How to do calculate this the error? What are the rules?(Mark scheme Answer is B)

The volume of the gas once it reaches the surface of water is 2 liters.

The volume of the air in balloon at depth of 100ft (30m) is 500ml.

The pressure at this point is 4 atm.

Assuming that the balloon have no compression by rubber of balloon the volume of air at the water surface is V.

The pressure at the surface of water is 1 atms.

As we know, from the ideal gas equation,

PV = nRT

Where,

P is the Pressure of gas,

V is the volume of the gas,

n is the number of moles,

R is the gas constant whose value is 0.082057 L atm mol-1 K-1,

T is the temperature.

Assuming that the temperature is constant,

We know,

PV = nRT

All quantities on the right side are constants,

So, we can write,

P₁V₁ = P₂V₂

Putting all the the values,

4(0.5) = 1V₂

V₂ = 2 Liters.

The volume of the air at the surface is 2 liters.

1 liter = 0.001 m

Hence,

2 liters = 0.002 m³

So the volume of air at the surface is 0.002m³.

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The magnetic dipole moment of the current loop is  0.025 Am².

The magnetic torque on the loop is 2.5 x 10⁻⁴  Nm.

The magnetic dipole moment of an object, is the measure of the object's tendency to align with a magnetic field.

Mathematically, magnetic dipole moment is given as;

μ = NIA

where;

μ = (1) x (25 A) x (0.001 m²)

μ = 0.025 Am²

The magnetic torque on the loop is calculated as follows;

τ = μB

where;

B = √(0.002² + 0.006² + 0.008²)

B = 0.01 T

τ = μB

τ =  0.025 Am² x 0.01 T

τ = 2.5 x 10⁻⁴  Nm

Thus, the magnetic dipole moment of the current loop is determined from the current and area of the loop while the magnetic torque on the loop is determined from the magnetic dipole moment.

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Answer:

Textbook

Explanation:

Pretty obvious thi :v

Answer:

OA

Explanation:

Text books are often reviewed by experts hence, is likely to be biased.

ANSWER:

2167.68 kg*m^2

STEP-BY-STEP EXPLANATION:

Given:

mr = 8 kg

L = 6 m

ms = 36.25 kg

R = 1.5 m

Moment of inertia of sphere about its center is:

Using paraller theorem, moment of inertia of shpere about end of rop is:

Therefore:

Replacing:

The moment of inertia is 2167.68 kg*m^2

The final stage of reduction of pressure in a regulator is to 500 PSIG.

A gas pressure regulator can be defined as a mechanical device that is designed and developed to ensure that a controlled amount of gas is supplied from a gas cylinder (source).

This ultimately implies that, a gas pressure regulator is required on a gas cylinder in order to reduce very high (unusable) pressure within the gas cylinder to a safer and usable delivery pressure.

In Science, a two-stage gas pressure regulator is designed and developed to lower very high (unusable) pressure in two (2) stages.

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Simpson will it take 112 / 17 km to drive 560 km on a perfectly straight highway.

You can replace this computation with d = rt, which stands for "distance equals rate times time." To calculate speed or rate, use the speed formula, s = d/t, which asserts that speed is equal to distance divided by time.

The difference between speed and velocity is the amount of distance an object covers in a given amount of time and in a certain direction. Speed is a scalar quantity while velocity is a vector.

We know that:

v = 85

d = 560

Substitute

v = 85

d = 560 into formula d = v x t  :

560 = 85t

Cross out the common factor: 112 / 17 km

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The impulse of the car after hitting is 98860.8 kg.m/s

In physics, the term "impulse" is used to characterize or measure the impact of force operating gradually to alter an object's motion. It is often stated in Newton-seconds or kilograms per second and is denoted by the symbol J.

            J = m ( v-u)

where, m = 2168 kg

           u = 50 m/s

           v = 4.4 m/s

J = 2168 ( 4.4 - 50)

J = 2168(45.6)

J = 98860.8 kg.m/s

since the final velocity is decreasing the impulse is a vector term thus a negative sign will also be included in this.

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Given

Hears the echo at , t=0.250 s

Speed pf sound is v=340 m/s

To find

The distance from the wall

Explanation

let her distance from the wall be d.

When she hears the echo, the sound has travelled the same distance twice

So

Conclusion

The distance of the wall from her is 42.5 m

The speed of the continent is found to be 7.68 centimeters per hour when 1920000000cm is divided by 250000000years.

The distance travelled by the continent is 1920000000cm.

The time taken by the continent to complete its path is 250000000.

The speed S of the body,

S = D/T

Where,

D is the distance travelled by the body,

T is the time taken by the body to cover that distance.

The speed S of the continent is,

S = D/T

S = 1920000000cm/250000000year

S = 7.68 cm/year

Hence, the speed of the continent is 7.68 centimeters per year.

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Therefore,

Finally,

A spherical specimen of the mineral chalcopyrite measures 3.9 cm in diameter and has a mass of 129.67 g, its specific gravity is 4.17g/cm³

The ratio of a substance's density to that of a reference substance is its specific gravity, also known as relative density.

Water, which has a density of 1.0 kg/litre at 4 °C (39.2 °F), serves as the standard of comparison for solids and liquids (62.4 pounds per cubic foot).

Dry air, which is frequently used as a comparison point for gases, has a density of 1.29 grams per litre (1.29 ounces per cubic foot) under what are known as "standard conditions" (a temperature of 0 °C and a pressure of 1 standard atmosphere).

As an illustration, the specific gravity of liquid mercury is 13.6 due to its density of 13.6 kg per litre. The density of the gas carbon dioxide, which is 1.976 grams per liter under ideal conditions, translates into a specific gravity of 1.53 (= 1.976/1.29).

The formula for specific gravity is given by

specific gravity = density of the object / density of the water

Here given that a spherical specimen of the mineral chalcopyrite measures 3.9 cm in diameter and has a mass of 129.67 g

Then its volume is

Volume of sphere = [tex]{\frac {4}{3}}\pi r^{3}[/tex]

Substituting the values we get

V =  [tex]{\frac {4}{3}}\pi (\frac{3.9}{2} )^{3}[/tex]

   = 31.06 cm³

Density = Mass/Volume

Density of mineral chalcopyrite = 129.67g / 31.06 cm³

= 4.17 g/cm³

Now, we can finally calculate specific gravity

specific gravity = 4.17 g/cm³ / 1g/cm³                  (Density of water is 1m/1V)

= 4.17g/cm³

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According to the research, the correct term to complete the statement is collect. The outer ear collects sound waves.

It is a structure that captures or collects sound or sound vibrations before channeling them to the middle ear.

In this sense, it is made up of the pinna that projects from the side of the head and the external auditory meatus that automatically amplifies sounds that pass inward to the tympanic membrane.

Therefore, we can conclude that the outer ear captures sound waves and conducts them to the middle ear, thus the correct term is collect.

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Given:

The pressure inside the tank, P=74000 Pa

The area of the top of the tank, A=0.38 m²

To find:

The force exerted on the top of the tank.

Explanation:

The pressure can be described as the force exerted per unit area.

Thus the pressure inside the tank is given by,

Where F is the force exerted on the top of the tank.

On substituting the known values,

Final answer:

Thus the force exerted on the top of the tank is 28120 N

Answer:7.8 M/s

Explanation:

The mass of the given iron sphere of diameter 0.5 m is 510.9 kg

Density of the iron sphere = 7890 kg/m³

Diameter of the iron sphere = 0.5 m

Radius of the iron sphere = 0.25m

The formula to find the mass of the iron sphere is

                                ρ = m / v

where ρ is the density

          m is the mass

          v is the volume.

So , to find the mass , we need to know the volume of the sphere

Volume of the sphere = 4/3 πr³

Let us substitute the value of r in the above equation,

                    V = 4/3 x 3.14 x (0.25)³

                        = 4/3 x 3.14 x 0.0156

                        = 0.196/3

                  V  = 0.065 m³

So , now let us find the mass of the given sphere

                 ρ = m / v

                m = ρv

                m = 7860 x 0.065

               m = 510.9 kg

Therefore , the mass of the given iron sphere is 510.9 kg

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Option d i.e; Slope at the point on the plot corresponding to t1 corresponds to disk's angular velocity at any given instant t1.

The angular velocity (w), a vector quantity in uniform circular motion, is determined by dividing the angular displacement (Δ), also a vector quantity, by the change in time (Δt). Speed is equal to |w|R and is calculated by dividing the arc length travelled (S) by the change in time (Δt).

Examples of angular velocity include a roulette ball on a wheel, a race car travelling in a circle, and a Ferris wheel. In addition, the object's angular displacement with respect to time is represented by the angular velocity of the object.

Because it is practical, angular velocity is perpendicular. Because all they are is a magnitude and a direction, a vector cannot be curved. In order to represent the rotational direction, we use the direction perpendicular to the plane.

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Given that hotter blackbodies produce more energy than cooler blackbodies,  cooler red giants have much higher luminosities than much hotter white dwarfs.

The hotter blackbodies emits more light as compared to the cooler blackbodies over all the wavelength. A blackbody emits light over all wavelength. the red giant is a star , hydrogen is fused to helium core to stat the fusion reactions. this hydrogen fusion caused the star to expand. the sun becomes red giant it will swell up to size of earth orbit.  This gives a red color and make red giant much hotter. while the white dwarf comes after the red giant . white dwarf is also very hot but it is not hot enough to star fusion reaction in carbon and oxygen.

