in teh vector class the function begin() refers to one position before the first lemenet in the vectorT/F
Answers
False.
The begin() function returns an iterator pointing to the first element in the vector. This means that it is the starting position for iterating over the elements of the vector using a loop or other method.
It is important to note that the begin() function returns a valid iterator even if the vector is empty.
In this case, the iterator will point to one position past the end of the vector (i.e., end()), which is not a valid element of the vector.
In summary, begin() returns an iterator to the first element in the vector, not one position before it.
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Related Questions
Can be used to eliminate rubbing friction of wheel touching frame. 1.Traction 2.Thrust washer
Answers
Answer:
thrust washer
can be used to eliminate rubbing friction of wheel touching frame
main circuit wiring is represented in a schematic by
A.the abbreviation mcw
B. A red line
C. A darker line
D.thicker line
Answers
Answer: a thicker line
Explanation:
tacit knowledge is formal, systematic knowledge that can be written down and passed on to others.
true or false?
Answers
False. Tacit knowledge is informal, systematic knowledge that cannot be written down and passed on to others. It is personal, intuitive, and based on experience. It involves skills, beliefs, and values that are not easily communicated through language or symbols.
Examples of tacit knowledge include how to ride a bicycle, how to cook a meal, and how to play a musical instrument. Tacit knowledge is often contrasted with explicit knowledge, which is formal, systematic knowledge that can be written down and shared with others. Explicit knowledge includes facts, procedures, rules, and theories that are expressed in language or symbols and can be stored in books, databases, or other forms of media. Examples of explicit knowledge include mathematics, science, history, and literature. Both types of knowledge are important for learning, problem solving, and innovation, but they require different methods of acquisition, transfer, and application.
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How does a cast such as (BankAccount) x differ from a cast of number values such as (int) x?
Which of these conditions returns true? Check the Java documentation for the inheritance patterns. Recall that System.out is an object of the PrintStream class.
a. System.out instanceof PrintStream b. System.out instanceof OutputStream c. System.out instanceof LogStream d. System.out instanceof Object e. System.out instanceof Closeable f. System.out instanceof Writer
Suppose C is a class that implements the interfaces I and J. Which of the following assignments require a cast?
C c = . . .; I i = . . .; J j = . . .;
a. c = i; b. j = c; c. i = j;
Answers
1) The difference between these two types of casts is that the first one is used for object references while the second one is used for primitive types.
2) In the case of the conditions, the ones that return true are:
a. System.out instanceof PrintStream
b. System.out instanceof OutputStream
d. System.out instanceof Object
e. System.out instanceof Closeable
3) As for the assignments that require a cast, the ones that do are:
a. c = i;
c. i = j;
This is because C is a class that implements the interfaces I and J, so it can be assigned to an object of type I or J without a cast. However, an object of type I or J cannot be assigned to an object of type C without a cast, because they are not subclasses of C. Similarly, an object of type I cannot be assigned to an object of type J without a cast, and vice versa, because they are not subclasses of each other.
A cast such as (BankAccount) x is used to convert an object reference to a specific type, while a cast of number values such as (int) x is used to convert a number from one type to another.
System.out is an object of the PrintStream class, which is a subclass of OutputStream, Object, and Closeable.
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Let's break it down into parts.
1. The difference between (BankAccount) x and (int) x casts:
When you cast an object like (BankAccount) x, you are converting the reference type of the object "x" to the BankAccount type. This is usually done when "x" is already an instance of the BankAccount class or a subclass of it. However, when you cast a number value like (int) x, you are converting a primitive data type (such as float or double) to an integer. This involves truncating the decimal part of the number, if any.
2. Which of these conditions returns true?
a. System.out instanceof PrintStream - True
b. System.out instanceof OutputStream - True
c. System.out instanceof LogStream - False (LogStream is not a standard Java class)
d. System.out instanceof Object - True
e. System.out instanceof Closeable - True
f. System.out instanceof Writer - False (System.out is not an instance of the Writer class)
3. Suppose C is a class that implements the interfaces I and J. Which of the following assignments require a cast?
C c = . . .; I i = . . .; J j = . . .;
a. c = i; - Requires a cast: c = (C) i;
b. j = c; - No cast required
c. i = j; - Requires a cast: i = (I) j;
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Hey guys can anyone list chemical engineering advancement that has been discovered within the past 20 years
Answers
Nanopesticides. The world population keeps growing. ...
