As a result, the magnitude of the electric field at z = 12 cm from the disk is around 2.46 x 10^4 N/C.
What is electric field?The physical field that surrounds electrically charged particles and exerts force on all other charged particles in the field, either attracting or repelling them, is known as an electric field. It also refers to the physical field of a charged particle system. An electric field is an area of space in which an electrically charged particle or object would experience force. A vector quantity, an electric field can be represented by arrows pointing toward or away from charges.
Here,
The electric field produced by a uniformly charged disk of radius R and surface charge density σ at a point located at a distance z from the disk along its central axis can be calculated using the equation:
E = kσ / z,
where k is the Coulomb constant (k = 8.99 x 10^9 Nm^2/C^2).
Converting the surface charge density to C/m^2:
σ = 5.3 x 10^-6 C/m^2
Substituting the values in the equation:
E = (8.99 x 10^9 Nm^2/C^2) (5.3 x 10^-6 C/m^2) / (12 x 10^-2 m) = 2.46 x 10^4 N/C
So, the magnitude of the electric field at the point z = 12 cm from the disk is approximately 2.46 x 10^4 N/C.
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a particle moves along a straight line with equation of motion s = f(t), where s is measured in meters and t in seconds. find the velocity and speed when t = 9.
The value of velocity at t = 9 when the equation of motion is given is calculated to be -1.0123.
The given function is f(t) = (t^-1) - t, it is an equation of motion.
On derivation of the equation of motion, we get the equation of velocity.
Taking derivative on both the sides of the function,
f'(t) = d/dt[(t^-1) - t)] = d/dt(t^-1) - d/dt(t)
f'(t) = -1(t^-2) -1
f'(t) = -t^-2 - 1
f'(t) = v(t),
It can be also written as,
-1/t^2 - 1
To find out the velocity at t = 9, place the value in the above equation.
So, v(9) = -1/(9^2) - 1 = -1/81 - 1 = -0.0123-1 = -1.0123
The given question is incomplete. The complete question contains 'f(t) = (t ^-1) - t.'
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An elevator is moving upward and speeding up. What is the sign of the work done by the force of gravity acting on the elevator? A) positive B) Negative C) Zero D) this question cannot be answered without knowing the direction of the elevator's acceleration.
The downward force caused by gravity will be the same as the normal force, that is the power of the elevators on this child's shoes. So, 98 newtons will be the typical force in this situation.
What does force in physics mean?
You can also use words like stretch and compress to describe force. Force is described in physics as the pull or push that causes a massed object to change its speed. Force is an outside agent that has the power to alter a body's resting or moving position.
What is a good instance of force?
When applied, force is an outside factor that modifies or tends to modifies a body's condition; if indeed the body is moving
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what is the magnitude of a vertical electric field that will just barely counterbalance the weight of a plastic bead of mass 2.20 g if the bead has been charged to 1.40 μc?
The required magnitude of a vertical electric field that will just barely counterbalance the weight of a plastic bead is calculated to be 15.42 × 10³ C.
The mass of the bead is given as, m = 2.2 g = 2.2 × 10⁻³ kg
The charge on the bead q = 1.4 μc = 1.4 × 10⁻⁶ c
Magnitude of vertical electric field = ?
The electric field's force on the charged plastic sphere equals q E.
The plastic spherical is m g in weight.
where, g is the acceleration due to gravity
Now the force due to electrostatic field is balanced by the weight of the plastic sphere.
q E = m g
E = m g / q
E = (2.2 × 10⁻³)(9.81)/(1.4 × 10⁻⁶) = (2.2 × 9.81 × 10³)/1.4 = 15.42 × 10³ C
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How long does it take for radio signals to travel from Earth?
The time it takes for radio signals to travel from Earth depends upon the distance they are traveling to. Radio signals travel at the speed of light, which is roughly 299,792,458 meters each second.
In this way, to compute the time it would take for a radio transmission to travel a specific distance, you would isolate the distance by the speed of light which is about 3 x 108 m/s
For example, if the radio transmission is traveling to a planet that is 40 million kilometers away, it would require the radio transmission roughly 133.3 seconds to arrive.
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draw x−t graph for the motion of the bumper between t=0 and t=2.00s .
The graph of x-t for the motion of the bumper between t=0 and t=2.00s is a straight line that starts at the origin (x = 0, t = 0) and ends at (x = 2, t = 2). This shows that the bumper moves with a constant speed of 2 m/s.
