The difference(s) between recirculating aquaculture systems (RAS) and net pen
aquaculture operations is/are that
A) unlike net pen aquaculture, RAS operations are very limited in the type of
fish they can culture; most fish, especially the commercially profitable
species, do not do well in enclosed facilities.
B) RAS facilities are more habitat-friendly than net pen farms, which displace
wetland ecosystems, such as mangrove swamps, in coastal areas.
C) in contrast to net pen aquaculture, RAS operations are low-tech and easy
to set up.
D) since RAS operations are very labour-intensive, they are better suited than
net pen systems for developing countries, where labour is cheap and the
market for farm-raised fish is large.
E) net pen aquaculture, being biosecure, poses a much lower risk regarding
the escape of non-native species than do RAS operations.

When the cylindrical rocket enters a uniform environment in empty space, it will continue coasting at a constant velocity unless acted upon by external forces.

In the absence of any external forces, such as gravity or air resistance, the rocket will experience no net force acting on it. This means that the rocket will maintain its initial velocity, v0, and continue coasting through empty space.

The rocket's mass, mr, and the mass of its fuel, mf, do not directly affect its velocity in a vacuum once it has been set in motion. The rocket's diameter, 2r, is also not relevant to its coasting behavior.

However, it's important to note that as the rocket expends its fuel, its mass will decrease, resulting in a higher velocity due to conservation of momentum. This is known as the rocket's propulsion phase, which occurs prior to entering empty space.

Once the rocket enters the uniform environment of empty space, where there are no external forces acting on it, its velocity will remain constant unless influenced by other factors, such as gravitational forces from nearby celestial bodies.

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Answer:

Explanation:

Given,

Mass ( m ) = 10 kg

Force ( f ) = 2 Newtons

Acceleration ( a ) = ?

Now, let's find the acceleration :

We know that,

\(f = ma\)

Plug the values

\(2 = 10a\)

Swap the sides of the equation

\(10a = 2\)

Divide both sides of the equation by 10

\( \frac{10a}{10} = \frac{2}{10} \)

Calculate

\(a = 0.2 \: {metre \: per \: second \: }^{2} \)

Hope this helps...

Best regards!!

Answer:

F. The length of day would be longer

Explanation:

Answer: faster

Explanation:

Given

hammer is dropped from a height of  12 ft on the surface of the moon

Here, the potential energy is converted into kinetic energy

\(\Rightarrow mgh=\dfrac{1}{2}mv^2\\\\\Rightarrow v=\sqrt{2gh}\)

That is velocity is a function of the square root of height. The more the height, greater is the velocity.  

So, the hammer hits the ground faster .

Answer: 1.6958*10^3 kW-hr

Explanation:

The barrel of oil contains around 6.1*10^9 J of energy.

We want this energy expressed in kW-hr.

We know that:

1J = 2.78*10^(-7) kW-hr

Then  6.1*10^9 J will be equal to 6.1*10^9  times the above amount.

This is:

E =  (6.1*10^9)*(2.78*10^(-7) kW-hr) = (6.1*2.78)*(10^9*10^(-7)) kW-hr

  = 16.958*10^(9 - 7) kW-hr

  =  16.958*10^2 kW-hr

  = 1.6958*10^3 kW-hr

Energy is the ability to do work. There are a few types of energy, these types are as follows:-

The barrel of oil contains around 6.1*10^9 J of energy.  We want this energy expressed in kW-hr.

One joule of energy has   1J = 2.78*10^(-7) kW-hr .

Therefore, the \(6.1*10^9\)J will be equal to \(6.1*10^9\) times the above amount.

Hence, the energy will be

E =  \((6.1*10^9)*(2.78*10^7 )\)  

 =\(16.958*10^9-7\)

=  \(1.6958*10^3 kW-hr\)

Hence, the correct option is    \(1.6958*10^3 kW-hr\)

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Answer: The mechanical advantage of the crowbar  9

Answer:

9

Explanation:

50N-load

450N-effort

m.a=load÷effort

450÷50=9

Answer:

In the first one circle : luster

second circle: atsuete seeds

third: dentures

Explanation:

Well I ain’t sure

Answer:

Potential energy is the stored energy of position possessed by an object. In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength (9.8 N/kg on Earth) - sometimes referred to as the acceleration of gravity.

