Salinity measures the amount of salts dissolved in water. Which statement correctly explains what happens whenaquatic animals are moved to an aquatic ecosystem with a different salinity?

Within 10 seconds, the speed of an automobile moving north at 30 m/s drops to 10 m/s. The vehicle acceleration at 2 m/s².

The initial velocity of a car, u = 30 m/s

The final velocity of the car, v = 10 m/s

Time, t = 10 s

To find,

The rate of change of the car's velocity determines the acceleration. The formula provides it as follows:

a=v-u/t

a=10-30/10

a=-2 m/s²

As a result, the car's acceleration is 2 m/s².

The rate of change in an object's velocity with respect to time is known as acceleration in mechanics. In vector quantities, accelerations exist (in that they have magnitude and direction). The direction of the net force that is acting on an object determines its acceleration. According to Newton's Second Law, the magnitude of an object's acceleration is the combined result of two causes: the net balance of all external forces acting on that object — magnitude is directly proportional to this net resulting force — and that object's mass, depending on the materials out of which it is made — magnitude is inversely proportional to this object's mass. The meter per second squared (m/s2) unit of acceleration in the SI system.

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The closest you can be to speaker B and be at a point of perfectly destructive interference- 1.008m.

The wavelength of sound emitted by speakers

= velocity / frequency

= 344 / 172

= 2 m

For destructive interference , path difference is equal to odd multiple of  half the wavelength .

path difference = 2 / 2 = 1 m

d₂ - d₁ = 1 m

d₂ = d₁ + 1 m

d₂ = .008 m + 1

 d₂ = 1.008 m

So, the closest you can be to speaker B and be at a point of perfectly destructive interference- 1.008m.

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The complete question is:

Two loudspeakers, A and B, are driven by the same amplifier and emit sinusoidal waves in phase. The frequency of the waves emitted by each speaker is 172 HzHz. You are 8.00 mm from speaker A. Take the speed of sound in air to be 344 m/sm/s. What is the closest you can be to speaker B and be at a point of perfectly destructive interference?

The tertiary consumers obtain 36 joules of energy if the primary customers use 3600 joules.

Energy, radiant energy, energy source, nuclear energy, electric power, motion energy, energy, elastic energy, and gravitational energy are among the several types of energy.

Modern medical technology, transportation, communications, computers, and numerous other items are all driven by energy. Particularly urgent is the need for affordable, reliable energy in rising economies. It might even save a person's life.

Consequently, if the main consumers use 3600 joule of energy,

the tertiary customers get

                      =3600×10%×10% joules

                      = 36 joules.

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Answer:

The battery is connected to a series-parallel combinationof capacitors.The two rightmost paralle

Answer:

Explanation:

position:  m

velocity:  m/s

acceleration:  m/s²

In the Doppler effect, the important things to distinguish between are frequency and velocity (speed).]

Doppler effect is the frequency change of a wave in relation to an observer that is moving relative to the source of the wave. It happens because when the source of the waves is moving towards the observer, each wave crest is emitted in a closer position to the observer than the previous wave. That makes each wave takes less time to reach the observer compared to the previous wave, causing an increase in frequency.

Since the Doppler effect is all about frequency change and a moving object is involved in it, it's important to distinguish between wave frequency and the speed the object is moving in.

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Researchers must employ a correlational design to ascertain the causes of the relationships between the variables.

Finding correlations between variables and enabling the forecasting of future events from the past are the goals of correlational research. If there is a correlation between two variables, it may be that one of them is a cause and the other an effect. But it's impossible to determine which is which because to the correlational research methodology. Researchers don't draw causal conclusions from correlational studies in order to be safe. Without changing an independent variable, correlational research entails measuring two variables and analyzing their connection. A correlation does not prove a cause. A research design known as a correlational study examines the connections between two or more variables.

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When measured in a laboratory frame of reference, the momentum more than doubles to that of the muon.

Compared to the electron, muons are 200 times heavier. They are intriguing because of their higher mass, but they are also unstable because of it. While muons only last for two microseconds, or two millionths of a second, before decaying, electrons persist for an infinite amount of time.

Nuclear power reactors with damage can be seen inside using muon technology. In order to look into big, thick monuments like the Egyptian pyramids, scientists employ muons in their archeological research.

