Do all metals stick to magnets? Give an example. I NEED HELP FASTT

Answer: B

Explanation:

The top number is its atomic number, also known as the number of protons in the atom.

The bottom number is the atomic mass, which is the sum of the number of protons and neutrons.

Based on this cell from the periodic table C. The atomic number of magnesium is 24.3, and its atomic mass is 12 is true

Upper part represents mass number which is sum of protons and neutrons

Lower part represents atomic number which is number of electron

number of electrons are equal in number of protons for a neutral atom and

from image it can be concluded that correct answer will be

C. The atomic number of magnesium is 24.3, and its atomic mass is

12

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D. The efficiency of the ramp is 54.6 %.

V.R = distance moved by effort/distance moved by load = L/h

V.R = (6.12)/(1.53) = 4

M.A = Load/Effort

M.A = (451 x 9.8)/(2025)

M.A = 2.183

E = (M.A / V.R) x 100%

E = (2.183 / 4) x 100%

E = 54.6 %

Thus, the efficiency of the ramp is 54.6 %.

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Answer:

when the ball is thrown upward kinetic energy will keep on decreasing and its potential energy will increase. when the ball reach maximum height, its kinetic energy is at the minimum

Explanation:

hopes it helps =D

A normal line is a line that is perpendicular to the boundary between two media. It is often used in optics to describe the behavior of light as it interacts with different surfaces.

When a light ray hits a boundary between two media at an angle, it will be refracted or reflected based on the angle of incidence and the properties of the media. The normal line is a reference line that is drawn perpendicular to the boundary at the point where the light ray hits it. This line helps to determine the angle of incidence and angle of reflection or refraction. It is important to note that the normal line is not always a straight line, but can be curved or angled depending on the shape of the surface it is interacting with. Therefore, the correct answer to the question is C) A line perpendicular to the boundary between two media.

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complete question:

What is a normal line? A) A line parallel to the boundary B) A vertical line separating two media C) A line perpendicular to the boundary between two media D) A line dividing incident ray from reflected or refracted ray E) Two of the above are possible

Answer:

theres no

Explanation:

picture or anything so... ur question doesnt make sense

Answer:;

Explanation:

Answer:

19pr

Explanation:

The equation represents how the kinetic energy (KE) of a system relates to its gravitational potential energy (GPE) and total mechanical energy (ME) is: KE = ME - GPE; option D

The law of conservation of energy states that in a system, the total energy is conserved. This means that energy is nether created nor destroyed but can be transformed from one form to another.

The total mechanical energy in a system is composed of two parts:

gravitational potential energy, and kinetic energy

Mathematically;

Thus the equation represents how the kinetic energy (KE) of a system relates to its gravitational potential energy (GPE) and total mechanical energy (ME) is KE = ME - GPE

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Explanation:

unable to understand ur question,,,sry!

The soil loss in  \(Mg ha^{-1}\) (Ton/ha) if the bulk density of the soil is 1.01  \(Mg m^{-3}\)  is option a. 0.202 Mg/ha.

For expressing the soil loss in \(Mg ha^{-1}\), need to convert the units appropriately. First, convert the soil loss from millimetres (mm) to meters (m) by dividing it by 1,000 (1 mm = 0.001 m). Thus, the soil loss is 0.0002 m.

Next, calculate the volume of soil lost per unit area (ha). The volume can be obtained by multiplying the soil loss (0.0002 m) by the area (ha). Since the bulk density of the soil is given as 1.01 \(Mg m^{-3}\), can convert the volume to mass by multiplying it by the bulk density.

Using the formula:

Soil loss (Mg ha-1) = Soil loss (m) × Bulk density (\(Mg m^{-3}\)) × Area (ha)

Substituting the values:

Soil loss (\(Mg ha-1\)) = 0.0002 m × 1.01 \(Mg m^{-3}\) × 1 ha

Calculating the result:

Soil loss (\(Mg ha-1\)) = 0.0002 × 1.01 = 0.000202 \(Mg ha-1\)

Therefore, the correct answer is option a. 0.202 Mg/ha.

