A conducting cube is dropped in the earth's magnetic field. Which face of the cube is at highest voltage? (a) north (b) south (c) east (d) west (e) top (f) bottom

For the 6.8 Ω resistors, the voltage across it is V1 = 4.0 V, so the current through it is I1 = V1 / R1 = 4.0 V / 6.8 Ω = 0.588 A

For the 1.9 Ω resistors, the voltage across it is V2 = 12 V, so the current through it is:

I2 = V2 / R2 = 12 V / 1.9 Ω = 6.32 A, directed from the negative terminal of V2 to the positive terminal.

Therefore, the current in the 6.8 Ω resistor is 0.588 A directed from the positive terminal of V1 to the negative terminal, and the current in the 1.9 Ω resistor is 6.32 A directed from the negative terminal of V2 to the positive terminal.

Resistors are electronic components used in electrical circuits to provide a specific amount of resistance to the flow of electric current. They are designed to impede the current flow and reduce the amount of voltage flowing through a circuit.

An electrical circuit consists of a closed loop of conductive material through which electric current can flow. A circuit typically includes a power source, wires to connect the components, and various components such as resistors, capacitors, inductors, diodes, and transistors, among others.

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Answer:

Violet

Explanation:

Occurring to Google red has the longest while violet has the shortest. Violet is the shortest at 380 nanometers.

Answer:

violet

Explanation:

Violet has the shortest light wavelength.

Please mark brainliest. Thanks!!!!

The two results, the best-case complexity of Θ(n) for the Jarvis March convex hull algorithm and the lower bound of Ω(n log n) for the convex hull problem, are not contradictory.

The best-case complexity of Θ(n) for the Jarvis March convex hull algorithm means that in certain scenarios, the algorithm can achieve a linear time complexity, where the running time grows linearly with the input size. This best-case scenario occurs when the input points are already sorted in a specific order, such as sorted by their polar angles.

On the other hand, the lower bound of Ω(n log n) for the convex hull problem indicates that any algorithm that solves the convex hull problem must take at least Ω(n log n) time in the worst case, where the running time grows at least logarithmically with the input size.

These two results are not contradictory because they refer to different aspects of the problem. The best-case complexity of Θ(n) for the Jarvis March algorithm represents a specific scenario where the algorithm performs optimally, while the lower bound of Ω(n log n) applies to any algorithm attempting to solve the convex hull problem in the worst case. In other words, the Jarvis March algorithm's best-case complexity does not contradict the lower bound; it simply represents a favorable scenario where the algorithm can achieve linear time complexity.

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I don't know please mark as brilliant

When measuring the length of a pendulum, it is important to measure to the middle of the stack of pennies because this point is the center of mass of the pendulum. The center of mass of an object is the point at which the object's mass is evenly distributed, meaning that if the object is suspended from this point, it will remain in a stable position.

For a pendulum, the center of mass is located at the point where the mass is concentrated, which is usually at the bottom of the pendulum. However, when using a stack of pennies to adjust the length of the pendulum, the center of mass shifts to the middle of the stack.

Measuring to the middle of the stack of pennies ensures that the length of the pendulum is measured from the point of maximum stability. If the length were measured from the bottom of the stack of pennies, for example, the center of mass would be shifted, and the pendulum would not swing in a predictable manner.

Additionally, measuring to the middle of the stack of pennies allows for consistent measurements between different pendulums. By measuring to a standardized point, such as the middle of the stack of pennies, researchers can compare the lengths and periods of different pendulums, which is important in experiments that require precise measurements.

In summary, measuring to the middle of the stack of pennies ensures that the length of the pendulum is measured from the point of maximum stability and allows for consistent measurements between different pendulums.

Answer:1.  verbal communication, which you listen to a person to understand what they are saying 2. written communication, you read what a person is trying to say 3. nonverbal communication, which you observe what someone is trying to say, like sign language.

Explanation:

Answer:

C

Explanation:

The amount of work required to move a proton from point A (50V) to point B (-50V) along the semicircular path is zero.