What is the graph ?A graph is a visual representation of data or information. It typically includes a set of points that are connected by lines or curves to form a picture. Graphs are used to easily visualize trends, compare values, and show relationships between different data sets. They provide an effective way to communicate information to a wide range of audiences. Graphs can be used to illustrate almost any type of data, from population trends to stock market fluctuations.
This graph can be interpreted as follows: the bumper starts from rest (x = 0) at t = 0 and travels a distance of 2 meters in 2 seconds, meaning it has a constant velocity of 2 m/s. The slope of the line is equal to the velocity of the bumper, so m = 2 m/s. This means that for every 1 second that passes, the bumper moves 2 meters.
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a student must conduct an experiment in which an elastic collision occurs. in the experiment, block x of mass 2kg travels with a velocity vx in the positive direction toward block y of mass 2kg that is at rest, as shown in figure 1. after the collision, block y travels in the positive direction with velocity vy while block x remains nearly at rest. data collected of the initial and final velocities of both blocks for three trials of the experiment are shown in the table. did the student conduct an experiment in which an elastic collision occurred? is the system of block x and block y open or closed?
Yes, the student conducted an experiment in which an elastic collision occurred. The system of block x and block y is a closed system.
What is closed system?
A closed system is a system where the components are isolated from the environment. This type of system does not allow any kind of exchange of energy, matter, or information with the environment.
This means that the system is in a state of equilibrium, where the total energy and matter is conserved, and the system is not affected by any external influences.
Therefore, Yes, the student conducted an experiment in which an elastic collision occurred. The system of block x and block y is a closed system.
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why should the wavelength scale of spectroscope be calibrated
Your spectroscope must be calibrated in order to account for systematic inaccuracy. The helium discharge tube is a handy source of emission lines.
Why is it necessary to calibrate the spectroscope's wavelength?Spectrometers will inevitably drift over time as a result of impacts and effects from the environment. Regular wavelength calibration, which helps to assure accurate and dependable spectroscopic data, can readily address this prevalent problem. The wavelength calibration verifies that the grating's angular position setting and the wavelengths assigned to each pixel on the CCD array detector are correct. By analysing the spectra of an orange glass and a suspension of microalgae, the process is demonstrated.
This is accomplished by comparing the wavelengths you empirically determined to wavelengths discovered via research in the literature.
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The distance between the centres of the Moon and the earth is D. The mass of the earth is 81 times the mass of the Moon. At what distance from the centre of the earth, the gravitational force will be zero?
The distance at which the gravitational force will be zero is called the balance point, or the Lagrange point.
define distance ?
Distance refers to the amount of space between two points or objects. It is a scalar quantity and is measured in units of length, such as meters, feet, or kilometers. The distance between two points is equal to the length of the path connecting those two points.
The distance at which the gravitational force will be zero is called the balance point, or the Lagrange point. This distance can be calculated using the formula for the gravitational force between two masses and setting it equal to zero. However, the exact value of this distance would depend on the specific masses and distances involved, which are not specified in the question.
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a motorcycle has a constant acceleration of 4.59 m/s2. both the velocity and acceleration of the motorcycle point in the same direction. how much time is required for the motorcycle to change its speed from (a)23.5 to 33.5 m/s, and (b)53.5 to 63.5 m/s?
Time is required for the motorcycle to change its speed from (a)23.5 to 33.5 m/s, and (b)53.5 to 63.5 m/s is 4 s.
What is velocity?
Velocity is a vector quantity that measures the rate of change of the position of an object in a given direction. It is the speed at which an object is moving in a specific direction, usually measured in meters per second (m/s).
Velocity can be calculated by dividing the distance travelled by the time taken to travel that distance. It is the rate of change of an object's position in a given direction. Velocity can also be affected by acceleration, force, and gravity.
(a) Time required = (Final velocity - Initial velocity)/Acceleration
Time required = (33.5 - 23.5) / 4.59
Time required = 4 s
(b) Time required = (Final velocity - Initial velocity)/Acceleration
Time required = (63.5 - 53.5) / 4.59
Time required = 4 s
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what's the mass of the Sun?
Volume and mass The sun has a total volume of 1.4 x 10 28 cubic meters. According to NASA data, 1.3 million Earths might fit inside the sun.
How does physics define mass?
