Answer is false
Explanation:
because they can't do that
the formula for sodium sulfide is na2s what does it mean
Final answer:
The formula Na₂S means that there are two sodium ions paired with one sulfide ion to create a neutral ionic compound. Sodium ions carry a 1+ charge and sulfide ions have a 2- charge, so two sodium ions are required to balance out one sulfide ion, leading to the formula Na₂S.
Explanation:
The formula for sodium sulfide, Na₂S, represents an ionic compound formed between the sodium cation, Na⁺, and the sulfide anion, S²⁻. To predict the compound's formula, you must consider that sodium tends to form a 1+ ion, while sulfur forms a 2- ion.
For the charges to balance and the compound to be electrically neutral, two sodium ions are needed for every sulfide ion. As a result, the chemical formula Na₂S indicates that there are two sodium ions for every one sulfur ion in the compound.
To balance the positive and negative charges, remember that the total charge in the compound must equal zero. In the case of sodium sulfide, two Na⁺ ions (each with a +1 charge) will balance one S²⁻ ion (with a -2 charge), resulting in a neutral compound.
Thus, we write Na₂S instead of NaNaS, which is the simplified formula as per chemical convention.
limestone is an example of a chemical sedimentary rock. describe how limestone may form
it takes a car 1.75h to go from mile marker 10 to mile marker 115. What is the average speed of the car
A 1.6
B65
C183
D60
The average speed of the car for the given distance and time is 60 mph.
The given parameters;
time of motion of the car, t = 1.75 hinitial position, x₁ = 10 milesfinal position, x₂ = 115 milesThe average speed of the car is determined by dividing the total distance by total time of motion as shown below;
[tex]average \ speed = \frac{total \ distance}{total \ time} \\\\average \ speed = \frac{115 - 10}{1.75} \\\\average \ speed = 60 \ mph[/tex]
Thus, the average speed of the car for the given distance and time is 60 mph.
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The accepted standard measurement for mass is the A) liter. B) pound. C) Newton. D) kilogram.
The accepted standard measurement for mass is kilograms, while the pound is the local measurement used in western countries,
therefore the correct answer is option D.
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
The accepted standard measurement for mass is kilograms.
The accepted standard measurement for force is Newtons.
While on the other hand liter is the commonly used unit for the measurement of a fluid substance such as liquid or gas.
Thus, the correct answer is option D.
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Which option is a scientifically accurate description of velocity?
A. The golf pro missed the shot even though the ball was only one meter away from the cup.
B.With just two second left on the clock, the basketball player moved quickly down the court to sink the ball in the basket.
C.The skier traveled downhill along the 80-meter track to the finish line in just 3.5 seconds to win the competition.
D. After traveling at 120 kph for the entire 30-minute race, the racecar driver ended the race at the same point she started.
the answer is choice C i took the test and i got it right good luck
Why are chemical properties harder to observe than physical properties?
A carmaker has designed a car that can reach a maximum acceleration of 12 meters/second2. The car’s mass is 1,515 kilograms. Assuming the same engine is used, what should the car’s mass be if the carmaker wants to reach an acceleration of 15 meters/second2? Use F = ma.
A 1,212 kg
B 1,335 kg
C1,466 kg
D 1,515 kg
D 1,894 kg
A carmaker has designed a car that can reach a maximum acceleration of 12 meters/second². The car’s mass is 1,515 kilograms. Assuming the same engine is used, the car’s mass should be 1212 kg if the carmaker wants to reach an acceleration of 15 meters/second²
What is Newton's second law?Newton's Second Law states that The resultant force acting on an object is proportional to the rate of change of momentum.
The mathematical expression for Newton's second law is as follows
F = m*a
where F represents the force applied
m is the mass of the object
a is the acceleration of the object
As given in the problem A carmaker has designed a car that can reach a maximum acceleration of 12 meters/second². The car’s mass is 1,515 kilograms.
The force produced by the car
F= ma
By substituting the respective values of mass and acceleration
F = 1515 ×12
F= 18180 N
As mentioned in the problem if we have to increase the acceleration to 15 meters/second² by keeping the engine the same, means the force developed by the car is the same
F= m×15
18180=15m
m = 1212 kg
Thus, the car’s mass should be 1212 kg if the carmaker wants to reach an acceleration of 15 meters/second²
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This is the third most abundant gas in the atmosphere This is from a crossword puzzle and it has 5 letters.
The third most abundant gas in the Earth's atmosphere is argon, which makes up about 0.9% of the atmosphere by volume. It follows nitrogen and oxygen in abundance.
Argon, despite its relatively low profile in discussions about Earth's atmosphere, holds a significant presence as the most abundant noble gas. Comprising approximately 0.93% of the atmosphere, its inert nature lends stability to atmospheric composition. Unlike reactive gases such as oxygen and nitrogen, argon remains unreactive, contributing to atmospheric equilibrium. Its prevalence, though often overlooked, underscores its crucial role in maintaining atmospheric stability and composition.
Which type of soil is the most permeable?
A. sand
B. silt
C. loam
D. clay
The type of soil that is the most permeable is sand. The correct option is option (A). Permeability refers to the ability of soil to allow water or other fluids to pass through it.
Permeability refers to the ability of soil to allow water or other fluids to pass through it. Sand has larger particles with more space between them, which creates larger pore spaces for water to flow through easily. This leads to high permeability in sandy soils.
On the other hand, silt, loam, and clay have smaller particles and tend to have more compacted structures with smaller pore spaces. This results in lower permeability compared to sand. Silt has intermediate permeability, while loam and clay typically have lower permeability.
Therefore, sand is the most permeable among the given options. The correct option is option (A).
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Mass = 567.5 g Volume = 50.0 cm3 What is the density of lead? 1.135 g/cm3 11.35 g/cm3 113.5 g/cm3 1,135 g/cm3
Answer:
b
Explanation:
In some areas of the world, like California and Japan, earthquakes are a common occurrence. How can this best be explained?
A) The strong ocean currents are undermining both areas causing earthquakes.
B) Both areas are subjected to strong ocean wind and waves that causes earthquakes.
C) Both areas are located near the edge of the Pacific Ocean, the unstable sand causes earthquakes.
D) Both areas are on the boundary of active plate margins, the motion of the plates causes earthquakes.
Do you hear sounds around you as one frequency at a time or as many frequencies at once?
Plz help
two kids are roller skating. Amy with the mass of 55kg, traveling at 3m/s. Jenny who has a mass of 40kg is traveling at 5m/s in the opposite direction. they crash into each other and hold onto each other so now they are skating together,how fast are they traveling?t
m1v1+m2v2=(m1+m2)=v
is the equation needed for this, I need help with how to do the steps,it's on my review,please help and thank you!
Inertia describes which of the following?
1. how long an object is
2. how large an object is
3. how difficult it is to change an object's motion
4. how fast an object is moving
Inertia describes how difficult it is to change the motion of an object. So, the correct option is (C).
What is Inertia?The word inertia comes from the Latin word inerus, which means inert, sluggish. It can also refer to the resistance of any physical object to a change in velocity.
Inertia is described as an object that will continue its current motion unless some force causes it to change its speed or direction. Newton described the principle of inertia in his first law of motion. It is a tendency to do nothing or to remain unchanged.
According to Newton's first law of motion (inertia), an object remains at rest, and an object in motion will remain in motion at a constant speed and in a straight line unless acted upon by an unbalanced force.
Thus, Inertia describes how difficult it is to change the motion of an object. So, the correct option is (C).
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you could use an elevator or stairs to lift a box to the tenth floor. Which has greater energy? Why?
There are several general steps in the engineering ____ process. The first step in the engineering design process is to _____ the problem. Next, _______ the problem and consider any ____ (or limitations) for the design. Consider all ____ and select an approach that best fits the problem. This is often done by ____ with a group of people. Build a ___ of the design and ____ it. Based on the tests of the prototype, go back and ____ the ___
Vocabulary words:
Brainstorming
Constraints
Design
Design
Identify
Possible Solutions
Prototype
Refine
Research
Test
The general steps in the engineering design process include identifying the problem, researching constraints, brainstorming possible solutions, building a prototype, and refining the design.
Explanation:The subject of this question is Engineering and the grade level is High School.
The general steps in the engineering design process are identified as follows:
Identify the problem.Research the problem and consider any constraints for the design.Consider all possible solutions and select an approach that best fits the problem. This is often done by brainstorming with a group of people.Build a prototype of the design and test it.Based on the tests of the prototype, go back and refine the design.Learn more about Engineering here:https://brainly.com/question/19117846
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what happens to a muscle when you exercise it?
Answer:
More blood is pumped to the exercising muscles to deliver that additional O
Explanation:
The planet Venus, our moon, and Halley's Comet all
A.) Are larger than the earth
B.) are composed of primarily hydrogen.
C.) change speed dramatically as they orbit.
D.) have highly predictable orbits around the sun.
Answer: The correct answer is Option D.
Explanation:
Venus is the second planet of our solar system and is similar in size as compared to Earth. It's atmosphere is mainly composed of carbon dioxide with minor amounts of nitrogen. This planet have a fixed orbital time around the sun which is 225 days.
Moon is the natural satellite of Earth and is smaller than Earth. It is composed of mainly oxygen, silicon, magnesium, iron, calcium, and aluminum. The orbital period of moon around Sun is 29.5 days.
Halley's Comet is a comet which is very small as compared to Earth and is composed of water, carbon monoxide, carbon dioxide and other ices. It appears in every 75-76 years.
Hence, all of the above have highly predictable orbits around the Sun. Therefore, the correct answer is Option D.
Which of the following is the correct SI unit to use in measuring the mass of a boulder?
Answer:
kilogram (kg)
Explanation:
Mass is the opposing effect that a body posses which inhibits the motion of the body when a force is applied.
SI unit is the standard of unit which stands for Système international (d'unités) in French and International System of Units in English. The International System of Units comprises of the following base units kilogram, Ampere, Kelvin, mole and candela.
So, the mass of the boulder would be measured in kilogram (kg).
This is a graph of a marble traveling across a smooth surface. What is the average speed of this marble?
Answer:
v = 1.5 m/s
Explanation:
The attached figure shows a distance time graph. The motion of marble is uniform. It covers equal distance in equal interval of time. The average speed of the car is calculated by finding its slope in d-t graph.
From the attached figure,
[tex]d_1=6\ m[/tex]
[tex]d_2=3\ m[/tex]
[tex]t_1=4\ s[/tex]
[tex]t_2=2\ m[/tex]
Slope of the graph is given by :
[tex]slope=\dfrac{d}{t}=\dfrac{d_1-d_2}{t_1-t_2}[/tex]
[tex]slope=v=\dfrac{6-3}{4-2}[/tex]
v = 1.5 m/s
So, the average speed of this marble is 1.5 m/s.
To maintain your body temperature your body converts chemical potential energy into thermal energy true or false
Answer:
The Given Statement is TRUE.
Potential energy is energy possed by an object according to its position with respect to others.
Thermal energy is energy that object gets from heat.
Body converts the energy stored in the food into thermal energy by digesting the food. So, to maintain our body temperature body coverts potential energy into thermal energy.
Then this energy enters in blood and reaches the muscles and the brain and keep them functioning.
When finding the ideal mechanical advantage (IMA), the negative force not being included is ___.
Answer:
When finding the ideal mechanical advantage (IMA), the negative force not being included is friction.
Explanation:
Mechanical Advantage is the ratio between the force exerted by a mechanism and the force applied to it. The simplest example is the lever, where the ratio of forces is equal to the ratio between the lengths of the lever arms. Another example is the system formed by rope and pulley. If the rope passes twice between the upper and lower pulleys, then the mechanical advantage is four to one.
In situations where the ideal mechanical advantage is found, there is a negative force not included, that force is friction.
why do electrons move from the negative end of the tube to the positive end? please help
Final answer:
Electrons move from the negative to the positive end in a tube due to the electric field created by the potential difference, attracting the negatively charged electrons towards the positive charge. The power source or battery maintains this potential difference, and the motion of electrons is also influenced by thermionic emission in cathode ray tubes.
Explanation:
Electrons move from the negative end to the positive end of a tube because they are negatively charged and are attracted to the positive charge. This movement is due to the electric field created by the potential difference between the negative and positive ends. When electrons travel through conductors, such as metal wires, they encounter resistance from other electrons, atoms, and impurities, losing energy along the way. To maintain their motion, there must be a force, supplied by the electric field, which points from the higher potential to the lower potential end. Since electrons are negatively charged, they move in the direction opposite to the electric field.
In many real-world applications, including electronic circuits and vacuum tubes, the force driving electron movement is the electric potential difference, or voltage, between two points. This potential difference is often created by a battery or other power source, which functions as an electromotive force (emf) source. It moves the negative charges from the positive terminal to the negative terminal, thereby maintaining the potential difference.
Additionally, in cathode ray tubes, electrons are emitted from the cathode due to thermionic emission, where heat causes the detachment of electrons. Both the repulsion from the negatively charged cathode and the attraction to the positive anode encourage electrons to move toward the anode. However, this force is not purely due to attraction and repulsion; it is also influenced by the thermionic effect, which is based on heat-induced motion.
The release of a gas from a chemical reaction is very quick. A scientist wants to measure what is released, but in small increments. what would allow the scientist to change the rate of the reaction so the results could be measured.
The CORRECT answer is B.
Answer:
an inhibitor
Explanation:
Just took the test
what natural processes can shape rock in such a curious way
Natural processes that can shape rock in curious ways include weathering, erosion, deposition, tectonic activity, and volcanic activity. These processes work together in the rock cycle to form different types of rocks like igneous, sedimentary, and metamorphic rocks in various environments simultaneously.
The rock cycle begins with the formation of igneous rock, which forms when magma cools and solidifies. This can happen below the Earth's surface, forming intrusive igneous rocks with large crystals due to slow cooling. Conversely, if magma erupts from a volcano and cools rapidly on the surface, it forms extrusive igneous rocks with smaller crystals. Over time, these igneous rocks can be broken down by weathering and eroded away by wind, water, ice, or gravity. The eroded particles are then transported and eventually deposited, often in layers, and compacted to form sedimentary rock. With the right conditions, such as high temperatures and pressures, these rocks can undergo metamorphosis, transforming into metamorphic rock. Moreover, due to tectonic processes, rocks can be subducted into the mantle where they melt and the cycle starts anew.
Tectonic processes such as the movement of the Earth's plates can lead to the formation of volcanic features. For instance, when two plates diverge at a plate boundary, magma can rise and solidify to form new crust, which may include volcanic islands. Additionally, hotspots, areas of intense heat in the mantle that are stationary relative to the moving tectonic plates, can also form volcanic structures as the plates move over them. The type of melt process occurring can vary depending on the location and conditions; some areas may experience partial melting of the mantle, whereas others might involve the melting of subducted sedimentary rocks leading to different volcanic products and features.
Why are the valence electrons of carbon important?
The valence electrons of carbon determine its chemical behavior. They allow carbon to form multiple bonds and create the complexity of organic chemistry, forming the backbone of many organic molecules. The number of valence electrons also affects the stability and reactivity of carbon compounds.
Explanation:The valence electrons of carbon are important because they determine the chemical behavior of the element. Carbon has 4 valence electrons, which allow it to form multiple bonds with other elements, making it the basis for the complexity of organic chemistry.
For example, the ability of carbon to form covalent bonds with other carbon atoms allows for the formation of long chains and rings, creating the backbone of organic molecules. This versatility enables carbon to form a vast number of compounds, including carbohydrates, proteins, and DNA.
Furthermore, the number of valence electrons influences the stability and reactivity of carbon compounds. It helps determine the types and strengths of the chemical bonds formed, which affects their properties and how they interact with other molecules.
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Since Mars is smaller, how can it have an equal landmass?
With a smaller mass, objects should be denser in order to have an equal landmass.
What is landmass?A landmass is actually defined as the area covered by a solid layer. The phrase is frequently used to describe areas of land enclosed by water, such as a continent or sizable island. A landmass is an identified portion of the continental crust that rises above sea level in the science of geology.
Mars should be denser if it has an equal landmass. But in reality, its landmass is not equal 'cause its density is about 72% of that of earth. Mars is the second-smallest planet in the Solar System and the fourth planet from the Sun. It is just larger than Mercury.
Therefore, with a smaller mass, objects should be denser in order to have an equal land mass.
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Glacial episodes are an example of
Rounded to the nearest whole number, what is the atomic mass of platinum? 78 117 195 273
Answer: The atomic mass of the platinum will be 195.
Explanation:
We know that,
Atomic mass is the sum of the electrons and protons.
Platinum is the chemical element and it is the symbol is Pt. The atomic number of the platinum is 78 and the atomic mass is the 195,084 u.
According to the question,
Rounded to the nearest whole number
Hence, The atomic mass of the platinum will be 195.
If a iron cube weighs 7.9kg what is its density in g/cm3
Density is calculated as mass divided by volume. The density of an iron cube can be calculated if the volume is known. Typically, the density of iron is 7.9 g/cm3.
Explanation:This question involves a basic principle of physics called density, calculated as mass across volume. The density of iron, which we can denote by 'ρ', is typically around 7.9 g/cm3. In your question, you stated that the
iron cube
weighs 7.9kg. However, to find the density, we need to know the volume of the cube as well. Remember that you can convert kilograms to grams (1kg = 1000g) if needed.
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