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Proper order is 1) action potential reaches the synaptic knob, 2) voltage gated calcium channels open, 3) calcium enters the synaptic knob, 4) calcium trigger exocytosis of vesicles, 5) neurotransmitter diffusion across synaptic cleft 6) neurotransmitter binds to postsynaptic receptors.

The "pressure" that drives electricity is known as voltage. Higher voltages cause more electricity to flow to an electronic equipment. The voltage is measured in units called volts (V), and it is symbolized by this unit. The circuitry in electronic devices can be harmed by high voltages because they are made to function at specified voltages.

In contrast, a voltage that is too low can also lead to problems since it disables circuits and renders the devices that are constructed around them inoperable. In order to manage electronic devices properly and locate the root causes of troubles when they arise, one needs to have a basic understanding of voltage and how to resolve related problems.

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It is calculated that each person required 656.91 J of metabolic energy to finish the course.

When electrons transfer by one atom to the next, energy is produced. Energy can also take the form of heat or light. It is also possible to convert one type of energy into another. Potential energy that has been stored converts to electric energy using a battery.

The following formula is used to determine Jessie and Jaime's kinetic energy:

K.E = ¹/₂mv²

where;

m is mass of Jaime

v is speed

15 km/h = 4.17 m/s

4 km/h = 1.39 m/s

K.E = ¹/₂(68)(4.17)² + ¹/₂(68)(1.39)²

K.E = 656.91 J

Thus, it is calculated that each person required 656.91 J of metabolic energy to finish the course.

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The complete question is-

Jessie and Jaime complete a 4.0 km race. Each has a mass of 68 kg. Jessie runs the race at 15 km/h; Jaime walks it at 5 km/h. How much metabolic energy does each use to complete the course.

Brad must have exerted a power of 749.4 Watts.

The power is a measure of the rate at which work is done (or similarly, at which energy is transferred). The standard unit of power is Watt (W).

The power is determined by  the change in energy, which is the time taken in seconds.

According this it follows that one watt is equal to one joule of work done per second.

Power can also be mathematically represented as;

P = mgh/t

or P = Fd/t

where F = W = 637N

d = 400 meters

t = 340 seconds

P = (637 x 400) / 340

P = 749.4 Watts.

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The energy of one photon of x-ray radiation with a wavelength of 0.120 nm is 1.65 × 10⁻¹⁵ Joule.

The energy that a single photon carries is known as photon energy. Energy is inversely correlated with wavelength because it is directly proportional to the electromagnetic frequency of the photon.

Given that wavelength of photon is 0.120 nm.

Then, energy of photon is= hc/λ

= (6.6×10⁻³⁴×3×10⁸)/(0.120×10⁻⁹ Joule.

= 1.65 × 10⁻¹⁵ Joule.

Hence, the energy of photon is 1.65 × 10⁻¹⁵ Joule.

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Carbohydrates are the nutrition that matters most during endurance activity. Your muscles and liver both contain glycogen, which is the body's preferred form of energy storage. These stockpiles run low and exhaustion comes in when you exercise for more than 90 minutes.

What kinds of energy are required by endurance athletes?

For endurance sports, carbohydrates are frequently the preferred fuel source, so they take center stage in many athletes' nutrition programs. An additional source of carbohydrates is typically necessary to maintain peak performance because the body burns through its glycogen reserves, even at a pace below maximum

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The final speed of cars, when the collide and stick together, will be 1.1m/s

Linear momentum is the vector quantity and it happens when a particle moves with some velocity.

Thus, linear momentum = mass × velocity.

For an isolated system, the system's total momentum will remain unchanged.

The expression for the initial momentum is given by

p1=mv1+mv2

here, p is the total initial momentum of the system

it is given that both cars stick together after the collision, so the final velocity of each car will be the same

The expression for the final momentum is given b

pf=mv+mv

So, equating total initial and final momentum

pi=pf

v1+mv2=mv+mv

v=v1+v2/2

Substitute,

v=2.2m/s+0/2

v=1.1m/s

Thus, the final speed of each car is 1.1.m/s

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A star's color mostly indicates its surface temperature. However, it could also be used to estimate the age of the star.

There are several types of stars according to their colors which include the following;

The O-class stars are often blue in color and they are the hottest while the M-class stars are red in color and their temperatures are very low compared to the others, making them the coldest type of stars.

