Answer:
B.chlorine (Cl), iodine (I)
Which statement describes the reason for removing the insulation from the
ends of the wires used to make an electromagnet?
A. the ends of the wires become magnetic when the insulation is removed
B. The wires are easier to handle after insulation has been removed from them
C. The metal of the wires must be in contact with the terminals of a battery
D. the insulation on the wires causes the direction of an electric current to reverse
Answer:
The answer is different for other people so look out.The answer here is C. The metal of the wires must be in contact with the terminals of a battery.
Explanation:
I took the quiz.
The metal of the wire must be in contact with the terminals of a battery so that, electrons can easily pass through and generate the electrical current.
What is electrical insulation?An electrical insulation is used to prevent the passage of electricity through an object. The materials which does not conduct electrically at any condition is called insulators.
Insulators are used as protective envelopes over the conducting bodies to resist the electrical shock and shortage of electricity. The electrical wires of circuits are coated with insulating plastics throughout up to the terminals.
The terminals cannot be insulated because, the passage of electricity to external circuit can only be achieved by conducting ends otherwise insulation will resist the passage of electrons to the battery. Thus, option C is correct.
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What classifies spiders as Carnivores?
A. They have 6 legs
B. They eat plants
C. They eat meat
D. They get eaten by other organisms
Answer:
c. carnivore means to eat meat
Answer:
c. they eat meat
Explanation:
while the other options are true those don't classify spiders as carnivores
Nuclide A has a half-life of 4 days, and nuclide B has a half-life of 16 days. At the beginning of an experiment, a sample contains 2 nuclei of nuclide A and 218 nuclei equal of nuclide B. How long will it take before the numbers of nuclei of the two nuclides are equal?
Answer:
can't say...... . . please make me as brainlist
Answer: ladadadadadadasasasasassassaasss
Explanation:
i poop my pants
What is the relationship between atomic size and bond length for H2O / H2S and CO2 / CS2?
What di you think you would see happen in the bucket as ice comes into contact with high kinetic energy molecules?
Answer:The ice will melt
Explanation:
What do good electrical conductors and thermal conductors have in common?
Write a paragraph.
Answer:
A material that readily transmits energy is a conductor, while one that resist energy transfer is called an insulator. There are different types of conductors and insulators because there are different forms of energy. Materials that conduct electrons, protons, or ions are electrical conductors. They conduct electricity. Usually, electrical conductors have loosely bound electrons. Materials that conduct heat are thermal conductors. Substances that transfer sound are acoustical conductors. There are corresponding insulators for each type of conductor.
Explanation:
Electrical conductors and thermal conductors have loosely bound electrons. These are the materials that conduct heat.
Electrical conductors and thermal conductors:Electrical conductivity is a measure of how well electrical current can pass through a material under the influence of an applied electric field. Thermal conductivity measures how well heat can pass through a material under a temperature difference. Materials that are good conductors of heat and electricity. Thermal insulators do not transfer energy, but thermal conductors do.
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A biology experiment requires the preparation of a water bath at 37.08C (body temperature). The temperature of the cold tap water is 22.08C, and the temperature of the hot tap water is 55.08C. If a student starts with 90.0 g cold water, what mass of hot water must be added to reach 37.08C
Answer:
75 g
Explanation:
[tex]m_1[/tex] = Initial mass of water = 90 g
c = Specific heat of water
[tex]\Delta T_1[/tex] = Initial temperature difference = [tex](37.08-22.08)^{\circ}\text{C}[/tex]
[tex]m_1[/tex] = Mass of water to be added
[tex]\Delta T_2[/tex] = Final temperature difference = [tex](37.08-55.08)^{\circ}\text{C}[/tex]
Since, heat energy in the system is conserved we know
[tex]m_1c\Delta T_1+m_2c\Delta T_2=0\\\Rightarrow m_1c\Delta T_1=-m_2c\Delta T_2\\\Rightarrow m_2=-\dfrac{m_1\Delta T_1}{\Delta T_2}\\\Rightarrow m_2=-\dfrac{90(37.08-22.08)}{37.08-55.08}\\\Rightarrow m_2=75\ \text{g}[/tex]
The mass of water to be added to reach the desired temperature is 75 g.
Which statement about Fe is supported by the modern atomic theory but not John Dalton’s theory?
A. The element iron is composed of small particles called atoms.
B. The electrons of iron have probable locations in a region of space around the nucleus.
C. Iron atoms combine with other atoms in whole number ratios to form compounds.
D. Chemical reactions that involve iron do not create new atoms of iron.
Answer:
The correct option is B
Explanation:
One of the claims of John Dalton's atomic theory is that atom is the smallest unit of matter (which suggests that there are no particles smaller than an atom in any matter). This claim has been disproved by the modern atomic theory which established that there are particles smaller than atom (called subatomic particles). These particles are electrons, protons and neutrons.
One of the modern atomic theory was by Neils Bohr, who proposed that electrons move in circular orbits around the central nucleus. Thus, the electrons of iron can also be said to be present in a region of space (circular path) around the nucleus. This proves that option B is the correct option as John Dalton's theory did not even recognize the electron(s) nor the nucleus.
Answer:
b
Explanation:
the range of a visible wavelength is
Answer:
380 to 700 nanometers
Explanation:
The visible light spectrum is the segment of the electromagnetic spectrum that the human eye can view. More simply, this range of wavelengths is called visible light. Typically, the human eye can detect wavelengths from 380 to 700 nanometers.
Hope that answers your question.
For the chemical reaction 2 HBr(aq) + Ba(OH), (aq) — 2H20(1) + BaBr, (aq) write the net ionic equation, including the phases. net ionic equation:
Answer:
2hbr(aq) + ba(OH)2 (aq) --.> 2 H20 (l) + Babr2 (aq)
ionic equation is follows
2H^+(aq) + 2Br^- (aq) + Ba^2+(aq) + OH^-(aq) --->2H2O(l) + Ba^2+(aq) + 2Br-(aq)
cancel the spectator ions in equation above, that is Ba^2+ and 2Br^- ions
the net ionic equation is therefore=
2H^+(aq) + OH^-(aq)---> 2H2O (l)
Helppppppppppp ASAP
Answer:
c
Explanation:
its c bcs they are both the same
The lattice energy for ionic crystals increases as the charge on the ions _____________ and the size of the ions __________________.
a. increases, increases
b. increases, decreases
c. decreases, increases
d. decreases, decreases
e. none of these ,is generally correct
Answer:
b. increases, decreases
Explanation:
For an ionic compound ( ionic crystal), the lattice energy accounts for the crystal lattice's cohesion energy.
The lattice energy is the change in molar enthalpy associated with the reaction of the formation of gas ions from a mole of crystal.
This means that the lattice energy is needed to split the bond between particles of a solid ionic crystal and change the atoms into gaseous ions.
The smaller the atom size, the more heat energy required to split the bond, and the larger the atom size, the lesser heat required.
The charge on the atom also affects the behavior of ionic crystals. In essence, the higher the charge on the atom, the more difficult to split the bond, and the lesser the charge on an atom, the easier it is to split the bond.
Thus, we can conclude that the lattice energy for ionic crystals increases as the ions' charge increases, and the size of the ions decreases.
What is the electron configuration for an atom on Period #3 and in Group #17?
1s22s22p63523p64523d
1s22s22p?
1s22s22p 3s23p
1s22s22p
p64523d5
Answer:
the answer the question is 2,8,7
which issue is a limitation of using synthetic polymers
Answer: As trash, Synthetic Polymers are not biodegradable. Landfills can easily fill up with synthetic polymers. Plastics can be made into different products. Recycling synthetic polymers is costly.
Explanation: Hope this helps in any way possible!
The main issues of using synthetic polymers include toxicity poor biocompatibility etc. Synthetic polymers stay non-degradable for ling time and make the surface polluted.
What are synthetic polymers?Natural polymers are naturally made substances such as cellulose, starch, glycogen etc. Polymers made by man are called synthetic polymers. Synthetic polymers are diverse and are made through several polymerization techniques.
PVC, polyethylene, polyesters Teflon etc. are very common polymers in daily life. A major class of synthetic polymers include plastics which are major pollutants nowadays.
Most of the synthetic polymers are non-biodegradable and will cause landfill issues. Some them are toxic in nature and might cause several health issues. Blending them with biodegradable polymers is a solution for this.
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what will happen to the sugar when mixed to liquid?
Answer:
Heres the answer.
Explanation:
When you stir a spoonful of sugar into a glass of water, you are forming a solution. This type of liquid solution is composed of a solid solute, which is the sugar, and a liquid solvent, which is the water. As the sugar molecules spread evenly throughout the water, the sugar dissolves.
1. What process occurs along transform fault plate boundary?
Answer:
hope it helps...
Explanation:
Along the third type of plate boundary, two plates move laterally and pass each other along giant fractures in Earth's crust. Transform faults are so named because they are linked to other types of plate boundaries. The majority of transform faults link the offset segments of oceanic ridges.
Which number completes the balanced chemical equation showing the process of rusting?
4Fe + 3O2 ---> ____Fe2O3
A. 1
B. 2
C. 4
D. 12
Answer:
B. 2
Explanation:
HAPPYYYY TURKEY BREAK
Answer:
2
Explanation:
The pictures show a rock changing over time.
What process best describes what is happening to this rock?
weathering by acid rain
weathering by plant roots
weathering by water and ice
weathering by wind
Answer:
can you show the picture
. All waves have a similar
There are many ways of generating electrical energy. Research three of the following, describe how they work, and discuss the pros and cons of each of the three chosen electrical power plants:
thermal power plant (aka coal power plant)
nuclear power plant
solar power plant
hydroelectric power plant
geothermal power plant
tidal power plant
wind farms
Answer: Thermal Power Plant 1. A thermal power station is a power station in which heat energy is converted to electric power. In most, a steam-driven turbine converts heat to mechanical power as an intermediate to electrical power. Water is heated, turns into steam and drives a steam turbine which drives an electrical generator.
