A blacksmith heated 2 kg of iron piece to 120°C in the furnace and took it out of the fire for hammering into thin sheet. The iron piece cooled down to 30°C during the process of hammering. What was the amount of heat lost by the iron? Take specific heat capacity of iron as 450 J/kg°C.​

The one that is best set to use for separating a mixture of water, sugar, and pebbles is a filter and a hot plate. The correct option is B.

A mixture is made up of one or more pure substances that have varying compositions.

Mixtures are classified into two types: heterogeneous and homogeneous. Heterogeneous mixtures have distinct components, whereas homogeneous mixtures appear uniform throughout.

During distillation, the sugar solution is heated, causing water to evaporate and leaving the sugar behind.

After that, the water vapor is passed through an inclined tube. It cools due to the cold water around it and condenses to form water in a separate container.

Filters can generally separate mixtures of solids in liquids, solids in gases, and solids in solids. Filtration is the separation of unwanted particles from desired particles.

Thus, the correct option is B.

For more details regarding mixture, visit:

https://brainly.com/question/24898889

#SPJ2

a. Ray Diagram: The objective lens produces a real image inside the focal length of the eyepiece lens, which is then magnified to create a virtual image at infinity.

b. Total Magnification: The microscope has a total magnification of 754x, calculated by multiplying the magnification of the eyepiece (13x) by the magnification of the objective lens (58x).

c. Focal Length: To calculate the focal length of each lens, we can use the lens formula. Assuming the image distance for the objective lens is -20.0 cm (on the same side as the object) and the image distance for the eyepiece lens is infinity (virtual image), we find that both lenses have a focal length of -20.0 cm.

d. Object Location: To find where the object must be located for a normal, relaxed eye to see it in focus, consider the near point of around 25 cm. Use the lens formula for the objective lens to calculate the object distance that corresponds to the image distance of 20.0 cm.

a. Ray Diagram for the Microscope:

To draw the ray diagram for the microscope, we need to understand the basic principles of how a compound microscope works. In a compound microscope, the objective lens produces a magnified real image of the object, which is then further magnified by the eyepiece to create the final virtual image. The eyepiece acts as a magnifying lens for the image produced by the objective lens.

In the ray diagram, draw an arrow representing the object placed to the left of the objective lens. The objective lens will produce a real, inverted, and magnified image of the object. This image is located inside the focal length of the eyepiece lens. The eyepiece lens will then magnify this real image to create the final virtual image, which is located at infinity. Draw the refracted rays for each lens, showing the path of the rays as they pass through each lens and are refracted.

b. Total Magnification:

The total magnification of a compound microscope is calculated by multiplying the magnification of the objective lens by the magnification of the eyepiece. In this case, the eyepiece has a magnification of 13.0x, and the objective lens has a magnification of 58.0x. To find the total magnification, multiply these two values:

Total Magnification = Eyepiece Magnification × Objective Lens Magnification

Total Magnification = 13.0x × 58.0x

Total Magnification = 754x

c. Focal Length of Each Lens:

To calculate the focal length of each lens, we can use the lens formula:

1/f = 1/v - 1/u

Where:

f = focal length of the lens

v = image distance

u = object distance

For the objective lens:

Given that the objective lens and eyepiece are 20.0 cm apart, the image produced by the objective lens will serve as the object for the eyepiece.

Let's assume the image distance for the objective lens is -20.0 cm (since it is on the same side as the object). Plugging the values into the lens formula:

1/\(f_o_b_j_e_c_t_i_e\) = 1/-20.0 - 1/u

For the eyepiece lens:

Since we're dealing with the virtual image produced by the objective lens, the image distance for the eyepiece lens is infinity (as the virtual image appears at infinity when viewed through the eyepiece).

Plugging the values into the lens formula:

1/\(f_e_y_e_p_i_e_c_e\) = 1/infinity - 1/20.0

Simplifying the equation:

1/\(f_e_y_e_p_i_e_c_e\) = 0 - 1/20.0

Now, we can solve for the focal lengths:

\(f_o_b_j_e_c_t_i_e\) = -20.0 cm

\(f_o_b_j_e_c_t_i_e\) = -20.0 cm

The negative sign indicates that the lenses are diverging lenses commonly used in microscopes.

d. Object Location for Normal, Relaxed Eye to See in Focus:

To calculate the object location for a normal, relaxed eye to see the image in focus, we need to consider the concept of the near point (the closest distance at which the eye can focus). The near point is typically considered to be around 25 cm for a relaxed eye.

Using the lens formula for the objective lens, we can find the object distance (\(u_o_b_j_e_c_t_i_v_e\)) that corresponds to the image distance (\(v_o_b_j_e_c_t_i_v_e\)) of 20.0 cm:

1/\(f_o_b_j_e_c_t_i_v_e\) = 1/20.0 - 1/\(u_o_b_j_e_c_t_i_v_e\)

For more such information on: lens

https://brainly.com/question/13874733

#SPJ8

The question probable may be:

a microscope has a 13.0x eyepiece and a 58.0x objective lens 20.0 cm apart.

A. explain how the ray diagram should be drawn for the microscope under normal use.

B. calculate the total magnification.

C. calculate the focal length of each lens.

D. calculate where the object must be located for a normal, relaxed eye to see it in focus.

For a long straight wire carrying conductor the magnitude of the magnetic field produced around it  is proportional to I/r, and the direction is out of the page at P.

A magnetic field is produced by moving charges. Charges are constantly moving in a conductor carrying current; as a result, magnetic fields are created all around the conductor.

The right-hand thumb rule indicates the direction of this magnetic field. The thumb of the right hand is used in this rule to indicate the current's direction. The direction of the magnetic field surrounding the wire is indicated by the curled fingers.

The magnitude of the magnetic field produced by the current carrying conductor depends on the following factors:

The magnitude of the current flowing through the conductor

The distance to the point where the field value is calculating.

To know more about the magnetic field here

https://brainly.com/question/14115512

#SPJ4

Answer: James Chadwick

:)

Answer: no plastic

Explanation:

Answer:

No littering!

Explanation:

Answer:

0.25 N-m

Explanation:

PE=0.5kx^2; PE=potential engery, k=stiffness of spring, x=displacement

=0.5(50)(0.1^2)

=0.25 N-m

The density (ρh) of hot air inside the balloon, assuming it is uniform throughout, can be expressed in terms of Th, Tc  and ρc (density of surrounding air) using the ideal gas law as follows: ρh = (ρc * Tc) / Th

The ideal gas law states that for a given amount of gas, the product of its pressure (P) and volume (V) is proportional to the product of its temperature (T) and the number of moles (n). Mathematically, it can be expressed as:

PV = nRT

Where R is the ideal gas constant.

Since we are considering a balloon filled with hot air, the pressure and volume inside the balloon remain constant. Therefore, we can modify the ideal gas law to relate the densities of hot air (ρh) and surrounding air (ρc) to their respective temperatures:

(ρh * V) / Th = (ρc * V) / Tc

Here, V represents the volume of the balloon, which cancels out on both sides of the equation.

Simplifying the equation:

ρh / Th = ρc / Tc

Rearranging the equation to solve for ρh:

ρh = (ρc * Tc) / Th

The density (ρh) of hot air inside the balloon, assuming it is uniform throughout, can be calculated using the ideal gas law. The expression for ρh in terms of Th (temperature of hot air), Tc (temperature of surrounding air), and ρc (density of surrounding air) is given as: ρh = (ρc * Tc) / Th.

To know more about density, visit:

https://brainly.com/question/952755

#SPJ11

Under reversed polarity, we found the results to be exactly in current direction, while the current maximums were 0, negative, positive, opposite and the same.

What is reversed polarity?

Reversed polarity refers to a situation where the positive and negative terminals of an electrical circuit are connected in reverse order. This can happen accidentally due to improper wiring, or intentionally as a means of reversing the direction of current flow.

Reversed polarity can cause electrical equipment to malfunction, overheat, or fail altogether. It can also create safety hazards such as electric shock, fire, or explosion. Therefore, it is important to ensure proper polarity in electrical circuits and devices.

To learn more about reversed polarity, visit: https://brainly.com/question/16979824

#SPJ1

Answer:

Explanation:

0
negative
positive
opposite
the same

Insulators, such as glass or plastic, prevent the flow of electric charge, allowing the charged rod to maintain its charge and transfer it to other objects.

In electrostatic experiments, a charged rod is used to transfer charge between objects. The charged rod used in such experiments is always made of an insulator.

An insulator is used because it can hold an electric charge without allowing it to flow freely.

If a conductor, like a metal rod, were used instead, the charge would immediately distribute itself uniformly across the surface of the conductor, and the experiment would not work as intended. Insulators, such as glass or plastic, prevent the flow of electric charge, allowing the charged rod to maintain its charge and transfer it to other objects.

Learn more about Insulators:
https://brainly.com/question/30891246

#SPJ4

Answer:

v = 0.363 m/s

Explanation:

Given that,

The table is 0.55m tall and the tennis ball lands 0.12m away from the table.

Here, u = 0 (at rest) for initial vertical velocity as it rolls off the edge of a table.

Let t is the time to fall from the vertical height. So,

\(h=ut+\dfrac{1}{2}at^2\\\\t=\sqrt{\dfrac{2h}{g}} \\\\t=\sqrt{\dfrac{2\times 0.55}{9.8}} \\\\t=0.33\ s\)

It can be assumed to find the initial horizontal velocity of the tennis ball. It can be given by :

\(v_x=\dfrac{x}{t}\\\\v_x=\dfrac{0.12}{0.33}\\\\v_x=0.363\ m/s\)

Hence, the initial horizontal velocity is 0.363 m/s.

The potential difference between xi = 1.4 m and xf = 2.4 m can be calculated by subtracting the initial position from the final position. In this case, the potential difference is 1.0 m.

The potential difference, also known as voltage, is a measure of the electric potential energy difference between two points in an electric-field. It represents the work done per unit charge in moving a charge from one point to another. In this scenario, we are given two positions, xi and xf, and we subtract the initial position from the final position to determine the potential difference. The result, 1.0 m, represents the change in potential energy per unit charge between the two points.

Learn more about electric-field ,click here https://brainly.com/question/14355785

#SPJ11

The percentage of water that leaves the pot in the form of steam each hour is approximately 20003.75%. b) The amount of water remaining in the pot after 5 hours is approximately 20023.75 liters.

To find the initial amount of water in the pot, we can substitute t = 0 into the function W(t) and solve for W(0).

W(0) = 4000.75(0) + 20 = 20 liters

Therefore, the initial amount of water in the pot is 20 liters.

To calculate the percentage of water that leaves the pot in the form of steam each hour, we need to calculate the rate of water loss per hour and express it as a percentage of the initial amount.

The rate of water loss per hour can be found by taking the derivative of the function W(t) with respect to t:

W'(t) = 4000.75

Since the derivative is constant, it represents the rate of water loss per hour. So the percentage of water loss per hour is:

(4000.75/20) × 100% = 20003.75%

(b) To calculate the amount of water remaining in the pot after 5 hours, we can substitute t = 5 into the function W(t).

W(5) = 4000.75(5) + 20 = 20003.75 + 20 = 20023.75 liters

To know more about percentage

https://brainly.com/question/28998211

#SPJ4

The combination of frequencies that produce the lowest beat frequency is 10 Hz and 15 Hz. The correct option is C.

To determine the beat frequency, we subtract one frequency from the other and take the absolute value. The beat frequency is the difference between the frequencies involved in the interference pattern created by two sound waves.

Let's analyze each option:

A. 500 Hz and 501 Hz: The beat frequency would be 501 Hz - 500 Hz = 1 Hz.

B. 10 Hz and 20 Hz: The beat frequency would be 20 Hz - 10 Hz = 10 Hz.

C. 10 Hz and 15 Hz: The beat frequency would be 15 Hz - 10 Hz = 5 Hz.

D. 500 Hz and 600 Hz: The beat frequency would be 600 Hz - 500 Hz = 100 Hz.

Therefore, option C (10 Hz and 15 Hz) produces the lowest beat frequency of 5 Hz compared to the other options.