Explanation:

Answer:

15129.8 Kg•m/s

Explanation:

From the question given above, the following data were obtained:

Mass = 2020 kg

Velocity = 7.49 m/s

Momentum =?

Momentum is simply defined as the product of mass and velocity. Mathematically, it is expressed as:

Momentum = mass × velocity

With the above formula, we can obtain the momentum of the Elephant as follow:

Mass = 2020 kg

Velocity = 7.49 m/s

Momentum =?

Momentum = mass × velocity

Momentum = 2020 × 7.49

Momentum = 15129.8 Kg•m/s

Thus, the momentum of the Elephant is 15129.8 Kg•m/s

a) The kinetic energy of the dart after it is thrown is 2.376 J.

b) The speed of the dart is 18.45 m/s.

c) If the dart were thrown straight upwards, the maximum height it would reach is 17.0 m.

a) The work done on the dart by the applied force is given by:

work = force x distance = 4.40 N x 0.54 m = 2.376 J

Since no energy is lost due to friction, all of this work is converted to the kinetic energy of the dart:

kinetic energy = work = 2.376 J

b) The kinetic energy of the dart can also be expressed as:

kinetic energy = (1/2) x mass x velocity^2

Rearranging this equation gives:

velocity^2 = (2 x kinetic energy) / mass

Substituting the values from part a) gives:

velocity^2 = (2 x 2.376 J) / 0.028 kg = 340.29 m^2/s^2

Taking the square root of both sides gives:

velocity = 18.45 m/s

c) When the dart is thrown straight upwards, its initial vertical velocity is zero. The maximum height it will reach can be calculated using the formula:

maximum height = (initial velocity^2) / (2 x acceleration)

where acceleration is the acceleration due to gravity, which is approximately 9.81 m/s^2.

Substituting the speed calculated in part b) gives:

maximum height = (18.45 m/s)^2 / (2 x 9.81 m/s^2) = 17.0 m

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Each aircraft must be moving at a speed of 85.75 km/hr towards each other to hear a pitch that is 2 times the emitted frequency.

What is frequency ?

Frequency is a physical quantity that describes the number of occurrences of a repeating event per unit of time. It is often measured in Hertz (Hz), which represents the number of cycles or vibrations per second.

In the context of waves, such as sound waves or electromagnetic waves, frequency refers to the number of complete cycles of the wave that occur in one second. A high frequency wave has more cycles per second than a low frequency wave.

Frequency is also an important concept in physics, particularly in the study of oscillations and waves. It is used to describe the behavior of systems that oscillate or vibrate, such as a simple pendulum or a guitar string. In these cases, the frequency of the oscillation is related to the natural frequency of the system, which is determined by its mass, stiffness, and other properties.

When two aircraft are moving towards each other, the sound waves from each aircraft are compressed, leading to a higher pitch than the emitted frequency. The pitch heard by the pilots of the aircraft can be calculated using the following formula:

Pitch heard = Emitted frequency * (Speed of sound + Speed of observer) / (Speed of sound - Speed of source)

Since the two aircraft are flying towards each other at the same speed, we can assume that the speed of one aircraft is x km/hr, and the speed of the other aircraft is also x km/hr. Therefore, the relative speed between the two aircraft is 2x km/hr.

Substituting the values given in the formula, we get:

2 * Emitted frequency = Emitted frequency * (343 + 2x) / (343 - x)

Simplifying this equation, we get:

686 - 2x = 343 + 2x

4x = 343

x = 85.75 km/hr

Therefore, each aircraft must be moving at a speed of 85.75 km/hr towards each other to hear a pitch that is 2 times the emitted frequency.

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Answer:

225 m//s

Explanation:

It ran 5m/s so 5x45=225

Answer:

225 meters

Explanation:

If it is running 5 meters per seconds, and it ran 45 seconds, you would need to multiple the seconds it ran by the speed per second: 5 • 45

5 • 45 = 225

It 4.5 hours for the light bulb to consume 8100 watt-hours of power.

The energy consumed by the light blub = 8100 watt-hours.

Let the time taken be t hours.

We know that;

Energy = power × time

Energy (E) =  8100 watt-hours

Power (P) = 1800 watt

Time (t) =?

8100 =  1800 × t

= 8100 / 1800

= 4.5 hours

The time taken by the light bulb is 4.5 hours.

Therefore, it could take 4.5 hours for the light bulb to consume 8100 watt-hours.

