In an aneurysm, the cross-sectional area of a vessel expands. With the approximation that blood is non-viscous and incompressible, and that you have a laminar flow, which one of the following is true in the expanded segment, compared to the normal vessel?
a) The velocity is higher.
b) The flow is higher.
c) The density of the blood increases.
d) The velocity is the same.
e) The density of the blood decreases.
f) None of the above.

The velocity of an object includes direction of the motion of an object whereas speed does not include direction. Thus, the correct options for 1, 2, 3, 4, and 5 are B, B, A, A, and B, respectively.

Velocity can be defined as the directional speed of an object in the motion as an indication of the rate of change in the position of an object as observed from a particular frame of reference by the observer and as measured by a particular standard of time.

The velocity is different from that of speed as it is a vector quantity, the velocity of an object includes direction of the motion of an object whereas speed does not include direction.

Track runners cover same distance however, the winner in the race is the one who covers the particular distance in less time than other competitors.

The slowest runner in the graph is the one represented with blue color. This is because, this runner took maximum time to cover the distance.

The distance covered by the train is 300 miles in time period of 6 hours. Therefore, the speed of the train will be the distance covered by the train divided by the total time taken.

Speed of the train = 300 miles/ 6 hours

Speed of the train = 50 miles per hour.

The example of velocity is the one with the unit of length per time. From the given options, 80 miler per hour is an example of velocity as miles is the unit of length and hour is the unit of time.

Therefore, the correct options for 1, 2, 3, 4, and 5 are B, B, A, A, and B, respectively.

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The chi-square test assumes that the variables being analyzed are measured at a nominal or ordinal level of measurement.

In statistics, the level of measurement refers to the nature and properties of the data being collected. There are four levels of measurement: nominal, ordinal, interval, and ratio. Nominal and ordinal levels are considered categorical, while interval and ratio levels are considered numerical. The chi-square test is specifically designed for analyzing categorical data, where the observations can be classified into distinct categories or groups. It is used to determine whether there is a significant association or relationship between two categorical variables.

The test calculates the difference between the observed frequencies and the expected frequencies under the assumption of independence between the variables. It compares the observed and expected frequencies using a chi-square statistic and determines the p-value to assess the statistical significance of the association. Therefore, the chi-square test assumes that the variables being analyzed are measured at a nominal or ordinal level because it deals with categorical data and evaluates the relationship between different categories or groups.

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Answer:

18,436 newtons

Explanation:

hope it helps you

Answer:

A hot air balloon

Answer:

you can tell them it is the amount of "push" on an object then you can explain using a soccer ball being kicked or a cart being pushed

Explanation:

We will have the following:

1. 143 g = 0.143 kg:

2. 110 g = 0.110 kg:

3. 410 g = 0.410 kg:

4. 46 g = 0.046 kg:

From this we can see that the given weights do not correspond to any of the values of column B, since the calculations to obtain the values of column B were done using grams, instead of kg, thus those values do not correspond to the unit of force Newtons.

well thanks for the Information

Explanation:

Torque = Force * Perpendicular distance of the force = 10N * 0.8m = 8Nm.

In diagram A, both torques are acting in a clockwise direction. Hence the net torque is 2N * 1m + 4N * 1m = 6Nm, clockwise.

In diagram B, the torques are acting in opposite directions. For the clockwise one, its torque is 5N * 4m = 20Nm. For the anticlockwise one, its torque is 2N * 10m = 20Nm. Since they are in opposite directions and are equal, they cancel out each other.

Hence net force = 0N and net torque = 0Nm.

Answer:

the stars which are red in color are cool.

Explanation:

The stars which has reddish color are cool in nature while those stars which has white and blue in color are very hot in nature. The stars change its color when they becomes hotter , first the star color reddish when they are cool but with increasing temperature it changes the color from reddish to orange then yellow. After yellow it turns green and finally get blue color when the stars are very very hot.

Explanation:

the question is not clear

Answer:

Thanos went *snap*

Explanation:

Electricity needs a path to follow to get from one destination to another. And the journey is always the same: Power – Electricity always starts from a source, like a battery or an outlet.

"A battery is a device that converts chemical energy contained within its active materials directly into electric energy by means of an electrochemical oxidation-reduction (redox) reaction. This type of reaction involves the transfer of electrons from one material to another via an electric circuit."

"In electronics, a circuit is a complete circular path that electricity flows through. A simple circuit consists of a current source, conductors and a load. The term circuit can be used in a general sense to refer to any fixed path that electricity, data or a signal can travel through."

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Answer: (a) Z-score are 1 and -1.2 for northern and southern regions, respectively.

Explanation: Z-score is how many standard deviations a data is from the population mean or how far a data point is from the mean.

The z-score is calculated by the following:

\(z=\frac{x-\mu}{\sigma}\)

where

x is the data point

μ is population mean

σ is standard deviation

For the northern region birds:

μ = 10, σ = 3, x = 13

\(z=\frac{13-10}{3}\)

z = 1

The z-score for birds living in the northern region is 1, which means it is 1 standard deviation above the mean.