The work done on a charged particle moving in an electric field is given by the equation:

Work = qΔV,

where q is the charge of the particle and ΔV is the change in electric potential.

In this case, the charge of the proton is constant (q = 1.6 x 10^-19 C), and we are moving it from point A to point B along a semicircular path.

Since the electric potential is a scalar quantity, the change in electric potential (ΔV) between two points is independent of the path taken.

Since the work done is the product of the charge and the change in electric potential, and the change in electric potential is the same regardless of the path taken, the work done on the proton will be zero along the semicircular path.

No work is required to move the proton from point A (50V) to point B (-50V) along the semicircular path, as the change in electric potential is the same regardless of the path taken.

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The speed of a sound wave in air is 341.33 m/s when the temperature of the air is 17.3 °C.

In terms of physics, sound is a vibration that travels through a transmission medium like a gas, liquid, or solid as an acoustic wave. Sound is the reception of these waves and the brain's perception of them in terms of human physiology and psychology.

At 0° C,  speed of sound in air is  = 331 m/s

speed of sound ∝ √T

Hence, at 17.3°C, the speed of sound in air is = 331 m/s ×√{(273+17.3)/273}

= 341.33 m/s.

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Answer:

49 kg is the answer to the question

Answer:

1kg = 10N (rounded off)

490N = ?kg

490 / 10 = 49

Answer: 49kg

Answer:

You first push in then when the syringe is full push the out

Explanation:

1. in

2. out

but u should watch a You-tube video just in case

I hoped this helped!

Answer:

the ball's Stored energy 2. The balls altitude slowly comes to a stop going back into potential Energy

Explanation:

Answer:b

Explanation:

Answer:

both statements are truth

Explanation:

a-The Joule effect, also called Joule's law, is the thermal manifestation of electrical resistance. ... In all these cases, it is intended to generate thermal energy with electricity passing through its conductors. This heat they give off is due to the Joule effect.

b-sure of a liquid tank depends only on the density of the liquid and depth from the free surface. It is a scalar quantity and is same in all directions, at a point.

The pH scale measures the acidity or alkalinity of a solution, with values ranging from 0 to 14. A pH value of 7 represents a neutral solution, while values less than 7 indicate acidity and values greater than 7 indicate alkalinity.

The pH scale is logarithmic, which means that each unit change in pH represents a ten-fold change in the concentration of hydrogen ions (H+) in the solution.
A pH of 12 represents a basic solution, while a pH of 8 is also basic, but less so. To determine how many times more basic a pH of 12 is compared to a pH of 8, we can calculate the difference in their pH values and then use the properties of logarithms to find the relative concentration difference.
The difference in pH values is 12 - 8 = 4. Since the pH scale is logarithmic, a difference of 4 units represents a 10^4 or 10,000-fold difference in the concentration of hydrogen ions. Thus, a solution with a pH of 12 is 10,000 times more basic than a solution with a pH of 8. This significant difference highlights the importance of understanding and accurately measuring pH levels in various contexts, such as environmental studies, industrial processes, and biological systems.

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Answer: There are five principles of fitness out of which two are overload principle and rest and recovery principle. Overload principle is one of the most important principle which tell that to gain and improve the fitness one should do the hard work.  

Slowly and gradually the intensity and time of exercise are increased so that our body can adapt to the hard work. Overload principle plays an important role in improving the skills and improving performance during exercise and sports.

Rest and recovery principle is important to relax the body and release the stress that happens due to intense training like in case of weight lifting one day rest should be taken to repair and rebuild the muscles. This allows the body to encounter the fatigue and improve performance.

Explanation:

The power exerted by the horse is 1,000 watts, which is equivalent to 1 kilowatt (kW).

To find the work done by the horse and the power exerted, we can use the following equations:

Work = Force x Distance x cos(theta)

Power = Work / Time

where theta is the angle between the direction of the force and the direction of the displacement. Assuming that the force is applied horizontally and the displacement is also horizontal, the angle theta is 0 degrees, so cos(theta) = 1.

