If a piece of cobalt were attached to a piece of iron, which metal would corrode first?.

Answer:

5.25[mile]

Explanation:

We must remember that the yard is a measure of length of the imperial system and that a Mile is also a unit of length of that system.

Therefore we must use a conversion factor that relates the yard to the mile.

\(9240 [yard]*[\frac{0,000568182miles}{1yard} ]=5.25[miles]\)

Answer:

B

Explanation:

Test

If a machine allows us to apply less force to do work, the cost is that we must apply the force over a greater distance.

The above is so because, according to the principle of work and energy, the amount of work done remains constant, but the force and distance can be traded off. In other words, if we decrease the force required to do a certain amount of work, we must increase the distance over which the force is applied in order to compensate.

Therefore, For example, consider a simple lever. By using a lever, we can apply less force to lift a heavy object, but we must move the lever over a greater distance in order to do so. The work done, which is the product of the force and the distance, remains constant. In this case, the force is reduced, but the distance over which it is applied is increased.

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The upper arm bone is shortened by a distance of 4 x 10⁻⁵ m.

Here the wrestler is doing a handstand so there will be a downward force acting on his hand due to gravity and a normal reaction force in the upward direction.

The force acting downward is the compressional force and we have to find the young’s modulus for this compressional force on the bone.

We are provided with

Radius = 2.1cm = 0.021m

Length = 38cm = 0.38 m

For young’s modulus (y) we have

Y = FL/A⧍l

Also force = mg =150 x 9.8 = 1470 N

And area = πr² = 3.14 x 0.021 x 0.021 = 1.25 x 10⁻³ m²

Therefore Y = 1470  x 0.38/ 1.25 x 10⁻³ ⧍l           (y = 1.5 x 10¹⁰ N/m²)

Therefore

                  ⧍l = 4 x 10⁻⁵ m

So the upper arm bone is shortened by a distance of 4 x 10⁻⁵ m.

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When you pour 0.0095 kg of 20.0°C water onto a 1.05-kg block of ice sitting in a large bowl initially at -15.0°C, the total heat transferred to melt the ice is approximately 350,699.603 J. First, let's calculate the heat required to raise the temperature of the water.

When you pour 0.0095 kg of 20.0°C water onto a 1.05 kg block of ice at -15.0°C, the water will transfer heat to the ice in order to melt it. To find the amount of heat transferred, we need to calculate the heat required to raise the temperature of the water from 20.0°C to 0°C and then the heat required to melt the ice.
First, let's calculate the heat required to raise the temperature of the water. The specific heat capacity of water is 4.18 J/g°C. We can use the formula Q = m × c × ΔT, where Q is the heat transferred, m is the mass of the water, c is the specific heat capacity of water, and ΔT is the change in temperature.
Q = 0.0095 kg × 4.18 J/g°C × (0°C - 20.0°C) = -0.397 J
The negative sign indicates that heat is being lost by the water as it cools down.
Next, let's calculate the heat required to melt the ice. The latent heat of fusion for water (lf) is the amount of heat required to change 1 kg of ice into 1 kg of water at 0°C. The latent heat of fusion for water is approximately 334,000 J/kg.
Q = lf × mass of ice
Q = 334,000 J/kg × 1.05 kg = 350,700 J
So, the total heat transferred is -0.397 J + 350,700 J = 350,699.603 J.
In summary, when you pour 0.0095 kg of 20.0°C water onto a 1.05-kg block of ice sitting in a large bowl initially at -15.0°C, the total heat transferred to melt the ice is approximately 350,699.603 J.

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It will take 2.857 minutes (or about 2 minutes and 51 seconds) for the fish to reach a temperature of 60 °C.

To determine the time it will take for the fish to reach a temperature of 60 °C, we can use the principle of heat conduction and the concept of temperature difference.

We know that the rate of heating by conduction is proportional to the temperature difference between the body and its surroundings. Therefore, we can write the following equation:

(T - Ts) = k * t

where T is the temperature of the fish, Ts is the temperature of the surroundings (boiling water), k is the proportionality constant, and t is the time.

Given that the initial temperature of the fish is 20 °C and it takes 5 minutes to reach 30 °C, we can substitute these values into the equation:

(30 - 100) = k * 5

-70 = 5k

Solving for k, we find k = -14.

Now we can use this value of k to find the time it will take for the fish to reach 60 °C:

(60 - 100) = -14 * t

-40 = -14t

Dividing both sides by -14, we get t = 2.857 minutes.

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A river 100 m wide flows due south at 1 m/s, a boat that goes 1 m/s relative to the water .The resultant distance will be 141m.

Option A is correct.

The sum of an object's individual vector velocities is its final velocity. The scalar product of an object's mass and its acceleration vector is equal to the sum of its vector forces.

Considering that the boat travels in a river that flows 1 m/s due south at a speed of 1 m/s due east.

The positive x and y axes should be represented by the north and east, respectively.

After that, we can convert the boat's resulting velocity into a vector.

Vr = i - j ( 1 m/s on x axis and -1m/s on y axis)

The time required to travel 100m from west to east at a speed of 1m/s is;

Time t = distance/speed = 100m/1m/s = 100s

Distance = velocity × time = (i - j) × 100 = 100i - 100j

Distance = 100i - 100j (in vector form)

Magnitude of the Resultant distance can be given as:

dr = √(dx ²+ dy²)

dr = √(100² + 100²)

dr = √(20000)

dr = 141.42m

dr = 141m

The relative velocity refers to how one observer would perceive another moving object within their own frame. The velocity of an object when there are multiple influences on its motion in a fixed reference frame is known as the resultant velocity.

At the point when an item, say, a boat, goes at a specific speed, and the medium through which it voyages, say, a stream, has its own speed, we can track down the resultant speed of the item by adding the two speeds. We find the boat's resulting velocity vector in this example.

Incomplete question:

A river 100 m wide flows 1 m/s due south. A boat that travels 1 m/s relative to the water is pointed due east as it crosses from the west bank. Relative to its starting point, the boat travels

A) 141 m.

B) 100 m.

C) 200 m.

D) more than 200 m.

E) nowhere

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The deformation of the rod is 0.0058 mm if it is made of brass with a modulus of elasticity of 80GPa

The compressive stress in the rod can be calculated by using the formula:
Stress = Force/Area
Here, the force acting on the rod is 30KN and the area can be calculated using the diameter of the rod.
Area = π/4 * (diameter)^2
= 3.14/4 * (50mm)^2
= 1963.5 mm^2
Thus, the compressive stress in the rod can be calculated as:
Stress = 30KN/1963.5 mm^2
= 15.27 N/mm^2
Next, we can use the formula:
Strain = Stress/Modulus of Elasticity
To find the deformation of the rod. Given that the rod is made of brass and has a strain of 80GPa, we can substitute the values in the formula and rearrange it to find the deformation.
Deformation = Strain * Length
= (Stress/Modulus of Elasticity) * Length
= (15.27 N/mm^2 / 80 GPa) * 3000 mm
= 0.0058 mm
Therefore, the deformation of the rod is 0.0058 mm if it is made of brass with a modulus of elasticity of 80GPa.

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In a merry-go-round rotating at constant angular speed, two children Ana and Bobby are riding at different points A and B, respectively.

The linear velocity of a point on a rotating object depends on its distance from the center of rotation and the angular velocity of the object. The farther a point is from the center of rotation, the greater its linear velocity.

Therefore, the child riding at the outermost point, which is Bobby in this case, will have a greater magnitude of linear velocity compared to the child riding at the innermost point, which is Ana.

Thus, option (b) is correct - Bobby has the greater magnitude of linear velocity. This concept is important in understanding centripetal force and its effects on objects in circular motion.

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1. Astronomical observational patterns are used to determine the history of the universe by studying the light emitted or absorbed by celestial objects. Scientists analyze the patterns in the electromagnetic spectrum, such as the distribution of wavelengths, intensity, and spectral lines, to gather information about the composition, temperature, motion, and evolution of celestial bodies.

Astronomical observational refers to the act of observing celestial objects and phenomena in the field of astronomy. It involves the use of telescopes, detectors, and other instruments to collect data and study various aspects of the universe.

2. Mount Wilson and Mount Palomar Observatories were used to observe and collect data about space due to several reasons. Firstly, the locations of these observatories provide advantages for astronomical observations.

3. The NASA Mission Statement is: "To pioneer the future in space exploration, scientific discovery, and aeronautics research." This mission statement reflects NASA's commitment to advancing human knowledge, technological innovation, and exploration beyond Earth's boundaries. NASA aims to push the boundaries of scientific understanding, develop and test new technologies, explore the cosmos, and inspire the next generation of scientists and engineers.

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If a ship weighs 52,000 tons and is in isostatic equilibrium when 6,000 tons of cargo is added, the total mass of water that will be displaced by the ship after the cargo is added is (M)= 58000 tons.

