it is estimated that the field at the center of the heart is 90 pt . what current must circulate around a 12- cm -diameter loop, about the size of a human heart, to produce this field? express your answer with the appropriate units.

Field strength refers to the magnitude of the gravitational field strength or acceleration due to gravity. It is measured in newtons per kilogram (N/kg) and can be denoted by the symbol ‘g.' Field strength plays a vital role in calculating the weight of an object.

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The field strength experienced by the object is 290.91 m/s².

The field strength an object experiences is determined by the gravitational force acting on it. The weight of an object is given by the equation w = mg, where w is the weight, m is the mass of the object, and g is the acceleration due to gravity.

Given that the weight of the object is 0.96 N, and the mass of the object is 3.3 g (or 0.0033 kg), we can use the equation w = mg to find the field strength (g). Rearranging the equation, we have g = w/m = 0.96 N / 0.0033 kg = 290.91 m/s².

So, the field strength experienced by the object is 290.91 m/s².

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Answer:

Speed describes only how fast an object is moving, whereas velocity gives both the speed and direction of the object’s motion being a vector quantity. The standard unit to measure velocity is meter per second (m/s or ms-1). For example, “10 meters per second” is scalar and “10 meters per second West” is vector. Acceleration

A convex lens forms an image by refracting light rays that pass through it. When parallel rays of light pass through a convex lens, they converge or come together at a point called the focal point.

1. The distance between the lens and the focal point is called the focal length. The image formed by a convex lens can be either real or virtual, depending on where the object is placed in relation to the focal point.
2. A concave lens, on the other hand, forms an image by diverging or spreading out light rays that pass through it. When parallel rays of light pass through a concave lens, they diverge or spread apart. The image formed by a concave lens is always virtual and smaller than the object.
3. A concave mirror forms an image by reflecting light rays that strike it. When parallel rays of light strike a concave mirror, they converge at a point called the focal point. The distance between the mirror and the focal point is called the focal length. The image formed by a concave mirror can be either real or virtual, depending on where the object is placed in relation to the focal point.
4. A convex mirror forms an image by reflecting light rays that strike it. When parallel rays of light strike a convex mirror, they diverge or spread apart. The image formed by a convex mirror is always virtual and smaller than the object.
5. A concave mirror and a convex lens are similar in that they both converge light rays. However, a concave mirror forms images through reflection, while a convex lens forms images through refraction. Additionally, a concave mirror can form both real and virtual images, while a convex lens can only form real images.

A convex lens converges light beams that are travelling parallel to its principal axis (the incident rays are pointed in the direction of the principal axis). A convex lens is also referred to as a converging lens because all of the light rays it bends eventually come together to form a picture at a single location. When an object is positioned in front of the focal point of a converging lens, a virtual image is created.

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The focal length of the objective lens is approximately -11856.5 cm, based on the given information.

To determine the focal length of the objective lens, we can use the formula for the total magnification of a compound microscope, given by:

Magnification = -(focal length of the objective lens / focal length of the eyepiece)

Given that the magnification is -4525 and the focal length of the eyepiece is 2.62 cm, we can substitute these values into the formula to solve for the focal length of the objective lens.

-4525 = -(focal length of the objective lens / 2.62)

By cross-multiplying and solving for the focal length of the objective lens, we get:

focal length of the objective lens = (-4525 * 2.62) cm

Finally, to find the numerical value, we calculate:

focal length of the objective lens ≈ -11856.5 cm

Therefore, the focal length of the objective lens is approximately -11856.5 cm.

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Answer:

quantitative

Explanation: quantitative research is better for scientist.

Answer:

A cannon ball of mass 4.0 kg is fired from a stationary 96 kg cannon at 120 m/s. Calculate the velocity of the cannon immediately after firing.

total momentum of cannon and cannon ball before = 0 kg m/s - because neither object is moving

total momentum of cannon and cannon ball after collision = 0 kg m/s - because momentum is conserved

Momentum of cannon ball after firing = 4.0 × 120 = 480 kg m/s.

Momentum of cannon after firing = -480 kg m/s (because it recoils in the opposite direction and 480 - 480 = 0 kg m/s, the total momentum after collision).

Rearrange p = m v to find v:

v = p/m

v = 480 divided by 96

v = 5.0 m/s

Note that the forward velocity of the cannon ball was given a positive value. The negative value for the cannon's velocity shows that it moved in the opposite direction.