Given that the force applied by the horse is 1500 N and the distance moved is 10 m, we can calculate the work done as follows:

Work = Force x Distance x cos(theta)

Work = 1500 N x 10 m x 1

Work = 15,000 J

Therefore, the work done by the horse in pulling the tree trunk is 15,000 joules.

To find the power exerted by the horse, we need to divide the work done by the time taken. Given that the time taken is 15 seconds, we have:

Power = Work / Time

Power = 15,000 J / 15 s

Power = 1,000 W

Therefore, the power exerted by the horse is 1,000 watts, which is equivalent to 1 kilowatt (kW).

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The gravitational force of attraction between two objects is 2.964 x 10⁻9 N. So, the correct option is D.

Gravitational force is defined as the force of attraction experienced by a body due to the gravity of earth.

Here,

Mass of each body,

m₁ = m₂ = 5 kg

Distance between the masses, r = 0.75 m

The equation for gravitational force is given by,

F = Gm₁m₂/r²

where G is the gravitational constant.

Therefore,

F = (6.67 x 10⁻¹¹x 5 x 5)/(0.75)²

F = 166.75 x 10⁻¹¹/0.5625

F = 2.964 x 10⁻9 N

Hence,

The gravitational force of attraction between two objects is 2.964 x 10⁻9 N.

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Answer:

A

Explanation:

If the mass of an object increases, then its kinetic energy will also increase because of their direct relationship between them.

Mass and kinetic energy are directly proportional to each other, which means that if the mass of an object increases, its kinetic energy will also increase.

The relationship between kinetic energy and mass is due to the fact that kinetic energy is a measure of the energy of motion of an object, and the mass of the object determines how much energy is required to move it from one place to another.

Therefore, if you increase the mass of an object, you are also increasing the amount of energy that is required to move that object.

As a result, the kinetic energy of the object also increases because it is a direct function of the mass of the object.

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The cumulative distance traveled by the bird is 3.12 km.

The cumulative distance of the bird is calculated as follows;

Apply the principle of relative velocity.

Vbt - Vrt = L

(Vb - Vr)t = L

where;

Substitute the given parameters and solve for time of motion,

(41 - 8.2)t = 2.5

32.8t = 2.5

t = 2.5/32.8

t = 0.076 hr

Distance traveled by the bird = 0.076hr x 41 km/hr = 3.12 km

Thus, the cumulative distance traveled by the bird is 3.12 km.

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First find time taken to reach submarine

\(\\ \bull\tt\dashrightarrow t=\dfrac{80}{2}=40s\)

\(\\ \bull\tt\dashrightarrow Distance=Velocity \times Time\)

\(\\ \bull\tt\dashrightarrow Distance=1460(40)\)

\(\\ \bull\tt\dashrightarrow Distance=58400m\)

\(\\ \bull\tt\dashrightarrow Distance=58.4km\)

Answer:

116800 meters away i think:)

Explanation:

Answer:

10m/s

Explanation:

2m/s  x  5s=10m/s

Theta = position angle, t = time, and w = angular velocity, where w = angular velocity, theta = position angle, and t = time. Angular velocity is the rate of change of an object's position angle with respect to time.

Thus, An object's rate of rotation and direction of rotation are both described by its angular velocity.

It is customary for the positive direction to be in the counterclockwise direction. Here are some angular velocity issues for practice. The ratio of the angular displacement () to the time of motion, for a constant angular velocity, is the angular velocity.

Angular velocity only applies to things that are moving in a circular motion, making it less frequent than linear velocity.

A racecar on a circular track, a roulette ball on a wheel, or a Ferris wheel are a few examples of objects with angular motion.

Thus, An object's rate of rotation and direction of rotation are both described by its angular velocity.

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Answer:

g = 1.25m/s²

Explanation:

Given the following data;

Mass = 5kg

Height = 6m

Gravitational potential energy = 24J

To find the acceleration due to gravity;

Potential energy can be defined as an energy possessed by an object or body due to its position.

Mathematically, potential energy is given by the formula;

\( P.E = mgh\)

Where,

P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

GPE = mgh

Substituting into the equation, we have;

24 = 5*6*g

24 = 30g

g = 30/24

g = 1.25m/s²

Therefore, the acceleration due to gravity on Planet X is 1.25m/s².

Answer:

g=0.8m/s^2

Explanation:

M=5kg

h=6m

GPE=24J

GPE=Mgh

g=GPE/Mh

g=24J/(5kg)(6m)=0.8

g=0.8m/s^2

An example of a situation that would meet requirements for the first law of thermodynamics, but violate the second law is mentioned below.

The first law of thermodynamics states that energy can neither be created nor be destroyed. The second law of thermodynamics states that the entropy of the universe increases for a spontaneous process. The laws of thermodynamics are true and proved. So, the below scenarios are imaginary and not possible in real world.

Normally heat flows from warmer body to colder body until both the bodies are at same temperature. But is this process is spontaneously reversed, entropy will not increase. So, it is a violation of second law but first law is still true in this impossible process.

Therefore, an example of a situation that would meet requirements for the first law of thermodynamics, but violate the second law is mentioned above.

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Our Sun will not become a nova because this phenomenon primarily occurs in stars with a binary companion. The correct option is D.

Novas typically involve a white dwarf star and a companion star in a close binary system. The white dwarf accumulates matter from the companion star, and when the accumulated matter reaches a certain mass, a thermonuclear explosion occurs, leading to a sudden increase in brightness, which we observe as a nova.

Stars that are much less massive or much more massive than the Sun, as well as those without planetary systems, are not the primary factors contributing to a nova event. The key factor is the presence of a binary companion, which allows for the transfer of matter necessary for the explosion to take place.

Since our Sun is a single star without a binary companion, it will not become a nova. Instead, it will eventually exhaust its nuclear fuel and expand into a red giant. Following this phase, it will shed its outer layers and form a planetary nebula, leaving behind a white dwarf at its core, which will eventually cool down over billions of years. So, the correct option is D.

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The acceleration of the object is approximately 2.38 m/s². To find the acceleration of the object, we can use the formula:

acceleration = change in velocity / time

The object goes from rest to a speed of 10 m/s in 4.2 seconds, the change in velocity is:

change in velocity = final velocity - initial velocity

change in velocity = 10 m/s - 0 m/s

change in velocity = 10 m/s

Plugging the values into the formula, we have:

acceleration = change in velocity / time

acceleration = 10 m/s / 4.2 s

acceleration ≈ 2.38 m/s²

Therefore, the acceleration of the object is approximately 2.38 m/s².

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To study drag force over a flat plate, the influencing variables for this fluid flow problem are:Reynold's number lamp post during the storm is 24.75 Hz .

It is the ratio of inertial forces to viscous forces in fluid flow problems and is a dimensionless quantity. It describes the flow conditions of the fluid flow problem.The drag coefficient (Cd): It is a dimensionless quantity that is a measure of drag force experienced by the object under study.The pressure distribution on the flat plate: The pressure distribution over the flat plate describes the variation in pressure along the length of the plate.

Sketch a graph to show two dimensionless quantities relevant to this fluid flow problem:Two dimensionless quantities that are relevant to this fluid flow problem are:Reynold's number (Re): It is the ratio of inertial forces to viscous forces in fluid flow problems and is a dimensionless quantity. It describes the flow conditions of the fluid flow problem. It is plotted on the x-axis of the graph.The drag coefficient (Cd): It is a dimensionless quantity that is a measure of drag force experienced by the object under study. It is plotted on the y-axis of the graph.The graph is shown below:b) Dimensionless variables relevant to the fluid flow problem by using Buckingham -theorem:

The required wind speed in the wind tunnel experiment is 0.45 m/s.

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The final speed of the bike is 5 m/s.

Speed is  measured as the ratio of distance to the time in which the distance was covered.

To calculate the final velocity, we use the formula below.

Formula:

v = u+at................ Equation 1

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, the final speed of the bike is 5 m/s.

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