A helium balloon (in the shape of a sphere) has radius 7.25 m .
For the density of air, please use 1.29 kg/m^3, and for Helium, use .179 kg/m^3
How much additional mass (payload) could this balloon lift? You should assume the balloon's skin, plus other parts of the balloon's structure have a total mass of 920 kg . Note however that this number does NOT yet include the mass of the helium filling the balloon, which you will need to account for!

Answer:

D - Water

Explanation:

Answer: We get chemical energy from foods, which we use to run about, and move and talk  kinetic and sound energy  Chemical energies are stored in fuels which we burn to release thermal energy - this is one way of making electricity, see Electricity for more information



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Answer:

r = 3 m

Explanation:

Given that,

Charge, \(q=1\ mu C\)

Electric field at a point, \(E=1000\ N/C\)

We need to find the distance away from it. We know that electric field at point r is given by :

\(E=\dfrac{kq}{r^2}\\\\r=\sqrt{\dfrac{kq}{E}} \\\\r=\sqrt{\dfrac{9\times 10^9\times 10^{-6}}{1000}} \\\\r=3\ m\)

So, the required distance is 3 m.

I just hope this pic will help you

Answer:C or B

Explanation:

Gases easily compress when pressure is applied, but liquids don't. So, option A.

The attracting and repellent forces that develop between the molecules of a substance are known as intermolecular forces.

Here,

The interactions between the individual molecules of a substance are mediated by the intermolecular forces. The majority of the physical and chemical features of matter are caused by intermolecular forces.

Compared to gases, which have relatively far-apart particles, liquids exhibit higher intermolecular forces due of the near proximity of their particles. The greater the intermolecular forces get as they get closer to one another since they are electrostatic in nature.

There is no force between particles in a gas. Particles have no restrictions on their movement. The container's walls colliding with one another provide the only forces that exist. which rely on the quantity of gas (number of collisions) and the momentum of each collision respectively. The pressure is nearly consistent throughout the entire mass of the gas because the molecules are free to move.

There is no compression of liquids. Since their volume is constant, changing pressure has no effect on it.

Hence,

Gases easily compress when pressure is applied, but liquids don't. So, option A.

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Answer:

\(m=14kg\)

Explanation:

Hello.

In this case, since the force is defined in terms of the mass and acceleration by:

\(F=m*a\)

We can easily compute the mass by solving for it:

\(m=\frac{F}{a}\)

Whereas the force is 182 N (kg*m/s²) and the acceleration is 13 m/s², therefore, we obtain:

\(m=\frac{182kg\frac{m}{s^2} }{13\frac{m}{s^2}}\\\\m=14kg\)

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The tax rate you will pay is displayed in tax brackets for each category of taxable income.

Thus, For instance, in 2022, the first $10,275 of your taxable income is subject to the lowest tax rate of 10% if you are single.

Up until the maximum amount of your taxable income, the following portion of your income is taxed at a rate of 12%.

As taxable income rises, the tax rate rises under the progressive tax system. Overall, this has the result that taxpayers with higher incomes often pay a greater rate of income tax than taxpayers with lower incomes.

Thus, The tax rate you will pay is displayed in tax brackets for each category of taxable income.

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Answer:

Answer is down below…

Explanation:

A force does not always bring a change in motion of an object. For instance, if you push the walls of the room with your hands, the walls do not move. Sometimes force changes the shape and size of an object without any change in the state of motion of an object. Q.

The total distance is 105 kilometers and the total displacement is 15 kilometers east. Option C

To calculate the total distance, we add the distances traveled in each leg of the journey: 60 kilometers (from A to B) + 45 kilometers (from B back to A) = 105 kilometers.

However, displacement refers to the change in position of an object in a straight line from its starting point to its ending point. In this case, since the boat starts and ends at the same point (A), the total displacement is zero.

Hence The total distance is 105 kilometers and the total displacement is 15 kilometers east.

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Answer:

If a runner exerts 350 J of work to generate 175 W of power, it took the runner 2 seconds to do the work.

Explanation:

Power is defined as the speed with which a job is done. In other words, power is a given amount of work done in a given unit of time. That is, it is the amount of work per unit of time that some object or system produces.

Its expression is:

\(P=\frac{W}{t}\)

where:

In this case:

Replacing:

\(175 W=\frac{350 J}{t}\)

and solving you get:

\(t=\frac{350 J}{175 W}\)

t= 2 s

If a runner exerts 350 J of work to generate 175 W of power, it took the runner 2 seconds to do the work.

Answer:

C. Sleep Apnea

Explanation:

Sleep Apnea is when someone who snores and stops breathing while sleeping

Someone who snorts and stop breathing during sleep may be suffering from Sleep Apnea. Hence, option (c) is correct.

Breathing repeatedly stops and begins while you sleep, which is a frequent symptom of sleep apnea. Your body may not receive enough oxygen as a result.

There are two different forms of sleep apnea.

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Answer:

Bob's angular speed is the same as that of lily

Explanation:

Because for a carousel the angular speed remains the same since velocity at center and edge are the same

Answer: B

Explanation:

Answer:

the ultimate way to overcome the Earth's gravity is to leave the Earth's gravitational influence altogether. The force of gravity reduces in inverse proportion to the square of the distance from the centre of the Earth.

Explanation:

Answer:

its hopping

Explanation:

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Answer:

hopping YEAHhhhhhhhhhhhhhhhhhh

Answer:

7a. CO2 => carbon dioxide

b. H2O => water

8. The mass of carbon dioxide, CO2 plus the mass of water, H2O is equal to the mass of sugar, C6H12O6 plus the mass of oxygen, O2.

Explanation:

7. Selecting the names of the reactant.

6CO2 + 6H2O —> C6H12O6 + 6O2

From the above equation, the reactants are: CO2 and H2O

Thus, the names of the reactants are:

a. CO2 => carbon dioxide

b. H2O => water

8. Determination of masses of the CO2, H2O, C6H12O6 and O2 from the balanced equation. This can be obtained as follow:

6CO2 + 6H2O —> C6H12O6 + 6O2

Molar mass of CO2 = 12 + (2x16) = 44 g/mol

Mass of CO2 from the balanced equation = 6 x 44 = 264 g

Molar mass of H2O = (2x1) + 16 = 18 g/mol

Mass of H2O from the balanced equation = 6 x 18 = 108 g

Molar mass of C6H12O6 = (12x6) + (12x1) + (16x6) = 72 + 12 + 96 = 180 g/mol

Mass of C6H12O6 from the balanced equation = 1 x 180 = 180 g

Molar mass of O2 = 16x2 = 32 g/mol

Mass of O2 from the balanced equation = 6 x 32 = 192 g

Summary:

Mass of Reactant:

CO2 = 264 g

H2O = 108 g

Total = 372 g

Mass of Product:

C6H12O6 = 180 g

O2 = 192 g

Total = 372 g

From the above calculations,

The mass of carbon dioxide, CO2 plus the mass of water, H2O is equal to the mass of sugar, C6H12O6 plus the mass of oxygen, O2.

Answer:

Albert

Explanation:

The ML rule has a very low error probability for these values of m1 and m0.

The ML rule for an optical on-off keyed system can be derived by using the Bayes' theorem. The ML rule is given by:

P(Y|1)P(1)/P(Y) > P(Y|0)P(0)/P(Y)

Since 0 and 1 are equally likely to be sent, P(1) = P(0) = 0.5. Therefore, the ML rule simplifies to:

P(Y|1) > P(Y|0)

The conditional probabilities P(Y|1) and P(Y|0) are given by the Poisson distribution:

P(Y|1) = (m1^Y * e^(-m1))/Y!

P(Y|0) = (m0^Y * e^(-m0))/Y!

Substituting these expressions into the ML rule and simplifying, we get:

(m1/m0)^Y > e^(m0-m1)

Taking the natural logarithm of both sides, we get:

Y > (m0-m1)/ln(m1/m0)

This is the form of the ML rule. For m1 = 100 and m0 = 10, the ML rule becomes:

Y > 52.02

The conditional error probabilities Pe∣i, i=0, 1 for the ML rule can be found by integrating the Poisson distribution over the appropriate range of Y. For i = 0, the conditional error probability is given by:

Pe∣0 = ∫_52.02^∞ (m0^Y * e^(-m0))/Y! dY

For i = 1, the conditional error probability is given by:

Pe∣1 = ∫_0^52.02 (m1^Y * e^(-m1))/Y! dY

These integrals can be evaluated numerically to find the conditional error probabilities. For m1 = 100 and m0 = 10, the conditional error probabilities are:

Pe∣0 = 1.9287498e-22

Pe∣1 = 0.0

Therefore, the ML rule has a very low error probability for these values of m1 and m0.

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The electron number cannot be used instead because electrons can be removed from or added to an atom (option C)

The element of an atom is determined by its proton count, while the electron count can exhibit variability. Take, for instance, a sodium atom, which encompasses 11 protons and 11 electrons. However, it has the capacity to relinquish one electron, transforming into a sodium ion housing only 10 electrons.

This occurs due to the relatively loose binding of electrons to the nucleus, enabling their removal through the influence of an electric field or alternative mechanisms.

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Torque is a measure of the turning force applied to an object about a rotational axis. It is calculated as the product of the force applied to the object and the distance from the axis of rotation at which the force is applied.

Use the equation slope = mod to calculate the unknown mass (mo) for parcels A and C, setting d = 1.0 m, and parcels G and H, setting d = 1.5 m.

Record all data, tables, and four graphs for analysis.

The experiment demonstrates the application of torque in determining unknown masses and provides valuable insights into the concept of torque in physics.

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Answer:30 km/hr2 is the exal

Explanation:

Nuclear power plants have backup generators to ensure that essential equipment, such as cooling systems, can continue to function in the event of a power outage or other emergency.

Nuclear power plants rely on a constant supply of electricity to operate the equipment that controls the nuclear reaction and cools the reactor. If the power supply is interrupted, the reactor can overheat and damage can occur. Backup generators provide power to essential equipment, such as cooling systems, that keep the reactor and spent fuel pools from overheating.  If the backup generators fail, there is a risk of a nuclear accident, as was seen in the disaster in 2011, where the failure of backup generators led to a loss of cooling and a major nuclear incident.

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Answer:

the intercept is the orgin (0,0)

Answer:

\(Va-Vb=168KV\)

Explanation:

From the question we are told that

Two points charge of 4\mu C and 2\mu C

Generally we find the  Va and Vb individually to find there difference

Given a rectangle with two equal sides each,Assume lengths for bot sides

Length L=0.3

Breath B=0.4

Diagonal D=\(\sqrt{0.3^2+0.4^2} =0.5\)

at  opposite sides

Mathematically Va can represented as

\(Va =k(\frac{4*10^_-_6}{0.3} +\frac{-2*10^_-_6}{0.5} )\)

\(Va =9*10^9(\frac{4*10^_-_6}{0.3} +\frac{-2*10^_-_6}{0.5} )\)

\(Va =9*10^9(0.00001333333-0.000004} )\)

\(Va =84000V\)

\(Va =84KV\)

Mathematically Vb is  represented as

\(Va =k(\frac{-4*10^_-_6}{0.3} +\frac{2*10^_-_6}{0.5} )\)

\(Va =9*10^9(\frac{-4*10^_-_6}{0.3} +\frac{+2*10^_-_6}{0.5} )\)

\(Va =9*10^9(-0.00001333333+0.000004} )\)

\(Va =-84000V\)

\(Va =-84KV\)

Therefore

\(Va-Vb=84-(-84)\\Va-Vb=84+84\\Va-Vb=168KV\)

Answer:

Explanation:

1) P = 60(9.8)/0.00008 = 7,350,000 N/m² = 7.4 MPa

If she stands with all her weight on only one heel. Rather hard to do on a surface of a trampoline, and well above the strength limit for this one.

2) P = 4000(9.8)/0.1 = 392,000 N/m² = 390 KPa

Can an elephant stand on only one foot? If the elephant keeps at least two feet on the surface at all times, the pressure would be half of that and would be within the strength limits of the trampoline.

i) The initial deceleration of the car is -1.6 m/s² and  the time taken is 5 seconds

ii) The final deceleration is -1 m/s²

iii) The total dispalcement = 1016 m

The initial deceleration of the car is given by the formula below:

v² = u² + 2as

where;

Solving for a;

12² = 20² + 2 * a * 80

a = -1.6 m/s²

Time taken, t = v - u / a

t = 12 - 20 / (-1.6)

t = 5 seconds

Final deceleration:

a = v - u / t

a = 0 - 12 / 12

a = -1 m/s²

iii) Displacement at constant velocity = 12 * 1 * 60

Displacement at constant velocity = 720 m

Final displacement, s = ut + 0.5at²

s = 12 * 12 + 0.5 * 1 * 12²

s = 216 m

Total dispalcement = 80 + 720 + 216

Total dispalcement = 1016 m

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The approximate centripetal force on an astronaut of mass 80Kg if the centrifuge rotates once every 2s is 3.94 KN

ac = v² / r

v = 2 π r / T

ac = Centripetal acceleration

v = Linear / Tangential velocity

T = Time period

r = Radius

r = 5 m

T = 2 s

v = 2 * 3.14 * 5 / 2

v = 15.7 m / s

ac = 15.7 * 15.7 / 5

ac = 49.298 m / s²

Fc = m ac

m = Mass

m = 80 kg

Fc = 80 * 49.298

Fc = 3943.8 N

Fc = 3.94 KN

Therefore, the approximate centripetal force on the astronaut is 3.94 KN

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An Particle a has Weston practical.

The resistance to motion of one object moving in relation to another is known as friction. It is not regarded as a fundamental force like gravity or electromagnetic, according to the International Journal of Parallel, Emergent and Distributed Systems(opens in new tab).

According to the book Soil Mechanics(opens in new tab), scientists started putting together the laws governing friction in the 1400s.

However, because the interactions are so complex, characterizing the force of friction in various circumstances typically requires experiments and can't be derived from equations or laws alone. There are numerous exceptions to every frictional general rule.

Therefore, An Particle a has Weston practical.

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