Answer:

The Tesla moves approx. 25 meters from rest before reaching 60 mi/hr

Explanation:

Given:

Initial velocity = 0 m/s

Final velocity = 26.8 m/s

Time = 1.9 seconds

Acceleration = change in velocity/time

\(a = \frac{26.8}{1.9}\)

The equation to find displacement (Δx) with given starting and final velocity, time, and acceleration is:

\(x = x_{0} + v_{0}t + \frac{1}{2} at^{2}\)

Starting position and initial velocity both equal 0, so

\(x = \frac{1}{2} at^{2}\)

\(x=\frac{1}{2} (\frac{26.8}{1.9})(1.9)^{2}\)

x = 25.46m

Rounded to the nearest whole number, x = 25m

Answer:

a = 0.55 m / s²

Explanation:

The centripetal acceleration is given by the relation

         a = v² / r

angular and linear velocities are related

         v = w r

we substitute

          a = w² r

In the exercise they indicate the angular velocity w = 1 rev/min, let's reduce to the SI system

          w = 1 rev / min (2pi rad / 1rev) (1min / 60s) = 0.105 rad/ s

let's calculate

          a = 0.105² 50.0

          a = 0.55 m / s²

Answer:

mass 3.67 kg, density 600 kg/m3) is fitted

with lead (density 1.14 * 10^4 kg/m3) so that it floats in water with

0.900 of its volume submerged. Find the lead mass if the lead is fitted

to the block’s (a) top and (b) bottom.

The value of the acceleration is 0.76 m/s² and the total time taken by the vehicle is 39 seconds.

The acceleration of the vehicle before coming to rest is calculated as follows;

v² = u² + 2as

where;

the car came to rest with constant velocity attained after 12 seconds.

the initial velocity of the car before 12 seconds is zero.

v² = 0 + 2as

a = v²/2s

a = (10²)/(2 x 66)

a = 0.76 m/s²

d = ut + ¹/₂at²

where;

580 = 0 + ¹/₂(0.76)t²

580 = 0.38t²

t² = 580/0.38

t² = 1,526.3

t = √1,526.3

t = 39 seconds

Thus, the value of the acceleration is 0.76 m/s² and the total time taken by the vehicle is 39 seconds.

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The equation for the displacement of a spring-mass system is given by x = A cos(ωt + φ), where A is the amplitude, ω is the angular frequency, t is time, and φ is the phase angle. We know that the angular frequency is π rad/s and that the mass is at a displacement of 4 cm at 1 second.

At t = 1 second, we have x = 4 cm and t = 1 second. Plugging these values into the equation, we get:

4 cm = A cos(π + φ)

We also know that we are starting to measure time at maximum displacement, which means that at t = 0, x = A. This means that cos(φ) = 1,

which simplifies our equation to:

4 cm = A cos(π)

cos(π) = -1, so we have:

4 cm = -A

Solving for A, we get:

A = -4 cm

However, we know that the amplitude must be a positive value, so we take the absolute value of A:

|A| = 4 cm

Therefore, the magnitude of the amplitude of the spring-mass system is 4 cm.

The answer is c. 4 cm.

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Explanation:

mass = newton ÷ g

m = 1025 ÷ 10

mass= 102.5kg

Answer:

C. Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, sound is not created where no air is present.

Explanation:

The reason the bell is seen to vibrate but not heard is that unlike light, which does not require a medium to pass through, sound waves require an air-filled space in order to vibrate. Option C is correct.

A sound wave is produced when a medium begins to vibrate. When an entity vibrates, a pressure wave is formed, which causes sound.

Light does not need a medium to travel through, but since sound waves must have a medium to vibrate, the sound is not created where no air is present best describes why the bell is seen vibrating but not heard.

The complete question is attached.

Hence option C is correct.

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The force of sliding is the force required to keep an object moving at a constant velocity while it is sliding on a surface.

When an object is sliding on a surface, it experiences a force of friction that acts opposite to its direction of motion. This force of friction is what keeps the object moving at a constant velocity, rather than accelerating or decelerating.

The magnitude of the force of friction depends on the properties of the two surfaces in contact, such as their roughness and the type of material they are made of, as well as the normal force, which is the force exerted perpendicular to the surface. If the object is moving at a constant velocity, the force of friction is equal in magnitude to the force applied to the object, but opposite in direction.

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The rate of energy consumed by the motor in the crane is 10 kW, which corresponds to option C. 10.0 kW.

First, we need to calculate the work done by the crane to lift the object to the top of the platform. Work = force x distance, so work = 2000 N x 150 m = 300,000 J.

Next, we can calculate the power (rate of energy consumption) using the formula Power = Work / Time. Power = 300,000 J / 30 s = 10,000 W = 10.0 kW.

Therefore, the answer is C. 10.0 kW.
To calculate the rate of energy consumed by the motor in the crane, we'll first find the work done and then divide it by the time taken.

Work done (W) = Force (F) x Distance (d)
W = 2000 N x 150 m
W = 300,000 J (joules)

Now, we'll find the power (P) by dividing the work done by the time taken (t).

Power (P) = Work done (W) / Time (t)
P = 300,000 J / 30 s
P = 10,000 W

Since 1 kW = 1000 W, we can convert the power to kilowatts:
P = 10,000 W / 1000
P = 10 kW

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The depiction of changing chemical compounds that best describes the flow of nitrogen from the atmosphere, through the nitrogen cycle, and back into the atmosphere is N2 → NH4+ → NO3- → N2

Ammonification: The formation of ammonia or its compounds from nitrogenous compounds, especially as a result of bacterial decomposition. It is given by this equation: N2 → NH4+

Nitrification: The biological oxidation of ammonia with oxygen into nitrite followed by the oxidation of these nitrites into nitrates. It is given by this equation: NH4+ → NO3-

De-nitrification: A microbially facilitated process of nitrate reduction that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products.

NO3- → N2

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An airplane travels at 165 km/hr for 3hr in a direction of 174 degrees from the local airport in sugar land . To determine how far east of the airport the plane is, we can break down the velocity of the plane. At the end of the 3-hour travel time, the plane is approximately 157.59 km west of the airport in Sugar Land.

To determine how far east of the airport the plane is, we can break down the velocity of the plane into its eastward and northward components using trigonometry.

Given:

Speed of the plane = 165 km/hr

Time of travel = 3 hours

Direction from the airport = 174 degrees

First, we need to find the eastward component of the velocity. This can be calculated using the formula:

Eastward component = Velocity * cos(angle)

Eastward component = 165 km/hr * cos(174 degrees)

Next, we need to find the northward component of the velocity. This can be calculated using the formula:

Northward component = Velocity * sin(angle)

Northward component = 165 km/hr * sin(174 degrees)

Now, we can calculate the distance east of the airport using the formula:

Distance east = Eastward component * Time of travel

Distance east = (165 km/hr * cos(174 degrees)) * 3 hours

Using a scientific calculator, we find:

Distance east ≈ -157.59 km

The negative sign indicates that the plane is west of the airport, which means it is 157.59 km west of the airport.

It's important to note that the direction of 174 degrees is measured clockwise from the north, where east is 90 degrees. Therefore, an angle of 174 degrees corresponds to a direction west of north.

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Approximately 14.58 Kg of water is used to cool the 250 Kg cast iron car engine.

To find the mass of water used to cool a 250 Kg cast iron car engine, we must consider the heat given off by the engine and water as they cool to air temperature.

Given that the engine's initial temperature is 35°C, and the air temperature is 10°C, the heat given off is 4.4 x 10^6 J.

First, we will calculate the heat given off by the engine alone:

Q_engine = m_engine * c_engine * ΔT_engine

where:

Q_engine = heat given off by the engine

m_engine = mass of the engine (250 Kg)

c_engine = specific heat capacity of cast iron (approximately 460 J/Kg°C)

ΔT_engine = change in temperature of the engine (35°C - 10°C = 25°C)

Q_engine = 250 Kg * 460 J/Kg°C * 25°C

Q_engine = 2,875,000 J

Next, we will find the heat given off by the water (Q_water) by subtracting the heat given off by the engine from the total heat given off:

Q_water = Q_total - Q_engine

Q_water = 4.4 x 10^6 J - 2,875,000 J

Q_water = 1,525,000 J

Now, we will find the mass of water (m_water) using the equation:

Q_water = m_water * c_water * ΔT_water
where:

c_water = specific heat capacity of water (4,186 J/Kg°C)

ΔT_water = change in temperature of the water (25°C)

1,525,000 J = m_water * 4,186 J/Kg°C * 25°C

m_water = 1,525,000 J / (4,186 J/Kg°C * 25°C)

m_water ≈ 14.58 Kg

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Answer:

show vector 2A and maybe i can help

Explanation:

Increase at the same rate as the growth in the money supply.

One of the schools of Western economic thinking that evolved in the 16th and 17th century in monetary economics is the quantity theory of money. According to the QTM, the overall level of prices for goods and services is inversely correlated with the money supply.

Keynesian economists contested the idea, but Milton Friedman and the monetarist school of thought updated and revitalised it. The direct correlation between the money supply and price level does not hold, according to the theory's detractors, since money velocity is unstable and prices are sticky in the short term. According to conventional macroeconomic theory, the CPI-based measure of inflation is unaffected by changes in the money supply.

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Bohr explains that the atom consists of a nucleus which contains protons and neutrons in it and electrons revolve around the nucleus in different orbits. The nucleus is positively charged and electrons revolving around are negatively charges.

According to Bohr's model of atom, there are different number of shells in which electrons revolve. The shells are named as K, L, M, N... According to Bohr's model, K shell which is lowest shell can only have two electrons in its orbit. Therefore, Bohr's model shown in 1. is correct as it has only two electrons in K shell.

Assuming each concrete span is half the length of the bridge, so 195 m

ΔL = αLΔT,

where,

ΔL: change in length

α: coeff. of thermal expansion

L: current original length

ΔT: change in temperature

We need to look at each span individually.

Let's fill in the variables we know:

L = 195 m

α = 1.2*10^-5 /C

ΔT = 20 C

ΔL = (1.2*10^-5)(195)(20)

ΔL = 0.0468 m, this is how much each span expands.

Now, we can form a triangle with the original length of each span, the new length of each span, and the rise due to buckling.

L0 = 195

Ln = 195 + 0.0468 = 195.0468

Now that we have two of the three sides of the triangle, we can solve for the last side, h.

Pythagorean theorem:

195^2 + h^2 = 195.0468^2

Solving for h,

h = 4.272 m

Answer:

Work = Work out

Work in = 5 N * d     where d is the distance the handle travels

Work out = 50 N * 7 m = 350 Joules

d = 50 N * 7m / 5 N = 70 m

This is the distance traveled by the force of 5 N

A man lifts a bucket of water from a well that is 7 meters deep. The bucket and water together weigh 50 Newtons. He turns the crank handle with a force of 5 Newtons. The effort force is 70 Newtons.

If a force is applied for a machine to move or change the position of the object is known as Effort force.

The effort force formula can be described as,

Fe = Fl. dl / de

Fe is effort force (N, lb)

Fl is load force (N, lb) (note that weight is a force)

dl is distance from load force to fulcrum (m, ft)

de is distance from effort force to fulcrum (m, ft)

Here, the given data to find the effort force is,

Fl =50 Newtons

dl = 7 meters

de = 5 Newtons.

Substituting all the values, we get,

Fe = 350/5

Fe = 70 Newtons.

Thus, the effort force is 70 Newtons.

Hence, Option A is the correct answer.

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Answer: it’s closed

Explanation: a pex

The motorcycle is going approximately 8.81 m/s.

To calculate the speed of the motorcycle, we can use the formula for kinetic energy:

Kinetic energy = 1/2 * mass * velocity^2

Given that the mass of the motorcycle is 175 kg and the kinetic energy is 6.8 x 10^3 J, we can rearrange the formula to solve for velocity:

6.8 x 10^3 J = 1/2 * 175 kg * velocity^2

Simplifying the equation:

13.6 x 10^3 J = 175 kg * velocity^2

Dividing both sides by 175 kg:

13.6 x 10^3 J / 175 kg = velocity^2

77.7 m^2/s^2 = velocity^2

Taking the square root of both sides to solve for velocity:

velocity = √(77.7 m^2/s^2)

velocity ≈ 8.81 m/s

Therefore, the motorcycle is going approximately 8.81 m/s.

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Hello,

I hope you and your family are doing well!

Newton's Second Law of Motion states that the force produced by an engine is equal to the mass of the rocket times its acceleration. The greater the force produced by the engine, the greater the acceleration of the rocket.

Please rate this 5 stars and brainliest if you find it helpful.

Happy Holidays!

Answer:

m = 8 kg

Explanation:

According to Newton's second law of motion, F = ma.

Solving for m using algebra:

m = F ÷ a

m = 48 N ÷ 6 m/s² = 8 kg

Answer:

the pressure per square inch is greater from the smaller feet.

Explanation:

different weight distribution

Explanation:

lighting converts heat energy.

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