5. in a tlc experiment, why should the spot not be immersed in the solvent in the developing chamber?

The battery in an electric circuit provides electricity to the rest of the circuit using electrical energy. Also changes the form of the electrical energy.

Energy is defined as the capacity of a physical system to perform work. The ability of an atom's charged particles to initiate an activity or move an object is known as electrical energy. Electrical energy is produced by the transfer of electrons between atoms.

An electro-chemical device known as a battery energy storage system  charges energy from the grid or a power plant and then discharges that energy later to produce electricity or other grid services as needed.

The battery in an electric circuit changes chemical energy into electrical energy and also provides electricity to the rest of the circuit.

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Answer:

do explain what u need help with?

Answer:

Verdadera.

Explanation:

La caloría se puede definir como una unidad estándar utilizada para medir la cantidad de energía presente en un organismo vivo.

Una caloría (cal) es la cantidad de transferencia de energía necesaria para elevar la temperatura de 1 g de agua de 14,5 °C a 15,5 °C.

Generalmente, es una unidad de medida de energía e igual a 4,1855 julios.

Answer:b

Explanation:

im in fifth grade so i guessd. gl tho heh.

The answer will be an option C. The momentum would be eliminated for the running back.

The collision in which the object bounces off after the collision is called the elastic collision. The one condition is given in the question that after the collision the running back bounces back and the linebacker stops

A linebacker runs at 3 m/s and collides with a running back running toward him at 3.2m/s. If the running back bounces back and the linebacker stops it means that the collision is elastic. And all the momentum is transferred to the other person.

Therefore the answer will be an option C. The momentum would be eliminated for the running back.

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Answer:

the reflection of the candle in the concave mirror formed upside down real image that is diminished

Answer:

If you mean for exercising  then, The Treadmill. Purists may claim that treadmill running isn't "real" running. ...

The Elliptical Trainer. ...

The Stair-Climber. ...

The Cross-Country Skiing Simulator. are all  machines that help you practice agility

Explanation:

Answer:answer it bro get smart

Explanation:

Answer:

to prevent the government from abusing people's rights

Explanation:

Bill of rights is made up of the first ten amendments to the United States Constitution.

The bill of right include Freedom of religion, speech, press, assembly and petition.

The Right to keep and bear arms in order to maintain a well regulated militia.

The Right to due process of law, freedom from self-incrimination, double jeopardy.

The purpose of this bill is to protect the rights of citizens against infringement from the government,public officials and private citizens.

The observed frequencies are a set of actual values that have been measured or observed in an experiment or study. A chi-square test is a statistical test used to determine whether there is a significant difference between the expected frequencies and the observed frequencies in a set of data.

In general, if the observed frequencies in a chi-square test are significantly different from the expected frequencies, then the null hypothesis (which states that there is no significant difference between the expected and observed frequencies) is rejected. The magnitude of the difference between the expected and observed frequencies, as well as the sample size, will determine the degree of significance of the test.

Therefore, it is important to have more context about the specific data and research question you are referring to in order to accurately describe the observed frequencies in a chi-square test.

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According to the elastic rebound theory, rocks do not constantly move in response to stress because their rough and irregular surfaces generate frictional resistance.

When stress is applied to rocks, they deform elastically, meaning they temporarily change shape without permanently displacing. As the stress continues to accumulate, the rocks reach their elastic limit, and the stored energy is suddenly released.

This release of energy causes the rocks to rapidly rebound back to their original shape, resulting in seismic waves and an earthquake.

The rough and irregular surfaces of the rocks create points of contact that resist movement and contribute to the buildup and eventual release of stress energy.

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The set of balloons would exhibit a greater electric force is given by the term F₂ > F₁.

Electric force is the attracting or repulsive interaction between any two charged things. Similar to any force, Newton's laws of motion define how it affects the target body and how it does so. One of the many forces that affect things is the electric force.

To study the motion caused by that sort of force or combination of forces, Newton's laws are relevant. The analysis starts with the creation of a free body picture, where the vector represents the individual forces' types and directions in order to compute their sum, known as the net force, which may be used to calculate the body's acceleration.

According to the Coulomb's law,

Force(f) = \(\frac{kq_1q_2}{d^2}\)

F ∝ 1/d²

Clearly, if distance between charge increases force between them decreases and vice-versa

Clearly, below figure exhibit greatest force

F₂ > F₁.

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The menstrual cycle is the monthly series of changes a woman's body goes through in preparation for the possibility of pregnancy. Each month, one of the ovaries releases an egg — a process called ovulation.

At the same time, hormonal changes prepare the uterus for pregnancy. If ovulation takes place and the egg isn't fertilized, the lining of the uterus sheds through the vagina. This is a menstrual period.

The menstrual cycle, which is counted from the first day of one period to the first day of the next, isn't the same for every woman. Menstrual flow might occur every 21 to 35 days and last two to seven days.

For the first few years after menstruation begins, long cycles are common. However, menstrual cycles tend to shorten and become more regular as you age.

Therefore, The menstrual cycle is the monthly series of changes a woman's body goes through in preparation for the possibility of pregnancy. Each month, one of the ovaries releases an egg — a process called ovulation.

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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.

A short circuit results in an increase in current within the portion of the circuit with very low resistance.

In a short circuit, the low resistance path provides an easy and direct route for the current to flow without encountering significant resistance. This causes a large amount of current to flow through the low resistance path, which can lead to overheating and damage to the circuit components.

The increased current can also cause the protective devices, such as fuses or circuit breakers, to activate and interrupt the circuit. Therefore, it is important to identify and fix short circuits promptly to prevent damage to the circuit and ensure safety.

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The current sensitivity of the first coil is  0.5 times that of the second coil. The voltage sensitivity of the first coil is 2.5 times that of the second coil.

Current sensitivity can be determined as how much a galvanometer will deflect on flowing some current through it. Voltage sensitivity can be determined by how much the galvanometer will show deflection when a potential difference is developed across its ends.

Current sensitivity is directly proportional to the number of turns while voltage sensitivity is the ratio of the number of turns of the coil to the resistance.

The number of turns in the first coil, n₁ = 50

The number of turns in the second coil, n₂= 100

The current sensitivity:

\(\frac{CS_1}{CS_2}= \frac{50}{100}\)

C.S₁ = 0.5 C.S₂

The current sensitivity of the first coil is  0.5 times that of the second coil.

Given the resistance of the first coil = 10 ohm

The resistance of the second coil = 50 ohm

The voltage sensitivity of coils:

\(\frac{V.S_1}{V.S_2} =\frac{50/10}{100/50}\)

V.S₁ = 2.5 V.S₂

The voltage sensitivity of the first coil is 2.5 times that of the second coil.

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The recoil velocity of the cannon across the level ground is 0.94 m/s.

The rate at which a body's displacement changes in relation to time is known as its velocity. Velocity is a vector quantity with both magnitude and direction. SI unit of velocity is meter/second.

Mass of the cannon =  1500 kg

Mass of the shell = 10 kg

Velocity of the shell = 200 m/s

Hence, the recoil velocity of the canon is = (10 × 200)/1500 cos45 °m/s

= 0.94 m/s

Hence,  the recoil velocity of the cannon across the level ground. is 0.94 m/s.

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Answer:

Its C. The acceleration is constantly increasing

Answer:

It’s a the acceleration is constant

Explanation:

the two lowest frequencies at which dogs have an increase in sensitivity, assuming a speed of sound in the warm air of the ear as 350 m/s, are approximately 875 Hz and 1750 Hz.

Dogs have a higher sensitivity to sound compared to humans, especially in the lower frequency range. To determine the two lowest frequencies at which dogs have an increase in sensitivity, we need to consider the range of frequencies that dogs can hear and the speed of sound in the warm air of the ear.

The typical hearing range of dogs is approximately 40 Hz to 60,000 Hz, although this can vary among individual dogs. Dogs are particularly sensitive to lower frequencies, which is why they can often hear sounds that are inaudible to humans.

To calculate the two lowest frequencies at which dogs have an increase in sensitivity, we need to consider the speed of sound in the warm air of the ear, which is given as 350 m/s.

The formula to calculate the frequency (f) is:

f = v/λ

where v is the speed of sound and λ is the wavelength.

Since we want to determine the two lowest frequencies, we need to find the wavelengths corresponding to these frequencies.

The two lowest frequencies will occur when the wavelengths are at their maximum. The maximum wavelength occurs when the wavelength is twice the length of the dog's ear canal. The length of the ear canal in dogs varies, but for the purpose of this calculation, let's assume it to be approximately 20 cm or 0.2 m.

Using the formula λ = 2L, where L is the length of the ear canal, we can find the maximum wavelength:

λ_max = 2L = 2 × 0.2 = 0.4 m

Now we can calculate the two lowest frequencies using the formula:

f = v/λ

For the first lowest frequency, we divide the speed of sound by the maximum wavelength:

f1 = 350/0.4 = 875 Hz

For the second lowest frequency, we divide the speed of sound by half of the maximum wavelength:

f2 = 350/0.2 = 1750 Hz

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The conduction of current on the postsynaptic neuron in an electrical synapse occurs through direct flow of ions between the presynaptic and postsynaptic neurons.

In electrical synapses, the conduction of current on the postsynaptic neuron occurs through direct flow of ions between the presynaptic and postsynaptic neurons. These synapses are formed by specialized structures called gap junctions, which create channels between the cells, allowing ions to pass through. The channels are formed by connexin proteins that span the plasma membranes of adjacent neurons.

When an action potential reaches the presynaptic neuron, it depolarizes the cell membrane and triggers the opening of voltage-gated ion channels. This results in the influx of positively charged ions, such as sodium (Na+), into the presynaptic neuron. As a result, the electrical potential of the presynaptic neuron becomes more positive.

Due to the direct connection provided by the gap junctions, these positive ions can flow through the channels into the postsynaptic neuron. This movement of ions generates an electrical current that spreads across the postsynaptic neuron. The current causes depolarization of the postsynaptic membrane, leading to the initiation of an action potential in the postsynaptic neuron.

The strength of the electrical synapse is determined by the size of the gap junctions and the number of connexin proteins present. The larger the gap junctions and the more connexin proteins, the more ions can pass through, resulting in a stronger electrical coupling between the neurons.

at electrical synapses, the conduction of current on the postsynaptic neuron occurs through the direct flow of ions between the presynaptic and postsynaptic neurons via specialized gap junctions. This direct electrical coupling allows for rapid and synchronized transmission of signals. Electrical synapses are particularly important in neural circuits that require fast and coordinated communication, such as in reflex arcs or the synchronization of cardiac muscle cells.

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If the firm's MARR is 14% per year, the cost per kilowatt-hour of generating electricity is $1.571.

Given that a binary geothermal system will cost $90 million to build and $10 million to operate per year, then the present worth of the initial capital cost and annual cost can be found using the present worth factor as shown below:

PWF = 1-1/(1+i)n

where,

i = interest rate per period and

n = number of periods

PW of the initial capital cost = $90 million x PWF

(i=14%, n is 1)

= $90 million x 0.877

= $78.93 million

PW of the annual cost = $10 million x P(A/P, 14%, 30)

= $10 million x 9.209

= $92.09 million

Total PW = PW of the initial capital cost + PW of the annual cost

= $78.93 million + $92.09 million

= $171.02 million

Since the plant is to last for 30 years, the total energy output for the life of the project will be as follows:

Energy output = Capacity factor x Installed capacity x Number of years in operation x Number of hours per year

Energy output = 0.7 x 50 MW x 30 years x 8760 h/yr

Energy output = 108,540,000,000 Wh or 108,540,000 kWh

The cost per kilowatt-hour of generating electricity can then be found as follows:

Cost per kWh = Total PW/Total kWh

= $171.02 million/ (108,540,000 kWh x 1000)

= $1.571 per kWh

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Option 4 is correct: the light bulb extinguishes, and all the current flows through the wire.

When a wire is connected in parallel to a light bulb, it creates an alternate path for the current to flow. Since the wire has a lower resistance than the light bulb, it provides an easier path for the current to flow, causing all of the current to flow through the wire. As a result, the light bulb no longer has any current flowing through it, and it extinguishes.

This phenomenon is based on Ohm's Law, which states that the current flowing through a circuit is directly proportional to the voltage and inversely proportional to the resistance. Since the wire has a lower resistance than the light bulb, it provides an easier path for the current to flow, causing all of the current to flow through the wire, and none through the light bulb.

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Answer:6.4 meters eastward

Explanation: you’re displacement is supposed to be the distance of the initial position to the final position (where you started to where you finished) so that means you would have to subtract 9.2 by 2.8 to get 6.4, and because you subtracted from 9.2 the direction is eastward.

Hope I helped!

Answer:

don't  

Explanation:

The mass of the block is 4.5 kg that falls by 40m and work done is -1800J.

The work done is defined as the product of the displacement of an object and the component of the applied force which is in the direction of the object's displacement.

w=f × s

-1800=f×40

f=45 N

by Newton's 2nd law

F=ma

45=m×(10)

m=45÷10=4.5 kg

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The frequency of his spin increases by a factor of 2 if his angular speed increases to 2ω.

ω = 2 π / T

f = 1 / T

ω = Angular velocity

T = Time period

f = Frequency

ω = f * 2 π

fi = ω / 2 π

If angular speed increases to 2 ω,

ff = 2 ω / 2 π

ff = 2 fi

The constant 2 π is used because one revolution per second is equal to 2 π radians per second. Frequency is the repetition of an event per unit amount of time. Its Si unit is Hertz.

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The statement that describes at t =5 second is is the object speed up.

According to Newton's second law of motion, the acceleration of a body is equal to the net force acting on the body divided by its mass, a = Fm. This acceleration equation can be used to calculate the acceleration of an object if the mass of the object and the net force acting on it are known. The only acceleration of the projectile is the downward acceleration due to gravity.

The projectile has a vertical acceleration of 9.8 m/s/s throughout its trajectory. This acceleration value is constant. This means that the vertical velocity changes by the same amount every second. Instantaneous velocity is the speed of an object at a particular point in time. If the velocity is constant the average velocity for any time interval will not differ from the instantaneous velocity at that point in time.

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Answer:

Since the five forces applied are all in the same direction with the motion of the sled, to solve for the net force, add the five forces together. Therefore, the net force is 30 Newtons.

Explanation:

Calibration can be defined as the way an instrument is adjusted such that the measurement the instrument gives after calibration is precise and accurate.

One effective way to calibrate a thermometer is the use of ice water.

A thermometer can be defined as the instrument used to measure the temperature of a person or a substance.

A thermometer should be calibrated regularly in order to maintain a high level of precision and accuracy.

One of the effective ways to calibrate a thermometer is through the use of ice water.

The steps to calibrate a thermometer are given below:

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The final velocity of both the balls after collision is 2.17m/s and direction of movement is 45°.

mass of the the first clay ball = 28gm =0.028 kg

initial velocity of the first clay ball = u1 =3.4m/s

mass of the the second clay ball = 34gm =0.034g

initial velocity of the second clay ball = u2= 2.8m/s

Now, Initial momentum of the first ball: p1 = m1 × u1

p1 = (0.028)(3.4)

p1 = 0.0952 kg-m/s

Initial momentum of the second ball: p2 = m2 × u2

p2 =(0.034)(2.8)

p2 = 0.0952 kg-m/s

Resultant of initial momentum of both the balls:

Pi = √(Pxi² + Pyi²)

Pi = √{(0.0952)² + (0.0952)²}

Pi = 0.1346 kg-m/s

Finding final velocity by applying conservation of momentum-

Pi = Pf

mv = 0.1346

v = 0.1346 / 0.062

v = 2.17 m/s

Finding direction of the two balls's velocity-

tanθ = Pyi/Pxi

tanθ = 0.0952/0.0952

tanθ = 1

θ = 45°

Therefore, the final velocity of both the balls after collision is 2.17m/s and direction of movement is 45°.

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