For the southern region:

μ = 16, σ = 2.5, x = 13

\(z=\frac{13-16}{2.5}\)

z = -1.2

The z-score for southern living birds is -1.2, meaning it is 1.2 standard deviations below the mean.

Answer:

Option a

Explanation:

The light that strikes this surface is referred to as the incident ray, and the light reflected is referred to as the reflected ray - as one might have guessed. Respectively, the angle with which the incident ray struck the surface is known as the " incident angle, " while the angle with which the reflected ray reflects off this surface is known as the " angle of reflection. "

_______________________________________________________

By the law of reflection, you would say that the incident angle is equal to the angle of reflection. Thus, the answer is option a.

Hope that helps!

If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

option D is the correct answer.

Half life is the time that it takes for half of the original value of some amount of a radioactive element to decay.

If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is calculated as follows;

1,000 ---------- 0 time

500 ----------- 10.4 hours

125 ------------- 20.8 hours

Thus, from the calculation done above, we can see that If you start with 1,000 grams of erbium-165, the time it  will take to have 125 grams of erbium-165 left in the sample is 20.8 hours.

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At the center of our galaxy lies the supermassive black hole Sagittarius A*, often abbreviated Sgr A*. This giant is about 4 million times the mass of the sun and about 14.6 million miles (23.6 million kilometers) in diameter.

In physics, the Milky Way refers to the galaxy in which our solar system resides. The Milky Way is a barred spiral galaxy, meaning it has a central bar-shaped structure with arms spiraling out from it. The galaxy is estimated to be around 13.6 billion years old and contains billions of stars, as well as gas, dust, and dark matter.

The Milky Way has a diameter of approximately 100,000 light-years and is located about 26,000 light-years from the galactic center. It rotates once every 240 million years, with stars closer to the center moving faster than those on the outer edges. The gravitational force of the Milky Way holds the solar system in its orbit.

The study of the Milky Way is important in astrophysics as it provides insight into the evolution and formation of galaxies.

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Answer:

Making the lumber thick will make it stiff, which seems good. On the other hand, with thicker lumber, differences in expansion on the two faces have more leverage to make the lumber move.

When a roller coaster reaches a velocity of 65.0 m/s prior to the ascent of a hill, the maximum height that can be reached without any propulsion is approximately 213.6 meters.

This assumes that there is no energy loss from friction. The energy conservation principle governs the maximum height reached by a roller coaster. At the base of the hill, the roller coaster has kinetic energy (energy of motion), but no potential energy (energy of height). It has the maximum potential energy and minimum kinetic energy at the highest point of the hill, and it returns to the base of the hill with zero potential energy and maximum kinetic energy. The total energy, which is the sum of potential energy and kinetic energy, is always conserved, implying that the energy at the base of the hill equals the energy at the peak of the hill. According to the principle of conservation of energy:Ei = Efwhere Ei is the initial energy, Ef is the final energy, and E = KE + PE, where KE is kinetic energy, and PE is potential energy.Consider the roller coaster with a velocity of 65.0 m/s at the base of the hill. The initial energy of the roller coaster, Ei = KE + PE, is equal to: Ei = (1/2) mv^2 + 0where m is the mass of the roller coaster and v is its velocity. Ei = (1/2) mv^2The final energy of the roller coaster at the highest point on the hill, Ef, is equal to: Ef = 0 + mghwhere h is the height of the roller coaster at the top of the hill.

Equating Ei and Ef:(1/2) mv^2 = mgh

Solving for h, we get: h = (1/2) v^2/g

where g is the acceleration due to gravity.The maximum height that can be attained by a roller coaster without propulsion is h = (1/2) v^2/g.

Substituting v = 65.0 m/s and g = 9.81 m/s²,

we get: h = (1/2) (65.0 m/s)^2/9.81 m/s² = 213.6 meters.

Therefore, the maximum height that a roller coaster can reach without propulsion is around 213.6 meters, given no friction.

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The work done by the dog is 0.81J.

Work done is a measure of energy expended in moving an object; most commonly calculated by multiplying the force by the distance.

It is said that no work is done if the object does not move.

The work done on an object is the amount of energy transferred to an object through work.

According to this question, a dog lifts a 0.75 kg bone straight up through a distance of 0.11 m. The force applied to break the bone must be calculated first as follows:

Force = mass × acceleration

Force = 0.75kg × 9.8m/s²

Force = 7.35N

Work done = 7.35N × 0.11m = 0.81J

Therefore, 0.81J is the work done by the dog.

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Answer:

The Awnser Is D

Explanation:

Hope This Helps

Explanation:

The current flow through a wire is determined by the relationship between the voltage applied across the wire and its resistance. The resistance of a wire is directly proportional to its length and inversely proportional to the cross-sectional area (radius) of the wire.

If we connect a copper wire of the same initial length to another wire with twice the smaller radius, the cross-sectional area of the wire will change. Since the resistance is inversely proportional to the cross-sectional area, a decrease in the radius will result in an increase in resistance.

According to Ohm's Law (V = I * R), where V is the voltage, I is the current, and R is the resistance, if we keep the voltage constant, an increase in resistance will result in a decrease in current.

Therefore, the correct answer is:

c) The current decreases 4 times.

The point at which a satellite crosses from south of the earth's equator to north of the equator is called the ascending node.

The ascending node is the point where a satellite's orbit intersects the plane of the earth's equator from south to north. At this point, the satellite crosses the equator and begins moving northward. The opposite point, where the satellite crosses from north to south, is called the descending node. These nodes are important in satellite tracking and monitoring, as they allow scientists and engineers to accurately predict the satellite's path and position in orbit.

In orbital mechanics, the ascending node is the location where a satellite or celestial object passes through the equatorial plane going from the southern hemisphere to the northern hemisphere. This point is significant because it helps in determining the satellite's orbital trajectory and is used for various calculations and predictions.

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Answer:

$18

Explanation:

Each of the was qiven $18

All together =24

24 divide it by 4 (because there were 4 people there)

= 6  (6+6+6+6)

= 24

=6+12=18    

.Hence each of them was given $18

Answer:

4(m−12)=24

4m-48=24

4m= 24+48

4m=72

m=18

Explanation:

it correct i did it on my school work and get an A+

Explanation:

According to newtons first law of motion " A body is at a state of rest or uniform motion unless acted upon by a force (external)" which will either

1. change the direction

2. change the acceleration

3. change the velocity(moves or stop the body from moving)

4. change the shape or size

Answer:

A

Explanation:

Answer:

Distance divided by time

Explanation:

Solution:

Mass of liquid water and water vapor in the insulated tank initially = 1.4 kg

Temperature = 200 °C

And 25% of the volume by liquid water is steam.

State 1

\($m=\frac{V}{v}$\)

\($m=m_f+m_g$\)

\($1.4=\frac{0.25V}{v_f}+\frac{0.75V}{v_g}$\)

\($1.4=\frac{0.25V}{1.1565 \times 10^{-3}}+\frac{0.75V}{0.1274}$\)       (taking the value of \($v_g$\) and \($v_g$\) at 200°C  )

\($V=6.304 \times 10^{-3}$\)

Now quality of vapor

\($x=\frac{m_g}{m}$\)

  \($=3.377 \times 10^{-3}$\)

Internal energy at state 1 can be found out by

\($u_1=u_f+xu_{fg}$\)

    \($=850.65+3.377\times10^{-3}\times 1744.65$\)

    = 856.54 kJ/kg

After heating with the resistor for 20 minutes, at state 2, the tank contains saturated water vapor \($v_2=v_g \text { and }\ x=1$\)

Tank is rigid, so volume of tank is constant.

\($v_g=v_2=\frac{V}{m}$\)

\($v_g=\frac{6.304\times 10^{-3}}{1.4}$\)

\($v_g=4.502 \times 10^{-3} \ m^3 /kg$\)

Now interpolate the value to get temperature at state 2 with specific volume value to get final temperature

\($T_2=360+(374.14-360)\left(\frac{0.004502-0.006945}{0.003155-0.006945}\right)$\)

   = 369.11° C

Internal energy at state 2

\($u_2=2154.9 \ kJ/kg$\)

Now power rating of the resistor

\($P=\frac{m(u_2-u_1)}{t}$\)

\($P=\frac{1.4(2154.9-856.54)}{20 \times 60}$\)

  = 1.51 kW

Answer:

Bulb B is the answer

Gas consumption drops by around 25 therms for every 10 degree drop.

To interpret the slope of the line of best fit, we look at the relationship between the two variables involved. In this case, the slope of -2.5 therms per degree indicates that for every 1-degree decrease in temperature, there is a decrease of 2.5 therms of gas used.

Option a correctly represents this interpretation. It states that for each decrease of 10 degrees (which is equivalent to 10 * 2.5 = 25 therms), the amount of gas used decreases by about 25 therms. This aligns with the negative slope, indicating a decrease in gas usage as the temperature decreases.

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Answer: 1.5 × 10^-17

Explanation:

Given the following :

Frequency(f) = 2.2 × 10^16 Hz

Planck's constant(h) = 6.63 × 10^-34

The energy of a photon 'E' is given as the product of frequency and the planck's constant

E = hf

E = (6.63 × 10^-34) × (2.2 × 10^16)

E = 6.63 × 2.2 × 10^(-34 +16)

E = 14.586 × 10^-18

E = 1.4586 × 10^-17

E = 1.5 × 10-17 (2 S. F)

Answer:

C. 1.5 × 10–16 J

Explanation:

It moves at a constant linear speed around it. Yet, the linear velocity at any point on the blades is constantly varying and accelerating.

Acceleration typically indicates a change in speed, but not necessarily. An item that follows a circular course while maintaining a constant speed is still moving forward because the direction of its motion is shifting.

Most likely, you picture something racing up when you think about acceleration. But a moving thing accelerates as it slows down. A change in speed is what acceleration is, so keep that in mind. The speed of a car that is slowing down decreases.

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