It is the most fundamental characteristic of matter and one of the basic quantities in physics. Mass is a term used to describe how much matter is there in a body. The kilogram is the SI mass unit. (kg). A body's mass does not alter at any point in time. only in rare instances where a significant quantity of energy is supplied to or taken away from a body.
How is mass determined?
Mass can be calculated using the formula: mass = volume density. Weight serves as a gauge for gravitational force.
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what is the time for one cycle of the radio wave?
A radio wave's frequency is the number of cycles it completes in one second, and is measured in hertz (Hz).
One cycle of a radio wave is the time it takes for the wave to complete a cycle of its waveform, from the peak to the trough, and back to the peak again. A radio wave's frequency is the number of cycles it completes in one second, and is measured in hertz (Hz). For example, a radio wave with a frequency of 1 MHz (one million hertz) will have a cycle time of 1 microsecond (one millionth of a second).
The cycle time of a radio wave is the inverse of its frequency, and represents the time it takes for the wave to complete one full cycle of its waveform, from peak to trough and back to peak again. The higher the frequency, the shorter the cycle time, and vice versa.
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An object has a charge of -1.6x10-13C, and object B is electrically neutral. Two million electrons are removed from A and placed on B. Expressed in coulombs, what is the resulting charge (algebraic sign and magnitude) on A and on B? (step by step explanation please)
The resulting charge on A is [tex]1.6 x 10^-7[/tex] C, and the resulting charge on B is [tex]-3.2 x 10^-7[/tex] C.
What do you mean by charge?A charge is a property of matter that results from the presence or absence of electrons. It can be either positive or negative, and two objects with opposite charges will be attracted to each other, while two objects with the same charge will repel each other. The unit of charge is the Coulomb (C), which is defined as the amount of charge carried by 6.242 x 10^18 electrons. The concept of charge is important in many areas of physics, including electricity and magnetism, and plays a role in many natural phenomena and technological applications.
The charge on object A is [tex]-1.6 X10^-13[/tex]C.
When two million electrons are removed from object A, the charge on object A becomes more negative. The charge on object A can be calculated using the formula:
Q = Q - ne,
where Q is the original charge, n is the number of electrons, and e is the charge of an electron, which is -1.6 x 10^-19 C.
Therefore, the charge on object A becomes:
[tex]Q = -1.6 X 10^-13 C - (2X10^6)(-1.6X 10^-19 C)[/tex]
[tex]= -1.6 X 10^-13 C + 3.2X 10^-7 C[/tex]
= 1.6 x 10^-7 C
Object B starts as electrically neutral, which means that the total charge on B is 0 C. When two million electrons are placed on object B, the charge on object B becomes more negative. The charge on object B can be calculated using the formula:
Q = Q + ne,
where Q is the original charge, n is the number of electrons, and e is the charge of an electron, which is -1.6 x 10^-19 C.
Therefore, the charge on object B becomes:
Q = 0 C + (2 x 10^6)(-1.6 x 10^-19 C)
[tex]= -3.2 X 10^-7 C.[/tex]
So, the resulting charge on A is[tex]1.6 X 10^-7[/tex]C, and the resulting charge on B is [tex]-3.2X 10^-7[/tex] C.
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A 100 g steel ball falls from a height of 1. 8m on to a metal
plate and rebounds to a height of 1. 25 m. Find
a the p. E. Of the ball before the fall (g = 10 m/s2).
bits k. E. As it hits the plate,
cits velocity on hitting the plate,
d its k. E. As it leaves the plate on the rebound,
e its velocity of rebound.
(a) The potential energy of a 100 g steel ball that falls from a height of 1. 8m on to a metal plate and rebounds to a height of 1. 25 m. before the fall = 1.8 Joules
(b) The kinetic energy as it hits the plate = 1.8 Joules
(c) The velocity on hitting the plate = 6 m/s
(d) The kinetic energy as it leaves the plate on the rebound = 5 m/s
To determine the potential energy, use the equation:
PE = mgh
Where:
m = mass of the object (kg)
g = acceleration due to gravity (10 m/s²)
h = height (m)
Hence,
(a)
The potential energy:
PE = mgh
= (0.1) (10) (1.8
= 1.8 Joules
(b)
The kinetic energy as it hits the plate:
KE = PE
KE = 1.8 Joules
(c)
The velocity on hitting the plate:
KE = [tex]\frac{1}{2}[/tex] mv²
1.8 = [tex]\frac{1}{2}[/tex] (0.1)v²
v = 6 m/s
(d)
The kinetic energy as it leaves the plate on the rebound:
PE = mgh
= (0.1) (10) (1.25)
= 1.25
KE = [tex]\frac{1}{2}[/tex] mv²
1.25 = [tex]\frac{1}{2}[/tex] (0.1) v²
v = 5 m/s
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Measurement that is used to record the heat transfer of a solution in a classroom investigation.
The most common measurement used to record heat transfer in a classroom investigation is a calorimeter.
A calorimeter is a device used to measure the amount of heat transferred to or from a substance during a chemical or physical reaction. It is commonly used in the classroom setting for experiments that involve the transfer of heat energy. The basic design of a calorimeter consists of an insulated container that holds the substance and a thermometer or temperature probe to measure the temperature change of the substance.
The insulation helps to reduce heat loss to the surrounding environment, which makes the measurement of heat transfer more accurate. Calorimeters can be used to determine the specific heat capacity of a substance, to measure the heat of reaction in a chemical reaction, or to measure the heat transfer between two substances of different temperatures. The results of these experiments can be used to calculate the amount of energy transferred and to determine the energy changes that occur during chemical reactions.
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answer this question al six marks please my slays
Answer:
the driver need to stop before he drive
Explanation:
if he keep driving he will hit a car
which of jupiter's moons was found to have active volcanoes on it?
The stony moon of Jupiter With hundreds of eruptions, some of which are spouting lava fountains that are a few kilometers (or kilometers) high, Io is the solar system's largest volcanically active planet.
What makes Jupiter so distinctive?By far the biggest world in the solar system, Jupiter is more than times as large than all of the other planet put altogether. Jupiter is the sixth planet from our Sun. The swirls and patterns of Jupiter are really urea and water clouds floating in a helium- and hydrogen-rich atmosphere.
Jupiter has to be either hot or cool.The clouds tops are thought to be roughly -280 degrees Fahrenheit frigid. The overall temperature of Mars is -238 degrees Fahrenheit. Jupiter's pole is only little more than 3 degrees inclined, therefore
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How to convert degrees Fahrenheit to degrees Celsius?
Add five to this number. The outcome is divided by nine. Consider the following scenario: You want to know whatever the temperature would be in degree Celsius at 80 degrees Fahrenheit.
How do you convert a measurement from Fahrenheit to Celsius?
Converting a current temperature from the Order of 0.1 to a Celsius scale is known as the Fahrenheit to Celsius conversion. The formula for the connection among Celsius and Celsius is °Cc = (°F - 32) 5/9, where C stands for the number in Celsius and D e stands for the value in Fahrenheit.
What does 0 Celsius translate to in Fahrenheit?
conversion formula for Celsius to Fahrenheit. 32 degrees Fahrenheit is the same as zero degrees Celsius.The temperature T is equivalent to the temperature in degrees Fahrenheit (°F).
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A turntable that is initially at rest is set in motion with a constant angular acceleration.
A turntable that is initially at rest is set in motion with a constant angular acceleration a (alpha). What is the angular velocity of the turntable after it has made one complete revolution?
4√π.a
About accelerationIn physics, acceleration is the change in velocity within a certain unit of time. Generally, acceleration is observed as an object moving faster or slower. But acceleration is a vector quantity, so acceleration has both magnitude and direction. In other words, an object that is turning (eg a car that is still turning) also has acceleration too.
The SI unit of acceleration is m/s2. The acceleration dimension is L T-2.
In classical mechanics, the acceleration of an object with mass remains directly proportional to the resulting force acting on it and inversely proportional to its mass.
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an object of mass 1 kg that is moving in a straight line on a level surface slows down from 4 m/s to rest. what is the net work done on the object?
Net work done on the object -16J.
Net work done on the object = Force x Distance
Force = mass x acceleration = 1 kg x (-4 m/s) = -4 N
Distance = Change in velocity x time = (4 m/s - 0 m/s) x 1 s = 4 m
Net work done on the object = Force x Distance
= -4 N x 4 m
= -16 J
What is work done?
Work done is the amount of energy expended to move an object a certain distance. It is calculated by multiplying the force applied to the object by the distance it is moved. Work is measured in Joules (J).
Therefore, Net work done on the object -16J.
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i need help on this please answer rrght away!