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Answer:

Biologist >

Explanation:

A biologist is a scientist who examines organisms that are alive.

:)

The question is fishing for "balanced force".

But the description in the question is terrible.

If we lived in a universe that was shrinking rather than expanding, there would be several consequences:

1. Redshift instead of blue shift

2. The Universe's age would be shorter

3. If the Universe had shrunk, it is conceivable that the CMBR would not have been as consistent as it is now.

4. The shape of the Universe could be altered.

1. Redshift instead of blue shift would be observed in light from distant galaxies. As a result, the light's wavelengths would be shorter than when it was emitted, indicating that the galaxy's distance was decreasing rather than increasing.

2. The Universe's age would be shorter. The time it takes for light to travel a certain distance is proportional to the distance it has traveled, according to the speed of light. As a result, if the Universe is shrinking, the light from distant objects has traveled less than it would if the Universe were expanding. As a result, the age of the Universe would be shortened.

3. The expansion of the Universe is one of the main reasons for the cosmic microwave background's uniformity. The CMBR is a form of radiation that fills the Universe and is leftover from the Big Bang. The uniformity of the CMBR suggests that the Universe was homogenous at the time it was created. If the Universe had shrunk, it is conceivable that the CMBR would not have been as consistent as it is now.

4. The shape of the Universe could be altered. When the Universe expands, it becomes flatter, and when it contracts, it becomes rounder. The Universe's shape is determined by the matter, energy, and curvature of space-time in it. It's possible that if the Universe shrank, it would become more curved.

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s=vt

s=6m/s×600s

s=3600m

The correct answer from each drop-down menu is thermal energy moves from A to B by conduction the heat transfer will continue until the liquid in B reaches the same temperature as the liquid in A.

Good thermal conductors have an atomic or molecular arrangement that has the property of transferring heat to nearby atoms or molecules until the entire object is in thermal equilibrium. To understand better, let's take a metal bar as an example, which is a good thermal conductor.

In this case, the  thermal energy moves from A to B by conduction the heat transfer will continue until the liquid in B reaches the same temperature as the liquid in A.

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The car could maintain its speed for approximately 250 hours, assuming the batteries are fully charged.

To determine how long a car can maintain a certain speed while driving at an angle, we would need additional information regarding the car's specifications, such as its power, battery capacity, energy consumption rate, and efficiency. Without these details, it's not possible to provide a specific answer.

However, I can give you a general concept. The time the car can maintain a certain speed will depend on the available energy stored in the batteries and the rate at which the car consumes energy while driving at that speed and angle.

If we know the car's energy consumption rate (measured in units such as watt-hours per kilometer or kilowatt-hours per mile), and the battery capacity (measured in units such as kilowatt-hours), we can estimate the time the car can maintain the speed.

For example, if we know the car's energy consumption rate is 200 watt-hours per kilometer and the battery capacity is 50 kilowatt-hours, we can calculate the time as follows:

Time (in hours) = Battery Capacity (in kilowatt-hours) / Energy Consumption Rate (in kilowatt-hours per hour)

In this example:

Time = 50 kilowatt-hours / 0.2 kilowatt-hours per hour

Time = 250 hours

So, the car could maintain its speed for approximately 250 hours.

Please note that this is a simplified example, and in reality, there are various factors that can affect the range and duration of an electric vehicle, such as terrain, driving conditions, temperature, and driving style. Additionally, electric cars often have sophisticated energy management systems that optimize efficiency and range.

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Iron oxide cement produces bright-red and yellow colors in some sandstones.

The coloration in sandstones is often influenced by the presence of different minerals and pigments in the cement that binds the sediment grains together. Iron oxide, specifically hematite (Fe2O3) and goethite (FeO(OH)), is a common cementing material found in sandstones. When present in higher concentrations, these iron oxide minerals can impart bright-red and yellow hues to the sandstone.

The colors of iron oxide cement in sandstones are a result of the selective absorption and reflection of light. Hematite and goethite have specific light absorption properties that allow them to absorb certain wavelengths of light, particularly in the blue and green regions of the visible spectrum. As a result, the sandstone appears red or yellow, as these colors are the wavelengths of light that are not absorbed and are instead reflected or transmitted.

The specific shades and intensity of red and yellow colors in sandstones can vary depending on factors such as the concentration of iron oxide minerals, grain size, and the presence of other minerals or impurities. Different geological processes and environmental conditions during the formation of sandstones can contribute to the variation in coloration.

The bright-red and yellow colors observed in some sandstones are typically caused by the presence of iron oxide cement, specifically hematite and goethite. The selective absorption and reflection of light by these minerals result in the sandstone appearing red or yellow. The exact coloration may vary based on factors such as the concentration of iron oxide, grain size, and geological processes involved in the sandstone's formation.

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The following information is provided in the problem: A sled with a weight of 19.7 kg is pulled with a force of 42.0 N at an angle of 43.0° across ground where μ₁ = 0.130. We need to find out the normal force that is exerted on the sled.

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Opera seria is a style of Baroque opera that originated in Italy. It emerged in the early 18th century and was particularly popular in the cities of Venice, Naples, and Rome.

Opera seria is characterized by its serious and heroic subject matter, elaborate vocal ornamentation, virtuosic singing, and arias that showcased the technical skills of the singers. Composers such as George Frideric Handel, Alessandro Scarlatti, and Johann Adolph Hasse were notable contributors to the development and popularity of opera seria.

The term "opera seria" literally means "serious opera" in Italian. The style was characterized by a focus on serious, heroic, and often mythological or historical subjects, with arias that showcased the virtuosity of the singers. The music was typically complex and highly structured, featuring recitative passages that advanced the plot and da capo arias that allowed singers to embellish and elaborate upon the musical themes.

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The model v=0.15(2.7)^t is an exponential growth model with a growth factor of 2.7.

The given model v=0.15(2.7)^t can be classified as exponential growth because the base of the exponent (2.7) is greater than 1. This means that as t increases, the value of v increases exponentially.

The growth factor of the model is 2.7, which represents the factor by which v increases with each unit increase in t. In other words, for each additional unit of time, v grows by a factor of 2.7. This value can also be referred to as the "multiplicative factor" or "growth rate" of the exponential growth model.

Therefore, the model v=0.15(2.7)^t is an exponential growth model with a growth factor of 2.7.

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Assume you have a sealed jug that only contains air. If you heat the air in the jug it will have a higher temperature.  Air Pressure properties of air will change.

What is  Pressure?

The force delivered perpendicularly to an object's surface per unit area across which that force is dispersed is known as pressure. In comparison to the surrounding pressure, gauge pressure is the pressure. Pressure is expressed using a variety of units.

The number of atoms of air in the sealed container cannot change. Assuming that the container does not expand when heated, the volume of the container cannot change when it is heated. If neither the mass nor the volume change as the can is heated, neither can the density change.

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Two oxygen atoms would share the negative charge.

There are some compounds in which a single structure is insufficient to explain the properties of the compound. In that case, we have to involve a number of other structures which contributes to the overall structure of the molecule to different extents.

The arrows are used to show the transformation of the structures of the compounds. Looking at the structures as it has been shown here, we know that the oxygen atoms that would be involved in the resonance are the oxygen atoms that are in the conjugated system.

There are two oxygen atoms in the conjugated system hence they will share the  negative charge.

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Answer:

106.8

Explanation:

If you multiply 6 and 17.8, you'll get 106.8.

If that's wrong, my apology's !

Answer:

 F =  5.33 10⁻⁶ N   ,        directed to the left

Explanation:

For this exercise we will use the force addition law where each force is electric given by Coulomb's law

           F = ∑ F

           F = F₁₃ + F₂₃

where the force is given by

           F = k q₁ q₂ / r₁₂²

in our case

           F₁₃ = k q₁ q₃ / r₁₃²

           F₂₃ = k q₂ q₃ / r₂₃²

            F = k q₃ (q₁ / r₁₃² + q₂ / r₂₃²)

as the charges are of the same sign the electric force is repulsive and due to the position of the charges it is directed to the left

let's calculate

           F = 9 10⁹ 8 10⁻⁹ (3 10⁻⁹ / (0.26 - 0) 2 + 6 10⁻⁹ / (0.45-0) 2)

           F = 72 (44,379 + 29,630) 10⁻⁹

           F =   5.33 10⁻⁶ N          

directed to the left

Answer:

The astronaut's mass is 16 kg.

Explanation:

Mass can be defined as a measure of the amount of matter an object or a body comprises of. The standard unit of measurement of the mass of an object or a body is kilograms.

Irrespective of the location of an object or a body at a given moment in time, the mass (amount of matter that they're made up of) is constant. This ultimately implies that, whether you're in the moon, space, earth or any other place, your mass remains the same (constant).

Therefore, if an astronaut has a mass of 16 Kg on Earth, his mass on the moon and on the space station would remain the same, as his original mass of 16 Kg because mass is indestructible.

The length of the rubber band that the boy must use is 0.024 m or 24 mm.

To determine the length of the rubber band, we can use the formula for the potential energy stored in a stretched spring, which is also applicable to a stretched rubber band:

where U is the potential energy stored in the rubber band, k is the spring constant (or in this case, the rubber band constant), and x is the displacement of the rubber band from its natural length.

Since the rubber band is stretched by 0.25 of its natural length, the displacement x is 0.25 times the natural length of the rubber band.

We can solve for the rubber band constant k by using the formula for the velocity of a projectile launched by a spring (or in this case, a rubber band):

where v is the velocity of the projectile, m is the mass of the rubber band, M is the mass of the projectile, and k is the spring constant. We can rearrange this equation to solve for k:

k = (v² M) / (2 m)

We can now combine the two equations to solve for the length of the rubber band, L:

U = 1/2 k x²

U = 1/2 ((v² M) / (2 m)) (0.25 L)²

U = (v² M L²) / (32 m)

The potential energy stored in the rubber band must be equal to the kinetic energy of the projectile when it is launched:

U = 1/2 M v²

(v² M L²) / (32 m) = 1/2 M v²

L = ((16 m v²) / (k M))

L = ((16 m v²) / ((v² M) / (2 m) M))

L = √(32 m^2 / M)

L = (0.032 M)

Substituting the given values, we get:

L = √(0.032 * 0.006)

L = 0.024 m

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Answer:

No.

Explanation:

if it's in equilibrium then the torque or moment of inertia on both sides should cancel.

Torque is a vector quantity, force times distance.

When doing these, make sure your units are the same by changing centimeters to meters first.

Left side is 400N * (-2.5m) = -1000 Nm

Right side is 300N * (3.5m) = 1050 Nm

-1000 Nm + 1050 Nm does not equal zero so there's a torque on the teeter and it will rotate clockwise. The system is not yet in equilibrium.

Cold climate favors rapid mechanical weathering, since the cold seasons cause the rock to contract.

Mechanical weathering, sometimes referred to as physical weathering and disaggregation, causes rocks to break down. Water, whether liquid or solid, is usually present during mechanical weathering. For instance, liquid water can seep through fractures and fissures in rock.

Cold climates promote mechanical weathering because they force rocks to contract and compress during the colder months. The rocks degrade and break at higher temperatures. Temperature fluctuations cause the expansion and contraction of rock (with cold). As this continues repeatedly, the structure of the rock deteriorates. It breaks down over time.

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The percentage of mammalian proteins that are glycosylated is 50%. The correct answer is option D).

Glycosylation is a process in which proteins are attached to sugar molecules in order to modify their function. This is a common post-translational modification that occurs in both eukaryotic and prokaryotic cells. In mammals, glycosylation is thought to occur in approximately 50% of all proteins, making it a common and important process for regulating protein activity.

Most glycosylated proteins are found on the cell surface, where they play an important role in cell signaling, cell adhesion, and other cellular functions. Other glycosylated proteins are found within cells, where they may regulate gene expression, protein folding, and other cellular processes. In general, glycosylation is a complex and highly regulated process that plays a critical role in maintaining cellular homeostasis and ensuring that proteins function properly.

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