The Maxwell speed distribution (a) Verify from the Maxwell speed distribution that the most likely speed of a molecule is √2kT/m. - (b) Use a computer to plot the Maxwell speed distribution for nitrogen molecules at T 300 K and T 600 K. Plot both graphs on the same axes, and label the axes values.

Answer:

(1) 10⁻⁴m = 0.0001m = 0.1mm

Explanation:

To be able to solve let's analyze each of the possible answers, let's start with:

(2) 10⁻²m = 0.01m = 1cm

This is not possible since a sheet cannot have one centimeter of thickness.

(3) 10°m = 1m We must remember that any number raised to zero is equal to 1

This is not possible since a sheet cannot have one meter of thickness.

(4) 10²m = 100m

This is not possible since a sheet cannot have one hundred meters of thickness.

(1) 10⁻⁴m = 0.0001m = 0.1mm

This is the answer, since a sheet of paper can be less than a millimeter thick.

Answer:

B 23m/s

Explanation:

From the above information we get,

Initial velocity= 3m/s

Acceleration by gravity = 10 m/s2 (approx)

Time taken =2 seconds

v=u+at (First Equation Of Motion)

v= 3 + 10 × 2

v= 23 m/s

Answer:

The length at the final temperature is 11.7 cm.

Explanation:

We need to use the thermal expansion equation:

\(\Delta L=\alpha L_{0}\Delta T\)

Where:

So, we have:

\(L_{f}-L_{0}=\alpha L_{0}(T_{f}-T_{0})\)

\(L_{f}=L_{0}+\alpha L_{0}(T_{f}-T_{0})\)

\(L_{f}=0.115+(12.5*10^{-6})(0.115)(1221-22)\)

\(L_{f}=0.117\: m\)

Therefore, the length at the final temperature is 11.7 cm.

I hope it helps you!

The ratio of Labib’s weight on the ground and on the top of Burj Khalifa is 4  [1 + x]²

Weight is the gravitational force of attraction of the earth on an object.

Suppose Labib is standing on the top of Burj Khalifa. If the ratio of the height of Burj khalifa and the radius of Earth is x.

Let

Now, the weight of Labib on the ground is the gravitational force of attraction of the earth on Labib when on the ground. It is given by

W = GMm/R² where

Also, Labib's weight at the top of Burj Khalifa is given by

W' = GMm/(R + h)² where

So, the ratio of Labib’s weight on the ground and on the top of Burj Khalifa is

W/W' = GMm/R² ÷ GMm/(R + h)²

= (R + h)²/R²

= [(R + h)/R]²

= [1 + h/R]²

= [1 + x]²

So, the ratio of the weight's is [1 + x]²

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The initial velocity is 24.9 m/s

The parameters given in the question are as follows;

Final velocity= -4.5 m/s

Time= 3 seconds

acceleration= -9.8

initial velocity= ?

The formula that can be used to calculate the initial velocity is

v= u + at

-4.5= u + (-9.8)(3)

-4.5= u + (-29.4)

-4.5= u - 29.4

u= -4.5+29.4

u= 24.9

Hence the initial velocity is 24.9 m/s

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Answer:

initial velocity is 24.9 m/s

Explanation:

Answer:

Heat pump

Refrigerators

Explanation:

Some devices like heat pump and refrigerators used transfers of thermal energy in a cool region to warm other region.

These types of devices used for transferring heat energy by thermal conduction method.

Answer:

The question is incomplete.

It asks you to use the formula W = F * D  (force times distance)

But the question only gives the work W in joules.

You would need to know  the weight of the object to get the distance moved or the distance moved to get weight if you are only given the work done.

Incidentally, the mechanical advantage in diagram is A is 1 whereas the mechanical advantage in B is 2.

So in B you would apply 1/2 the force as in A and would have to move the rope twice as far as in A to do the same amount of work.

Answer:

b. Italy

Explanation:

Italy had sided with germany and lost in world war 2

After the Potsdam conference, Germany was divided into four occupied zones: Great Britain in the northwest, France in the southwest, the United States in the south and the Soviet Union in the east.

europeuncedu

Charged particles are fundamental to the behavior of electric currents, electric circuits, and resistance. An electric current is the flow of charged particles, typically electrons, through a conductor.

The flow of charged particles generates an electric field that induces a potential difference, or voltage, across the conductor.Electric circuits are constructed by connecting conductors and electrical components, such as resistors, capacitors, and inductors, in a specific configuration. The arrangement of the components determines how the current flows through the circuit.

The flow of current through the circuit depends on the resistance offered by the components in the circuit and the potential difference across the circuit.Resistance is the property of a conductor that opposes the flow of current. The resistance of a conductor is proportional to the number of charged particles in the conductor, the length of the conductor, and the cross-sectional area of the conductor. The resistance can also be affected by the temperature of the conductor and its material properties.

In summary, charged particles are responsible for generating electric currents that flow through electrical circuits. The behavior of the currents is determined by the arrangement of the components in the circuit and the resistance offered by the conductors and components. Resistance is a fundamental property of a conductor that opposes the flow of charged particles and can be affected by various factors.

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Soles of boots that are designed to protect workers from electric shock are rated to pass a maximum rms current of 1.0 ma when connected across an 18000 v ac source. the minimum allowed resistance of the sole to protect workers from electric shock is 18,000,000 Ω.

To determine the minimum allowed resistance of the sole for worker protection from electric shock, we can use Ohm’s Law and the given specifications. Ohm’s Law states that the current passing through a resistor is equal to the voltage across it divided by its resistance.

In this case, the maximum rms (root mean square) current is given as 1.0 mA (milliamperes), and the voltage across the sole is 18,000 V (volts). We can convert the current to amperes by dividing by 1,000, which gives us 0.001 A.

Applying Ohm’s Law, we have:

I = V / R

0.01 A = 18,000 V / R

0.02

To find the minimum allowed resistance ®, we rearrange the equation:

R = V / I

R = 18,000 V / 0.001 A

R = 18,000,000 Ω (ohms)

Therefore, the minimum allowed resistance of the sole to protect workers from electric shock is 18,000,000 Ω.

This high resistance value is necessary to limit the current flow through the worker’s body to a safe level, preventing electric shock. The resistance of the sole helps to restrict the amount of current that can pass through it, reducing the risk of harm to the worker.

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Answer:

Granite is an excellent building material that provides some outstanding interior design opportunities whilst being incredibly sturdy and reliable. It has become one of the most popular building materials in modern construction, from kitchen surfaces through to paving slabs.You Can Expect Durability and Longevity. Firstly, marble is so popular around the world because of its durability in a wide variety of weather conditions. Structures that are over hundreds of years old made from marble are still standing to this day, and look as pristine as they day they were crafted.

Explanation:

Answer:

To find the distance the car traveled before coming to a halt, we can use the formula:

distance = initial velocity x time + (1/2) x acceleration x time^2

In this case, initial velocity is 15m/s², time is 5 seconds, and acceleration is -15m/s² (negative because the car is decelerating to a stop).

So, distance = 15m/s² x 5 seconds + (1/2) x -15m/s² x (5 seconds)^2

The distance the car traveled before coming to a halt is approximately 168.75 meters.

The observer hears a frequency of 638 Hz, calculated using the equation f' = f (v + u) / (v - us), where f = 550 Hz, v = 343 m/s (speed of sound), and u = 45 m/s (speed of the train).

The frequency heard by a stationary observer when a train approaches can be calculated using the Doppler effect equation. The Doppler effect is the change in frequency or wavelength of a wave in relation to an observer who is moving relative to the source of the wave.

In this case, the observer is stationary while the train is moving towards her. As the train moves towards the observer, the sound waves from the train are compressed, resulting in a higher frequency. The formula for calculating this frequency is given by:

f' = f ((v + u)/(v - u))

where f is the frequency of the train horn, v is the speed of sound, u is the velocity of the train towards the observer, and f' is the frequency heard by the observer. Plugging in the given values, we get: f' = 550 ((343 + 45)/(343 - 45)) = 607 Hz Therefore, the frequency heard by the stationary observer is 607 Hz.

