How many grams of baking soda are in a 25.5 kg bag?

When the eye is slightly moved in any direction after concentrating, the crosshairs should appear to pass over the item observed. If they don't, parallax is present.

If accurate work is to be done, this effect must be removed by refocusing the objective lens, the eyepiece, or both.

The apparent displacement or difference in the apparent direction of an object as observed from two different positions other than those directly across from the object is known as parallax. the angle between two locations on the earth's orbit where a celestial body's orientation is measured.

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Answer:

The thermal efficiency, \(\eta _{reheat}\), of the Rankine cycle with reheat is 36.81%

Explanation:

p₁ = 8 MPa = 80 Bars

T₁ = 450°C = 723.15 K

From steam tables, we have;

v₁ = 0.0381970 m³/kg

h₁ = 3273.23 kJ/kg

s₁ = 6.5577 kJ/(kg·K) = s₂

The p₂ = 0.8 MPa

T₂ = Saturation temperature at 0.8 MPa = 170.414°C = 443.564 K

h₂ = 2768.30 kJ/kg

\(T_{2'}\) = 400°C = 673.15 K

\(h_{2'}\) = at 400°C and 0.8 MPa = 3480.6 kJ/kg

p₃ = 10 kPa = 0.1 Bar

T₃ = Saturation temperature at 10 kPa = 45.805 °C = 318.955 K

h₃ = 2583.89 kJ/kg

h₄ = \(h_{3f}\) = 191.812 kJ/kg

The thermal efficiency, \(\eta _{reheat}\), of a Rankine cycle with reheat is given as follows;

\(\eta _{reheat} = \dfrac{\left (h_{1}-h_{2} \right )+\left (h_{2'}-h_{3} \right )-W_{p}}{h_{1}-\left (h_{4}+W_{p} \right )+\left (h_{2'}-h_{2} \right )}\)

Therefore, we have;

\(\eta _{reheat} = \dfrac{(3273.23 -2768.30 ) + (3480.6 -2583.89 ) - 8.04)}{(3273.23 -(191.812 + 8.04) + (3480.6 -2768.30 ) } = 0.3681\)

Which in percentage is 36.81%.

Answer:

Velocity = distance / time

V = 10/1

V = 10km/h

Answer:10km/h or 2.77m/s.

Explanation:

Distance =10km

Time =1h

Velocity =10/1 =10km/h

Or,

Distance =10km =10000m

Time =1h =60min = 3600s

Velocity =10000/3600 =2.77m/s

Answer:

D.

Explanation:

Answer:

2.52N

Explanation:

according to law of moments ,

F1L1=F2L2 ,where the forces are in equilibrium .

0.85(44.5)= 15F2

that is , taking their distances from 50cm point

37 .825=15F2

37.825÷15= F2

2.52N = F2

The magnitude of electric field decreases as distance from the tip of the rod increases.

The magnitude of the electric field around a charged object like a rod decreases as the distance from the tip of the rod increases.

This is because the electric field strength follows an inverse square law, meaning that the farther away from the source the field is, the weaker it becomes.

Additionally, the shape and size of the rod can also affect the electric field strength.

A longer and thinner rod will produce a stronger electric field at the tip compared to a shorter and thicker rod, all other factors being equal.

The electric field strength is an important factor to consider in applications like lightning rods and electrostatic precipitators.

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Answer:

123.75 m/s

Explanation:

Given:

To Find:

Formula used:

where,

S is distance travelled

u is initial velocity

v is final velocity

t is time taken

where,

v is final velocity and rest meaning is written above.

Let the acceleration of truck be a

Using the above formula, we get

500 = 10*13 + a(13)^2/2

370 = 169a/4

a = 8.75 m/s^2

So, Putting value of a in v = u + at, we get

v = 10 + 8.75*13

v = 123.75 m/s

So, the final velocity will be 123.75 m/s.

Answer:

this is an amazing question

Answer:

The kinetic energy of the phone would increase. The gravitational potential energy of the phone would decrease.

Explanation:

The kinetic energy \({\rm KE}\) of an object is proportional to the square of the speed of that object. If air resistance is negligible, the phone would accelerate under gravitational pull and speed up. Hence, the kinetic energy of the phone would increase.

The gravitational field near the surface of the earth is approximately constant. Hence, the gravitational potential energy \({\rm GPE}\) of the phone would be proportional to its height. As the phone approaches the ground, the height of the phone becomes lower and the gravitational potential energy of the phone would decrease.

The magnitude of the average vertical force exerted by the horizontal surface on the bar can be found using the impulse-momentum theorem,

which states that the impulse applied to an object is equal to its change in momentum.

Assuming that the bar is rigid and does not deform during the impact, the change in momentum of the bar is equal to the product of its mass and the change in velocity.

Since the bar is released from rest, its initial velocity is zero and its final velocity after rebounding is also zero.

Therefore, the change in momentum is zero, which means that the impulse applied to the bar during the impact is also zero.

However, we know that the duration of the impact is 0.01 s. This means that the average force exerted by the horizontal surface on the bar is given by the equation:

Average force = Impulse / Duration of impact

Since the impulse is zero, the average force is also zero. Therefore, the magnitude of the average vertical force exerted by the horizontal surface on the bar at point P is zero.

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Answer:

if we ignore air resistance .. which might slow her down a lot towards the end of the 7 seconds.. but we will just ignore that for this question

Explanation:

then V=Vo+a*t

Vo=0

V=a*t

V=9.8(7)

V=68.6 m/s  just a little over 150 MPH.. but.. I think terminal velocity is close to 120... soo hmm maybe about that fast... but that with air resistance.. so this problem depends a lot on if you're going to ignore that

According to the conservation of angular momentum, if an ice-skater starts spinning with her arms out wide, and then slowly pulls them close to her body, this will cause her to spin faster. The conservation of angular momentum states that the total angular momentum of a system remains constant as long as no external torque acts on it. This means that if a spinning object pulls its arms closer to its body, its rotational speed will increase.

This is because the moment of inertia of the system is reduced as the mass is brought closer to the axis of rotation. Since the angular momentum of the system must remain constant, an increase in rotational speed must occur to compensate for the decrease in moment of inertia. The principle of conservation of angular momentum can be observed in many physical systems, such as figure skating, where an ice skater spinning with her arms extended can increase her rotational speed by pulling her arms closer to her body. This is because the total angular momentum of the skater is conserved, and the decrease in moment of inertia is compensated by an increase in rotational speed.

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To calculate the average deceleration of the bus, we can use the following formula:

Here, the initial velocity (v1) is 60 km/h, the final velocity (v2) is 40 km/h, and the time taken (t) is 8 seconds. To make the units consistent, we'll convert the velocities from km/h to m/s.

Now, we can plug the values into the formula:

Now, we'll find a common denominator for the fractions and simplify:

So, the average deceleration of the bus is approximately -150/216 m/s².

Answer:

Kinetic Energy=1/2×m×v^2,Where m=mass,v=velocity. So, kinetic energy of the object=1/2×150×15^2 = 16875 kg m^2 s^-2 .

Explanation:

math lol

The speed of the γ radiation with a wavelength of 0.0000015 m in a vacuum is also 3 x 10^8 m/s.

The electromagnetic (EM) field's waves, which travel across space carrying momentum and electromagnetic radiant energy, make up electromagnetic radiation (EMR). The electromagnetic spectrum is made up of radio waves, microwaves, infrared, ultraviolet, X, and gamma rays, among other types of EMR. Electromagnetic waves, which are synchronised oscillations of the electric and magnetic fields, are the traditional form of electromagnetic radiation.

The electromagnetic spectrum is created at various wavelengths depending on the oscillation frequency. Electromagnetic waves move at the speed of light, typically abbreviated as c, in a vacuum. The oscillations of the two fields create a transverse wave in homogeneous, isotropic media when they are perpendicular to each other, perpendicular to the direction of energy and wave propagation, and perpendicular to each other.

gamma (γ) radiation is a form of electromagnetic radiation, and it travels at the speed of light in a vacuum.

The speed of light (c) is approximately 3 x 10^8 meters per second (m/s).

Therefore, the speed of the γ radiation with a wavelength of 0.0000015 m in a vacuum is also 3 x 10^8 m/s.

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Answer:

UV Light I think, sorry if I'm wrong

The leaves are getting closer.

An electroscope is an early scientific instrument used to detect the presence of electrical charges in a body. The charge is detected from the motion of the test object due to the Coulombic electrostatic force acting on the test object. The amount of electric charge on an object is proportional to the voltage. The electroscope consists of a metal button and he two blades. When a negatively charged object is brought close to the instrument, the blade will repel and move away. There are two types of electroscopes: the medulla electroscope and the gold foil electroscope. When a negatively charged object is brought close to the electroscope, the charge induces a positive charge on the leaves. So nothing should happen. However, induction causes the leaves to move closer together.

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Answer:

Workdone = 17482.36 Joules

Explanation:

Given the following data;

Force, F = 120 N

Angle, d = 28.0°

Distance, x = 165 m

To find the work done, we would use the following formula;

Workdone = FxCosd

Substituting into the formula, we have;

Workdone = 120*165*Cos(28)

Workdone = 19800 * 0.8830

Workdone = 17482.36 Joules

The formula for horizontal distance is x = Vx * t, where t is the time. The formula for vertical distance from the ground is y = h + Vy * t - g * t2 / 2, where g is the acceleration of gravity.

What is the free fall equation?

Where g is the acceleration of gravity, vf is equal to g * t. On Earth, the value of g is 9.8 m/s/s. The velocity of the object after being dropped from rest for any given period of time can be calculated using the aforementioned equation.

How is height determined?

At the spot where the ruler, book, or other flat object meets your head, lightly mark the wall with a pencil. Measure the distance from the floor to the mark on the wall using a tape measure, preferably one made of metal that will stay straight.

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The science and the society are related because the science plays an important role for the development of the society in many shapes like car, watch, medicines, washing machine and many other things.

The science plays a very important role for the development of our societies. The science play a variety of functions for the benefits of our society by creating new knowledge, by improving the education and by also increases the quality of our lives.

The science provides many comforts for our society like making the washing machine makes our lives easier because the washing machine takes less time to wash the cloths than by ordinary method.

The science provide us comfort which is in the shape of car because we can covers a lot of distance in very less time than covering the distance by walking.

So we can conclude that the science and the society are related because the science plays an important role for the development of the society in many shapes like car, watch, medicines, washing machine and many other things.

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Answer:

The correct answer is - 2. Giraffe to trees.

Explanation:

In the carbon cycle, the movement of carbon is represented how it moves from one sphere to other and how it transfer among the different organism. The carbon moves from air to the trees in the form of carbon dioxide that is used by trees for the production of glucose by the process of photosynthesis through stomata.

The movement of the carbon among trees to different herbivores including giraffe is transferred by the eating of the leaves or fruits of the tree that carries glucose or starch. The transfer of carbon through giraffe does not take place directly but takes the release of carbon dioxide by the process of cellular respiration to the atmosphere.

The y-intercept of the lens represents the focal length of the lens.

The y-intercept of a lens refers to the point where the incident rays, parallel to the principal axis, converge or appear to diverge after passing through the lens. In other words, it represents the distance from the lens to the focal point.

When an object is placed between the focal point and the lens, a specific type of image is produced. This situation is known as an object placed in front of a converging lens. The characteristics of the image formed in this case are as follows:

1. Type: The image is virtual, meaning it cannot be projected onto a screen. It can only be seen when looking through the lens.

2. Orientation: The image is upright. It appears in the same orientation as the object.

3. Size: The image is magnified compared to the object. It is larger in size.

These three characteristics hold true when the object is positioned between the focal point and the lens. It is important to note that the specific values of the image's size and magnification would depend on the specific distance of the object from the lens and the focal length of the lens.

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Answer:

Desalination is a process that takes away mineral components from saline water.

Explanation:

u welcome

Interstitial diffusion and vacancy diffusion exhibit similar rates of atomic movement. Activation energy and concentration gradients have negligible effects on the speed of interstitial and vacancy diffusion.

(a) Interstitial and vacancy atomic mechanisms are two primary modes of diffusion in materials. In the interstitial mechanism, atoms move by squeezing into the spaces between existing atoms within a crystal lattice.

In contrast, the vacancy mechanism involves atoms moving through vacant lattice sites by hopping from one site to another.

One key difference between the two mechanisms is the involvement of atomic defects. Interstitial diffusion does not require the presence of vacancies and can occur even in a perfect crystal lattice.

On the other hand, vacancy diffusion relies on the presence of vacant lattice sites for atoms to migrate.

(b) Interstitial diffusion is typically more rapid than vacancy diffusion due to two main reasons:

1. Activation energy: Interstitial diffusion generally has a lower activation energy barrier compared to vacancy diffusion. The smaller size of interstitial atoms allows them to move more easily between lattice sites, requiring less energy to break atomic bonds and migrate.

In contrast, vacancy diffusion involves the diffusion of larger atoms through vacant sites, which often requires higher energy to overcome the larger energy barrier.

2. Concentration gradient: Interstitial diffusion tends to occur more rapidly because it is driven by concentration gradients. Interstitial atoms, being smaller in size, can diffuse through the crystal lattice more quickly to regions of lower concentration.

In contrast, vacancy diffusion relies on the availability of vacant sites, which may be limited, leading to slower diffusion rates.

These factors contribute to the generally faster diffusion rates observed in interstitial diffusion compared to vacancy diffusion. However, the actual diffusion behavior depends on the specific material, temperature, and other factors that influence atomic migration.

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I can try to help if you speak English

The time period of simple pendulum is 2xpi x (l/g)^1/2  when derived by dimensional method.

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The length of the pendulum is 3.3 m.

The given parameters:

P.E = K.E

mgh = ¹/₂mv²

gh = ¹/₂v²

g(L - Lcosθ) = ¹/₂v²

gL(1 - cosθ) = ¹/₂v²

\(L = \frac{v^2}{2g(1- cos\theta)} \\\\L = \frac{(3.4)^2}{2\times 9.8(1 - cos35)} \\\\L = 3.28 \ m\\\\L = 3.3 \ m\)

Thus, the length of the pendulum is 3.3 m.

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Answer:

b.They include familiar metals such as gold, silver, copper, and nickel.

They include familiar metals such as gold, silver, copper, and nickel.

Transition metals are like main group metals in many ways: They look like metals, they are malleable and ductile, they conduct heat and electricity, and they form positive ions.

"A metal is a material that, when freshly prepared, polished, or fractured, shows a lustrous appearance, and conducts electricity and heat relatively well. Metals are typically malleable or ductile."

"Transition metals are placed between s−block and p−block elements in periodic table. They are termed as d-block elements. These metals are unstable and exhibit transitional behavior between s block and p block elements, hence the name transition metals."

"Electricity is defined as the rate of flow of charges in a conductor."

Electricity is defined as the effects of an electric charge. An example of electricity is the force that powers a light bulb. An example of electricity is lightning. An example of electricity is static electricity, the buildup of electric charges on an object's surface.

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(a) The required angular speed at the beginning of the recording is approximately 52.38 radians per second.

(b) The required angular speed at the end of the recording is approximately 20.95 radians per second.

(c) The average angular acceleration of the disc is approximately -0.000286 radians per second squared.

(d) Assuming constant acceleration, the total angular displacement of the disc as it plays is approximately -0.343 radians.

(e) The total length of the track is approximately 5.28 kilometers.

(a) To find the required angular speed at the beginning of the recording, we can use the relationship between linear speed, angular speed, and radius. The linear speed is given as 1.30 m/s, and the radius is 2.30 cm (or 0.023 m). The formula to relate these quantities is:

Linear Speed = Angular Speed * Radius

Solving for angular speed:

Angular Speed = Linear Speed / Radius

Plugging in the given values:

Angular Speed = 1.30 m/s / 0.023 m

Angular Speed ≈ 56.52 radians/second

Therefore, the required angular speed at the beginning of the recording is approximately 52.38 radians per second.

(b) Similarly, to find the required angular speed at the end of the recording, we use the same formula and plug in the linear speed of 1.30 m/s and the radius of 5.80 cm (or 0.058 m):

Angular Speed = 1.30 m/s / 0.058 m

Angular Speed ≈ 22.41 radians/second

Therefore, the required angular speed at the end of the recording is approximately 20.95 radians per second.

(c) To find the average angular acceleration, we can use the formula:

Average Angular Acceleration = (Final Angular Speed - Initial Angular Speed) / Time

The final angular speed is the angular speed at the end of the recording, which is approximately 20.95 radians per second. The initial angular speed is the angular speed at the beginning of the recording, which is approximately 52.38 radians per second. The time is given as 74 minutes and 33 seconds, which is equivalent to 4473 seconds.

Average Angular Acceleration = (20.95 radians/second - 52.38 radians/second) / 4473 seconds

Average Angular Acceleration ≈ -0.000286 radians/second squared

Therefore, the average angular acceleration of the disc is approximately -0.000286 radians per second squared.

(d) Assuming constant angular acceleration, we can use the formula to find the angular displacement:

Angular Displacement = Initial Angular Speed * Time + (1/2) * Average Angular Acceleration * Time^2

The initial angular speed is approximately 52.38 radians per second, and the average angular acceleration is approximately -0.000286 radians per second squared. The time is given as 74 minutes and 33 seconds, which is equivalent to 4473 seconds.

Angular Displacement = 52.38 radians/second * 4473 seconds + (1/2) * -0.000286 radians/second squared * (4473 seconds)^2

Angular Displacement ≈ -0.343 radians

Therefore, the total angular displacement of the disc as it plays is approximately -0.343 radians.

(e) To find the total length of the track, we need to calculate the arc length of each bit and sum them up. Each bit occupies 0.6 mm of the track, which is equivalent to 0.0006 m.

The total number of bits can be calculated by multiplying the circumference of the spiral track by the number of revolutions. The circumference is given by 2π times the average of the initial and final radii.

Circumference = 2π * (2.30 cm + 5.80 cm) / 2

Circumference ≈ 27.77 cm

Converting the circumference to meters:

Circumference = 27.77 cm * 0.01 m/cm

Circumference ≈ 0.2777 m

The number of revolutions can be calculated by dividing the track length by the length of each bit:

Number of Revolutions = Track Length / Length of Each Bit

Number of Revolutions = 0.2777 m / 0.0006 m

Number of Revolutions ≈ 462.83 revolutions

Finally, we can calculate the total length of the track:

Total Length of the Track = Number of Revolutions * Circumference

Total Length of the Track ≈ 462.83 revolutions * 0.2777 m/revolution

Total Length of the Track ≈ 128.53 m

Therefore, the total length of the track is approximately 5.28 kilometers (or 5280 meters).

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Answer:

students need to take courses in math, such as calculus, linear algebra, and statistics. Computer science classes also are essential, because physicists and astronomers often develop specialized computer programs that are used to gather, analyze, and model data.