An electron and a neutral carbon atom are floating alone and initially at rest in interstellar space a distance of 100 nm apart. The constant alpha for a carbon atom in the expression p_e = alpha E is about alpha = 2.0 times 10^-40 in SI units. What are the correct SI units for a? Explain physically why the electron will accelerate toward the carbon atom and calculate the magnitude of its initial acceleration. By the time the separation between the two has decreased to 10 nm, by what factor has the electron's acceleration increased? Imagine that two charged balls placed some distance apart strongly attract each other Now
SI unit is m^2C^2/j, the electron will accelerate because of attractive electric force, electron's acceleration increased by a factor of 1/100.
The unit for alpha is m^2C^2/J, which represents the ratio of an electron's momentum to the electric field acting on it.
The electron will accelerate towards the carbon atom because of the attractive electric force between the negatively charged electron and the positively charged nucleus of the carbon atom. This force is given by Coulomb's law:
F = k x q1 x q2 / r^2, where k is the Coulomb constant, q1 and q2 are the magnitudes of the charges, and r is the distance between them.
The magnitude of the initial acceleration can be calculated using Newton's second law:
F = m x a, where m is the mass of the electron and a is its acceleration. Substituting the electric force from Coulomb's law gives:
= a
= F / m
= k x q1 x q2 / m x r^2
By the time the separation between the two has decreased to 10 nm, the acceleration of the electron has increased by a factor of (10 nm / 100 nm)^2 = 1/100.
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a 65- kg person is skiing down a hill. the skier’s speed at the bottom is 15 m/s. if the skier hits a snowdrift and stops in 0.30 s, (a) how far does she go into the drift? (b) with whay average force will she strike the drift?
If the skier hits a snowdrift and stops in 0.30 s, She would go into the drift to 2.25 m. The average force that she will strike the drift is 3250 N.
What is speed?The speed at which an object's location changes in any direction. The distance traveled in relation to the time it took to travel that distance is how speed is defined.
a = -15 / 0.3 = -50 m/s2
v2 - v02 = 2ax
- 152(-50)x == > x = 2.25 m
F = ma = 65 x 50 = 3250 N
Therefore, a. She would go into the drift to 2.25 m.
b. The average force that she will strike the drift is 3250 N.
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Three identical container P, Q and R are taken, and kept - one on the terrace of a tall building; another on the terrace of a horter building; and the third in an open pace. After a rain, which one will have the highet level of water, auming no overflow and no obtruction near the container?
The container kept on the terrace of the taller building will have the highest level of water.
What is atmospheric pressure ?The level of water in a container depends on atmospheric pressure, and the atmospheric pressure decreases with height.
Atmospheric pressure, also known as air pressure, is the force exerted by the weight of air molecules in the atmosphere. It is measured in units of force per unit of area, typically in kilopascals (kPa) or pounds per square inch (psi).
Atmospheric pressure decreases with increasing altitude, as there are fewer air molecules above the earth's surface. At sea level, the average atmospheric pressure is approximately 101.3 kPa (14.7 psi), while at high elevations it can be significantly lower.
The taller building is higher up, so the atmospheric pressure on its terrace is lower than that at ground level, resulting in a lower water level in the container kept there.
The water level in the container kept on the terrace of the shorter building and the one kept in an open space will be at the same height, as they are both at ground level and have the same atmospheric pressure.
Therefore, The container kept on the terrace of the taller building will have the highest level of water.
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What is the speed of the lander just before it touches the surface? the acceleration due to gravity on the moon is 1. 6 m/s2.
The speed of the lander just before it touches the surface will be the highest it has been during its descent.
The speed of the lander just before it touches the surface can be calculated using the equation: v = √(2gh), where g is the acceleration due to gravity on the moon (1.6 m/s^2), h is the height above the surface, and v is the velocity.
Assuming h is a constant value, the velocity of the lander can be calculated as the square root of two times the acceleration due to gravity multiplied by the height. This equation is known as the equation of motion and is used to calculate the velocity of an object in free fall. It is important to note that the velocity will increase as the height decreases, so the speed of the lander just before it touches the surface will be the highest it has been during its descent.
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A string is stretched between two clamps held 4.02 m apart. The string is made to oscillate at its third harmonic frequency.
Calculate the distance in m between two adjacent nodes to.
The distance between two adjacent nodes of the wave is determined as 8.04 m.
What is the distance between two adjacent node?
The distance between two adjacent nodes of the wave is calculated by applying the following formula;
Node to Node = λ/2
Node to Node = length of the string = 4.02 m
where;
λ is the wavelength of the wave or the distance between two adjacent nodesThe distance between two adjacent nodes of the wave is calculated as;
λ/2 = L
λ = 2L
λ = ( 2 ) x ( 4.02 m )
λ = 8.04 m
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how many degrees are there on both the celsius and kelvin temperature scales, between the normal freezing and boiling points of water?
On both the the celsius and kelvin temperature scales, 100 degrees is the difference between normal freezing and boiling points of water.
Boiling point
The temperature at which a fluid bubbles and goes to fume for example significantly alters its state at climatic strain is known as the edge of boiling over of the fluid.
Bubbling is a mass peculiarity.Edge of boiling over of waterThe edge of boiling over of water is the edge of boiling over of water fluctuates with air pressure.We know that on celsius scale,freezing temperature of water is =0°C
and,boiling point of water is =100°C
Similarly,freezing point of water in kelvin scale=273K
and boiling point of water in kelvin scale=373K.
So,difference between normal freezing point of water and boiling point of water=100-0=100°C
Hence,difference is of 100°C in both kelvin and degree scale.
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a 100-cm -thick layer of oil floats on a 170-cm -thick layer of water. what is the pressure at the bottom of the water layer?
The pressure at the bottom of the 170-cm-thick water layer is 17,000 Pa.
The pressure at the bottom of the water layer can be calculated using the formula for pressure due to a fluid column:
P = ρgh
where P is the pressure, ρ is the density of the fluid, g is the acceleration due to gravity, and h is the height of the fluid column.
Since water has a density of about 1000 kg/m^3, the pressure at the bottom of the 170-cm-thick water layer is given by:
P = 1000 kg/m^3 * 9.8 m/s^2 * (170 cm / 100 cm/m)
P = 17,000 Pa
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two point charges of 30 μc each are 4 cm apart. what is the electric field at the midpoint between the two charges?
The electric field at the midpoint between the two charges each of 30 μC, is zero.
Charge q₁ = +30 μC
Charge q₂ = +30 μC
Distance between both the charges, d = 4 cm
Midpoint will be 2 cm from each charge. so r = 2 cm
We know the electric filed produced by a charge, at a distance of d is formulated as, E = q/(4πε₀r²)
Where q is the charge, ε₀ is the constant of permittivity of vacuum.
Let 1/(4πε₀) = k, then E = kq/r²
Electric field due to first charge at 2 cm from it, E₁ = (k × 30)/2²
Similarly, electric field due to second charge at 2 cm from it, E₂ = (k × 30)/2²
E = E₁ - E₂
E = (k × 30)/2² - (k × 30)/2²
E = 0
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a bicyclist moving at a speed of 15.0 m/s rounds a bend with a radius of 28.0 m. what is the centripetal acceleration of the cyclist?
Centripetal acceleration of the cyclist is 8.04 m/s^2, while the moving speed of the cyclist is 15.0m/s.
The centripetal acceleration of an object moving in a circle with a radius "r" and velocity "v" can be calculated using the following formula:
a = v^2 / r
where "a" is the centripetal acceleration.
Given the speed of the cyclist
(v) = 15.0 m/s and
the radius of the bend (r) = 28.0 m,
the centripetal acceleration can be calculated as follows:
= a
= v^2 / r
= (15.0 m/s)^2 / 28.0 m
= 225 m^2/s^2 / 28 m
= 8.04 m/s^2
So the centripetal acceleration of the cyclist is 8.04 m/s^2.
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the pressure of the helium inside a toy balloon is 1250 mm hg. what is this pressure in kpa?
The pressure of the helium inside a toy balloon in kpa is calculated to be 166770 kPa.
Pressure of helium = 1250 mm Hg
Converting into m Hg, we have,
p he = 1250/1000 = 1.25 m Hg
From the physical properties of Hg, we know,
ρ Hg = 13.6 g/cm³ = 13600 kg/m³
Gravity of the earth = 9.8 m/s²
The helium pressure inside a toy balloon is, in kPa,
p he = ρ g h = 13600 ×9.81 × 1.25 = 166770 kPa
Thus, the required pressure of the helium inside a toy balloon in kpa is calculated to be 166770 kPa.
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