what is the alkalinity of exhibit water in mg/l caco3 if a 25 ml sample required 10.66 ml of 0.015 m hydrochloric acid titrant to reach the endpoint

Answer:

highest at top

f=b

e=a=d

c

Explanation:

It is impossible to for a heat engine to be 100 % efficient because  

The basic principle behind a heat engine is to convert thermal energy (heat) into useful work. A heat engine works by absorbing heat from a high temperature source and converting it into work, and then rejecting the remaining heat to a low temperature sink. The efficiency of a heat engine is defined as the ratio of the work output to the heat input.

However, it is impossible for a heat engine to be 100% efficient because some heat is always lost to the environment. This lost heat is due to various factors such as friction, thermal conduction, and other sources of inefficiency within the heat engine.

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Answer:

Copper isn't ferromagnetic,

Aluminum isn't ferromagnetic,

String has a ferromagnetic property

So in conclusion:

The answer is strings :)

To find the image distance formed by a concave mirror, we can use the mirror equation:

1/f = 1/di + 1/do

Where:

f is the focal length of the mirror,

di is the image distance,

and do is the object distance.

In this case, the object distance (do) is given as 12.0 cm, and the focal length (f) is given as 15.0 cm. We can rearrange the equation to solve for the image distance (di):

1/di = 1/f - 1/do

Substituting the given values:

1/di = 1/15 - 1/12

To simplify this expression, we need to find a common denominator:

1/di = (12 - 15)/(12 * 15)

1/di = -3/180

Now, we can invert both sides to find di:

di = 180/-3

di = -60 cm

Therefore, the image distance is -60 cm. The negative sign indicates that the image is formed on the same side as the object (in this case, it is a virtual image).

Answer:

60 cm

Explanation:

the U (obj. distance)  =   12  as it is a concave mirror then u  =  -12cm

the f = -15cm

by mirror formula

1/v  +  1/u =  1/f

by substituting values

1/v  +  (1/-12)  =  1/-15

1/v = 1/-15 -(1/-12)

1/v = 1/-15 + 1/12

by taking L C M  60

1/v = -(4/60)  +  5/60

1/v = 1/60

so V = 60 cm

Answer:

Explanation:

Michael Faraday discovered this during one of his experiments. He found that a change in the magnetic flux of one object induced an electric current in another. This fact was found experimentally, and not theoretically. Faraday found this by holding a compass up to a coil. When the magnetic field was changed, the compass needle sharply moved to the left or right depending on the direction of the current in the coil. This showed that a changing magnetic field, induces an electric current in the needle.

The idea of an electric current producing a magnetic field is proven in multiple different ways. Magnetism is due to charges in motion, which current is defined as the movement of charges over time. So, it only makes sense that a current produces a magnetic field. We can experimentally prove this by running a current through a solenoidal coil. The current inside the coil will produce a magnetic field. We can see the magnetic field by pouring iron filings onto the coil. A large majority of the iron pieces will be attracted to the coil, which is where the magnetic field is theoretically thought to be.

Answer:

read explanation

Explanation:

Due to this reason a gas (air) a conductor of electricity at low pressure. ... It is because when the gas is at very low pressure positive charged ions are not available to eject out the electron from the cathode hence the discharge current stops.No, vacuum cannot conduct electricity.

Answer:

b. between 2 s and 4 s

Explanation:

2-4 was both 3m/s

Answer:

velocity is the rate of change of distance moved with a time in a specific direction. While speed is the rate if distance with time in no specific direction

Answer:

The resultant velocity is 86.1 mi/h.    

Explanation:

The law of cosines is given by:

\( c^{2} = a^{2} + b^{2} - 2abcos(\theta) \)

Where:

c: is the resultant velocity =?

a: is the velocity of the plane = 75.0 mi/h

b: is the velocity of the wind = 15.0 mi/h  

θ: is the angle between "a" and "b"                          

The angle between "a" and "b" can be found as follows:

\( \theta = 180.0 - 46.0 = 134.0 ^{\circ} \)

Now, by using the law of cosines we have:

\( c^{2} = (75.0)^{2} + (15.0)^{2} - 2*75.0*15.0*cos(134.0) = 7413.0 \)

\( c = 86.1 mi/h \)    

Therefore, the resultant velocity is 86.1 mi/h.    

The law of sines is:

\( \frac{a}{sin(\gamma)} = \frac{b}{sin(\alpha)} = \frac{c}{sin(\theta)} \)

Where:

γ: is the angle between "b" and "c"

α: is the angle between "a" and "c"

So, if we want to find "c" by using the law of sines, we need to know another angle besides θ (γ or α), and the statement does not give us.

I hope it helps you!        

The magnitude of the average induced emf in volts opposing the decrease of the current depends on the rate of change of magnetic flux and the number of turns in the coil. To calculate the emf, we need more information.

To answer your question, we need to understand a few concepts related to electromagnetic induction. Whenever there is a change in magnetic flux linked with a conductor, an emf is induced in the conductor. This emf opposes the change in magnetic flux according to Faraday's law of induction. The magnitude of this emf can be calculated using the formula E = -N*dΦ/dt, where E is the induced emf, N is the number of turns in the coil, and dΦ/dt is the rate of change of magnetic flux.
In your question, you have mentioned that the induced emf is opposing the decrease of the current. This suggests that there is a change in the magnetic field that is causing the current to decrease. To calculate the magnitude of the induced emf, we need to know the rate of change of magnetic flux and the number of turns in the coil. Without this information, it is not possible to give a specific answer.

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The wavelength, photoperiod, and intensity of solar radiation all have significant impacts on the environment and living organisms, affecting various biological processes, behaviors, and ecological patterns.

The wavelength, photoperiod, and intensity of solar radiation that falls in a given area in a unit of time will influence various factors.

Firstly, the wavelength of solar radiation determines the color and energy of the light. Different wavelengths have different effects on the environment and living organisms. For example, shorter wavelengths such as ultraviolet (UV) radiation can cause sunburns and damage DNA, while longer wavelengths such as infrared (IR) radiation produce heat.

Secondly, the photoperiod, which refers to the duration of daylight in a day, affects the growth and development of plants, animals, and other organisms. Photoperiod influences processes like flowering, migration, and hibernation. Changes in photoperiod can trigger specific biological responses in organisms, regulating their life cycles and behaviors.

Lastly, the intensity of solar radiation refers to the amount of energy received per unit area in a given time. Higher intensity levels provide more energy, which can affect photosynthesis, temperature regulation, and metabolic activities. Intensity variations also influence the distribution and abundance of species in an ecosystem, as organisms adapt to different energy levels.

In conclusion, the wavelength, photoperiod, and intensity of solar radiation all have significant impacts on the environment and living organisms, affecting various biological processes, behaviors, and ecological patterns.

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The resistance of the wire with a diameter of 4.3 mm and a length of 8.1 m is 9.14*10⁻³ Ω

Resistance is defined as a refusal to give up to something that prevents or slows down anything. A child fighting her abductor is an example of resistance. An example of resistance is the wind pushing up against an airplane's wings.

We can calculate the resistance as follows:

R = 1/σ . L / A, where:

l is the wire's length, σ is the electrical conductivity, and A is its cross-section (assumed circular).

By modifying the values, we may determine R as follows:

R = 1/6.1. 10⁷ (Ω.m) . 8.1 m. / π (0.0043)² m / 4

= 9.14 . 10⁻³ Ω

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The complete question is-

For a metal that has an electrical conductivity of 6.1 × 10⁷ (Ω∙m)⁻¹, what is the resistance of a wire that is 4.3 mm in diameter and 8.1 m long?

(A) 3.93 × 10⁻⁵ Ω

(B) 2.29 × 10⁻³ Ω

(C) 9.14 × 10⁻³ Ω

(D) 1.46 × 10¹¹ Ω

Answer:

30.5mm

Explanation:

There are 300 pages, so to find the number of pages we do 0.1mm*300 to get 30mm. There are two covers in the book (the front and the back). 0.25mm*2 = 0.5mm. To determine the total thickness of the book we do 30mm+0.5mm to get a total of 30.5mm

Your answer is 30.5mm.