Nuclear Power Plant 2. A nuclear power plant is a thermal power station in which the heat source is a nuclear reactor. As is typical of thermal power stations, heat is used to generate steam that drives a steam turbine connected to a generator that produces electricity.
Solar Power Plant 3. Solar thermal power/electric generation systems collect and concentrate sunlight to produce the high temperature heat needed to generate electricity. ... Solar thermal power plants may also be hybrid systems that use other fuels (usually natural gas) to supplement energy from the sun during periods of low solar radiation.
Hydroelectric Power Plant 4. The most common type of hydroelectric power plant is an impoundment facility. An impoundment facility, typically a large hydropower system, uses a dam to store river water in a reservoir. Water released from the reservoir flows through a turbine, spinning it, which in turn activates a generator to produce electricity.
Geothermal Power Plant 5. At a geothermal power plant, wells are drilled 1 or 2 miles deep into the Earth to pump steam or hot water to the surface. ... When the water reaches the surface, the pressure is dropped, which causes the water to turn into steam. The steam spins a turbine, which is connected to a generator that produces electricity.
Tidal Power Plant 6. There are very few commercial-sized tidal power plants operating in the world. The first was located in La Rance, France. The largest facility is the Sihwa Lake Tidal Power Station in South Korea. The United States has no tidal plants and only a few sites where tidal energy could be produced at a reasonable price.
Wind Farm 7. Wind turbines work on a simple principle: instead of using electricity to make wind—like a fan—wind turbines use wind to make electricity. Wind turns the propeller-like blades of a turbine around a rotor, which spins a generator, which creates electricity.
Explanation:
To solve this we must be knowing each and every concept related to thermal power plant. Therefore, in the below given ways, three ways of producing electricity is discussed.
What is thermal power plant?A power plant that converts heat energy into electric power is known as a thermal power station. Most often, a steam-driven turbine turns heat into mechanical power as a step toward creating electricity.
Systems for generating electricity using solar thermal energy collect and start concentrating sunlight to create the high-temperature heat required to produce electricity.
An impoundment facility is the kind of hydroelectric plant that is most prevalent. A dam is used in an impoundment facility, which is usually a big hydroelectric system, to hold stream water in a reservoir.
Therefore, in the above given ways, three ways of producing electricity is discussed.
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How do valence electrons influence electrical conductivity?
Answer:
The conductivity of the atom depends on the number of electrons that are in the valence shell. When an atom has only one electron in valence shell, it is almost a perfect conductor. When an atom has eight valence electrons the valence shell is said to be complete and the atom is an insulator.
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Choose the formula for hydroxide.
OH
HPO4
Ca(OH)2
d Ba(OH)2
Answer:
OH
Explanation:
Hydroxide is a diatomic anion with chemical formula OH⁻.
Polymerization is most directly responsible in determining which structure of a protein?
A. quaternary
B. secondary
C. tertiary
D. primary
Answer:
primary
Explanation:
polymerization joins amino acids, often creating a primary structure
Anyone know how to do this please!! ? I will mark brainlist
Objects that conduct electricity can easily carry an electrical charge. Which of the following materials best conducts electricity?
A. copper wire
B. plastic tubing
C. rubber sheets
D. cotton string
Answer:
copper wire!
Explanation:
Each copper atom has lost one electron and become a positive ion. ... The electrons can move freely through the metal. For this reason, they are known as free electrons. They are also known as conduction electrons, because they help copper to be a good conductor of heat and electricity. Copper, Silver, Aluminum, Gold, Steel and Brass are common conductors of electricity. When properly installed, it is the safest and most efficient metal to produce electricity. Copper is commonly used as an effective conductor in household appliances and in electrical equipment in general. Because of its low cost, most wires are copper-plated. For a material to be a good conductor, the electricity passed through it must be able to move the electrons; the more free electrons in a metal, the greater its conductivity.
Number the elements sodium, magnesium, phosphorus, and chlorine in the predicted order ionization energies from the highest to the smallest. sodium magnesium phosphorus chlorine
Answer:
It goes 4 3 2 1
Explanation:
Alphabetical order
Answer:
4- sodium, 3-magnesium, 2-phosphorus, 1-chlorine
Explanation:
edge!
Draw structures of the major organic products:
Answer:
b only
Explanation:
Which statement is a scientific law?
Scientists use genes to explain why evolution happens.
Genes are long patterns that are similar to computer codes.
A person’s traits are controlled by different forms of a gene.
The discovery of genes changed how scientists think about life.
**PLEASE heLP i NEED THESE ANSWERSSSSSSSS*
How do you think the size of an atom will affect its ability to attract additional electrons?
Which of these is most likely observed during winter weather?
Cumulonimbus clouds
Explosive sounds
Freezing rain
Water spouts
Please Help!
Answer:
FREEZING RAIN
Explanation:
Answer:
C. freezing rain hope it helps :)
Explanation: