a 5mhz ultrasound pulse is used to image tendon tissue. at what depth in the tissue will the intensity be reduced by 25%

Answer:

The skin and accessory structures perform a variety of essential functions, such as protecting the body from invasion by microorganisms, chemicals, and other environmental factors; preventing dehydration; acting as a sensory organ; modulating body temperature and electrolyte balance; and synthesizing vitamin D.

Explanation:

Answer:

There would be tremendous earthquakes and tsunamis, followed by massive volcanism around the impact zone. The ozone layer would be destroyed. The oceans would turn acidic. The Sun would be blotted out, probably for decades.              

Explanation:

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Answer: Well it depends on the size. If the asteroid was the size of a basketball, it would most probably turn to dust by the time it reaches the surface. But, if it was the size of Australia, then most probably everyone would die.

Explanation:

Explanation:

first convert 90m into cm

9000cm × 7cm = x

x= 63000 seconds

A lightyear is a unit of distance, specifically the distance light travels in one year. That distance is about 9,460,730,472,580.8 kilometers, or 5,878,625,373,183.6 miles.

What is distance?

Distance is a measurement of the space between two objects or points. It is a scalar quantity that is commonly measured in feet, yards, meters, or kilometers. Distance can refer to the physical space between two points, such as the distance between two cities, or the length of a road. It can also refer to the space between two objects, such as the distance between two planets. Distance is an important factor in physics, as it is used to calculate the speed and velocity of a moving object. Distance can also be used to calculate the amount of energy required to move an object or the amount of time it takes for a sound wave to travel between two points.

Therefore, That distance is about 9,460,730,472,580.8 kilometers, or 5,878,625,373,183.6 miles.

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option b )2004........

According to Einstein's theory of relativity, mass and energy are interchangeable, The energy equivalent to 1.0 × 10⁻⁴ kg of matter can be calculated using Einstein's famous equation, E = mc², where c is the speed of light (3.0 × 10⁸ m/s).

According to Einstein's theory of relativity, mass and energy are interchangeable, and their relationship is given by the equation E = mc², where E represents energy, m represents mass, and c represents the speed of light. To find the energy equivalent to a given mass, we can simply substitute the mass value into the equation.

Using the given mass of 1.0 × 10⁻⁴ kg and the speed of light c = 3.0 × 10⁸ m/s, we can calculate the energy equivalent:

E = (1.0 × 10⁻⁴ kg)(3.0 × 10⁸ m/s)²

E = 9.0 × 10¹⁶ kg⋅m²/s²

The unit kg⋅m²/s² represents joules (J), which is the unit of energy. Therefore, the energy equivalent to 1.0 × 10⁻⁴ kg of matter is 9.0 × 10¹⁶ joules. This demonstrates the tremendous amount of energy that can be released from a small amount of matter, as predicted by Einstein's equation.

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Colder clouds are less resistant to gravity and therefore can collapse more easily because pressure is greater in heat & lower in cold stuff.

Temperature is a unit used to represent hotness or coolness on any of a number of scales, include Fahrenheit and Celsius. Temperature shows the direction of spontaneous heat transfer, which is from a region of high temperature to a cooler body.

People frequently cite a 2010 study that concluded the highest limit of safety would be a humid temperature of 35 C, or 95 F at 100% humidity or 115 F at 50% humidity.

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Values calculated are as : ω is 3160 rad/sec; R is 175 ohm;  Imax= 0.143 A  and t= 0.000331 sec.

An LRC circuit is also known as a tuned circuit, or an RLC circuit It is an electrical circuit consisting of an inductor (L), capacitor (C), and resistor (R) connected in series or parallel.

= √//( 8 *10^-3 * 12.5 * 10^-60

= 3160 rad/sec.

2. Impedance:

Z= √R² + (XL - Xc)²=

= √R²

= 175 ohm

3. Imax= V/Z

= 25/175

= 0.143 A

I = Imax cosωt

Imax/2= I max cosωt

cosωt= 1/2

t = 0.000331

v= Vcosωt= 12.5 V

VR = IRcosωt= 12.5 V

voltage across the capacito

Vc = IXc Cos(ωt - π/2)

= 3.13 V

voltage across the inductor

VL=  IXL Cos(ωt + π/2)

= -3.13V

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: An L-R-C series circuit is constructed using a 175Ω resistor, a 12.5μF capacitor, and an 8.00-mH inductor, all connected across an ac source having a variable frequency and a voltage amplitude of 25.0 V.

1-At what angular frequency will the impedance be smallest?

2-What is the impedance at this frequency?

3-At the angular frequency in part A, what is the maximum current through the inductor?

4-At the angular frequency in part A, find the potential difference across the ac source, the resistor, the capacitor, and the inductor at the instant that the current is equal to one-half its greatest positive value.

Compared to the pucks in the video, this pair of pucks will rotate One-half as fast.

So, the correct answer is E.

This is because the angular momentum of a system is equal to the product of the moment of inertia and the angular velocity.

Since the moment of inertia of the system has increased by a factor of 2 (due to the pucks being twice as massive), the angular velocity must decrease by a factor of 2 in order to maintain conservation of angular momentum.

Therefore, the pucks will rotate at one-half the rate of the pucks in the video.

Hence, the answer of the question is E.

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Answer:

electric circuit............

which grade

Answer:

heart rate increases during activity

Explanation:

You can work at 70 to 85 percent of your maximum heart rate during vigorous activity.

The total zoom available on a camera is determined by digital zoom added to optical zoom.

Optical zoom refers to the physical movement of the lens elements to magnify the image, while digital zoom is a software-based feature that enlarges the center portion of the image by cropping and interpolating the pixels.

While optical zoom produces higher quality images with no loss of detail, digital zoom can result in a decrease in image quality due to pixelation and loss of resolution.

The total zoom available on a camera is determined by adding the maximum magnification of the optical zoom to the maximum magnification of the digital zoom.

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Answer:

Subduction, Trench, Mantle

Explanation:

Answer: subduction, trench, and mantle

Explanation:

Answer:

1 ms-²

Explanation:

v = u + at

25 = 15 + a× 10

a= 1ms-²

Answer:

Through public awareness

The statement that is true concerning a substance with high specific heat is as follows: the substance cools down slowly after heating. an example substance is aluminum metal (option A)

Specific heat or specific heat capacity refers to the heat capacity per unit mass of a pure substance.

In other words, specific heat is defined as the amount of heat needed to increase the temperature of 1kg of a material by 1K and is expressed in terms of J/kg·K or equivalently J/kg·°C.

The specific heat capacity of a material is a physical property. It is also an example of an extensive property since its value is proportional to size.

Water is an example of a substance that has an extremely high specific heat capacity, which makes it good for temperature regulation.

Therefore, a substance with high specific heat cools down slowly after heating and an example is aluminum metal.

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A comet's dust and plasma tails point direction is: a) generally away from the Sun

The dust and plasma tails of a comet typically point away from the Sun. This occurs due to the interaction between the solar wind (a stream of charged particles emitted by the Sun) and the coma (the cloud of gas and dust surrounding the comet's nucleus).

As the solar wind pushes against the coma, it causes the dust and ionized gas (plasma) to be pushed away from the Sun, forming the characteristic tails that can extend for millions of kilometers.

The direction of the tails is influenced by various factors, including the orientation of the comet's nucleus and the strength and direction of the solar wind.

However, in general, the tails of a comet always extend in the opposite direction of the Sun, forming a tail that points away from the Sun in a roughly straight line.

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Answer:

Yes it can

Explanation:

Answer:

¿Podrías poner la pregunta en inglés por favor?

Explanation:

The reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

Given that the mass of a person is 60.0 kg and the elevator accelerates upwards with an acceleration of 4.90 m/s², we have to determine the reading on the scale.

Let F be the force exerted by the scale on the person. Then, by Newton's second law of motion, the net force acting on the person is Fnet= m * a

where m = 60.0 kg is the mass of the person and a = 4.90 m/s² is the acceleration of the elevator. Hence, the net force acting on the person is given by;

Fnet = 60.0 kg * 4.90 m/s²

Fnet = 294.0 N

Therefore, the scale reading is equal to the force exerted by the scale on the person. Since the elevator is accelerating upwards, the force exerted by the scale on the person is greater than the weight of the person, which is the force of gravity acting on the person.

The force of gravity acting on the person is given by;

Fg = m * g, where g = 9.81 m/s² is the acceleration due to gravity. Hence, the force of gravity acting on the person is given by;

Fg = 60.0 kg * 9.81 m/s²Fg = 588.6 N

Therefore, the scale reading is given by the sum of the force of gravity acting on the person and the net force acting on the person;

F = Fg + Fnet

F = 588.6 N + 294.0 N

F = 882.6 N

Thus, the reading on the scale is 882.6 N when the elevator accelerates upwards with an acceleration of 4.90 m/s².