The weight is term that means that by how much gravitational force earth going to attract that object. It can be shown easily, W=mg. It is a vector quantity. It can be measured in kg.m/s²

To calculate the mass we are using the formula,

M=m₁+m₂

Here we are given,

m₁= The weight of the ship according to the question. =52,000 tons.

m₂= The weight of cargo that is added on the ship. = 6000 tons.

We have to calculate the total mass of water that will be displaced by the ship after the cargo is added is =M tons.

Now we put the values in above equation, we get

M=m₁+m₂

Or, M= 52000+6000

Or, M= 58000 tons.

So we can say that, the total mass of water that will be displaced by the ship after the cargo is added is (M)= 58000 tons.

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The correct answer is B. 50 feet.

Liquefaction is a phenomenon that occurs when water-saturated soil loses its strength and behaves like a liquid.

This can happen during an earthquake, when the shaking causes the soil particles to lose contact with each other. Liquefaction can also be caused by other factors, such as heavy rains or flooding. The depth of groundwater is an important factor in determining whether or not liquefaction will occur. If the groundwater is close to the surface, the soil is more likely to liquefy. This is because the water provides a pathway for the soil particles to move around, and it also reduces the friction between the particles. Most code documents state that liquefaction is no longer a concern once the historic high groundwater is deeper than 50 feet from the surface. This is because the soil at this depth is typically not saturated with water, and it is therefore less likely to liquefy. However, it is important to note that liquefaction can still occur at depths greater than 50 feet, especially if the soil is very loose or if there is a lot of groundwater.

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Answer:

\( { \tt{(1.54 \times {10}^{6}) + (6.15 \times {10}^{6}) }} \\ = { \tt{(1.54 + 6.15) \times {10}^{6} }} \\ = { \tt{7.69 \times {10}^{6} }}\)

Answer:

If Earth's diameter doubled but density was similar to the old Earth, the planet's mass would go up and gravity would be twice as strong. That would instantly make tides twice as much as it was before.

Explanation:

brainliest please

These two forces are called action and reaction forces and are the subject of Newton's third law of motion.

Have a luvely day!

Answer:

ask questions that the findings bring up

Explanation:

hope this helps :)

Answer:

ask questions that the findings bring up

Answer:

The speed of the car is 14.7m/second or 15 m/second approximately.

Explanation:

A microwave beam at \(2.10\times10^1^0Hz\) is generated by a stationary speed gun. It bounces off a car and returns at a higher frequency of 1030 Hz. The car's observed frequency would be the product of adding the two frequencies. That is to say,

       F =\(2.1\times10^1^0+1030\) =\(2.100000103\times10^1^0Hz\)

Using doppler effect formula

\(F=\frac{C}{C-V}\times f\)

Where

F = observed frequency

f = source frequency

C = speed of light = \(3\times10^8\)

V = speed of the car

 Putting the values in the formula -

        \(2.100000103\times10^1^0=\frac{3\times10^8}{3\times10^8-V}\times2.1\times 10^1^0\)

                 \(\frac{2.100000103\times10^1^0}{2.1\times10^1^0}\) \(=\frac{3\times10^8}{3\times10^8-V}\)

          \(1.000000049=\frac{3\times10^8}{3\times10^8-V}\)

by cross multiplication ,

   300000014.7 - 1.000000049V = \(3\times10^8\)

    Collect the like terms  

1.000000049V = 14.71429

      Make V the subject of formula

V = \(\frac{14.71429}{1.000000049}\)

V = 14.7 m/s

Therefore , the speed of the car is 15m/second approximately.

Answer:

yes

Explanation:

Answer:

99

Explanation:

Answer:

T = mg / cos θ

ac = g tan θ

Explanation:

Draw a free body diagram. There are two forces acting on the pendulum bob. A tension force T acting θ from the vertical, and gravity pulling down.

Sum the forces in the y direction:

∑F = ma

T cos θ − mg = 0

T = mg / cos θ

Sum the forces in the centripetal direction (towards the center).

∑F = ma

T sin θ = m ac

ac = T sin θ / m

Substitute for tension T:

ac = (mg / cos θ) sin θ / m

ac = (mg / m) (sin θ / cos θ)

ac = g tan θ

The velocity of the car before the brakes were applied is 88.32 ft / s

We know that,

a = ( v - u ) / t

s = ut + 1 / 2 a\(t^{2}\)

where,

a = Acceleration

v = Final velocity

u = Initial velocity

t = Time taken

s = Displacement

Given that,

v = 0

s = 300 ft

a = - 13 ft / \(s^{2}\)

a = ( v - u ) / t

- 13 = ( 0 - u ) / t

t = u / 13

s = ut + 1 / 2 a\(t^{2}\)

300 = u ( u / 13 ) + 1 / 2 ( - 13 ) ( u / 13 \()^{2}\)

300 = \(u^{2}\) / 13 -  \(u^{2}\) / 26

\(u^{2}\) = 7800

u = 88.32 ft / s

Velocity is the rate of change of distance with respect to time. It is denoted by V. Its units are mostly m/s, ft/s etc.