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Answer:

d.) Newton's first law

Explanation:

This is also called the law of inertia, which means that an object in motion will not stop unless a force is acted upon it, and vice versa. Try this out with a piece of paper and a quarter. Pull the paper from under the quarter slightly quick, and the quarter will stay on the table. Hope i helped you.

7200 joules of heat and light energy was dissipated into the air. But no work was done ... no force moved through no distance.

The magnitude of the resultant vector is 13.9m.

The size of the resulting vector can be determined using the Pythagorean theorem. As you can see from these two examples, the result of adding three or more rectangular vectors is easy to determine using the Pythagorean theorem. The vectors should be added in a different order. Equation 2 Subtracts the vectors in opposite directions from each other to get the resulting vector.

Where vector B is in the opposite direction to vector A and R is the resulting vector. The resulting vector is defined as a single vector that produces the same effect as many vectors produced together. The size of a vector is the length of the vector. The absolute value of vector a is represented by |a|. For more information on vector sizes, see Vectors overview. The formulas for the sizes of 2D and 3D vectors in terms of coordinates are derived on this page.

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Answer:

Explanation:

b )

Normal force R = mgcosθ

= 76.6 x 9.8 x cos 38

R = 591.5 N

c )

Force of friction

= μ R

μ is coefficient of friction .

= .15 x 591.5

= 88.73 N

d )

Net force

= mg sinθ - friction

= 76.6 x 9.8 x sin 38 - 88.73

= 462.16 - 88.73

= 373.43 N

Acceleration = 373.43 / 76.6

a = 4.87 m / s²

e )

v² = u² + 2 a s

s = 40.5 m

a = 4.87

u = 0

v² = 0 +2 x 4.87 x 40.5

= 394.5

v = 19.86 m /s

f )

v = u + a t

19.86 = 0 + 4.87 t

t = 4 .07 s

A rock climber stands on the top of a 53 m high cliff overhanging a pool of water, so for 3.1 seconds, after which the second stone hit the water.

The overall distance the object covers in a given amount of time is its average speed. The scalar quantity represents the average speed. It does not have direction; it is represented by magnitude.

Average Speed= \(Total\ Distance/ Total\ time\)

According to the question, the given values are :

v₁ = 1.5 m/s

y₂ = 52 m

y₁ = 0 m

Acceleration, a = 9.8 m/s²

Use Formula :

y₂ = y₁ + v₁t + 0.5 at²

52 = 0 + 1.5t + 0.5 (9.8)t²

4.9 t² + 1.5 t - 52 = 0

\(t=-b\frac{+}\ \sqrt{b^2-4ac}/2a\)

t = -1.5 + \(\sqrt{2.25+1019.2}\)/9.8

t = (-1.5 + 31.9)/9.8

t = 3.10 seconds.

Hence, the time period will be 3.10 seconds.

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The bearing stress in this scenario is 2 kN/mm². To calculate the bearing stress, we need to use the formula:
Bearing Stress = Load / Contact Area

Substituting the given values:
Bearing Stress = 10 kn / 5 square mm
Bearing Stress = 2 N/mm^2

It is important to note that bearing stress is a measure of the force per unit area exerted on the contact surface between two components. In this case, the load is distributed over an area of 5 square mm, resulting in a bearing stress of 2 N/mm^2. It is important to ensure that the bearing stress is within the allowable limits to prevent failure or damage to the components.

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Answer:

If an object pushes out an amount of water equal to its own weight, the upward force acting on it will be equal to gravity - and the object will float.

Explanation:

The buoyant force has an impact on the object in the water and equals the weight of the water displaced by the object. Every object placed in water has some buoyancy force that pushes it against the gravitational force, and this means that any object loses weight in the water.

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 48 × 3

We have the final answer as

Hope this helps you

The rotational inertia of the wheel of a scooter is 0.48 kg m².

In the context of linear motion, the rotating inertia may be described as an equivalent mass. The initial angular velocity of the wheel = ω1 = 1.4 rad/s. The final angular velocity of the wheel = ω2 = 4.7 rad/s, The torque acting on the wheel = τ = 6.2 Nm, The time taken for the wheel to achieve the final velocity = t = 4.5 s, The relation between torque, angular acceleration and rotational inertia is given by the equation;

τ = Iα

Where I is the rotational inertia, τ is the torque, and α is the angular acceleration.I can be calculated as;

I = τ/α

Also, we know that;

α = (ω2 - ω1)/t

Substituting the values of torque and angular acceleration in the equation to calculate the rotational inertia, we get;

I = τ/α= 6.2/[(4.7 - 1.4)/4.5]= 0.48 kg m²

Therefore, the rotational inertia of the wheel of a scooter is 0.48 kg m².

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Answer:

a. Energy lost, Q = 16,800 Joules.

b. Power = 28 J/s

c. Time, t = 2357.14 seconds

d. I assumed that the ice remained at a temperature of zero degrees Celsius (0°C). Also, I assumed that the heat is being lost at a constant rate.

Explanation:

Given the following data;

a. To find the energy lost by the water as it cools to 0 degree celsius;

Mathematically, heat capacity is given by the formula;

\( Q = mcdt \)

Where;

dt = T2 - T1

dt = 20 - 0

dt = 20°C

We know that the specific heat capacity of water is equal to  4200 J/kg°C

Substituting the values into the formula, we have;

\( Q = 0.20 * 4200 * 20 \)

Energy lost, Q = 16,800 Joules.

b. To find the average rate at which the water is losing energy in J/s by using the following formula;

\( Power = \frac {energy}{time} \)

First of all, we would have to convert the value of time in minutes to seconds.

Conversion:

1 minute = 60 seconds

10 minutes = X seconds

Cross-multiplying, we have;

X = 60 * 10

X = 600 seconds

Substituting the values into the formula, we have;

\( Power = \frac {16800}{600} \)

Power = 28 J/s

c. To estimate the time taken for the water at 0 degree celsius to turn completely into ice;

We know that the latent heat of fusion of water is equal to 3.3 * 10⁵ J/kg.

Mathematically, the latent heat of fusion is calculated by using the formula;

Energy, Q = ml = pt

Substituting the values into the formula, we have;

0.20 * 3.3 * 10⁵ = 28 * t

0.20 * 330000 = 28t

66000 = 28t

\( t = \frac {66000}{28} \)

Time, t = 2357.14 seconds.

d. The assumption made is that, the ice remained at a temperature of zero degrees Celsius (0°C). Also, I assumed that the heat is being lost at a constant rate.

Answer

Explanation: R=p l/A , we are given specific resistance of aluminium in terms of silver.

Reverberation, in psychoacoustics and acoustics, is a persistence of sound after the sound is produced

Explanation:

I think it is right hope its helps

Answer:

D. A single sound undergoes several reflections due to multiple reflecting surfaces.

Explanation:

Sometimes, the source of a sound is surrounded by multiple reflecting surfaces. The waves traveling from the source strike these different surfaces, causing multiple reflections. For example, a single clap of thunder reflects on several clouds and the earth's surface, causing you to hear a rolling rumble instead of a single sound.

Answer:

3.41 × 10^-6

It is because 341 has to be a decimal and the zeros you see there...always count them if the zero has the decimal after it it will be a negative. Why 10 to the power of Negative 6? Count the 6 zeros

The required height of the cliff is 4.4 m.

Given data:

The magnitude of initial speed of rock is, u = 12 m/s.

The time interval of hitting is, t = 2.0 s.

The given problem is clearly resolved using the concept and fundamentals of second kinematic equation of motion. As per the second kinematic equation of motion we have,

\(h =ut+\dfrac{1}{2}(-g)t^{2}\)

Here,

h is the height of cliff.

g is the gravitational acceleration.

Solving as,

\(h =(12 \times 2)+\dfrac{1}{2}(-9.8) \times2^{2}\\\\h = 4.4\;\rm m\)

Thus, we can conclude that the required height of the cliff is 4.4 m.

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