Thus, Given that hotter blackbodies produce more energy than cooler blackbodies,  cooler red giants have much higher luminosities than much hotter white dwarfs.

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The most frequent HVAC crises are gas leaks, clogged drain lines, electrical problems, refrigerant leaks, and problems with ventilation.

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1.

The number of the carbon atom is five. All the carbon atom is single-bonded.

The formula name of the above is Pentane.

The number of the carbon atom is four. All the carbon atom is single-bonded except one triple bond at the first place.

The formula name of the above is 1-butyne.

Answer:

12C

Explanation:

q = It

where q is the charge in coloumbs (c)

I is the current in amperes (A)

t is the time in seconds (s)

q = 0.2× 60 (1 minute is 60seconds)

q= 12C

Answer:

At the surface it is defined by 9.80665 m/s2.

A sample descriptive essay about the basic steps of the scientific method is given below:

When a person is testing a hypothesis, it is important that he collects data and then makes an analysis of it, and puts it through a controlled experiment at the lab.

Next, he would have to peer-review the results of the experiments and when this is confirmed, it becomes a theory,

This refers to the process of systematic observation that is used to come to a conclusion in a scientific investigation.

Hence, we can see that the descriptive essay about the scientific method is given above,.

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Given that:

A) Energy,

The time is

B) Energy,

and time

C) Energy

and time

We have to find the power for all three cases.

The formula to calculate power is

The power transferred by Bob will be

The power transferred by Carl will be

The power transferred by Alan will be

Thus, Alan exhibits more power.

The plow was an important invention for the Sumerian civilization because it made it easier for farmers to prepare land for farming.

The plow made farming more efficient for the Sumerians, as people no longer had to waste time planting food by hand. The cart allowed people to carry goods back and forth from different civilizations in a much easier way as people did not have to carry the goods on their backs.

It is estimated that the ancient Sumerians invented the plow. The plow was designed to utilize domestic animals as a means of easing the workload on farmers. Oxen were harnessed to a wooden plow and pulled it through the fields to loosen the soil for easier planting of crops.

Plow, also spelled plough, most important agricultural implement since the beginning of history, used to turn and break up soil, to bury crop residues, and to help control weeds.

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ANSWER

A. The object has a negative velocity

EXPLANATION

We want to describe the slope of a position-time graph that is negative.

If the slope of a position-time graph is negative, it implies that the velocity is also negative. In other words, as time increases, the velocity also decreases.

As velocity decreases, it implies that the acceleration also decreases.

Therefore, we have that the acceleration of the object is negative.

The answer is option A.

The work done on the asteroid by the constant force is 4.06 × 10¹¹ joules and the force experienced by the asteroid is 1.89 × 10⁵ newtons

what is work energy theorem?

work energy theorem is an important phenomenon in physics which states that the change in kinetic energy is equal to the work done by the object.

This law is basic part of conservation of energy.

what is newtons law of motion?

Newton's laws of motion are three basic laws of classical mechanics that describe the relationship between the motion of an object and the forces acting on it. These laws can be paraphrased as follows: A body remains at rest, or in motion at a constant speed in a straight line, unless acted upon by a force.

given:

mass of the asteroid = 5.8 x 10⁴ kg

initial speed of the asteroid v₁ = 6800m/s

final speed of the asteroid v₂ = 5600 m/s

displacement of the asteroid = 2 × 10⁶ meters

a)

using work energy theorem for the asteroid we get,

work done = change in kinetic energy

work done = 1/2 × m × (v₂) ² - 1/2 × m × (v₁) ²

work done by the force on the asteroid is = 1/2 × 5.8 x 10⁴ (1.4 × 10⁷)

work done by the force on the asteroid is = 4.06 × 10¹¹ joules

b)

first, we will have to find the acceleration of the asteroid,

using newtons third law of motion we get,

a = 14/4

a = 3.5 m/s²

therefore, the force can be calculated using relation f = m × a

here,

m is mass

a is acceleration

therefore, the force on the asteroid is = 5.8 x 10⁴ × 3.5

the force on the asteroid is = 1.89 × 10⁵ newtons

therefore, the work done on the asteroid by the constant force is 4.06 × 10¹¹ joules and the force experienced by the asteroid is 1.89 × 10⁵ newtons

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Answer:

adjacent flat spots on his skin

Answer:

You didn't provide answer choices but I'd assume it's pressure.

The density of water is,

The density of mercury is,

The relative density of mercury is the density of mercury concerning the density of water.

Thus, the relative density of mercury is,

Hence, option A is the correct answer.