Subtract 5.01x10^7-30x10^-9

Final answer:

Understanding momentum and speed is crucial for designing Rube Goldberg projects, which are complex devices executing simple tasks. Momentum involves the mass and velocity of an object, while speed measures how fast an object moves.

Explanation:

The question involves concepts of momentum and speed, crucial in understanding the dynamics of a Rube Goldberg project. Rube Goldberg machines are intricate, often complicated devices that perform a simple task in a roundabout way, usually involving a series of chain reactions. Understanding momentum and speed is essential for designing these machines effectively.

Momentum is a measure of an object's motion, calculated as the product of an object's mass and its velocity. It's a vector quantity, which means it has both magnitude and direction. A fascinating example of momentum in action is the experiment where a ping-pong ball and a baseball are stacked and dropped, demonstrating how momentum transfer can cause the ping-pong ball to shoot upwards at high speed after the baseball bounces.

Speed, on the other hand, is the rate at which an object moves along a path. It's a scalar quantity, indicating it has only magnitude without direction. In Rube Goldberg projects, varying the speed of objects can influence the timing and sequence of events, making an understanding of this concept crucial for the timing aspects of your machine.

To incorporate these principles into a Rube Goldberg project, consider designing a segment where the transfer of momentum between objects is visible, like a series of dominos falling. Also, manipulating the speed of different segments can add an element of surprise or ensure the sequential activation of different parts of your machine.

To increase the concentration of chloroform, you should increase the concentration of Cl2 and remove HCl from the reaction mixture. Increasing [HCl] or changing the reaction rate do not directly increase the chloroform concentration.

To increase the concentration of chloroform (CHCl3) as Cl2 gas reacts with CH2Cl2, several factors can be manipulated according to Le Chatelier's Principle:

The rate of reaction can indeed be changed by modifying the reaction conditions such as concentration of reactants, temperature, pressure (for gases), or by adding a catalyst.

Increasing [HCl] is not likely to increase the concentration of chloroform because HCl is a product of the reaction between Cl2 and CH2Cl2, and adding more would typically shift the equilibrium to the left, favoring the reactants. The rate of the reaction can be increased by increasing the concentration of Cl2 but this does not necessarily mean that the concentration of chloroform will increase without also removing produced HCl.

Answer:

Yea the girl above me is correct

Explanation:

Answer:

c

Explanation:

Sound travels in waves, option C will be the correct answer where it is impossible to hear sounds.

There are different properties of sound like pitch which is an important property where the perception of frequency of sound occur by human ear within a specific the range of human hearing.

The loudness of sound can be another property which can be determined by amplitude of the sound a measure of the magnitude of the maximum disturbance of sound.

The speed of the sound can be determined  as  the sound waves travel through the medium  and it is different for different mediums, travels fastest in solids.

When sound waves hit the solid surface  it reflects back to the same medium as it follows laws of reflection, Timbre is the another  property of sound which is used to differentiate sounds of the same frequency.

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The object with a density of 1.3 g/mL will float in any liquid that has a density higher than 1.3 g/mL due to the principle of buoyancy.

The solid object, with a density of 1.3g/mL, will float in any liquid that has a density higher than 1.3 g/mL. The object’s ability to float depends on the principle of buoyancy, which states that the buoyant force exerted on an object immersed in a fluid is equal to the weight of the fluid displaced by the object. In simpler terms, if the object has a lower density than the fluid it is placed in, it will float as the buoyant force will be greater than the object's weight.

For instance, say you have a liquid with a density of 1.5 g/mL. The object's density is 1.3 g/mL which is less than that of the liquid. Therefore, the object will float in this liquid. Conversely, if the liquid's density is less than 1.3 g/mL, the object will sink as its density is greater.

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Answer: a. same quantities

Explanation: According to avogadro's law, 1 mole of every substance contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.  

Molecular weight of [tex]H_2[/tex] = 2.0 g/mol

To calculate the moles, we use the equation:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}[/tex]

[tex]\text{Number of moles}=\frac{2g}{2g/mol}=1 mole[/tex]

Now 1 mole of [tex]H_2[/tex] molecule contains = [tex]6.023\times 10^{23}[/tex] of molecules.

Thus both represent same quantities.

Final answer:

Ethanol has a much higher boiling point than ethene mainly due to the ability to form hydrogen bonds, which require additional energy to break, and also due to increased van der Waals dispersion forces resulting from the extra electrons of the oxygen atom and the molecule's size.

Explanation:

The reason ethanol has a higher boiling point than ethene is mainly due to the presence of hydrogen bonds, which are a type of strong intermolecular force. Ethanol's molecular structure allows it to form hydrogen bonds because it contains a hydroxyl group (-OH) with a highly electronegative oxygen atom that can attract hydrogen atoms from other ethanol molecules.

These hydrogen bonds require additional energy to break, significantly elevating the boiling point of ethanol compared to ethene, which lacks this functional group and can only exhibit weaker van der Waals forces.

In addition to hydrogen bonding, ethanol's larger size and the extra electrons brought by the oxygen atom also increase the van der Waals dispersion forces within the substance, contributing to a higher boiling point. Comparing ethanol to propane, which has a similar length and number of electrons but lacks the hydroxyl group, shows that hydrogen bonding is a key factor since ethanol has a boiling point about 100°C higher.

Overall, the presence of hydrogen bonds, accompanied by van der Waals dispersion forces, results in ethanol requiring more energy to transition from liquid to gas, thereby leading to its higher boiling point.

This is acid-base reaction:

NaOH (aq) + HCl (aq) = H2O (l) + NaCl (aq)

After the water evaporated from reaction, NaCl (salt) remains.

In a reaction involving sodium hydroxide and hydrochloric acid, sodium chloride will remain after evaporation of all the water from the reaction mixture.

It is a reaction involving acids and bases to form salt and water.

The reaction involving sodium hydroxide and hydrochloric acid is shown in the equation below:

[tex]NaOH + HCl -- > NaCl +[/tex] [tex]H_2O[/tex]

Sodium chloride and water is formed and once all the water is evaporated off from the mixture, the sodium chloride is left.

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Answer: 1.14

Explanation:

The pOH of a solution where the [OH-] is 7.3 x 10-² M is 1.14.

HOW TO CALCULATE pOH.

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Certain characteristics of metal make it a necessary material for electricians.

Metals are good at conducting electricity. This means that metals are feasible for electricity to travel through them. Generally, all metals are useful in electric work.

Because metals are compatible with electricity, they are crucial for making electrical wires for appliances and other usages. This is the reason that they are preferred by electricians.

Metals have an abundance of electrons. So their outer orbits carry free electrons. And as we know, electrons are the carriers of electricity. They easily get heated up.

Non-conductors of electricity include wood, air, glass, and cotton. Even pure water is non-conductive. That means electricity cannot travel through them.

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In an ecosystem, canyons are formed by water breaking the rocks into pieces.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.There are different ecosystems present in the environment.

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Boyle's law says "the pressure of a fixed amount of an ideal gas is inversely proportional to its volume when the temperature is constant".

P α 1/V

Where P is pressure of the gas and V is the volume of the gas.

Hence, we can use Boyle's law for two different situations as,

P₁V₁ = P₂V₂

P₁ = 100.0 kPa = 1 x 10⁵ Pa
V₁ = 3.3 L
P₂ = 90 x 10³ Pa
V₂ =?

By substitution,
    1 x 10⁵ Pa x 3.3 L = 90 x 10³ Pa x V₂
                            V₂ = 3.7 L

Hence, if the pressure drops from 100 kPa to 90 kPa, then the volume of the gas will be 3.7 L.

Here, we made an assumption as the gas is an ideal gas.

Final answer:

To determine the new volume of the gas when the pressure changes, we apply Boyle's Law, which leads to a calculation showing that when the pressure decreases from 100.0 kPa to 90.0 kPa, the volume will increase from 3.3 L to 4.07 L at constant temperature.

Explanation:

The student's question pertains to the behavior of a gas inside a balloon when the pressure exerted on it changes at constant temperature. To solve this problem, we can use Boyle's Law, which states that for a given mass of an ideal gas at constant temperature, the pressure and volume of the gas are inversely proportional. Mathematically, this can be written as P1V1 = P2V2.

Given the initial conditions, the pressure P1 is 100.0 kPa and the initial volume V1 is 3.3 L. The final pressure P2 is 90.0 kPa. We want to find the new volume V2. By rearranging the formula to solve for V2, we get V2 = (P1V1)/P2.

Substituting the values we have: V2 = (100.0 kPa * 3.3 L) / 90.0 kPa = 366.7 L/kPa / 90.0 kPa = 4.07 L.

Therefore, when the pressure is decreased to 90.0 kPa, the balloon will occupy a volume of 4.07 L.

Tectonic plate movements at convergent, divergent, and transform boundaries form various features: divergent boundaries create mid-ocean ridges, convergent boundaries result in subduction zones and mountain ranges, while transform boundaries lead to faults and earthquakes.

Earth'al-slipping earthquakes and offset rivers.s crust is dynamic, with tectonic plate movements giving rise to various geological features at convergent, divergent, and transform boundaries. At divergent boundaries, such as mid-ocean ridges, plates move apart and new crust is formed via upwelling magma that cools to become lithospheric rock. In contrast, convergent boundaries are locations where plates are moving toward each other, leading to subduction zones, trenches, mountain ranges, and volcanic activity. The transform fault boundaries are characterized by lateral movement of plates creating faults and leading to frequent earthquakes.

Divergent boundaries most commonly create mid-ocean ridges and new oceanic crust, with ridge push playing a role in plate motions. Convergent boundaries can form deep ocean trenches, mountain ranges, volcanic arcs, and earthquake zones, typified by the destruction of crust as one plate subducts under another. For transform boundaries, crust is neither created nor destroyed but can result in distinctive offset geological features, such as through later

The temperature can change the solubility of a solute. Option A is correct.

For many solids that are soluble in liquid water, solubility increases as the temperature increases. The higher the temperature, the more kinetic energy the solvent molecules have available to break down the intermolecular bonds that hold the solute molecules together.

The solubility depends on the solution's temperature. For example, salt solubility increases with increasing temperature whereas calcium sulfate solubility decreases with increasing temperature.

At high temperatures, solubility is high, so the solution dissolves more solute. When the solution cools, solubility decreases, causing the solute to separate out as a solid.

Therefore the correct answer is option A.

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The question is incomplete. The most probable question is given below:

The chart shows the solubility of different substances.

A 3-column table with 6 rows. The first column labeled solute has entries sugar, sugar, salt, salt, nitrite salt, and nitrite salt. The second column labeled temperature has entries 20 degrees C, 100 degrees C, 20 degrees C, 100 degrees C, 20 degrees C, and 100 degrees C. The third column labeled grams per 100 grams of water has entries 204, 487, 36, 39, 81, 160.

Which statement is represented by the graph?

A.) Temperature can change the solubility of a solute.

B.) Temperature has no effect on the solubility of a solute.

C.) Salt has a greater solubility than sugar.

D.) Nitrite salt has a greater solubility than sugar.

In living organisms.

Answer:

A. Mercury has very little atmosphere, but Earth has an atmosphere consisting of oxygen.

Explanation:

Mercury does not have any moon while the Earth has one. Mercury does not have liquid water while 70% of the Earth is covered with water. Mercury has extreme variations of temperature due its close proximity to the Sun. The dark side has extremely low temperature while the lit has has extremely high temperature. The Earth has moderate temperature of about 14 degrees which sustains life.

Mercury has extremely weak atmosphere; probably its has captured some solar wind particles. It comprises of helium, hydrogen, calcium, oxygen etc. Earth has thick atmosphere primarily composed of Nitrogen and Oxygen.

Question: "Which describes an alkaline solution?"

Answer: C.) basic

Window cleaner is ammonia dissolved in water. This is an example of a _______.

Granite is a heterogeneous mixture, not a pure substance. It includes minerals like quartz, mica, and feldspar, all with different chemical and physical properties.

Granite is not a pure substance; it is a mixture. More specifically, it is a heterogeneous mixture, as there are multiple substances that make up granite that are not uniformly distributed. This includes minerals like quartz, mica and feldspar. Each of these minerals have different chemical and physical properties, making granite a mixture rather than a pure substance.

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