The color of the star is not a major factor in the estimation of the age of the star though it could be used sometimes.

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The Moment of inertia is increased by the factor of 3.

K = ½ (m1r12 + m2r22 + …)Ω2 = ½ (∑miri2)Ω2

The moment of inertia of the wheel is given as

I = MR2

if M' = 2M and R' = 1.5R

then I' = M'R'2 = (2M)(1.5R)2 = 3.0 MR2 = 3I

so the factor is 3

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The work done by the electric field when the particle has moved through a distance of 2.15 cm from its initial position is 0.04515 J.

The work done by a force is defined to be the product of the component of the force in the direction of the displacement and the magnitude of this displacement.

A force must be applied in order for work to be completed, and there must also be motion or displacement in the force's direction.

The amount of force multiplied by the distance moved in the force's direction is known as the work done by a force acting on an item. Work has no direction and only magnitude. Work is a scalar quantity.

As the given charge is positive so the force on the positive charge is in the direction of electric field according to the relation,

F = q×E (in vector form)

So, force on charge is in z direction.

Force on charge = qE

                          = 10*10-3*210 N

                          = 2.1 N

Work done = F.s

                 = 2.1*2.15*10^-2 J

                 = 0.04515 J

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Since it detects emissions from fires, the flame emission detector in the example is not a radioactive detector.

Which three main categories of radiation detectors are there?

Radiation detectors come in three primary categories. These include semiconductor detectors, gas ionization detectors, and detectors based on scintillation. The ionization chamber, proportional counter, and Geiger-Müller counter are gas ionization-based detectors.

Is Geiger radioactive in reverse?

A low pressure gas is kept in a copper cylinder in an early Geiger counter type while an electrical current passes through it. When a radioactive particle enters a cylinder, an electric current surge occurs, which is recorded on a counter.

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Radio waves have the electromagnetic spectrum's longest wavelengths. Radio waves have wavelengths that are longer than one millimeter.

A waveform signal that is propagated in space or along a wire has a wavelength, which is the separation between two identical points (adjacent crests) in the adjacent cycles.

The electromagnetic spectrum's longest wavelengths, which are found in radio waves, are normally found at frequencies of 300 gigahertz and below. The wavelength for 300 GHz is 1 mm, while the wavelength for 30 Hz is 10,000 kilometers.

So,

Radio waves have the electromagnetic spectrum's longest wavelengths. Radio waves have wavelengths that are longer than one millimeter.

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Based on the Second Law of Newton, a car traveling along a highway needs more amount of topping force exerted on it to stop when the car has less stopping distance, more momentum, and more mass (D).

Based on the Second Law of Newton, we know that the acceleration of an object is dependent to its resultant force and mass. The second law of Newton could be formulized as:

∑F = m.a

where:

F = the resultant force

m = the object's mass

a = the object acceleration

On the case, we know that a car is traveling along a highway. The car's stopping force will be dependent on the car's mass and its acceleration.

Let's dig deeper on acceleration part.

As we know, based on the linear motion concept, there are some equations to describe relationship between velocity, acceleration, distance, and time. Those equaations are:

v = u + at

s = ut + 1/2 at²

s = 1/2 (u+v)t

v² = u² + 2as

s = vt - 1/2 at²

where:

v = final velocity

u = tnitial velocity

a = acceleration

t = time

s = distance

If we subtitute one of acceleration equation to the second law of Newton, we will get:

F = m.a

v = u + at

a = (v-u)/t

F = m.(v-u)/t

F = mv - mu

           t

Based on the momentum concept, we know that momentum is the result of multiplication between an object's mass and velocity. Hence the sopping force is also affected by the momentum of an object.

If we subtitute another acceleration equation, we will find another equation:

F = m.a

s = ut +1/2at²

a = 2(ut-s)

         t²

F = m[2(ut-s)/t²]

This equation shows that the stopping force will also be affected by the distance of an object betweenn its initial position to its final position.

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Yes, (-)menthol and (+) menthol will have an α of the different magnitudes

What is menthol?

Menthol is an organic compound, more specifically a monoterpenoid, synthesized or extracted from the oil of field mint, peppermint, or other mints.It is a waxy, clear or white, crystalline substance that is solid at room temperature, Melt slightly on top.

The major natural form of menthol is (-)-menthol, which is assigned the (1R,2S,5R) configuration. Menthol has local anesthetic and anti-irritant properties and is commonly used to soothe minor irritations in the throat. Menthol also acts as a weak kappa opioid receptor agonist. The (+) and (-) enantiomers of menthol are the most stable of these due to their cyclohexane conformation. All three bulky groups can be placed at the equator if the ring itself is in the chair conformation.

Yes, (-)menthol and (+) menthol will have an α of the different magnitudes

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The amount of heat that needs to be removed from 100 g of 85°c water to make -5°c ice is 70194 J of heat.

The amount of heat that needs to be removed is calculated below.

Heat changes involved are as follows:

Heat change from water at  85°C to water at 0°C = mc₁ΔT₁

Heat change from water at  0°C to ice at 0°C = mL

Heat change from ice at 0°C to ice at -5°C = mc₂ΔT₂

where

m is mass = 100 g

c₁ is the specific heat capacity of water = 4.184 J/g/K

ΔT₁ is temperature change = 85°C

L is the latent heat of fusion of ice = 336 J/g

c₂ is the specific heat capacity of ice = 2.06 J/g/K

ΔT₁ is temperature change = 5°C

Heat change = (100 * 85 * 4.184) + (100 * 336) + (100 * 5 * 2.06)

Heat change = 70194 J

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If I drop the sand bag out of the cart right at the equilibrium location, my oscillation amplitude b)will decrease, So, correct option is b.

On the off chance that it is situated toward the end, its dynamic energy will be equivalent to nothing, so the framework all in all would just have expected energy, which is characterized as:

[tex]E_p[/tex] = (1/2) × k ×A²

Where Aₙ is the sufficiency of the swaying.

As per the energy guideline, said energy should stay preserved, subsequently, the complete energy is equivalent to:

[tex]E_t_o_t_a_l[/tex] = (1/2) × k ×A²

Since the framework is in balance, as per the declaration of preservation of energy, the energy in the position situated toward the end would be equivalent to the energy in harmony. As the barricade falls, its dynamic energy diminishes, which is the reason the all out energy of the framework likewise diminishes.

Hence, correct option is b.

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(Complete question) is:

If you drop the sand bag out of the cart right at the equilibrium location, what effect will that have on the amplitude of your oscillation?

a)will increase

b)will decrease

c)will remain same

At the bottom of the journey, the passengers will be travelling at a speed of approximately 39.2 m/s.

Acceleration is the rate of change of an object's velocity over time. It is a vector quantity, meaning it has both magnitude and direction. Acceleration is usually denoted by the letter a in equations. It is the second derivative of position with respect to time, or the rate of change of velocity. Acceleration describes how quickly an object's speed changes with time. Acceleration can involve either an increase or decrease in speed, and it can involve either a change in direction or no change in direction.

This is because the velocity of a free falling object is equal to the square root of two times the acceleration of gravity times the height from which the object is dropped.
In this case, the height is 33.5 m, and the acceleration of gravity is 9.8 m/s2.
Therefore, the velocity at the bottom of the journey is equal to the square root of two times 9.8 m/s2 times 33.5 m, which is equal to 39.2 m/s.

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When a 0.5 kilogramme hockey puck hurtles at the goaltender, its acceleration in the glove is 800 m/s2. F=ma a=F/m a=400/0.5 a=800 m/s2.

Acceleration refers to any process where velocity varies. There are only two ways to accelerate: either by speeding up your acceleration or by reversing your acceleration. Because velocity consists of both a speed and a direction, this is the case. You cannot possibly be accelerating if you don't also alter your direction and speed, regardless of how swiftly you are travelling. As a result, a jet does not suffer acceleration even while moving at a high speed—in this example, 800 miles per hour—because its velocity is constant.

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a)The 5.00 of peanut has 5.73 Kcal/g of energy.

b)On comparing our answer to the label on package of peanut , it is found that the values are approximately same, the variation is due to the quality of peanuts.

a)

Given,

mass of peanut = 5.00 g

mass of water = 0.500 kg

mass of aluminium cup = 0.100 kg

temperature change = [tex]54.9 \textdegree C[/tex]

it is given that the heat from burning peanut is transferred to water and aluminium cup then,

the heat gained by water is [tex]Q_w=m_wC_w \Delta T[/tex]

Where,

[tex]m_w[/tex]= mass of water

[tex]C_w[/tex]= specific heat of water i.e.4184 J/kg°C

[tex]\Delta T[/tex]= change in temperature

[tex]Q_w[/tex][tex]=0.5*4184*54.9=1.15*10^5 J[/tex]

Now, the heat gained by aluminum cup is[tex]Q_{Al}=m_{Al}C_{Al} \Delta T[/tex]

Where,

[tex]m_{Al}[/tex]= mass of aluminium cup

[tex]C_w[/tex]= specific heat of water i.e.900J/kg°C

[tex]\Delta T[/tex]= change in temperature

[tex]Q_{Al}=0.1*900*54.9=4.94*10^3J[/tex]

then , the total heat gained by water and aluminium cup is

[tex]Q_T=(1.15*10^5)+(4.94*10^3)=1.20*10^5 J[/tex]

So,[tex]Q_T[/tex] is the heat transferred by burning of peanut to water and cup then the amount of heat for peanut will be same as [tex]Q_T[/tex],

[tex]Q_T=Q_{peanut}=1.20*10^5 J=\frac{1.20*10^5}{4184}=28.6 Kcal[/tex]

So, 5.00 g for peanut has 28.6 Kcal of energy then 1 g of peanut has [tex]\frac{28.6}{5}=5.73 Kcal.[/tex]

Hence, the 5.00 of peanuts have 5.73 Kcal/g of energy

b)

When we compare our answer to the label on the peanut package, we discover that the values are nearly identical; the difference is due to the quality of the peanuts.

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The new oscillation frequency is 1.07 rad/sec when the pendulum is rehanged to the rod halfway between the old pivot point and the middle of the rod.

The period of oscillation is the shortest amount of time after which the motion of the particle repeats. The period of oscillation is the length of time it takes for a particle to complete its to-and-fro motion.

A body suspended from a fixed point so that it can move back and forth while being pulled by gravity is called a pendulum. A pendulum's whole back-and-forth oscillation has a consistent time interval.

Calculations:

Period of pendulum T = 2 × √I/mgd

Where,

I = moment of inertia

L = length of the pendulum

m = mass

d = distance or L/2

g = acceleration due to gravity.

When pivoted at one end = I = 1/3mL²

When pivoted at other end = f = 1/2π × √mgd/I

f= 1/2π × √(mgL/2)/(1/3 mL²)

f= 1/2π × √ (3g)/(2L) -------------------- (i)

Now when pivoted mid way

I' = mL²/12 + m (L/4)²

I' = mL²/12 + m L²/16

I' = 7mL²/48

Thus here d= L/4

f' = 1/2π × √(mgL/4)/(7/48mL²)

1/2π × √(12g/7L) ----------------------(ii)

Then, f'/I = {1/2π × √(12g/7L)}/{1/2π × √ (3g)/(2L)}

= √ 1.14

~ 1.07 rad/sec.

Hence, the new oscillation frequency is 1.07 rad/sec when the pendulum is rehanged to the rod halfway between the old pivot point and the middle of the rod.

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The length of the effort arm of a lever divided by the length of the resistance arm represents the optimal mechanical advantage.

effort force = 445/9.5

= 46.84

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Answer:

DDDDDDDDDDDDDDDDDDDDDDDDDDD

When bucket is originally empty, then the scale reads after water starts to accumulate in it is T = 18.97 N.

The net force is defined as the vector sum of forces acting on a particle or object. The net force is a single force that replaces the effect of the original forces on the motion of particle.

After 3.50 seconds, bucket contains 0.91 L of water, which has mass of 0.760 kg same as the bucket. The total mass m of the bucket and the water is 0.91 + 0.760 = 1.67 kg.

So, the gravitational force F,

As, F = mg = (1.67)(9.81) = 16.738N

There is an additional downward force resulting from the momentum of the water being poured and every second, there is 0.260 L = 0.260 kg of water hitting the bottom of the bucket.

Since water falls without splashing, this implies  means we can neglect the height of the water that is already in the bucket, and just say that it has fallen full distance of x = 3.80 m.

After falling that distance, water will reach a velocity of sqrt(2gx) = 8.63 m/s

So, force W will be the change of momentum over time,

We know, W = mv/t

= (0.260 kg) (8.63 m/s) / 1 s

= 2.24 N

Total force, T = F + W

= 16.738 + 2.24

T = 18.97 N

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