Therefore, the velocity of the car before the brakes were applied is 88.32 ft / s

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The actual distance beneath the surface of the plastic cube where the beetle appears to be embedded is 1.80 cm.

When an object is observed through a transparent medium, such as the polystyrene plastic cube in this case, it appears to be at a different position than its actual location due to the phenomenon of refraction. The apparent position is determined by tracing the path of light rays as they pass through the medium. In this scenario, the beetle appears to be located 1.80 cm within the plastic cube. Therefore, the actual distance beneath the surface of the plastic, where the beetle is positioned, is indeed 1.80 cm.

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answer :

force is called the magnetic force of repulsion, and it happens when two magnets have the same poles (either both north or both south) and they push away from each other.

When all the domains in a material are aligned in the same direction, the material becomes strongly magnetized.

explanation :

magnetic domains in the rings were stable and strong enough to resist the force of gravity.

In the case of the levitating rings, the magnetic domains were aligned in such a way that they created a strong magnetic field, which allowed the rings to levitate in mid-air.

tiny regions within ferro magnetic  material that have their own magnetic fields are called magnetic domains.

Magnetic domains in the rings refer to the tiny regions within the ring's ferro magnetic material that have their own magnetic fields.

Answer:What are the statements?

Explanation:

Answer:

obtuse, oblique, unaware, over stimulate, distracted, undrewhelmed...

Electricity does not flow through broken Christmas lights because a break in the circuit interrupts the flow of electrons, preventing the completion of the electrical path.

Christmas lights are typically wired in series, which means that they are connected in a continuous loop where the current flows through each bulb. When one bulb in the series is broken or burnt out, it creates an open circuit. An open circuit means that there is a gap or break in the pathway for the electricity to flow.

In a functioning circuit, the flow of electricity relies on a continuous loop where electrons move from the power source through the wires and bulbs, and back to the power source. However, when a bulb is broken, the circuit is interrupted at that point, and the electrons cannot continue their path.

This break in the circuit acts as a barrier, preventing the flow of electricity beyond that point. As a result, the remaining bulbs downstream from the broken one will not receive any electrical current, and they will not light up. To restore the flow of electricity, the broken bulb needs to be replaced or fixed, allowing the circuit to close and completing the pathway for the current to flow through the Christmas lights once again.

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NADH carries the electrons from NADH dehydrogenase to cytochrome c reductase.

Nicotinamide adenine dinucleotide (NAD) and hydrogen (H) are two molecules that naturally occur in the body and are involved in the chemical reaction that produces energy. Supplements containing NADH are used medically.

NADH is used to treat dementia and Alzheimer's disease as well as to enhance mental clarity, alertness, attention, and memory. NADH is utilized to treat chronic fatigue syndrome and enhance athletic performance due to its function in energy production (CFS).

Our bodies' production of NADH is involved in the body's process of generating energy. While there is some data that supports NADH supplements may lower cholesterol, lower blood pressure, aid in the treatment of chronic fatigue syndrome by supplying energy, and improve Parkinson's disease patients' nerve signals.

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NADH carries the electrons from NADH dehydrogenase to cytochrome c reductase.

Nicotinamide adenine dinucleotide (NAD) and hydrogen (H) are two molecules that naturally occur in the body and are involved in the chemical reaction that produces energy. Supplements containing NADH are used medically.

NADH is used to treat dementia and Alzheimer's disease as well as to enhance mental clarity, alertness, attention, and memory. NADH is utilized to treat chronic fatigue syndrome and enhance athletic performance due to its function in energy production (CFS).

Our bodies' production of NADH is involved in the body's process of generating energy. While there is some data that supports NADH supplements may lower cholesterol, lower blood pressure, aid in the treatment of chronic fatigue syndrome by supplying energy, and improve Parkinson's disease patients' nerve signals.

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Answer:

2m/s²

Explanation:

F = 12 N

m = 3kg

a = ?

F = ma

a = F/m = 12/3 = 4 m/s²

when m = 6kg

a = F/m = 12/6

a = 2 m/s²