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The answer is D. distance between trough and crest. Wavelength is the distance between two consecutive points of the same phase on a wave, such as two adjacent crests, troughs, or zero crossings.

Wavelength is the distance between two consecutive points of the same phase on a wave, such as two adjacent crests, troughs, or zero crossings. So the answer is the distance between the trough and crest.

The other options are incorrect. Option A is the length of time the wave has been in motion, which is not the same as wavelength. Option B is the distance between the trough and the trough, which is half of the wavelength. Option C is the distance between the quiet water level and the crest, which is not a physical measurement of the wave.

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A uranium atom's nucleus measures 1.5 x 10^-14 mm in diameter and weighs of 2.2635 x 10^17 kg.

The Earth's crust contains 2.8 parts per million of uranium, an element that is found naturally. It is virtually always present in little amounts. It is almost the same in abundance as tin, somewhat less abundant than cobalt, lead, or molybdenum, and more abundant than gold, silver, or mercury.

Nucleus density is determined by the ratio of mass to volume.

Proton mass equals nucleus mass.

Nucleus volume is equal to (4/3)*pi*r3. and r is the radius

A uranium atom's nucleus has a mass of 4.0*10^-25 kg and a diameter of 1.5*10^-14 m.

first, locate volume.

Radius is calculated as follows: 1.5*10^-14 m/2 = 7.5*10^-15 m radius

vol is equal to (4/3)*pi*(7.5*10^-15)3 = 1.76715*10^-42 of volume.

Locate density using the formula d=m/vol (kg/m³)

d = 4.0*10^-25 kg / 1.76715*10^-42 m^3

d = 2.2635*10^17 (kg/m³)

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Correct Question:

The Nucleus Of A Uranium Atom Has A Diameter Of 1.5*10^-14 M And A Mass Of 4.0*10^-25 Kg.

A gradient wind blowing around the low-pressure center is constantly accelerating because it is constantly changing directions. This is called centripetal acceleration.

Centripetal acceleration is the rate at which a body moves through a circle.

Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude, the speed, and a direction), when a body travels in a circle, its direction is continually changing, which causes a change in velocity, which results in an acceleration.

The circle's center is where the acceleration is pointed radially. The square of the body's speed along the curve divided by the radius (r) of the circle from the moving body's center determines the centripetal acceleration (ac); is v²r.

Units for centripetal acceleration are metres per second squared. The force creating this acceleration, known as the centripetal force, is also pointed in the direction of the circle's center.

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Answer:

C. Core

Explanation:

Answer:

Length of steel = 5.5 m

Increase in length = 0.0012 m

α of steel = 12 x 10-6/K

To find:

Temperature change needed ?

Calculation:

Let the required temperature change be ∆T. (in the photo)

So, temperature change of 18.1 Kelvin is required

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The speeds of the vertically launched sphere and horizontally launched sphere will not necessarily be the same when they hit the floor, even if they are launched from the same height and at the same initial speed.

When a sphere is launched vertically upwards, it will slow down due to the force of gravity acting against it, until it reaches the highest point of its trajectory and momentarily stops. Then, it will accelerate back downwards towards the ground, increasing in speed until it hits the floor. The speed at which it hits the floor will depend on its initial speed, the height it was launched from, and the acceleration due to gravity.

On the other hand, when a sphere is launched horizontally, it will continue to move at a constant speed in the horizontal direction, while also being accelerated downwards due to the force of gravity. The resulting motion is a projectile motion with a parabolic trajectory. The speed at which it hits the floor will depend on its initial horizontal speed, the height it was launched from, and the acceleration due to gravity.

Therefore, the speeds of the vertically and horizontally launched spheres when they hit the floor will depend on a variety of factors and cannot be determined without more information about the specific conditions of the launches.

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To find the wavelength of the wave along the string, we first need to measure the distance between two consecutive points on the wave that are in the same phase.

We can look at the graph provided by the question, whose full cycle of the wave completes in 0.1sec, i.e. demonstrating that this is a complete up and down movement of the point.

As measured in the graph, we see that the distance between two consecutive points is 0.5 cm. Then we calculate the wavelength of the wave using the following formula:

Therefore, the wavelength of the wave corresponds to 0.005m.

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Answer:

See below

Explanation:

Assuming no resistance

DISTANCE =  1/2 a t^2

443 = 1/2 (9.81)t^2      Shows t = 9.5 seconds