Answer:

15.5mm

Explanation:

there are 150 pages(one page has 2 sides so 300/2 = 150) and 2 covers

page's thickness is 0.1mm, cover's thickness is 0.25

so books thickness = 150*0.1+0.25*2 = 15.5mm

Answer:

gravitational potantional energy

Explanation:

ill try to link a source!

edit: https://flexbooks.ck12.org/cbook/ck-12-middle-school-physical-science-flexbook-2.0/section/14.3/primary/lesson/potential-energy-ms-ps#:~:text=Potential%20energy%20due%20to%20the,is%20called%20gravitational%20potential%20energy.

Answer:

Time, t = 10 seconds

Explanation:

Given the following data;

Mass = 10kg

Force = 10N

Final velocity = 10m/s

Initial velocity = 0m/s

To find the time;

First of all, we would find the acceleration of the box.

Force = mass * acceleration

10 = 10 * acceleration

Acceleration = 10/10 = 1m/s²

Now, we can find the time by using the first equation of motion;

V = U + at

10 = 0 + 1t

10 = t

Time, t = 10 seconds

Therefore, it will take 10 seconds for the box to come to a complete stop.

Answer: It’s A

Explanation:

Answer:

A trees food and air source would be deprived because of this. Trees need leaves to perform photosynthesis, so besides their roots soaking up water and nutrients, they wouldn't have any other form of food until those leaves grow back. If they don't and the locusts continue to eat up the tree, it will eventually starve and die.

Explanation:

Imagine the trees trunk and roots as your body and the leaves as your mouth/food source. God Forbid you catch a cold or some sickness. You probably won't have the appetite to eat. Despite that, you'll still have to. But, if you get so sick to the point that eating just makes you throw it up before your body can take in the nutrients and beneficial stuff, you will eventually get to the point where eating is nearly impossible. This will lead up to the sickness taking over your body, as there's no energy going in to help it fight it off, and you would die.

(Gah, sorry for the dark theme... didn't think it would turn like that lol)

Anyways, hope this helped!

Source(s) used: N/A

Answer:

This occurs because Earth's axis tilts the Southern Hemisphere toward the Sun, reducing the effects of day and night from Earth's rotation.

Earth's axis tilts the Southern Hemisphere toward the Sun, reducing the effects of day and night from Earth's rotation. The correct option is C.

Due to the tilt of the Earth's axis, the South Pole occasionally receives nonstop sunlight and 24-hour days. The tilt of the Earth's axis is a function of how the planet orbits the sun. Due to this tilt, the Earth's surface receives varied amounts of sunlight throughout the year.

The South Pole has 24 hours of uninterrupted sunlight when the Southern Hemisphere is angled toward the Sun, as it is at the summer solstice. This is because the axial tilt causes the Sun to always be above the horizon in that area.

Therefore, The correct option is C.

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Answer:

d= 45 m

Explanation:

speed = distance / time

15= d/ 3

d= 45 m

For the cassette player, the ratio of intensities of signal and noise is approximately 1.6 x 10^6, while for the CD player, it is about 6.3 x 10^9.

Signal-to-noise ratio (SNR) is a measure of the relative amount of desired signal and unwanted background noise in a system. It is usually expressed in decibels (dB). The higher the SNR, the better the quality of the signal.

To calculate the ratio of intensities of signal and noise for each device, we first need to convert the SNR from decibels to a ratio. This can be done using the following formula:

SNR (in dB) = 10 log (signal-to-noise ratio)

Using this formula, we get:

For the cassette player:

62 dB = 10 log (signal-to-noise ratio)

Signal-to-noise ratio = 10^(62/10) = 1.6 x 10^6

For the CD player:

98 dB = 10 log (signal-to-noise ratio)

Signal-to-noise ratio = 10^(98/10) = 6.3 x 10^9

The ratio of intensities of signal and noise is simply the signal-to-noise ratio expressed as a ratio, rather than in decibels. Therefore, the ratio of intensities for the cassette player is approximately 1.6 x 10^6, while for the CD player, it is about 6.3 x 10^9. This means that the CD player has a much higher ratio of signal to noise, which results in a better quality sound compared to the cassette player.

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To freeze the liquid, the amount of heat that needs to be removed is determined by multiplying the mass of the liquid by the heat of fusion (Lf).

To boil the liquid, the amount of heat that needs to be added is determined by multiplying the mass of the liquid by the heat of vaporization (Lv).

The amount of heat required to freeze or boil a substance can be calculated using the formulas Q = m * Lf and Q = m * Lv, respectively. In these formulas, Q represents the amount of heat, m represents the mass of the substance, Lf represents the heat of fusion, and Lv represents the heat of vaporization. By substituting the given values of Lf and Lv, and knowing the mass of the liquid, one can calculate the required amount of heat for freezing or boiling the liquid.

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Answer:

A. wind blows from the land toward the sea.

B. that this happens because the land cools faster than the sea, and, as a result, the air over land cools faster, which creates an area of higher pressure on land and lower pressure over the sea.

Explanation:

bc I am smrt

PLZ thank five star

and brainliest would be appreciated:-)

Answer:

5 m/s²

Explanation:

Use the acceleration formula: \(a=\frac{v_f-v_i}{t}\)

Based on the information given to us by the prompt, we know:

Substitute these values for the variables to calculate the acceleration:

\(a=\frac{30-10}{4}\\\\a=\frac{20}{4}\\\\a=5\)

Therefore, the acceleration of the bus is 5 m/s².

The moment of inertia of the system  for the three situations are 0.026667 kg m2,0.04 kg m2,0.013333 kg .

Four small spheres, each of which you can regard as a point of mass 0.200 kg, are arranged in a square 0.400 m on a side and connected by light rods

a) The moment of inertia of the system about an axis

through the center of the square,

perpendicular to its plane (an axis through point O) is equal to

4 x 0.200 kg x (0.400 m)2/12

= 0.026667 kg m2.

b) The moment of inertia of the system about an axis

bisecting two opposite sides of the square (an axis along the line AB) is equal to

4 x 0.200 kg x (0.400 m)2/8

= 0.04 kg m2.

c) The moment of inertia of the system about an axis

that passes through the centers of the upper left and lower right spheres and

through point O is equal to

2 x 0.200 kg x (0.400 m)2/12

= 0.013333 kg m2.

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The ranking  in order from largest to smallest of the magnitudes of the horizontal forces f1 , f2 , and f3 acting on the arrows is F1=F2=F3>0 because there is no change in the horizontal motion of the arrows.

All three arrows in the scenario have been shot and it is assumed that air resistance can be neglected. With the motion of the arrows in horizontal direction, there is no likely change in the horizontal motion of the three arrows. This makes the three forces equivalent to one another and each force is equal to zero (i.e. F1=F2=F3=0).

Here's the complete question:

Rank in order, from largest to smallest, the magnitudes of the horizontal forces F1, F2, and F3 acting on the arrows. Some may be equal. State your reasoning. Rank in order, from largest to smallest, the magnitudes of the horizontal forces , , and acting on the arrows. Some may be equal. State your reasoning.

a. F3>F1=F2 because the mass of the first arrow is equal to the mass of the second arrow which is less than the mass of the third arrow.

b. F1=F2=F3=0 because there is no change in the horizontal motion of the arrows.

c. F1>F2=F3 because the velocity of the second arrow is equal to the velocity of the third arrow which is less than the velocity of the first arrow.

d. F1=F2=F3>0 because there is no change in the horizontal motion of the arrows.

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Known :

m = 2.36 × 10⁴ kg

M = 9.4 × 10³ kg

V = 2.7 m/s

Solution :

Using the principle of momentum

m • v = (m + M) • V

(2.36 × 10⁴) • v = (2.36 × 10⁴ + 9.4 × 10³)(2.7)

v = 3.77 m/s

Answer:

The water makes a cloud when the warm moist air meets the colder air. This demonstrates the formation of what we know as "clouds". Then precipitation happens when the clouds gets to full of water droplets. Finally, accumulation happens when the water forms puddles and goes back to the lakes and streams.

Explanation:

It"s B i think i've might be wrong??

Answer:

A machine consumes energy whereas an engine produces energy. Engine converts heat energy to Mechanical Energy but machine converts all forms of energy to mechanical energy except heat energy. A engine runs a machine,without a engine a machine can't run.

Explanation:

I hope this helps! :) If it does could you please mark me brainliest?