what is the poh of a solution at 25 oc when the ph is 5.42?

Explanation:

a) Velocity and acceleration of a car are parallel when the car is moving along a straight line in the same direction. For example, when a car is gaining speed as it moves forward in a straight line, both velocity and acceleration are directed in the same direction.

b) Velocity and acceleration of a car are anti-parallel when the car is moving along a straight line in the opposite direction. For example, when a car slows down while moving in a straight line, its acceleration is directed opposite to the direction of its velocity, or the other way around.

Answer:

a)

There is only one case where velocity and acceleration are parallel only when they are moving in the same direction.

b)

There are 3 cases where velocity and acceleration are antiparallel.

(i) When both are moving in different direction

   It means :

(ii) When the object is slowing down, where velocity and acceleration are in the opposite direction.

(iii) In case of motion reversal.

Explanation:

Answer:

S1 = V0 t - 1/2 a t^2     to stop moving car

t = 22m/s / 7.11 m/s^2 = 3.09 sec to decelerate moving car

S1 = 22 * 3.09 - 1/2 ^ 7.11 * 3.09^2 = 34.0 m   to decelerate car

22 m/s * .83 s = 18.3 m      distance traveled due to reaction time

S = (34.0 + 18.3) m = 52.3 m      or about 172 ft

Answer:

a) Volt

Explanation:

The standard metric unit on electric potential difference is the volt.

answer

all of the above

explanation

as we know that the si unit of potential difference is volt

which is equal to j/c and j/c is equal to j/a.s so the correct answer is all of the above

Answer:

a

Explanation:

light can not pass through it completely

The density of sugar, which is in 1.58 g/cm³, is equivalent to 0.05708 in/in³.

Density is a measure of the mass of matter contained by a unit volume.

Density is a function of mass and density, hence, it is measured in units of grams (g) and cubic centimeters (cm³).

However, cubic centimeters can be converted to pounds per cubic inch as follows:

1 gram / cubic centimetre = 0.0361 pound / cubic inch

According to this question, the density of sugar is 1.58 g/cm³. This value is equivalent to;

= 1.58 × 0.0361 = 0.05708

Therefore, the density of sugar, which is in 1.58 g/cm³, is equivalent to 0.05708 in/in³.

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Answer:

B train!

Explanation:

A train travelled at 40 km/hr. (120/3)

B train traveled at 45 km/hr (180/4)

Answer:

Train B

Explanation:

Let's find each train's speed using the following formula.

\(s=\frac{d}{t}\)

where \(d\) is distance and \(t\) is time.

Train A

Train A travelled a distance of 120 kilometers in 3 hours.

\(s=\frac{d}{t}\\d=120 km\\t= 3hrs\)

Substitute the values into the formula and divide.

\(s=\frac{120km}{3hrs}\\\)

\(s= 40 km/hr\)

Train B

Train B travelled a distance of 180 kilometers in 4 hours.

\(s=\frac{d}{t}\\d=180 km\\t= 4hrs\)

Substitute the values into the formula and divide.

\(s=\frac{180km}{4 hrs}\\\)

\(s= 45 km/hr\)

45 kilometers per hour is greater than 40 kilometers per hour, so Train B travelled faster.

Values calculated are as : ω is 3160 rad/sec; R is 175 ohm;  Imax= 0.143 A  and t= 0.000331 sec.

An LRC circuit is also known as a tuned circuit, or an RLC circuit It is an electrical circuit consisting of an inductor (L), capacitor (C), and resistor (R) connected in series or parallel.

= √//( 8 *10^-3 * 12.5 * 10^-60

= 3160 rad/sec.

2. Impedance:

Z= √R² + (XL - Xc)²=

= √R²

= 175 ohm

3. Imax= V/Z

= 25/175

= 0.143 A

I = Imax cosωt

Imax/2= I max cosωt

cosωt= 1/2

t = 0.000331

v= Vcosωt= 12.5 V

VR = IRcosωt= 12.5 V

voltage across the capacito

Vc = IXc Cos(ωt - π/2)

= 3.13 V

voltage across the inductor

VL=  IXL Cos(ωt + π/2)

= -3.13V

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Note: The question given on the portal is incomplete. Here is the complete question.

Question: An L-R-C series circuit is constructed using a 175Ω resistor, a 12.5μF capacitor, and an 8.00-mH inductor, all connected across an ac source having a variable frequency and a voltage amplitude of 25.0 V.

1-At what angular frequency will the impedance be smallest?

2-What is the impedance at this frequency?

3-At the angular frequency in part A, what is the maximum current through the inductor?

4-At the angular frequency in part A, find the potential difference across the ac source, the resistor, the capacitor, and the inductor at the instant that the current is equal to one-half its greatest positive value.

Answer:

wool

Explanation:

Wool comes from sheep.  Rayon, candles (the paraffin type) and petrochemicals all come from petroleum.

The two units of Power are Watt and Horse power. The correct options are A and D.

Thus, Watt - In the International System of Units (SI), the watt (W) serves as the default unit of power.

It displays the amount of effort or energy transferred per unit of time. Hp. The horsepower (HP) unit of power is a non-SI measure of power that is frequently used when discussing mechanical power.

In the automotive and industrial industries, in particular, it is frequently employed for rating the engine power. Watt and D. HP are the appropriate units of power from the listed options.

Thus, The two units of Power are Watt and Horse power. The correct options are A and D.

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Answer:

Explanation:

The kinetic energy of an object can be found by using the formula

\(k = \frac{1}{2} m {v}^{2} \\ \)

v is the velocity

m is the mass

From the question we have

\(k = \frac{1}{2} \times 1300 \times {20}^{2} \\ = 650 \times 400 \\ = 260000\)

We have the final answer as

Hope this helps you

The bond with the highest bond dissociation energy is the triple bond between two nitrogen atoms (N≡N). The bond dissociation energy is the energy required to break a bond between two atoms and is a measure of the bond strength.

Since there are three covalent bonds involved, sharing a total of six electrons between the two atoms, the triple bond formed by two nitrogen atoms is extremely strong. The BDE for the NN bond is around 945 kJ/mol, which is much higher than the BDE for the majority of other covalent bonds, such as the double bond (N=N) between two nitrogen atoms and the single bond (N-N) between two nitrogen atoms, both of which have BDEs of roughly 418 kJ/mol. One way to measure how strong a chemical bond A–B is is by examining at the bond-dissociation energy. It may be described as the typical enthalpy shift that occurs when A and B, which are typically radical species, are split apart by homolysis.

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Answer: the marble will remain in place at a constant velocity of zero

Explanation:

Newton's first law states that a body at rest will remain at rest, and a body in motion will remain in motion in a straight line at a constant velocityunless acted upon by an outside force

Its a Conduction NO FOR REAL ITS A

Answer:

c, convection

Explanation:

edge 2020

The vertical velocity of the ball will decrease with time.

The relation between the vertical velocity and time is given as,

Here, u is the initial velocity and g is acceleration due to gravity.

Examples of student-led organizations are:

The benefits of getting involved in any of these are many. They include but are not limited to:

Learn more about student organizations in the link below:

Answer:

in the nucleus of the atom

Explanation:

a p 3 x

Answer:

True

Explanation:

Generally speaking, we say that light travels in waves, and all electromagnetic radiation travels at the same speed which is about 3.0 * 108 meters per second through a vacuum.

Answer:

absolutely true

Explanation:

as it travels in a speed of 30×108 m per second

Answer:

open the dictionary/glossary. it will give you the definitions of the words there.

Explanation:

Answer:

i think it goes like this

Explanation:

0.00025 N is the magnitude of the net force on the first wire in (figure 1).

The total of all forces exerted on an item is known as the net force. A mass can accelerate due to net force. A body is subject to another force whether it is at rest or in motion. When there are a lot of forces acting on a system, the phrase "net force" is employed.

From the diagram, first wire has an attracting force from third wire at 0.04 m distance and a repelling force from second wire at 0.02 m distance.

Expression of the force is -

F = [µ ×π×(I)² × L] / (2πd)

When d = 0.02 m,

or, F = [4 ×π× 10⁻⁷(10)² × 0.50] / (2π × 0.02)

or, F = 0.0005 N

And when d = 0.04 m,

or, F = [4 ×π× 10⁻⁷(10)² × 0.50] / (2π × 0.04)

or, F =  0.00025 N

So, the net force on first wire  = 0.005 - 0.00025

= 0.00025 N repelling or upward.

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The complete question is as follows:

What is the magnitude of the net force on the first wire in (Figure 1)?

Express your answer in newtons.

Answer:

302.5 km

Explanation:

Taking into account the definition of density, the volume of the sample of gold is 0.0646998 L.

Density is defined as the property that allows us to measure the amount of mass in a certain volume of a substance.

The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:

density= mass÷ volume

From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.

In this case, you know that:

Replacing in the definition of density:

19.32 g/cm³= 1250 g÷ volume

Solving:

19.32 g/cm³× volume= 1250 g

volume= 1250 g÷ 19.32 g/cm³

volume= 64.6998 cm³= 0.0646998 L (1 cm³= 0.001 L)

In summary, the volume of the sample of gold is 0.0646998 L.

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Answer:

Answer in Observational evidence (b)

The evidence needed to formulate a hypothesis is observational evidence. From keen observations, we are formulating a scientific hypothesis.

Hypothesis is a plausible scientific statement which predicts a process or result of an experiment based on observations. Hypothesis can be made from well established scientific records also.

Some are formulating hypothesis based on some intuitions, while some others are formulated based on inductions or  deductions. An experiment starts from a clear cut hypothesis.

A hypothesis must be testable, falsifiable. A scientific hypothesis must be based on a strict observation and for a considerable time and the observations must support for the statement derived for the solution.

Hence, the evidence is needed for a or a hypothesis to be supported or not supported is observational evidence.

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To calculate the magnitude of the force that would exactly counterbalance these three forces, we need to use the principle of vector addition. This involves combining the three forces vectorially to find the net force acting on the object.

First, we need to find the resultant of the two forces that are at an angle of 90 degrees to each other. This can be done using the Pythagorean theorem:

Resultant = √(25² + 12²) = √(625 + 144) = √769 = 27.74 N

Next, we need to find the net force acting on the object by adding the third force (4 N) to the resultant of the first two forces (27.74 N).

Net force = 4 N + 27.74 N = 31.74 N

Therefore, the magnitude of the force that would exactly counterbalance these three forces is 31.74 N.

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Given parameters:

Duration of crash = 9min

Velocity before crash = 2000 yards per second

Unknown:

Acceleration of the plane = ?

Solution:

Acceleration is the change of velocity with time.

  Acceleration  = \(\frac{V - U}{t}\)

where v is the final velocity

          u is the initial velocity

          t is the time taken

We need to convert the time into seconds from min;

                      60s  = 1 min

                                So, 9min = 60 x 9 = 540s

So input the parameters and solve;

                  Acceleration = \(\frac{2000 - 0 }{540}\)  = 3.7yards/s²

The acceleration of the plane is 3.7yards/s²

Static equilibrium means that all forces are equal, so to make this easiest you want to break F1 into it's horizontal and vertical components. As there are no other forces acting in the horizontal, we know the horizontal component of F1 is 40N.

Dynamic equilibrium is a state in which bodies are moving at a constant speed as opposed to static equilibrium, which is a state in which bodies are at rest (rectilinear motion). The total amount of forces exerted on them in both situations is zero.

When two forces are acting on an object that is in static equilibrium, it indicates that their sum is zero, which makes static equilibrium a useful analytical tool. You may create an equation to figure out the direction and strength of the unknown force if you know the direction and strength of one of the forces.

Thus, Static equilibrium means that all forces are equal, so to make this easiest you want to break F1 into it's horizontal and vertical components.

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The threshold frequency is 6.2∗10^14 Hz that causes electrons to be ejected.

What is the electron's threshold frequency?

The lowest frequency of light that, when it strikes a metal surface, triggers the emission of electrons is known as the threshold frequency.

How many electrons are emitted from the surface depends on what.

As a result, the quantity of photons, or the brightness of the light, determines how many electrons are ejected. A portion of the packet's energy is used to defeat the metal's electron's binding energy. The work function, or, is the name given to this tying energy.

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Answer:

0.48N

Explanation:

according to the second law of motion

force=mass×acceleration

the mass in this question is 0.025,the acceleration 19

therefore f=0.025×19

=0.48N

I hope this helps