Imagine a bacterium which is a sphere 10m in diameter. It swims through water which has a density of 1,000 kg/m and a viscosity of 20 x 10 P-) of 1 * 10 ^ (- 6!!)
A. What is the magnitude of the cous drag force acting on this bacterium? [Express your answer in PM)

When using the water displacement method to determine the volume of metal pieces, trapped air bubbles can affect density calculations.

If air bubbles are present, they increase the apparent volume of the metal pieces, leading to a higher measured volume than the actual volume. Since density is calculated as mass divided by volume, an inaccurate volume measurement would cause the calculated density to be lower than the true density of the metal.

To minimize this issue, it is essential to ensure that air bubbles are eliminated before measuring the volume. This can be done by tapping the container gently, using a thin tool to remove bubbles, or stirring the metal pieces in water before taking the measurement. By taking these precautions, the likelihood of trapped air bubbles interfering with the volume measurement is reduced, leading to more accurate density calculations. Remember that accuracy is crucial when conducting scientific experiments, and proper technique is key to obtaining reliable results.

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Star a is approximately 10 times brighter than star b.

The relationship between temperature and brightness of stars is complex and depends on various factors, including the size and composition of the star.

However, a rough estimate can be made using the Stefan-Boltzmann law, which states that the luminosity of a star is proportional to the fourth power of its surface temperature.

If star A is 3.2 times hotter than star B, its luminosity is proportional to the fourth power of 3.2, which is approximately 10. Thus, star A is approximately 10 times brighter than star B.

However, this estimate is a rough approximation and the actual brightness ratio can be different, depending on the specific stars in question and their properties.

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All four choices (a, b, c, and d) would affect the frequency of oscillation of a simple pendulum. The frequency of a pendulum's oscillation is determined by the length of the pendulum, the mass of the pendulum bob, and the acceleration due to gravity. Changing any of these factors will change the frequency of oscillation.

Increasing the mass of the pendulum bob will decrease the frequency of oscillation because it increases the force required to move the pendulum back and forth. Similarly, decreasing the initial angular displacement will also decrease the frequency of oscillation because there will be less distance for the pendulum to travel.

Increasing the length of the pendulum will decrease the frequency of oscillation because a longer pendulum takes longer to swing back and forth due to gravity. Hanging the pendulum in an elevator accelerating downward will also change the frequency of oscillation because it changes the acceleration due to gravity acting on the pendulum.

In summary, any change to the mass, length, or acceleration due to gravity acting on a simple pendulum will affect its frequency of oscillation. Hence, a, b, c, and d are the correct options.

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Known :

m = 100 gr = 0.1 kg

T1 = 90°C

T2 = 110°C

Solution :

Since the system is isolated, we can assume that no heat transfer is allowed, hence the process is adiabatic

W = m • Cv • ∆T

W = (0.1)(4.2 kJ/kg·K)(110°C - 90°C)

W = 8.4 kJ/kg

A. change in velocity over time.

Answer:

A search engine, allows the person to search upon the internet for content using 'keywords'.

Answer:

search engines allow users to search the internet for content using keywords. although the market is dominated by a few, there are many search engines that people can use.

Explanation:

The metal loop is rotating in a uniform magnetic field, the magnetic flux through the loop changing, yes is it, the flux changes, there is a change in the angle of the coil with the magnetic field.

The metal loop is an example of a coil that can convert the magnetic energy of the field into electrical energy, the motion of the metal loop in the uniform magnetic field induces an electromotive force (EMF) within the coil. Magnetic flux can be described as the amount of magnetic field lines passing through a surface. When there is a change in the magnetic field, the flux changes. When the metal loop rotates, there is a change in the angle of the coil with the magnetic field.

Since the magnetic field lines are no longer perpendicular to the plane of the coil, the flux passing through the loop changes. The flux through the loop is at its maximum when the coil is perpendicular to the magnetic field lines, it is zero when the coil is parallel to the magnetic field lines. As the coil rotates, the magnetic flux through the loop changes periodically. So therefore it can be concluded that the magnetic flux through the loop is changing when the metal loop rotates in a uniform magnetic field.

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The statement "Notation is generally used to help the electrician interpret the meaning of certain components and find contacts that are controlled by coils" is true.

Notation is commonly used in electrical diagrams and schematics to provide information and help electricians interpret the meaning of certain components and identify contacts that are controlled by coils. Notation can include symbols, labels, and specific markings that convey information about the electrical components, their functions, and their relationships within a circuit. This notation aids in understanding the circuit design, troubleshooting, and performing electrical work efficiently and accurately.

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Answer:can someone help

Explanation:

Answer:

22.22m/s

Explanation:

The momentum before a collision = momentum after collision so...

work out the momentum of the first object (the bullet)

its p = mv

0.04 kg × 300 m/s  = 0.54 kg × v

rearrange this to find v which is 0.04 x 300 = 12

so 12 = 0.54 x v

    12/0.5 = v

    v = 22.22m/s

hope this helps!

Answer:

A force unit is defined as the product of a mass unit and a unit of acceleration.

Answer:

Force can be defined as a push or a pull that changes or tends to change the state of rest or uniform motion of an object or changes the direction or shape of an object.

Explanation:

Force = M (Mass) * A (Acceleration)

The SI unit of Mass = KG

S.I. unit of acceleration is m/sec/sec = m/sec2

Hence, Unit of force is Kg m/Sec2

Since force is used so often, S. I. gives this unit a special name:

1 Newton = 1 kg m/sec2

Answer:

I would say the answer is A... but I'm not so sure ....

Answer:

it's a

Explanation:

hope this helps!!!!!!

Answer:

34kg

Explanation:

When the current flowing through an inductor is increasing, the voltage across the inductor also increases, according to Faraday's law of electromagnetic induction.

This phenomenon occurs due to the inductor's inherent property of opposing changes in current. As the current increases, the magnetic field around the inductor expands and induces a voltage across the inductor that opposes the current change. This induced voltage can be visualized as a back EMF (electromotive force) that opposes the driving voltage. The magnitude of the induced voltage depends on the rate of current change, the inductance of the coil, and the number of turns of the coil.

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--The complete Question  is,

What happens to the voltage across an inductor when the current flowing through it is increasing? --

Answer:

firts divide then multiply divide again and your and your answer should d

The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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Using the charter system conversation in the right angled value triangle we apply distance formula and get the G-plot value of 9.876 u.

The movement in a graph is determined through the two perpendicular axis in which the first coordinate represents the distance to be traveled in the x axis and the second coordinate shows the distance to be traveled in the y axis .

If you want to determine the distance between any two point in a graph the distance formula is used in such case the distance formula is applied like Pythagoras theorem.

Given:

A (1,3)

Period = 0.2 seconds

B (1,5)

Period = 0.5 seconds

Before applying distance formula we need to simplify the given value into charter system.

Where,

A become a substituted value for the argument of square on the basic structure.

Since A symmetrical is that of right angled triangle we can use the basic charter values.

Therefore A now become A(π,2)

Similarly B become B(e,nπ)

Using distance formula to find the graph plot we get:

AB = 5.6π - e×3.14

AB = 9.876

where AB is the distance between A and B.

Therefore using the charter system conversation in the right angled value triangle we apply distance formula and get the G- plot value of 9.876 u.

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Answer:

I'm pretty sure the answer is broken

Explanation:

In the scenario of a glass filled with iced coffee sitting on a table, Newton's third law identifies the action/reaction pairs as follows: the action is the downward force exerted by the glass and its contents on the table, while the reaction is the upward force exerted by the table on the glass and its contents.

Now let's explain the answer in more detail. Newton's third law states that for every action, there is an equal and opposite reaction. In this case, the action is the force exerted by the glass and its contents (iced coffee) on the table in the downward direction due to gravity. This force is a result of the weight of the glass and the coffee inside it.

As a reaction to this downward force, the table exerts an equal and opposite force in the upward direction on the glass and its contents. This upward force prevents the glass from sinking into the table and supports the weight of the glass and coffee. The action/reaction pair in this scenario involves the downward force of the glass and coffee as the action and the upward force exerted by the table as the reaction.

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1. Neoclassical economics is founded on the premise that markets efficiently distribute resources and that people act rationally to maximize their own self-interest. This point of view values the environment and its resources based on how valuable they are in supplying people with products and services, and it presupposes that the market will set the price for these resources based on their demand and scarcity. The external costs of resource depletion and environmental degradation, which are not reflected in market pricing, are not taken into account by the neoclassical paradigm. Since society as a whole bears the costs of pollution and resource depletion rather than the individuals who benefit from their use, this causes an undervaluation of natural resources and an overuse of the environment.

2. The ecological economics view is an alternative to the neoclassical view. This viewpoint acknowledges the economy's dependency on the environment and its resources and views it as a component of the biosphere. Environmental economics places value on the environment and its resources not just for their capacity to produce products and services, but also for their inherent worth and the ecosystem services they offer. In contrast to the neoclassical perspective, ecological economics acknowledges the external costs of resource depletion and environmental degradation and works to include environmental factors into economic decision-making.

3. The term "Hubbert's Bubble" describes the phenomenon of a sharp rise and subsequent collapse in the output of a non-renewable resource, like oil. It bears the name of geologist M. King Hubbert, who foresaw a peak in American oil production in the 1970s and a subsequent fall in the 1950s. According to Hubbert's Bubble, the amount of non-renewable resources that can be produced is constrained by their supply, and once their peak production is achieved, they will become more difficult to come by and more expensive to use.

4. An idea known as the "Tragedy of the Commons" illustrates how a shared resource, such as a common pasture, fishery, or groundwater basin, is overused and depleted. The tragedy arises when individuals acting in their own self-interest exploit the resource carelessly, causing degradation and ultimately causing the resource to collapse. Since the benefits of overuse are enjoyed by individuals while the costs of overuse are shared by all users, this results in a "commons dilemma" wherein individual incentives cause unsustainable resource use.

5. Human activity, including population expansion, economic development, and consumption habits, is the only factor that significantly strains our biodiversity and natural resources. The demand for natural resources rises as economies and human populations continue to expand, which causes habitat destruction, overfishing, pollution, and climate change. Invasive species introduction and disease transmission are also caused by human activity, which can have catastrophic effects on ecosystems and biodiversity.

Answer:

with teamwork

Explanation:

you need to use team work so the right answer is C

Answer:

La tensión es 85.3 N.

Explanation:

Cuando el objeto gira en dirección horizontal, la sumatoria de fuerzas se puede calcular usando la segunda ley de Newton:  

\( \Sigma F_{x} =ma_{c} \)

\( T = ma_{c} \)  

Dado que el movimiento es horizontal, el peso (que está en el eje y) no contribuye en la sumatoria de fuerzas en el eje x. Por lo que la única fuerza actuando sobre el objeto en la dirección del movimiento es la tensión.  

En donde:                                          

m: es la masa del objeto = 200 g = 0.200 kg

\(a_{c}\): es la aceleración centrípeta

La aceleración centrípeta viene dada por:  

\(a_{c} = \omega^{2} r\)

En donde:    

ω: es la velocidad angular del objeto = 3 rev/s

r: es el radio = 1.20 m

Entonces, la tensión es:

\(T = m\omega^{2} r = 0.200 kg(3\frac{rev}{s}*\frac{2\pi rad}{1 rev})^{2}*1.20 m = 85.3 N\)

Por lo tanto, la tensión es 85.3 N.  

Espero que te sea de utilidad!                                                                          

If the neutral of an unbalanced three-wire system is opened, the circuit becomes a 240 V open circuit. Since the line with the smaller load has a lower resistance, more than half the total voltage drops across it. That is, voltage rises above 120 volts.

When a neutral of an unbalanced three-wire system is opened, the circuit becomes a 240 V open circuit. This means that the voltage between the two hot wires (or line wires) in the circuit becomes 240 V.
In an unbalanced three-wire system, the current flows through both line wires and the neutral wire. The neutral wire carries the unbalanced current, which means it carries the difference between the current flowing through the two line wires. If the neutral wire is opened, the circuit becomes unbalanced because the current flowing through the two line wires is no longer equal. This causes the voltage between the two line wires to increase to 240 V.
Since the line with the smaller load has a lower resistance, it offers less opposition to the flow of current. This means that more current flows through this line, causing the voltage across this line to increase. The voltage across the other line decreases accordingly. If the load on one line is much greater than the load on the other line, then more than half the total voltage drops across the line with the smaller load. This causes the voltage on this line to rise above 120 volts.

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When a 1,100-kg car travels out of control at 50 km/h and hits a deformable highway barrier, it hits until the car comes to a stop after successively crushing its barrels. To find out the magnitude of the force F req, we can use the formula F = m × a, where F represents force, m represents mass, and a represents acceleration.

If we could find the acceleration of the car, we could calculate the magnitude of the force. To do so, we can use the formula a = (v_f - v_i) / t, where a represents acceleration, v_f represents final velocity, v_i represents initial velocity, and t represents time.


Assuming that the car comes to a stop, its final velocity v_f is 0 m/s. The time t it takes for the car to come to a stop is not given, so we cannot use this formula directly. However, we can use the work-energy principle, which states that the work done by external forces on an object is equal to its change in kinetic energy.

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Answer:

B. sugar + oxygen → carbon dioxide + water + energy

Explanation:

Energy is that which sustains living organisms, so as to perform various activities. One of the processes by which living organisms produce energy is by respiration.

Respiration involves the breathing-in of oxygen and breathing-out of carbon dioxide as a waste. The oxygen helps in breaking down molecules of carbohydrates e.g sugar in the system of living organisms into energy, carbon dioxide and water.

This process is well represented by the equation in option B.

The reaction which correctly represents the cellular respiration process is sugar + oxygen → carbon dioxide + water + energy.

Cellular respiration involves the conversion of chemical energy from food

into ATP which is needed for the cell's daily activities.

This process is done in the presence of oxygen to form products such as:

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Answer:

depends if it is wireless

Explanation:

if not a socket in a wall or surface. if not then it will probably use batteries.

The magnitude of the external magnetic flux through the wire loop decreases, and there is a counterclockwise current induced in the loop (as seen from the left).The correct answer is B, B.

When the switch on the electromagnet is closed, the magnetic field is generated. The magnetic flux passes through the loop, producing an emf and a current in the wire.The direction of the current induced in the wire can be found by Lenz's law, which states that the direction of the induced current will always be in such a way that it opposes the change producing it.In this case, the external magnetic flux through the wire loop will decrease because the magnetic field in the coil opposes the magnetic field of the electromagnet, as a result of which the direction of the induced current in the wire will be counterclockwise as seen from the left.When the switch is reopened, the magnetic flux through the wire loop decreases.

As a result of the decrease in the magnetic flux, the emf in the wire loop will be produced, and the direction of the induced current will be counterclockwise as seen from the left.

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