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The molecular formula of the substance containing carbon, hydrogen, and oxygen with a molar mass of 234 g/mol is C9H18O6.

To determine the molecular formula, we need to analyze the molar masses and the products of combustion. We are given the molar masses of CO₂ (44.01 g/mol) and H₂O (18.02 g/mol).

First, let's calculate the mass of carbon and hydrogen in the substance:

Mass of carbon: (0.406 g CO₂) × (1 mol CO₂/44.01 g CO₂) × (1 mol C/1 mol CO₂) × (12.01 g C/1 mol C) = 0.111 g C

Mass of hydrogen: (0.250 g H₂O) × (1 mol H₂O/18.02 g H₂O) × (2 mol H/1 mol H₂O) × (1.01 g H/1 mol H) = 0.279 g H

Next, we can calculate the mass of oxygen by subtracting the mass of carbon and hydrogen from the total molar mass:

Mass of oxygen: 234 g/mol - (0.111 g C + 0.279 g H) = 233.61 g/mol

Now, we need to find the mole ratio of carbon, hydrogen, and oxygen in the substance:

Moles of carbon: 0.111 g C / 12.01 g/mol = 0.00924 mol C

Moles of hydrogen: 0.279 g H / 1.01 g/mol = 0.276 mol H

Moles of oxygen: 233.61 g/mol / 16.00 g/mol = 14.60 mol O

Dividing the moles by the smallest value (0.00924 mol) gives us the empirical formula: C₁H₂₉.94O₁₅.79 (rounded to the nearest whole number).

To determine the molecular formula, we divide the molar mass (234 g/mol) by the empirical formula mass (C₁H₂₉.94O₁₅.79) which is approximately 29.3.

Molecular formula = (C₁H₂₉.94O₁₅.79) × 29.3 = C₉H₁₀O₅

The molecular formula of the substance containing carbon, hydrogen, and oxygen with a molar mass of 234 g/mol is C9H18O6.

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Answer:

D

Explanation:

There are no exceptions to these laws under specific stated conditions..

The laws of science are statements that describe or predict a range of phenomena as they appear in nature. Laws explain facts determined by experiment. Laws do not have absolute certainty and be changed by future experiments and observations.

Answer:

there are no exceptions to these laws under specific stated conditions.

Explanation:

There are no exceptions to scientific laws under certain stated conditions. This is the main factor that distinguishes scientific theories from scientific laws.

Both scientific theories and laws are based on extensive observations, experimentation, and reasoning, but scientific theories are subject to change over time as new technology is invented and new evidence emerges.

Answer:

A workout injury can happen to anyone, no matter your experience or fitness level. People hurt themselves in all kinds of ways when they work out. Even walking can cause an injury. But you can significantly cut your risk of getting hurt by following certain workout precautions. There are simple steps that can help keep you injury-free during your workout.

Every workout should begin with a warm-up and end with a cool-down period. A warm-up helps your body get ready for exercise. It gradually increases your heart rate and loosens your muscles and joints. Cool-down after you work out so, it brings your heart rate back to normal. Walking for 5 to 10 minutes after you work out is one way to cool down. Do dynamic stretching before and after you work out. This will help increase flexibility. Don't push yourself too hard. As your fitness abilities increase and you will be able to challenge yourself more.

Hope this helps

Maintaining physical fitness is very important in today's world. Each and everyone should be involved in physical fitness.nowaday people are so busy with their work that they have forgotten health is wealth.

Even if we get engaged in physical fitness activity we can some time get insuries . some of tips that can help prevent from getting physical fitness injury, warm up exercises should be done before exercise to avoid muscle strength.safety precautions should be taken if you are dealing with heavy objects .

hence we should maintain physical fitness with getting rid of injury that may occur

mark me

The magnitude of the net force on the truck is 2070.5 N.

Frictional force is the force that opposes motion or attempted motion between two surfaces in contact. It arises as a result of the interlocking of irregularities on the surfaces in contact, and it acts in the direction opposite to the direction of motion or attempted motion.

Frictional force can be classified into two types: static friction and kinetic friction. Static friction is the force that prevents an object from moving when a force is applied to it, while kinetic friction is the force that opposes the motion of an object that is already in motion.

The normal force is equal to the weight of the truck, which can be calculated as:

weight = mass x gravity

where gravity is approximately 9.81 m/s^2.

So the weight of the truck is:

weight = 900 kg x 9.81 m/s^2 = 8829 N

Therefore, the normal force is:

normal force = weight = 8829 N

And the frictional force is:

frictional force = 0.5 x 8829 N = 4414.5 N

Next, we can find the net force on the truck by subtracting the force of friction from the force exerted by the car:

net force = 2345 N - 4414.5 N = -2070.5 N

Note that the negative sign indicates that the net force is in the opposite direction to the force exerted by the car, which makes sense since the truck is slowing down.

Finally, we can use Newton's second law to find the acceleration of the truck:

net force = mass x acceleration

-2070.5 N = 900 kg x acceleration

acceleration = -2.3 m/s^2

Again, the negative sign indicates that the truck is slowing down.

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Answer:

The term "scientific methods" are more accurate than "scientific method" because "s" used in "scientific methods" makes the word plural and science experiments use several observations to get a result and not only based on single observation.

So, "scientific methods" is a plural term that is more accurate than "scientific method".

The solution is (v, u) = (- 585.709, 593,034). Please notice that the value of v only means that the direction of the real vector is antiparallel to the supposed one.

According to the definition of vector sum and vectors in rectangular form, we must solve the following vector equation:

(0, 0) = 205 · (cos 23°, - sin 23°) + v · (- cos 75°, sin 75°) + u · (- cos 55°, - sin 55°)

(0, 0) = (188.703, 80.100) + v · (- 0.259, 0.966) + u · (- 0.574, 0.819)

(- 188.703, - 80.100) =  v · (- 0.259, 0.966) + u · (- 0.574, 0.819)

Then, we must solve the following system of linear equations:

- 0.259 · v - 0.574 · u = - 188.703

0.966 · v + 0.819 · u = - 80.100

The solution is (v, u) = (- 585.709, 593,034). Please notice that the value of v only means that the direction of the real vector is antiparallel to the supposed one.

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Answer:410.022779

Explanation: To figure out force, you use the equation F=MA. Well, in this case, you're trying to find M. The mass. All you have to do is rearrange. F=MA turns into A=F/M.

Answer:

How much an object has moved

Answer:

the answer is c cirrus clouds

Explanation:

Answer:

1.276 meter per second per second

Explanation:

total speed increase 6 m/s divided by the time

Answer:

4500 joules

Explanation:

since work(joules) = force(newtons) x distance(meters),

150N x 30M = 4500 Joules

Answer:

4500 joules

Explanation:

150 N x 30 M = 4500 joules

Parallel Plate Capacitors are the type of capacitors which that have an arrangement of electrodes and insulating material (dielectric). The two conducting plates act as electrodes.

There is a dielectric between them. This acts as a separator for the plates.

The electric field between the plates,

E = q/Aε₀

Therefore, the potential difference between the plates can be written as,

V = Ed

V = dq/Aε₀

where d is the separation between the plates.

The capacitance of the parallel plate capacitor is given by,

C = ε₀A/d

The energy stored in the parallel plate capacitor,

U = q²/2C

The charge on the plates does not change if the capacitor is not connected to the battery.

Since, the electric field depends on the charge and surface area, the electric field also remains constant.

It is said that the plates are pulled apart. So, the distance, d increases.

Therefore, the potential difference increases and the capacitance decreases.

Due to the decrease in capacitance, the energy stored in the parallel plate capacitor increases.

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Magnetron in a kitchen microwave oven operates as a resonant circuit similar to an RLC circuit. The resonant frequency is determined by the dimensions of the resonant cavity and the magnetic field strength. This generates high-frequency microwaves that are used to heat food.

A magnetron in a kitchen microwave oven is a type of vacuum tube that generates microwaves used to heat food. The magnetron operates by using a combination of electric and magnetic fields to excite electrons and cause them to move in a circular motion.

This movement creates a resonant circuit that generates a high-frequency electromagnetic wave at a frequency of 2.50 GHz. An RLC circuit is an electrical circuit that contains a resistor, an inductor, and a capacitor.

The circuit can resonate at a certain frequency, which is determined by the values of the components in the circuit. In a magnetron, the resonant circuit is created by the interaction of the magnetic field and the electrons moving in the circular motion.

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Please find attached photograph for your answer.

Hope it helps.

Do comment if you have any query.

Answer

v= 1/R mark me brainliest pls