To learn more about Frequency click:

brainly.com/question/1292129

#SPJ1  

Answer:

As you increase in elevation, there is less air above you thus the pressure decreases. As the pressure decreases, air molecules spread out further (i.e. air expands) and the temperature decreases.

The X component was 13.4m and the Y component was 19.9m.

define magnitude ?

A crucial question in science is undoubtedly what is magnitude in physics. Magnitude is a term used to describe size or distance. We can connect the amount of the movement to the size and movement speed of the item.

The magnitude of a thing or a quantity is its size. A automobile moves at a quicker pace than a motorcycle, just like in terms of speed. In this situation, the car's speed is greater than the motorbike's. Let's now talk about what magnitude means in physics.

y=m sin(∅)

x=m cos(∅)

y=2+sin(56)=19.89

=19.89 ≈ 19.9m

x=2+cos(56)=13.42

=13.42≈13.4m

The X component was 13.4m and the Y component was 19.9m.

To learn more about magnitude follow the given link: https://brainly.com/question/8850735

#SPJ4

The regular satellites of the giant planets formed via the process of accretion from a circumplanetary disk.

The giant planets in our solar system, such as Jupiter, Saturn, Uranus, and Neptune, are surrounded by a system of moons, which are divided into two main categories: regular and irregular. The regular satellites are large, spherical, and have nearly circular orbits around their host planets. They are believed to have formed from a circumplanetary disk of gas and dust that surrounded the planet during its formation. The gravitational forces of the planet caused the material in the disk to accrete into small bodies, which eventually coalesced into the regular satellites we see today.

To know more about satellites, here

brainly.com/question/21675499

#SPJ4

A coil set-up without an iron core, featuring thirty loops, functioned as the control in the experiments. This configuration served as a baseline to compare the outcomes all other setups contained within the experiment.

It is essential that any testing environment deploys a control to create a standard of reference when assessing alterations made to the conditions of the experiment.

The inclusion of an iron core to the coiling design led to the most significant modifications being brought about for the strength of the electromagnet. These changes were evidence by the rise in paperclips collected when inserting an iron nucleus into both the thirty-loop and sixty-loop configurations.

Learn more about coil on

https://brainly.com/question/27605406

#SPJ1

Answer:

The Kinetic energy Possessed by the hammer gets converted into heat energy when it strikes the piece of iron

Answer:

i beleive i cannot help you in physics

Explanation:

You can download answer here

tinyurl.com/wpazsebu

If the distance between the two particles is increased to 8.44 mm, the electrical potential energy will increase because work must be done to separate two particles that attract one another. Hence option(A) is correct.

Potential energy is the energy held by an object as a result of its position relative to other objects, internal stresses, electric charge, or other factors.

The gravitational potential energy of an object, the elastic potential energy of an extended spring, and the electric potential energy of an electric charge in an electric field are all examples of common types of potential energy. The joule, denoted by the symbol J, is the unit of energy in the International System of Units (SI).

The positive and negative charges attract each other, so work must be done to separate two particles. Hence, the electrical potential energy will increase.

Learn more about  potential energy here:

https://brainly.com/question/24284560

#SPJ2

Answer:

These two groups of planets are separated by the asteroid belt, a disk of small rocky bodies orbiting the sun between Mars and Jupiter.

Explanation:

Your welcome!

The correct answer is B) partially inelastic. If the masses of the blocks and the velocities before and after being given then The collision is partially inelastic.

To determine the character of the collision, you need to compare the kinetic energy before and after the collision. If the kinetic energy is the same before and after the collision, the collision is elastic. If the kinetic energy is less after the collision, the collision is inelastic. If the kinetic energy is greater after the collision, the collision is not possible because energy cannot be created or destroyed, it can only be transformed from one form to another.

Learn more about Collision here:

https://brainly.com/question/24915434

#SPJ4

The ozone layer is a region of the Earth's stratosphere that contains a high concentration of ozone (O3) molecules.

It plays a crucial role in protecting life on Earth by absorbing the majority of the Sun's harmful ultraviolet (UV) radiation. The depletion of the ozone layer, primarily caused by human activities, leads to an increase in UV radiation reaching the Earth's surface. This has significant adverse effects on human health, ecosystems, and the environment.

