calculate the distance of 1st travel :

v = d/t

25 km/h = d/1 h

d = 25 km/h × 1 h

Calculate the distance of 2nd travel :

v = d/t

50 km/h = d/2 h

d = 50 km/h × 2 h

Calculate the velocity of trip :

v = d/t

v = (25 + 100)/(1 + 2)

v = 125 km/3 h

So, my velocity for the trip is 41.66 km/h

Answer:

yes he does

Explanation:

Answer:

3.33 m/s^2

Explanation:

\(a = \frac{v \: - \: u}{t} \)

V = final velocity ( 10m/s^2 )

U = Initial velocity ( 0m/s^2 )

t = Time taken ( 3 s )

\(a = \frac{10 - 0}{3} = 3.3333......\)

approximately = 3.33 m/s^2

This equation relates the speed of the bullet (v) to the masses of the bullet (m) and the wood block (m₂), as well as the height (h) through which the system swings.

To determine the speed of the bullet (v), we can use the principle of conservation of mechanical energy in the system.

Initially, the system has only gravitational potential energy, which is converted into a combination of gravitational potential energy and kinetic energy after the collision. Assuming no energy is lost to other factors like friction or air resistance, we can equate the initial and final energies.

The initial energy is purely potential energy: m₂gh, where m₂ is the mass of the wood block, g is the acceleration due to gravity, and h is the height the system swings through.

The final energy is a combination of potential and kinetic energy: (m + m₂)gh + (1/2)(m + m₂)v², where m is the mass of the bullet and v is its velocity.

Equating the initial and final energies, we can solve for v:

m₂gh = (m + m₂)gh + (1/2)(m + m₂)v².

Simplifying the equation, we find:

v² = 2gh(m₂ - m) / (m + m₂).

Taking the square root of both sides, we get the expression for the speed of the bullet:

v = √[2gh(m₂ - m) / (m + m₂)].

This equation relates the speed of the bullet (v) to the masses of the bullet (m) and the wood block (m₂), as well as the height (h) through which the system swings.

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In the experiments of discovering electricity, I and II, at the beginning of the chapter, objects such as paper bits, feather, and pith ball are attracted to a plastic rod rubbed with wool.

In the experiments of discovering electricity I and II, which are commonly performed to demonstrate static electricity, certain objects can be attracted to a plastic rod when it is rubbed with wool. This phenomenon occurs due to the transfer of electric charge between the plastic rod and the wool.

When the plastic rod is rubbed with wool, electrons are transferred from the wool to the rod, causing the rod to become negatively charged. As a result, objects with a positive charge or neutral objects are attracted to the negatively charged rod. In the mentioned experiments, objects like paper bits, feather, and pith ball are typically used to demonstrate this attraction.

The electrical attraction between the plastic rod and the objects is a result of the redistribution of electric charge and the resulting electrostatic forces.

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Answer:

all above

Explanation:

friction is necessary to live

Answer:

All of above

Explanation:

Answer:

V = 2.5*7.0 / ( 2.5 + 70 )

Answer:

The force applied to a spring equals the product of the spring constant and the displacement.

Explanation:

From Hooke's law, the force required to extend or compress a spring by a distance is proportional to the distance. This means extension is proportional to force.

Mathematically it is stated as;

F= -k*x  where k is the spring constant and x is the displacement of the spring after adjustment.

Hooke's law is an example of elasticity property of a material which is the ability of the object to return to a normal shape after experiencing a distortion also called "restoring force"

Answer:

Option A

Explanation: