An important diagnostic tool for heart disease is the pressure difference between blood pressure in the heart and in the aorta leading away from the heart. Since blood within the heart is essentially stationary, this pressure difference can be inferred from a measurement of the speed of blood flow in the aorta. Take the speed of sound in stationary blood to be c.

a. Sound sent by a transmitter placed directly inline with the aorta will be reflected back to a receiver and show a frequency shift with each heartbeat. If the maximum speed of blood in the aorta is v, what frequency will the receiver detect? Note that you cannot simply use the textbook Doppler Shift formula because the detector is the same device as the source, receiving sound after reflection.
b. Show that in the limit of low blood velocity (v <
f= 2fo v/c

Answer:

Heat is flowing into the metal.

Explanation:

From the question given above, the following data were obtained:

Mass (M) of iron = 150 g

Initial temperature (T₁) = 25.0°C

Final temperature (T₂) = 73.3°C

Direction of heat flow =?

Next, we shall determine the change in the temperature of iron. This can be obtained as follow:

Initial temperature (T₁) = 25.0 °C

Final temperature (T₂) = 73.3 °C

Change in temperature (ΔT) =?

ΔT = T₂ – T₁

ΔT = 73.3 – 25

ΔT = 48.3 °C

Next, we shall determine the heat transfered. This can be obtained as follow:

Mass (M) of iron = 150 g

Change in temperature (ΔT) = 48.3 °C

Specific heat capacity (C) of iron = 0.450 J/gºC

Heat (Q) transfered =?

Q = MCΔT

Q = 150 × 0.450 × 48.3

Q = 3260.25 J

Since the heat transferred is positive, it means the iron metal is absorbing the heat. Thus, heat is flowing into the metal.

For the following are four electrical components:

a. For components A and B, both of which obey Ohm's law, the current-voltage characteristics would be a straight line passing through the origin. The slope of the line for component B would be steeper than that of component A, indicating higher resistance.

b. The shape of the characteristic for component C, the filament lamp, can be explained by its construction. A filament lamp consists of a filament made of a resistive material, typically tungsten, which heats up and emits light when an electric current passes through it.

c. The component chosen for D, which does not obey Ohm's law, could be a diode. A diode is a two-terminal electronic component that allows the current to flow in only one direction.

For the following are four electrical components:

a. Sketches of current-voltage characteristics:

For components A and B, both of which obey Ohm's law, the current-voltage characteristics would be a straight line passing through the origin. The slope of the line for component B would be steeper than that of component A, indicating higher resistance.

  Current (I)

     ^

     |          B

     |         /

     |        /

     |       /

     |      /

     |     /

     |    /

     |   /

     |  /

     | /

     |/

     +------------------> Voltage (V)

     Current (I)

     ^

     |          A

     |         /

     |        /

     |       /

     |      /

     |     /

     |    /

     |   /

     |  /

     | /

     |/

     +------------------> Voltage (V)

For component C, a filament lamp, the current-voltage characteristic would be a curve that is not linear. It would exhibit a non-linear increase in current with increasing voltage. At lower voltages, the lamp would have low resistance, but as the voltage increases, the resistance of the filament also increases due to the phenomenon of thermal self-regulation. This leads to a slower increase in current at higher voltages.

For component D, a component that does not obey Ohm's law, the current-voltage characteristic could be any non-linear curve depending on the specific component chosen. Examples of components that do not obey Ohm's law include diodes and transistors.

b. The shape of the characteristic for component C, the filament lamp, can be explained by its construction. A filament lamp consists of a filament made of a resistive material, typically tungsten, which heats up and emits light when an electric current passes through it. As the voltage across the filament increases, the temperature of the filament increases as well, causing its resistance to increase. This increase in resistance results in a slower increase in current with increasing voltage, leading to the characteristic non-linear curve observed.

c. The component chosen for D, which does not obey Ohm's law, could be a diode. A diode is a two-terminal electronic component that allows the current to flow in only one direction. It exhibits a non-linear current-voltage characteristic where it conducts current only when the voltage is above a certain threshold, known as the forward voltage. Below this threshold, the diode has a high resistance and blocks current flow in the reverse direction. The characteristic curve of a diode would show negligible current flow until the forward voltage is reached, after which it exhibits a rapid increase in current with a relatively constant voltage.

For more such questions on electrical components, click on:

https://brainly.com/question/28630529

#SPJ8

Answer:

a. {v_{x}} = 10.8 m/s, {v_{y}} = -5.01 m/s

Explanation:

The initial velocity components are

Horizontal 11.9cos24.9 = 10.8 m/s

Vertical     11.9sin24.9 = 5.01 m/s    (where up is assumed positive)

In the absence of air resistance, the horizontal velocity will remain unchanged and, assuming the ground is horizontal, the vertical velocity will have completely reversed directions.

Using kinematics we can find that the take-off distance is 6163 ft

Given parameters

To find

The measurement system allows not to have problems when working in different units, in this case we reduce the speed units

       v = 140 mile / h (5280 ft / mile) (1h / 3600 s) = 205.34 ft / s

The kinematics allows to find the relationships between the position, the speed and the acceleration of a body, in this case the movement is in one dimension.

          v = v₀ + a t

where v and v₀ are the final and initial velocity, respectively, at acceleration and t the time

          a = \(\frac{v-v_o}{t}\)

          a = \(\frac{205.34 - 0}{60.0}\)

          a = 3.42 ft / s²

Let's use the expression

          v² = v₀² + 2 a x

Where v and v₀ are the final and initial velocity, respectively, at acceleration and x the distance traveled

              x = \(\frac{v^2 - v_o^2 }{2 \ a}\)

              x = \(\frac{205.33^2 - 0}{2 \ 3.42}\)

              x = 6163.8 ft

Let's reduce to miles

             x = 6163.8 ft (1 mile / 5280 ft)

             x = 1.17 mile

In conclusion using kinematics we can find that the take-off distance is 6163 ft

Learn more about kinematics here:

The time when the particle is at rest is at 1.63 s or 3.36 s.

The velocity is positive at when the time of motion is at \(0<t<1.63 \ s \ \ or \ \ t> 3.36 \ s\).

The total distance traveled in the first 10 seconds is 847 m.

The time when the particle is at rest is calculated as follows;

s(t) = 2t³ - 15t² + 33t + 17

\(v = \frac{ds}{dt} = 6t^2 -30t + 33\\\\at \ rest, \ v = 0\\\\6t^2 - 30t + 33 = 0\\\\6(t- \frac{5}{2} )^2- \frac{9}{2} = 0\\\\t = 1.63\ s \ \ or \ 3.36 \ s\)

The velocity is positive at when the time of motion is as follows;

\(0<t<1.63 \ s \ \ or \ \ t> 3.36 \ s\).

The total distance traveled in the first 10 seconds is calculated as follows;

\(2(10)^3 - 15(10)^2 + 33(10) + 17 = 847 \ m\)

Learn more about motion of particles here: https://brainly.com/question/11066673

Answer:

Temperate marine climates are humid and have mild winters. There are three kinds of temperate marine climates: marine west coast, humid subtropical, and mediterranean. Marine west coast climates are the coolest temperate marine climates. Humid ocean air brings cool, rainy summers and mild, rainy winters.

The speed at aphelion is mathematically given as

v2 = 21.43 km/s

Question Parameter(s):

At perihelion a planet in another solar system is 175 x 106 km from its sun at traveling at 40 km/s.

At aphelion it is 250 x 106 km distant.

Generally, the equation for the angular momentum conservation is mathematically given as

I1*w1 = I2*w2

Therefore

(0.5*m*R1^2)*v1/R1 = (0.5*m*R2^2)*v2/R2

Where

v1*R1 = v2*R2

v2 = v1*(R1/R2) = (30*10^3)*(2.50*10^11)/(3.50*10^11)

v2 = 2.1428*10^4 m/s

v2 = 21.43 km/s

In conclusion, speed is

v2 = 21.43 km/s

Read more about Speed

https://brainly.com/question/4931057

#SPJ2

The total equivalent resistance of the circuit which consists of 4 resistors ( 1202, 180, 320 and 3802 ) connected in series is 50.1 KΩ

Resistance of resistor,

Total equivalent resistance, R = R1 + R2 + R3 + R4

R = 12000 + 18 + 32 + 38000

R = 50.1 KΩ

Equivalent resistance is a another way of indicating total resistance. The equivalent resistance will be of a single resistor that replaces the total network without altering any effect on the system.

Therefore, the total equivalent resistance of a series circuit consists of 4 resistors connected in series: 1202, 180, 320, and a 3802 is 50.1 KΩ

To know more about total equivalent resistance

https://brainly.com/question/28258048

#SPJ1

Answer:

Increasing the resistance

Explanation:

Answer: A

Explanation:

increasing the resistance

Answer: Endothermic  Reaction

Explanation: Photosynthesis requires energy right, making it an endothermic reaction. Light, generally sunlight, is the source of this energy. The process converts the sun's electromagnetic energy into chemical energy, which is then stored in chemical bonds in the plant. Which then leads to Photosynthesis occuring.

The radius of the Sun is approximately 654497.9 kilometers.

A subtended angle in geometry is an angle created by a common point (in this case, the Earth) that crosses two points of a nearby circular arc (the Sun in this case). Below is a visual illustration of the subtended angle.

The law of cosine can be used to calculate the sun's radius, which is 654497.950 kilometers in kilometers.

The Sun's radius is nearly 109 times bigger than the Earth's. The Earth's radius is 6378 kilometers. Or to put it another way, both dimensions are 1: 109 ratios.

To learn more about  radius of sun please visit -
https://brainly.com/question/12452173
#SPJ1

The first step towards a bill becoming a law is for the bill to be introduced in Congress.

Next, the bill goes to a committee to be marked up, dropped, or sent to the floor.

After that, the bill is debated on the floor and can pass with a majority vote of the house that sponsored it.

In the next stage, the bill must go to the other chamber, to repeat the process.

After the bill is resolved in the conference committee, it goes to the president.

The Congress is sometimes referred to as Senate and it can be defined as a deliberative assembly or council of elected citizens found in the upper chamber or house of a bicameral legislature.

This ultimately implies that, Congress is a federal legislative arm of government of the United States of America, which is saddled with the responsibility of enacting and passing federal laws and bills for the citizens, with the steps enumerated above.

Generally speaking, the first step of making bill to become a law is introducing it to the Congress while the last step is the resolution of a bill if it is voted in favor by at least 44 senators, and then it finally goes to the president for assent through his or her signature.

Read more on a bill here: https://brainly.com/question/18574075

#SPJ1

Complete Question:

Use the drop down menus to complete the sentences.

The first step in a bill becoming a law is for the bill to be _____.

Next the bill goes to _____ to be marked up, dropped or sent to the floor.

After that, the bill is debated on the floor and can pass on a majority vote of ____.

In the next stage, the bill must go to the ____ to repeat the process.

After the bill is resolved in the ____, it goes to the president.

The electric field at the y-axis position is -10.0 N/C and is oriented towards the negative charge and electric potential at the point on the y-axis is -0.5 V..

To calculate the electric potential and electric field at the point on the y-axis, use equations for electric potential and electric field due to an electric dipole:

Electric potential V = kq/(r_+) - kq/(r_-)

Electric field E = kq/(r_+)² - kq/(r_-)²

where k = Coulomb constant,

q = charge of each point charge,

r_+ = distance from the positive charge to the point on the y-axis, and

r_- = distance from the negative charge to the same point on the y-axis.

Using the given values:

r_+ = √((0.01 m)² + (0.1 m)²) = 0.1005 m

r_- = √((0.008 m)² + (0.1 m)²) = 0.1002 m

q = 3.0 μC

Electric potential:

V = (9.0 x 10⁹ N·m²/C²)(3.0 x 10⁻⁶ C)/(0.1005 m) - (9.0 x 10⁹ N·m²/C²)(3.0 x 10⁻⁶ C)/(0.1002 m)

V = 215.6 V - 216.1 V

V = -0.5 V

The electric potential at the point on the y-axis is -0.5 V.

Electric field:

E = (9.0 x 10⁹ N·m²/C²)(3.0 x 10⁻⁶ C)/(0.1005 m)² - (9.0 x 10⁹ N·m²/C²)(3.0 x 10⁶ C)/(0.1002 m)²

E = 2705.6 N/C - 2715.6 N/C

E = -10.0 N/C

The electric field at the point on the y-axis is -10.0 N/C, directed towards the negative charge.

Find out more on electric dipole here: https://brainly.com/question/14553213

#SPJ1

Answer:

Workdone = 25500Nm

Explanation:

Given the following data

Force = 425N

Distance = 60m

To find the workdone

Workdone = force *distance

Substituting into the equation, we have

Workdone = 425*60

Workdone = 25500Nm

Answer:

towards the west

One can conclude that the magnetic field must have a component towards the east. The correct option is c.

A magnetic field is a vector field that describes the magnetic influence on moving charges, currents, and magnetic materials.

A moving charge in a magnetic field is subjected to a force that is perpendicular to both its own velocity and the magnetic field.

Every magnet possesses a north as well as a south pole. The opposite poles attract each other, whereas the same poles repel each other.

When you rub a piece of iron against a magnet, the atoms' north-seeking poles line up in the same direction.

Moving north, a proton enters a magnetic field. The proton curves downward as a result of this field. We can conclude that the magnetic field must have an eastward component.

Thus, the correct option is c.

For more details regarding magnetic field, visit:

https://brainly.com/question/23096032

#SPJ2

Answer:

The angle between vectors A and B is 116.6°.

Explanation:

Geometric Addition of Vectors

The geometric construction of the situation stated in the question is shown in the image below.

The angle between vectors A and B is the sum of 90° and θ.

Angle θ can be found by working on the right triangle of side lengths 8 and 4, and angle θ.

We use the tangent ratio:

\(\displaystyle \tan\theta=\frac{\text{opposite leg}}{\text{adjacent leg}}\)

The opposite leg to θ is 4 and the adjacent leg is 8, thus:

\(\displaystyle \tan\theta=\frac{4}{8}=\frac{1}{2}\)

Calculating the angle:

\(\displaystyle \theta=\arctan\left(\frac{1}{2}\right)\)

\(\theta\approx 26.6^\circ\)

Thus the required angle is 90° + 26.6° = 116.6°

The angle between vectors A and B is 116.6°.

As thermal energy is added to a sample of water, the potential energy of its molecules increases, and then the kinetic energy of its molecules increases.

The sections of the heating curve illustrate this process  is B followed by D

Therefore option A is correct.

Thermal energy (also called heat energy) is described as being produced when a rise in temperature causes atoms and molecules to move faster and collide with each other.

some factors of thermal energy include:

Learn more about thermal energy at: https://brainly.com/question/934320

#SPJ1

Answer:

The refractive index of the second medium is approximately 1.24.

Explanation:

We can use Snell's Law to solve this problem, which relates the angle of incidence to the angle of refraction and the refractive indices of the two media:

n1 sin(theta1) = n2 sin(theta2)

where n1 and theta1 are the refractive index and angle of incidence in the first medium, and n2 and theta2 are the refractive index and angle of refraction in the second medium.

In this case, we know that the angle of incidence is 30 degrees, the angle of refraction is 37 degrees, and the refractive index of the first medium (air) is approximately 1.00.

1.00 x sin(30) = n x sin(37)

Simplifying this equation, we get:

n = (1.00 x sin(30)) / sin(37)

n ≈ 1.24

Therefore, the refractive index of the second medium is approximately 1.24.

To learn more about Refractive index, refer to the links:

https://brainly.com/question/26528081

The traffic cop needs 23.3 seconds to pass the automobile.

When your velocity (not speed) changes, you are accelerating. A automobile moving at a steady 100 km/h in a straight line has no acceleration. Average acceleration is equal to (change in velocity) / (duration). The car's acceleration is zero because its change in velocity is also zero.

\(d1 = v1*t1 = 35.0 m/s * 1 s = 35.0 m\)

\(d = d1 = 35.0 m\)

\(d2 = v2*t + (1/2)at^2\)

\(d2 = (1/2)at^2\)

\(v2*t + (1/2)at^2 = (1/2)at^2\)

\(v2*t = (1/2)at^2\)

Solving for t, we get:

\(t = (2v2/a) = (235.0 m/s)/3.0 m/s^2 = 23.3 s\) (rounded to 2 decimal places)

To know more about velocity  visit:-

https://brainly.com/question/17127206

#SPJ1

Q1: A: The force applied would be the same, but the distance would be shorter.

Q2: D: mechanical advantage

Q3: A: Both levers place the fulcrum in between the applied force and the object being lifted.

Q4: C: The man is farther from the fulcrum than the rock is.

Q5: 96.1%

Q6: the friction of the individual pulleys

Q7: 10 kg moving at 5 m/s

Q8: The first rider has more mass.

Q9: mass and speed

Q10: The kinetic energy of the 15 balls will be greater than the kinetic energy of one ball.

Q11: from the electric fields of charged subatomic particles

Answer:

3*10^8 ÷ 475*10^-9

= 6.3 x 10^14

Answer:

S = Vy t + 1/2 g t^2 = 1/2 g t^2    vertical speed with zero initial speed

t = (2 S / g)^1/2      with g = 32 ft/sec^2

t = (900 / 32)^1/2 = 5.30 sec    time to reach ground

V = a t = 32 ft/s^2 * 5.30 s = 170 ft/sec

170 ft/sec / (88 ft/sec / 60 mph) = 116 mph           since 88 ft/sec = 60 mph

Pressure on the bottom when water is added to fill the pipe to its top is 180kPA.

In the first scenario, the atmospheric pressure is:

In the second scenario, h = 8m + 1 m. Therefore, the pressure at the bottom of the barrel is:

What is hydrostatic pressure meaning?

Hydrostatic pressure refers to the pressure that any fluid in a confined space exerts. If the fluid is in a container, there will be some pressure on the wall of that container.

What is hydrostatic pressure used for?

Hydrostatic pressure is one reason (along with the lack of oxygen) why it's not safe for humans to travel unprotected in space. You rely on hydrostatic pressure to keep your lungs at the right inflation and to keep the water in your body from vaporizing.

How is hydrostatic pressure calculated?

The pressure in a liquid at a given depth is called hydrostatic pressure. This can be calculated using the hydrostatic equation:

P = rho * g * d, where P is the pressure, rho is the density of the liquid, g is gravity (9.8 m/s^2) and d is the depth (or height) of the liquid.

Thus, the pressure on the bottom when water is added to fill the pipe to its top is 180kPa.

To know more about hydrostatic pressure:

https://brainly.com/question/12261966

#SPJ1

Answer: B

Explanation:

Answers A and C are examples of physical weathering while B is chemical weathering when water and lime mix it creates a reaction

Potential energy is stored energy because it has the potential to do something which laters turns into kinetic energy which is the moving energy.

Weight is compared with the gravitational force exerted on each of them by the Earth.

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

The gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

When mass increases and distance reduces, gravity rises. Gravity also lowers when the distance between two points grows and the mass decreases.

The gravitational force is balanced by weight;

\(\rm F = W \\\\ G\frac{mM}{r^2} =mg\)

Hence, weight is compared with the gravitational force exerted on each of them by the Earth.

To learn more about Newton's law of gravitation, refer to the link.

https://brainly.com/question/9699135.

#SPJ1

Answer:

B = 1.37 mT

Explanation:

Given that,

The magnitude of the electric field, E = 480 N/C

The speed of the proton, \(v=3.50 \times 10^5\ m/s\)

We need to find the magnitude of the magnetic field. In a velocity selector, the electric field is balanced by the magnetic field. So,

\(qE=qvB\)

Where

B is the magnetic field

\(B=\dfrac{E}{v}\\\\B=\dfrac{480}{3.5\times 10^5}\\\\B=1.37\times 10^{-3}\ T\\\\or\\\\B =1.37\ mT\)

So, the magnetic field is equal to 1.37 mT.