the magnetic flux through a coil of wire containing two loops changes at a constant rate from -19 wb to 72 wbwb in 0.36 s.
what is the magnitude of the amf induced in the coil?

Answer:

below

Explanation:

that is the procedure above

The total distance traveled by Gino is 700 meters.

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a. The angular speed of the rotating nylon line is 314.16 radians per minute.

b. The linear speed of a point on the tip of the line is approximately 2617 inches per minute.

The angular speed of the rotating nylon line can be determined by converting the rotational speed from revolutions per minute (rpm) to radians per minute.

Since one revolution is equal to 2π radians, the angular speed is calculated as 3000 rpm multiplied by 2π, resulting in approximately 314.16 radians per minute.

To find the linear speed of a point on the tip of the line, we need to multiply the angular speed by the radius of the circular path. Given that the line is 5 inches long, the radius is half of that, or 2.5 inches.

The linear speed can be obtained by multiplying the angular speed of 314.16 radians per minute by the radius of 2.5 inches, resulting in approximately 785.4 inches per minute.

Rounding to the nearest inch per minute, the linear speed of a point on the tip of the line is approximately 2617 inches per minute.

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Answer:

6.5

Explanation:

Because 1.5+5=6.5

The resistance of a conductor is a fundamental property that describes how easily electrical current can flow through it. It is measured in units of ohms (Ω) and is dependent on several factors. However, the resistance of a conductor does not depend on its mass, as mass is not a property that affects electrical flow.

The length of the conductor is an important factor in determining its resistance. The longer the conductor, the greater the resistance, as the electrons have to travel a longer distance and encounter more obstacles along the way. This is why long wires are generally less desirable for electrical applications.

The cross-sectional area of the conductor is another factor that affects resistance. The larger the area, the lower the resistance, as more electrons can flow through the conductor at once. This is why thicker wires are often used for high-current applications.

Finally, resistivity is a property of the material that the conductor is made of and is a measure of how well it resists the flow of electrons. The higher the resistivity, the greater the resistance of the conductor. Materials such as copper and aluminum are commonly used for electrical applications because of their relatively low resistivity.

In conclusion, the resistance of a conductor is affected by its length, cross-sectional area, and resistivity. Mass, on the other hand, is not a factor that affects the flow of electrons and therefore has no effect on the resistance of a conductor.

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Answer:

0.44 m/s^2

Explanation:

initial velocity = 0  (since the child starts from rest)

distance covered by the child = 2 m (the length of the slide)

time taken = 3 sec

acceleration of the child = ?

using Newton's equation of motion

s = \(ut + \frac{1}{2}at^{2}\)

where s is the distance covered by the child

u is the initial velocity

a is the acceleration

t is the time spent

substituting values, we have

2 = 0(3) + \(\frac{1}{2}a*3^{2}\)

2 = 9a/2

4  = 9a

a = 4/9 = 0.44 m/s^2

Answer:

119.6 J/Kg°C

Explanation:

Data obtained from the question include:

Mass of substance (ms) = 170 g

Initial temperature of substance (Ts) = 120 °C

Volume of water = 200 mL

Initial temperature of water (Ts) = 10 °C

Temperature of the mixture (T2) = 12.6 °C

Density of water = 1 g/mL

Specific heat capacity of water (Cw) = 4200J/Kg°C

Specific heat capacity of substance (Cs) =..?

Next, we shall determine the mass of water. This can be obtained as follow:

Volume of water = 200 mL

Density of water = 1 g/mL

Mass of water =..?

Density = mass /volume

1 = mass /200

Cross multiply

Mass of water = 1 x 200

Mass of water = 200 g

Convert 200 g of water to Kg

Mass of water = 200/1000 0.2 Kg

Mass of water = 0.2 Kg

Now, we obtained the specific heat capacity of the substance using the following formula:

MwCw(T2 – Tw) + MsCs(T2 – Ts) = 0

Mass of water = 0.2 Kg

Initial temperature of water (Ts) = 10 °C

Specific heat capacity of water (Cw) = 4200J/Kg°C

Temperature of the mixture (T2) = 12.6 °C

Mass of substance (ms) = 170 g = 170/1000 = 0.17 Kg

Initial temperature of substance (Ts) = 120 °C

Specific heat capacity of substance (Cs) =..?

MwCw(T2 – Tw) + MsCs(T2 – Ts) = 0

0.2× 4200(12.6 – 10) + 0.17×Cs×(12.6 – 120) = 0

840(2.6) + 0.17Cs(– 107.4) = 0

2184 – 18.258Cs = 0

Rearrange

2184 = 18.258Cs

Divide both side by the coefficient of Cs i.e 18258

Cs = 2184/18.258

Cs = 119.6 J/Kg°C

Therefore, the specific heat capacity of the substance is 119.6 J/Kg°C

Answer:

Contact forces are forces that act between two objects that are physically touching each other.

Answer:

It would be D. Proterozoic because they appeared 542 million years ago.

Answer: It's C: Archean

Explanation: I got it right on the quiz.

Answer:

B

Explanation:

Got it right

Answer:

B. X: Releases energy to the photosphere

Y: Takes longer for photons to move through

Explanation:

Right on ED2021, goodluck!

Answer:

No, the eggs are in direct contact with the metal pan, which is in direct contact with the gas flame, so this is conduction, not radiation

Reasons:
-Thermal energy is being transferred by conduction.

-Radiation transfers thermal energy by electromagnetic waves.

-Radiation does not transfer thermal energy by direct contact.

Radiation heat transfer is a process where heatwaves are emitted that may be absorbed, reflected, or transmitted through a colder "body". Sun heats the earth by electromagnetic waves. The sun does not come in physical contact with the Earth to transfer heat. (In my opinion, the Earth touching the sun would not be on my to-do list.)

Explanation:

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(a) The gauge pressure at a depth of 250 m in seawater is approximately 2.47 MPa.

(b) At a depth of 250 m, the net force on a circular glass window with a diameter of 30.0 cm, due to the water outside and the air inside the diving bell, is approximately 1.41 kN.

(a) The gauge pressure at a certain depth in a fluid is the difference between the absolute pressure at that depth and the atmospheric pressure.

In this case, the pressure is due to the weight of the column of seawater above the given depth. The gauge pressure can be calculated using the equation:

P = ρgh

where P is the pressure, ρ is the density of seawater, g is the acceleration due to gravity, and h is the depth.

Given the density of seawater and the depth, we can calculate the gauge pressure at 250 m.

(b) To find the net force on the circular glass window, we need to consider the pressure difference between the inside and outside of the diving bell.

Since the pressure inside the bell is equal to the pressure at the surface of the water, the net force can be calculated by multiplying the pressure difference by the surface area of the window.

The net force can be given by the equation:

\(F = (P_{outside} - P_{inside}) * A\)

where F is the net force, \(P_{outside\) is the pressure outside the window, \(P_{inside\) is the pressure inside the diving bell, and A is the surface area of the window.

By substituting the calculated gauge pressure at a depth of 250 m into the equation and considering the given diameter of the window, we can determine the net force.

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Answer:

Car A has a velocity of 40 km/hr  west.

Explanation:

The velocity of an object is a vector quantity. It has both magnitudes as well as direction.

Arrows are used to show direction.

Car A is moving towards west. Car B is moving towards east-south direction. Car C is moving towards South direction. Car E is moving towards North direction.

So, the correct option is (a) i.e. Car A has a velocity of 40 km/hr  west.

The value, expressed to three significant figures, would be 1350 millimeters.

When expressing a value to three significant figures, we consider the first three non-zero digits from the left. If there are fewer than three non-zero digits, we include any leading zeros. The units associated with the value should be stated for clarity.

For example, let's consider a scenario where we are measuring the length of an object and obtain a value of 1356.78 millimeters. To express this value to three significant figures, we start from the left and count three digits: 1, 3, and 5. The next digit, 6, is not considered as it is beyond the three significant figures. Therefore, the value, expressed to three significant figures, would be 1350 millimeters.

Similarly, if we have a different scenario where we measure the mass of an object and obtain a value of 0.0034572 grams, we start from the left and count three digits: 3, 4, and 5. Again, the next digit, 7, is beyond the three significant figures. The value, expressed to three significant figures, would be 0.00346 grams.

In both examples, the units (millimeters and grams) are included to provide context and ensure clarity in the measurement.

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Oxygen moves between the respiratory system and the circulatory system when it transfers from the bronchi to the capillaries. The correct option is d.

The capillaries (small blood vessels) lining the alveolar walls allow oxygen to diffuse from the alveoli to the blood throughout this process.

Hemoglobin in red blood cells absorbs oxygen as it enters the bloodstream. Where the blood and lungs exchange gases are known as the "alveoli." Bronchi are the air passage of the lungs. It is a large passage that passes from the trachea to the lung.

Therefore, the correct option is d. bronchi, capillaries.

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The question is incomplete. The missing options are given below:

alveoli, capillaries

bronchi, trachea

capillaries, veins

bronchi, capillaries

Answer:

When replacing an existing luminaire (fixture) with a ceiling-suspended paddle fan, make sure that the existing outlet box is listed and marked as ________one that can support the fan__________

Explanation:

Because an outlet which is not listed an cannot support the fan will lead to its damage and short lifespan

The net vertical force on the balloon, when it is let go, is: Net force = Buoyant force - Weight of rubber = 0.034 N (upward) - 0.011 N (downward) = 0.023 N (upward). So the balloon will experience a net upward force of 0.023 N when it is let go.

The buoyant force on the 2.90 L helium balloon can be calculated using the formula:
Buoyant force = density of fluid x volume of displaced fluid x acceleration due to gravity
The density of air at sea level is approximately 1.2 kg/m³. Converting the volume of the balloon to m³, we get:
2.90 L = 0.00290 m³
So the buoyant force on the balloon is:
Buoyant force = 1.2 kg/m³ x 0.00290 m³ x 9.81 m/s² = 0.034 N (upward)
Next, we need to calculate the weight of the rubber in the balloon:
Weight of rubber = mass of rubber x acceleration due to gravity
The mass of rubber is given as 1.10 g. Converting this to kg and using the value of acceleration due to gravity as 9.81 m/s², we get:
Weight of rubber = 0.00110 kg x 9.81 m/s² = 0.011 N (downward)
Therefore, the net vertical force on the balloon when it is let go is:
Net force = Buoyant force - Weight of rubber = 0.034 N (upward) - 0.011 N (downward) = 0.023 N (upward)

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V or total voltage is 6 volts because when multiple power supplies of the same voltage are connected in parallel, the applied voltage is same and the current equally divides between the number of power sources.

Divide I(t) or total current 0.25 amps between the two power sources.

Is=I(t)/Ns

Is=0.25amps/2sources

Is=.125amps

Voltage is the difference in electrical potential between two points.

Current is just the rate of flow of electric charge.

Each power source supplies .125amps of current to the load

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Explanation:

It is given that,

Initial speed of a golfer, u = 29 m/s

If it travels the maximum possible distance before landing. It means that it is projected at an angle of 45 degrees.

(a) We need to find the time spent by the ball in the air. It can be calculated by using second equation of motion.

\(s=ut+\dfrac{1}{2}at^2\)

Here,

a = -g

s = 0 (it is displacement and it is equal to 0 as the ball lands on the green).

So,

\(0=29\sin(45)t-\dfrac{1}{2}\times 9.8t^2\ (\text{Initial vertical component of velocity is taken})\\\\-4.9t^2+29\times \dfrac{1}{\sqrt2}t=0\\\\-4.9t^2+20.5t=0\\\\t=0,4.184\ s\)

So, it will take 4.184 seconds in the air.

(b) let x is the longest hole in one that the golfer can make if the ball does not roll when it hits the green. It can be given by :

\(x=vt\cos\theta\\\\x=29\times 4.184\times \cos(45)\\\\x=85.79\ m\)

Hence, this is the required solution.

Answer:

nternational System of Units (SI), French Système International d'Unités, international decimal system of weights and measures derived from and extending the metric system of units. Adopted by the 11th General Conference on Weights and Measures (CGPM) in 1960, it is abbreviated SI in all languages.

Explanation:

"over the last eight years, we've delivered on that promise in many ways, both big and small, including, of course, providing health coverage to 20 million more Americans and making healthcare more affordable for all Americans."

The quotation that addresses the audience's concern about President Obama taking actions at the end of his term while waiting for President Trump to take office is:

"over the last eight years, we've delivered on that promise in many ways, both big and small, including, of course, providing health coverage to 20 million more Americans and making healthcare more affordable for all Americans."

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Answer:

Tangential speed, V = 2.78 m/s.

Explanation:

Given the following data;

Centripetal acceleration = 28m/s²

Radius = 27.5cm to meters = 27.5/100 = 0.275 meters

To find the tangential speed;

Centripetal acceleration = V²/r

Substituting into the formula, we have;

28 = V²/0.275

V² = 28 * 0.275

V² = 7.7

Taking the square root of both sides, we have;

Tangential speed, V = 2.78 m/s.

The tangential speed of the sock will be 7.7 m/sec².Tangential speed is  as the linear speed of any object travelling along a circular route.

Tangential speed is defined as the linear speed of any item travelling along a circular route.

A point on the outside edge of a turntable travels further in one complete rotation than a point towards the center.

The given data in he problem is;

a is the  centripetal acceleration =28m/s?

r is the  radius of 27.5cm

v is  the tangential speed of the sock=?

\(\rm a= \frac{v^2}{r} \\\\ \rm v= \sqrt{ar} \\\\ \rm v= \sqrt{28 \times 0.275 } \\\\ \rm v=7.7 \ m/sec^2\)

Hence the tangential speed of the sock will be 7.7 m/sec².

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Red sunsets are due to light of lower frequencies that are more capable of making their way through the Earth’s atmosphere. Sunsets take on different colors and shades because of the way that sunlight interacts with the Earth's atmosphere.

When the sunlight passes through the atmosphere, molecules and small particles in the air scatter different colors of light. This leads to colorful skies at sunrise and sunset. When the sun is low on the horizon, the sunlight must pass through more of the Earth’s atmosphere before reaching the observer's eye.

At sunrise or sunset, the light that reaches the observer's eye has a longer path through the atmosphere than light at noon. The Earth's atmosphere scatters blue light more efficiently than it scatters the lower-frequency colors. This scattering effect sends more blue light away from the viewer's line of sight. This makes the sky look blue. When sunlight passes through the atmosphere, molecules and small particles in the air scatter different colors of light.

When the sun is low on the horizon, the sunlight must pass through more of the Earth’s atmosphere before reaching the observer's eye. At sunrise or sunset, the light that reaches the observer's eye has a longer path through the atmosphere than light at noon. The Earth's atmosphere scatters blue light more efficiently than it scatters the lower-frequency colors. This scattering effect sends more blue light away from the viewer's line of sight, making the sky look blue

In conclusion, Red sunsets are due to light of lower frequencies that are more capable of making their way through the Earth’s atmosphere. Sunsets take on different colors and shades because of the way that sunlight interacts with the Earth's atmosphere.

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Here the focal length of the convex mirror as -12 cm, a light bulb with a diameter of 6 cm is placed 60 cm from the mirror. Hence, the image distance is -60 cm, and the image height is 6 cm.

To find the image distance and height, we will use the mirror formula for a convex mirror, which is given as follows;1/f = 1/v + 1/u. Where, f = focal length of the convex mirror;

v = the image distance;

u = the object distance

If the object distance is positive, it means the object is placed in front of the mirror, and if it is negative, it means the object is placed behind the mirror. The focal length of a convex mirror is always negative, as given above.

Therefore, u = -60 cm and f = -12 cm.

Plugging in the values in the mirror formula, we get:1/-12 = 1/v + 1/-60=> -5/60 = 1/v - (1/60) => -5/60 = (60 - v)/60=> v = -300/5= -60 cm

The image distance is -60 cm, which means the image is virtual and erect. The negative sign indicates that the image is formed behind the mirror.

To find the image height, we use the magnification formula:

m = -v/u= -(-60)/(-60)= 1

The magnification is 1, which means the image is of the same size as the object. The height of the light bulb is 6 cm, so the height of the image will also be 6 cm.

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Answer:Korotkoff Sounds. -tapping sounds created by turbulent blood flow in arm. -pressure is slowly being released from cuff, so systolic pressure is above that of the cuff, but diastolic is still below, so the artery opens in systole and collapses in diastole.

Explanation:

Answer:

given that

V = 12.0 m/s

U = 0 m/s

s = 28 m

Explanation:

using the equation of motion

V^2 = U^2 + 2as

12^2 = 0 + 2(28)a

144 = 56a

a = 5.5 m/s^2

v = u +at

12 = 0 + 5.5t

12 = 5.5t

t = 2.2s

Answer:

Explanation:

The LIGO (Laser Interferometer Gravitational-Wave Observatory) results help confirm the theory of General Relativity in several ways:

1.Direct detection of gravitational waves: LIGO detected gravitational waves for the first time in 2015, which was a major confirmation of one of the fundamental predictions of General Relativity. According to General Relativity, massive objects like black holes or neutron stars create ripples in space-time, which propagate as gravitational waves. The detection of these waves by LIGO provides strong evidence that these ripples in space-time exist.

2.Gravitational waves obey the predictions of General Relativity: The detected gravitational waves match the predictions of General Relativity very closely. This means that the characteristics of the waves, such as their frequency and amplitude, are consistent with what is expected from the theory. Any deviations from the predictions of General Relativity would have suggested that the theory is incomplete or incorrect.

3.Confirmation of the equivalence principle: General Relativity predicts that all objects, regardless of their mass or composition, will fall at the same rate in a gravitational field. This is known as the equivalence principle. LIGO's observations of gravitational waves from the collision of two black holes provide strong evidence for the equivalence principle.

4.Verification of the behavior of space-time: General Relativity predicts that the warping of space-time due to the presence of massive objects will cause gravitational waves to travel at the speed of light. LIGO's observations confirm this prediction.

Overall, the LIGO results provide strong confirmation of the theory of General Relativity and have opened up a new field of astronomy through the detection of gravitational waves. The observations have allowed scientists to test the theory in a new regime and have provided important insights into the behavior of space-time and the nature of gravity.