The ozone layer is located in the Earth's stratosphere, approximately 10 to 50 kilometers above the surface. It is formed by the interaction of UV radiation from the Sun with oxygen molecules (O2). The UV radiation breaks apart the oxygen molecules, and the resulting oxygen atoms (O) combine with other oxygen molecules to form ozone (O3).

The ozone layer is essential because it acts as a shield, absorbing the majority of the Sun's UV-B and UV-C radiation, preventing it from reaching the Earth's surface. UV radiation is harmful to living organisms, as it can cause DNA damage, skin cancer, cataracts, and weakened immune systems. The ozone layer's ability to filter out these harmful rays helps protect human health and supports the functioning of ecosystems.

However, human activities have significantly contributed to the depletion of the ozone layer, primarily through the release of certain chemicals known as ozone-depleting substances (ODS), such as chlorofluorocarbons (CFCs) and halons. These substances were commonly used in aerosols, refrigeration, air conditioning, and fire suppression systems. Once released into the atmosphere, ODS molecules can reach the stratosphere and undergo reactions that break down ozone molecules.

The depletion of the ozone layer has several detrimental effects. Increased UV radiation reaching the Earth's surface can lead to an increase in skin cancer cases, cataracts, and other health issues in humans. UV radiation also harms phytoplankton, which are vital for marine ecosystems and the global carbon cycle. Additionally, UV radiation can negatively impact terrestrial and aquatic ecosystems, causing DNA damage, reduced plant growth, disruption of food chains, and harm to coral reefs and other sensitive marine organisms.

Recognizing the importance of protecting the ozone layer, the international community developed the Montreal Protocol in 1987, which aims to phase out the production and use of ODS. Through global efforts to reduce ODS emissions, there has been a gradual recovery of the ozone layer in recent years.

In short , the ozone layer acts as a natural shield, protecting life on Earth from harmful UV radiation. The depletion of the ozone layer due to human activities has severe consequences for human health, ecosystems, and the environment. It is crucial to continue efforts to reduce ozone-depleting substances and preserve the integrity of the ozone layer for the well-being of present and future generations.

To learn more about ozone, click here:
brainly.com/question/1567461
#SPJ11

Answer: because of air resistance. See explanation for further details.

Explanation: Galileo performed an experiment to proof that the time of descent of two different masses is independent of time.

But in reality this is most likely not true because of air resistance and other fluid frictional effects in consideration.

If the experiment is performed in a vacuum, it will always be true that time is independent of masses of two falling objects.

The upward force exerted by the elevator floor on the passenger is 7.6 times mass of the passenger.

A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

Given in question elevator accelerates downwards with an acceleration of 1.2 m/s². There is acceleration due to gravity working downward which is 9.8 m/s².

So, net acceleration due to gravity is given as 9.8 - 1.2 = 7.6 m/s²

The upward force exerted by the elevator floor on the passenger is mass times acceleration, 7.6 times mass of passenger.

To learn more about force refer to the link:

brainly.com/question/13191643

 #SPJ1

Answer:

Explanation:

Clean Energy Source It generates more than 800 billion kilowatt hours of electricity each year and produces more than half of the nation's emissions-free electricity. This avoids more than 470 million metric tons of carbon each year, which is the equivalent of removing 100 million cars off of the road.

If I'm wrong I'm sorry

If I'm right thank you and (brainliest plz)

Answer: Cross-cutting features are always younger than the surrounding rock.

When material erodes before sediment is deposited on it, a geologic gap results.

Explanation:

The options include:

1. An unconformity is created when lava pours out on Earth’s surface.

2. Faults are the result of volcanic activity.

3. Intrusions and extrusions are sedimentary formations.

4. Cross-cutting features are always younger than the surrounding rock.

5. When material erodes before sediment is deposited on it, a geologic gap results.

The law of superposition simply states that when there is a layers of rocks, we would see that the younger layers will lie and be on top of the layers that are older.

Other tools that can help scientist with relative dating are:

• Cross-cutting features are always younger than the surrounding rock.

• When material erodes before sediment is deposited on it, a geologic gap results.

Explanation:

It's on Edge

Answer:

26°

Explanation:

inreases by a minute

Answer:

d

Explanation: