\( 2.7 \) For the characteristic drown with the help of the corresponding readings of current and voltage given here above, determine for the device: [10] a) The forward current when the forward volta

The neutron number can be calculated by subtracting the atomic number from the mass number. In this case, 54 - 23 = 31. Therefore, the neutron number is 31.
To determine the element identity, we need to find the element with a mass number of 54 and a proton number of 23. This can be done by looking at the periodic table. Based on these numbers, we know that the element has 23 protons, which places it in the 23rd position on the periodic table. The element with the atomic number 23 is vanadium (V). Therefore, the element identity is vanadium (V).
In summary, for an element with a mass number of 54 and a proton number of 23, the neutron number is 31 and the element identity is vanadium (V).
To determine the neutron number and element identity, you can use the given mass number (A) and proton number (Z).
1. Neutron number:
Neutron number = Mass number (A) - Proton number (Z)
Neutron number = 54 - 23
Neutron number = 31
2. Element identity:
Since the proton number (Z) is also the atomic number, you can use it to identify the element. With an atomic number of 23, the element is Vanadium (V).
In summary, for the element X with mass number 54 and proton number 23, the neutron number is 31, and the element is Vanadium (V).

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Answer:

d in my opinion is the most opitmal answer

Explanation:

aka a graph comparing distances traveled by objects thrown on Earth and the moon

Answer:

Its d

Explanation:

a graph comparing distances traveled by objects thrown on Earth and the moon

Answer:average velocity is displacement divided by time Interval of the displacement

Explanation:

The insulating substance that allows for an electrical signal to travel much faster down an axon is called myelin.

The insulating substance that speeds up electrical signal transmission in axons is myelin. Myelin is a fatty substance produced by oligodendrocytes and Schwann cells, forming a protective sheath around the axons. It allows for saltatory conduction, where the electrical signal jumps between nodes of Ranvier, increasing the speed of transmission. Myelinated axons have regular gaps called nodes of Ranvier, which expose the axon membrane and facilitate faster signal propagation. Saltatory conduction is much faster than continuous conduction in unmyelinated axons. The myelin sheath prevents signal leakage and enables efficient communication within the nervous system. This mechanism is crucial for the rapid transmission of electrical signals over long distances in the nervous system.

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Answer:

When a net force acts on a body it produces acceleration in body the magnitude of tries acceleration is directly proportional to the net force acting and inversely proportional to the mass of the body

Mathematical form

F=ma

Explanation:

I hope it will help you

Answer:

The statements that describe the relationship between history and geography are:

Geography is the setting of the history's story.

Geography plays a role in historic events.

History affects geography, and geography influences history.

The second, third, and the fifth statements are the correct answers.

Explanation:

The advice the interviewee offered for students interested in his/her career was to be hardworking and persistent.

This is referred to as the chosen profession or occupation of an individual and is characterized by the individual taking the required courses or training which are needed in the execution of the tasks related to it.

The advise which was offered to the students was to be hardworking and persistent as there are lots of challenges and obstacles which one will face on the journey and will help overcome them and achieve the desired result in practicing the career.

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Answer:

15m

Explanation:

To burn off the calories from the small can of Pepsi, you would need to lift the sack of apples 25,104 times one meter .

Given:
- 1 food calorie = 4,184 joules
- Your system is 25% efficient in performing work
- 1,000 joules of work = 1 calorie burned
- Small can of Pepsi = 150 calories
- Sack of apples weight = 100 newtons
- Lifting height = 1 meter

First, let's find out how many joules are in the 150-calorie can of Pepsi:
150 calories * 4,184 joules/calorie = 627,600 joules

Next, we need to determine how many joules of work are required to burn off these calories, considering the 25% efficiency:
627,600 joules / 0.25 = 2,510,400 joules

Now we know that to burn off the 150 calories, you need to perform 2,510,400 joules of work. Since 1,000 joules of work burn off 1 calorie, let's find out how many times you need to lift the sack to accomplish this:

Work performed per lift = weight * height = 100 newtons * 1 meter = 100 joules

Finally, divide the total work required by the work performed per lift:
2,510,400 joules / 100 joules/lift = 25,104 lifts

So, you would need to lift the sack of apples 25,104 times one meter to burn off the calories from the small can of Pepsi.

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Answer:

\(speed \: = \frac{distance}{time} \\ speed \times time = distance \\ 8.3ms^{ - 1} \times 1200s \\ 9960m\)

30km/h = 8.3ms^-1

20min = 1200s

If a car moves along a straight path with a speed of 30 kilometers per hour then it would cover a distance of 10 kilometers in  20 minutes​.

The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object.

As given in the problem If a car moves along a straight path with a speed of 30 kilometers per hour then we have to find how much distance will the car travel in 20 minutes​

the distance covered in 1 hour = 30 kilometers

the distance covered in 60 minutes = 30 kilometers

the distance covered in 1 minute  = 30/60 kilometers

the distance covered in 20 minutes = 20 ×30/60 kilometers

                                                            = 10  kilometers

Thus, the car would cover a distance of 10 km in 20 minutes.

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At rest, the end-systolic volume (ESV) is typically around 40-50% of the end-diastolic volume (EDV) in a healthy individual.

The end-diastolic volume (EDV) refers to the volume of blood in the ventricles at the end of diastole, which is the relaxation phase of the cardiac cycle when the ventricles are filled with blood. The end-systolic volume (ESV) is the volume of blood remaining in the ventricles at the end of systole, which is the contraction phase of the cardiac cycle when blood is ejected from the ventricles. During systole, the ventricles contract and forcefully pump blood out into the arteries. However, they do not completely empty, and a certain volume of blood remains in the ventricles. This residual volume is the end-systolic volume (ESV).

The difference between the end-diastolic volume (EDV) and the end-systolic volume (ESV) is known as the stroke volume (SV), which represents the volume of blood ejected from the heart with each beat. In a healthy individual at rest, the stroke volume is typically around 50-60% of the end-diastolic volume (EDV). Therefore, the end-systolic volume (ESV) would be approximately 40-50% of the end-diastolic volume (EDV). This indicates that the heart pumps out roughly half of the blood present in the ventricles during each contraction, with the remaining blood constituting the end-systolic volume.

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The diameter of the sphere can be solved using the relationship between the tension in the string, the linear density of the string, and the frequency of the standing waves.

This relationship is given by the equation:
f = (n/2L) * sqrt(T/u)

where f is the frequency of the standing wave, n is the number of the harmonic, L is the length of the string, T is the tension in the string, and u is the linear density of the string.

Before the sphere was submerged, the tension in the string was equal to the weight of the sphere, or T = (2.1 kg) (9.8 m/s^{2}) = 20.58 N.

After the sphere was submerged, the tension in the string was reduced by the buoyant force of the water, which is equal to the weight of the water displaced by the sphere. The volume of the sphere is given by:

V = (4/3) * pi * (d/2)^{3}

where d is the diameter of the sphere. The weight of the water displaced is equal to the volume of the sphere times the density of water, or:

Fb = (4/3) * pi * (d/2)^{3} * (1000 kg/m^{3}) * (9.8 m/s^{2})

The tension in the string after the sphere was submerged is equal to the weight of the sphere minus the buoyant force, or:

T' = 20.58 N - (4/3) * pi * (d/2)^{3} * (1000 kg/m^{3}) * (9.8 m/s^{2})

Since the frequency of the fifth harmonic with the sphere submerged is equal to the frequency of the third harmonic before the sphere was submerged, we can set the two equations equal to each other and solve for d:

(5/2L) * sqrt(T'/u) = (3/2L) * sqrt(T/u)

Squaring both sides and rearranging terms gives:

(25/9) * (T'/T) = (u/u)

Substituting the expressions for T and T' and simplifying gives:

(25/9) * [(20.58 N - (4/3) * pi * (d/2)^{3} * (1000 kg/m^{3}) * (9.8 m/s^{2}))/(20.58 N)] = 1

Solving for d gives:

d = 2 * [(9/25) * (20.58 N)/(4 * pi * (1000 kg/m^{3}) * (9.8 m/s^{2})) - (1/3)]^{(1/3)}

d = 0.117 m

Therefore, the diameter of the sphere is 0.117 m, or 11.7 cm.

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Answer:41xm/s

Explanation:

Answer:41xm/s

Explanation:

I found this for you hope it helps.

Answer:

c. 15.4 s

Explanation:

Given the following data;

Mass, m = 50kg

Force, F = 130N

Initial velocity, u = 20m/s

Final velocity, v = 60m/s

To find the time;

First of all, we would solve for acceleration using the formula below;

Force = mass * acceleration

130 = 50*acceleration

Acceleration = 130/50

Acceleration = 2.6m/s²

Now, we would use the first equation of motion to find the time.

V = U + at

60 = 20 + 2.6t

2.6t = 60 - 20

2.6t = 40

t = 40/2.6

Time, t = 15.39 ≈ 15.4 seconds.

The time taken will be 15.4 seconds approximately. The correct answer is option c

NEWTON SECOND LAW

Newton's second law state that, the rate of change of momentum is proportional to the force applied.

Given that  a force of 130 N be applied to an object of mass 50 kg to change its speed from 20 m/s to 60 m/s. The given parameters are;

from Newton's second law,

Ft = m(v - u)

Substitute all the parameters into the formula

130t = 50 (60 - 20)

130t = 50 x 40

130t = 2000

t = 2000/130

t = 15.38 seconds

Therefore, the time taken will be 15.4 seconds approximately. The correct answer is option c

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Single-celled organisms have a high surface area to volume ratio that benefits them.

High surface area to volume ratio of single-celled organisms allows them to rely on oxygen and material diffusing into the cell in order for them to survive. Higher is the surface area to volume ratio , more effective this process can be.

A high surface area to volume ratio creates a strong "driving force" to speed up thermodynamic processes and minimize free energy.

The surface area to volume ratio is also a very important factor for the performance of a building because greater is the surface area then potential heat gain or loss through it is also greater. A small S/V ratio implies minimum heat gain and loss.

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Answer:

with 75kg --> 165.35 pound(lb)

Explanation:

\( \frac{75}{0.45359237} \)

The migrating birds would have migrated by 4,200 miles if they move at an average speed of 25 miles per hour, 12 hours per day, and for 2 weeks.

The birds moves at an average speed of 25 miles per hour and averages 12 hours per day. The distance covered per day can be derive:

Distance = speed x time

                = 25 x 12

                   = 300 miles

Now, if the birds migrate for 2 weeks, that is 14 days, the total distance covered in those days would be:

                   300 x 14

                              = 4,200 miles

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Answer:

Inter Quartile Range

Explanation:

Quartile is a positional statistical average, which divided the data into 4 equal halves.

Q1 (Lower Quartile) has 25% data below it, 75% above it. Q3 (Upper Quartile) has 75% data below it, 25% above it.

Interquartile range is the measure used to calculate how far the lower & upper quartiles are.

The velocity of the car before the brakes were pressed was approximately 17.995 m/s. This velocity is obtained by subtracting the product of the acceleration and time from the final velocity using the kinematic equation.

To determine the velocity of the car before the brakes were pressed, we can use the kinematic equation that relates initial velocity (Vi), final velocity (Vf), acceleration (a), and time (t):

Vf = Vi + at

In this case, the final velocity (Vf) is given as 3.5 m/s, the acceleration (a) is -6.5 m/s² (negative sign indicates deceleration), and the time (t) is 2.23 seconds. We need to find the initial velocity (Vi).

Rearranging the equation, we have:

Vi = Vf - at

Substituting the given values, we get:

Vi = 3.5 m/s - (-6.5 m/s² * 2.23 s)

  = 3.5 m/s + 14.495 m/s

  = 17.995 m/s

Therefore, the velocity of the car before the brakes were pressed was approximately 17.995 m/s.

It's important to note that the direction of the velocity would be west since the car was initially driving west along Steeles Avenue and experienced acceleration in the east direction. However, since the problem does not explicitly mention the direction, we focus on the magnitude of the velocity.

The negative sign of the acceleration indicates deceleration, and the direction of the velocity is west based on the initial direction of the car.

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let the bowling ball initially is moving along the x-axis,

The whole process can be represented as,

Before the collision the net kinetic energy of the balls is,

where the values of the variables are given as,

As the value of cos(90) is zero.

Substituting the known values,

The value of the net kinetic energy with the velocity along the y-axis before the collision is,

The velocity of the second ball is at rest in the initial state, thus its value is taken as zero.

After the collision of the balls, the net kinetic energy is,

Negative sign here indicating the direction of the final balls motion will be opposite to the each other.

The values of the variables are given as,

Substituting the known values,

The value final kinetic enegry of the balls with velocity along the y-axis is,

Here 360 degree is used because the pin ball direction is downward of the positive x-axis.

Then by the law of conservation of energy along the y-axis,

Thus, the y component of the final velocity of the bowling ball of mass m1 is 5 meter per second.

Answer:

u breathe lol nice ok bro

Athletes are asked to immediately squat to a depth of their choosing and then jump as high as they can in the Countermovement Jump (CMJ), a vertical jump test.

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Answer:

The magnitude of the acceleration is 1.6 m/s².

Explanation:

We can find the magnitude of the acceleration by using the following equation:

\( x_{f} = x_{0} + v_{0}t + \frac{1}{2}at^{2} \)

Where:

\( x_{f}\): is the final position = 80 m

\( x_{0\): is the initial position = 0

\( v_{0}\): is the initial speed = 0 (it starts from rest)

a: is the acceleration =?

t: is the time = 10 s

Hence, the acceleration is:

\( a = \frac{2x_{f}}{t^{2}} = \frac{2*80 m}{(10 s)^{2}} = 1.6 m/s^{2} \)

Therefore, the magnitude of the acceleration is 1.6 m/s².

I hope it helps you!          

Answer:

0.5 g/cm3

Explanation:

solution,

Here given,

mass of wood=48 g

volume of wood = 96 cm^3

density = ?

Now,

density =mass/ volume

= 48/96

=0.5 cm^3

Answer:

0.5g/cm³.

Explanation:

the density of a substance is it Mass divided by it volume.

mass =48g

volume =96cm³

Density =mass/volume

Density =48g/96cm³

Density =0.5g/cm³.

1,013.75 kg/m3 is what's found to be the mixture's density.

Per unit of length, area, or volume, there is a certain amount of something: as. : celebration of an object per unit volume.

A polystyrene cup can float in water whereas a ceramic cup will fall due to the difference in density between the two materials. Due to its lower density than water, wood typically floats on the surface of liquids. Generally speaking, rocks sink because they are denser than water.

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To clean grease or carbon tracks from capacitors or coils that are used in magnetos, use a good quality electrical contact cleaner. Electrical contact cleaners can remove any dirt, grease, or carbon tracks that may have accumulated on the coils and capacitors used in magnetos.

A capacitor is a device that stores electric charge. It's a passive electrical component that can store energy in an electric field. Capacitors are widely used in electronic circuits for a variety of purposes, including storing electrical energy, separating DC signals from AC signals, and tuning radio frequencies.

A magneto is an electrical generator that converts mechanical energy into electrical energy. It's a type of alternator that is self-contained and does not require a separate power source. Magnetos are used in internal combustion engines, such as those found in automobiles, motorcycles, and aircraft.

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Answer:

Distance, d is 86.1 meters.

Explanation:

Given the following data;

Time, t = 6.15secs

Velocity = 14m/s

Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.

Mathematically, velocity is given by the equation;

\(Velocity = \frac{distance}{time}\)

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

\(d = Vt\)

Substituting into the above equation;

\(d = 14 * 6.15\)

d = 86.1m

Hence, the distance traveled by the boat is 86.1 meters.

The true statements are;

A. The period of a wave is measure in seconds.

B. The symbol used for the period of a wave is T

The period of a wave is the time taken for a wave to complete a cycle.

The period of a wave is measured in seconds.

T = 2πd/V

where;

The frequency of a wave is the number of cycles completed by the wave in a given time.

F = 1/T (measured in Hz)

The relationship between speed, wavelength and frequency of a wave is given as;

V = Fλ

where;

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