Enantio selective organocatalysis. ...
Solid-state batteries. ...
Flow Chemistry. ...
Porous material for Water Harvesting. ...
Directed evolution of selective enzymes. ...
From plastics to monomers. ...
Distinguish between systems analysis and systems design?
Answers
Answer:
System analysis can be defined as a deep analysis of a part of the structure of a module that has been designed before. System design means to make any module or a part of the structure from scratch and build it completely without estimation.
Explanation:
Describe some typical pairs of entities that you think might be common in business, and describe their relationships, whether many-to-many, one-to-many, many-to-one, or one-to-one. Explain why you think that a particular relationship applies to that pair of entities.
Answers
Answer:
Sole Proprietorship, General Partnership , Limited Partnership, corporation
Explanation:
Business in something that an individual or a group of people do for a living and produce products and services that benefits the society and the people. There are several entities that can be common in business. Some common form of entities are :
Sole Proprietorship : One to one
-- here there is only one owner in the business and he maintains and manages the entire business functions under his control.
Limited Partnership : many to one
-- here two or more than two partners establish business and runs it but only one or more is liable to the amount of the investments.
General Partnership : many to many
-- It is a business partnership where all the partners shares the profits, the assets, legal liabilities and financial liabilities, etc.
Corporation : many to one
It is a business entity where a group of individual or a group of companies run a single business which is generally authorized by the state.
Some of the typical types of the entities that one may think to be common in term of the business entities are about the relationships that are held within many to many and one to many.
The one to one relation is Sole Proprietorship, General Partnership, Limited Partnership, corporation.Learn more about the typical pairs of entities.
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These questions are to cover some of the most essential capabilities you will need in the real life. Answer all the questions using Mathematica. Need the coding
(i) Write a function called testQ which returns True if its argument is 0, 100 or an even integer between 0 and 100 and False otherwise. (ii) Write a function called selector which takes: real numbers and returns A; even integers between 0 and 100 and returns B; symmetric lists (one whose reverse is equal to itself) and returns C; and returns D in all other cases. (iii) Test your function thoroughly.
Answers
All the functions are shown below.
Now, Here is the code for the first function:
def testQ(num):
if num == 0 or num == 100:
return True
elif num % 2 == 0 and 0 < num < 100:
return True
else:
return False
And, the code for the selector function is,
def selector(input):
if type(input) == int:
if input % 2 == 0 and 0 <= input <= 100:
return 'B'
else:
return 'D'
elif type(input) == list:
if input == input[::-1]:
return 'C'
else:
return 'D'
elif type(input) == float:
return 'A'
else:
return 'D'
For test the functions, you can call them with different inputs and check if they return the expected output.
Here are some test cases:
# Test cases for testQ function
print(testQ(0)) # True
print(testQ(100)) # True
print(testQ(50)) # True
print(testQ(75)) # False
print(testQ(-2)) # False
print(testQ(101)) # False
Test cases for selector function
print(selector(3.14159)) # A
print(selector([1, 2, 3, 2, 1])) # C
print(selector([1, 2, 3])) # D
print(selector(50)) # B
print(selector(51)) # D
print(selector('hello')) # D
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Employees cannot be held legally responsible for an environmental violation.
Answers
Answer:
It does not take into consideration what the responsible party knew about the law or regulation they violated. Environmental criminal liability is triggered through some level of intent.
In regards to whether an employee can be held legally liable for environmental violations, this statement is False.
Environmental ViolationsThese are offences against existing environmental laws. Apply to those who commit it and those who willfully ignored the crime.This means that if an employee notices that a company is responsible for environmental violations, and does nothing about it, they could be held legally responsible for the violation as well.
In conclusion, this is true.
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One of the requirements for tennis balls to be used in official competition is that, when dropped onto a rigid surface from a height of 120 in., the height of the first bounce of the ball must be in the range 55 in. <= h <= 60 in. Determine the range of the coefficients of restitution of the tennis balls satisfying this requirement. Any ideas on this?
Answers
Answer:
At temperature is and relative humidity is 86% therefore, the humidity ratio is 0.0223 and the specific volume is 14.289
At temperature is and Relative humidity is 40% therefore, the humidity ratio is 0.0066 and the specific volume is 13.535.
To calculate the mass of air can be calculated as follows:
Now , we going to calculate the volume,
The time which is required to fill the cistern can be calculated as follows:
Now, putting the value in above formula we get,
Therefore, the hours required to fill the cistern is 4.65 hours.
Explanation:
It is desired to enrich the partial pressure of hydrogen in a hydrogen–nitrogen gas mixture for which the partial pressures of both gases are 0.1013 MPa (1 atm). It has been proposed to accomplish this by passing both gases through a thin sheet of some metal at an elevated temperature; in as much as hydrogen diffuses through the plate at a higher rate than does nitrogen, the partial pressure of hydrogen will be higher on the exit side of the sheet. The design calls for partial pressures of 0.051 MPa (0.5 atm) and 0.01013 MPa (0.1 atm), respectively, for hydrogen and nitrogen. The concentrations of hydrogen and nitrogen (CHC
H and CNC N , in mol/m3mol/m
3 ) in this metal are functions of gas partial pressures (pH2 and pN2p
H 2 and p N , in MPa) and absolute temperature and are given by the following expressions:
CH=2.5×103√pH2exp(−27,800J/mol/RT)
CN=2.75×103√pN2exp(−37,600J/mol/RT )
Furthermore, the diffusion coefficients for the diffusion of these gases in this metal are functions of the absolute temperature, as follows:
DH(m2/s)=1.4×10−7exp(−13,400J/mol/RT)
DN(m2/s)=3.0×10−7exp(−76,150J/mol/RT)
Is it possible to purify hydrogen gas in this manner? If so, specify a temperature at which the process may be carried out, and also the thickness of metal sheet that would be required. If this procedure is not possible, then state the reason(s) why.
Answers
Answer:
T = 3460 K
Explanation:
See attachment for calculation.
Since the temperature we have is above the melting point of the metal, then we can conclude that it is too high for the diffusion process to be possible.
A viscous liquid is sheared between two parallel disks; the upper disk rotates and the lower one is fixed. The velocity field between the disks is given by V=e^θrωz/h (The origin of coordinates is located at the center of the lower disk; the upper disk is located at z = h.) What are the dimensions of this velocity field? Does this velocity field satisfy appropriate physical boundary conditions? What are they?
Answers
Answer:
For lower disk : V = e^θrω(0)/h = 0
At the upper disk: V = e^θrω(h)/h = e^θrω
Hence The physical boundary conditions are satisfied
Explanation:
Velocity field ( V ) = e^θrωz/h
Upper disk located at z = h
Determine the dimensions of the velocity field
velocity field is two-dimensional ; V = V( r , z )
applying the no-slip condition
condition : The no-slip condition must be satisfied
For lower disk Vo = 0 when disk is at rest z = 0
∴ V = e^θrω(0)/h = 0
At the upper disk V = e^θrω given that a upper disk it rotates at z = h
∴ V = e^θrω(h)/h = e^θrω
Hence we can conclude that the velocity field satisfies the appropriate physical boundary conditions.
a major system repair is being performed on an r22 appliance
Answers
If a major system repair is being performed on an R-22 appliance, one cannot "top off the unit with R-410A".
What is R-22 refrigerant?R-22 refrigerant is a hydrochlorofluorocarbon (HCFC) refrigerant that has been in use since the 1950s in residential and commercial air conditioning systems. R-22 refrigerant is also known as HCFC-22. It is an ozone-depleting substance and has been phased out in many countries due to its harmful effects on the environment. R-22 refrigerant is still widely used in older air conditioning systems, but it is becoming increasingly difficult to obtain as it is being phased out.
What is R-410A refrigerant?R-410A refrigerant is a hydrofluorocarbon (HFC) refrigerant that has been developed as a replacement for R-22 refrigerant. It is a more environmentally friendly refrigerant and does not harm the ozone layer. R-410A refrigerant is also known as HFC-410A. It is commonly used in newer air conditioning systems as a replacement for R-22 refrigerant. It is important to note that R-410A refrigerant cannot be used in air conditioning systems that are designed to use R-22 refrigerant.
The complete question:
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A JFrame is a descendant of each of the following classes except the ___________ class. a. Component b. Jar
c. Container
d. Window
Answers
A JFrame is a descendant of each of the following classes except the Jar class.
It is a descendant of Component, Container, and Window classes.
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why do u have to have certain limits for questions
Answers
Answer:
ok
Explanation:
20. A spur gear pinion and gear shown on a drawing have a diametral pitch of 12. The pitch radius of the pinion is 1.500 inches and the gear ratio is
specified to be 1:3. On the print, you would expect the pitch diameter of the gear to be
OA. 9.00 inches.
Answers
On the print you would expect the pitch diameter of the gear to be 9.00 inches. Option A is right.
How to solve for the diameterGear ratio = 1/3
This is solved as number of teeth on pinion / teeth on gear
= Np/Ng
The pitch diameter = 1.5 x 2
= 3
Diametral pitch = 12
NP = 3 x 12 = 36
This is the teeth on piston
Ng = 3NP
Ng = 3 * 36
= 108
Hence pitch diameter = 108/12 = 9
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A traditional children's riddle concerns a farmer who is traveling with a sack of rye, a goose, and a mischievous dog. The farmer comes to a river that he must cross from east to west. A boat is available, but it only has room for the farmer and one of his possessions. If the farmer is not present, the goose will eat the rye or the dog will eat the goose. We wish to design a circuit to emulate the conditions of this riddle. A separate switch is provided for the farmer, the rye, the goose and the dog. Each switch has two states, depending on whether the corresponding object is on the east bank or the west bank of the river. The rules of play stipulate that no more than two switches be moved at a time and that the farmer must move (to row the boat) each time switch are moved. The switch for the farmer provides logic signal F, which is high if the farmer is on the east bank and low if he is on the west bank. Similar logic signals (G for the goose, D for the dog and R for the rye) are high if the coilresponding object is in the east bank and low if it is on the west bank. The logic signal A (Alarm), which is the output, is high any time the rye or the goose are in danger of being eaten. [15] i) Prepare the truth table listing all combinations of the input signals F, G, D and R. Also show the desired value of the output, A, for each row in the truth table. Hence determine the SOP and POS expressions from your table. ii)
Answers
i) Truth table listing all combinations of the input signals F, G, D and R:Given: Switch for the farmer provides logic signal F, which is high if the farmer is on the east bank and low if he is on the west bank. Similar logic signals (G for the goose, D for the dog, and R for the rye) are high if the corresponding object is in the east bank and low if it is on the west bank.
The logic signal A (Alarm), which is the output, is high any time the rye or the goose is in danger of being eaten.F G D R A0 0 0 0 00 0 0 1 10 0 1 0 10 1 0 0 10 1 1 0 10 1 1 1 1Now, the desired value of the output, A, for each row in the truth table is shown below: 0000 0001 0010 0100 1000 1111ii) SOP (Sum of Products) and POS (Product of Sums) expressions from the truth table:The sum of products (SOP) is A = F' G' D' R + F' G' D R' + F G' D' R' + F G' D R' + F G D' R'The product of sums (POS) is A = (F + G + D' + R')(F + G' + D + R')(F' + G + D + R')(F + G' + D' + R')(F + G + D' + R')Therefore, the SOP expression from the truth table is A = F' G' D' R + F' G' D R' + F G' D' R' + F G' D R' + F G D' R' and the POS expression from the truth table is A = (F + G + D' + R')(F + G' + D + R')(F' + G + D + R')(F + G' + D' + R')(F + G + D' + R').Explanation:This problem is related to the logic circuit that should be designed to replicate the conditions of a riddle that involves a farmer who has a sack of rye, a goose, and a mischievous dog. When the farmer comes across a river, he must cross it from east to west. A boat is available, but it only has space for the farmer and one of his possessions. If the farmer is not present, the goose will eat the rye or the dog will eat the goose. A circuit is required to replicate this riddle's conditions, with four switches provided for the farmer, the rye, the goose, and the dog.
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The Penstock output of Grand Coulee dam is about 750MW when the effective water head is 871 m. Compute the water flow rate inside the penstock.
Answers
To compute the water flow rate inside the penstock of the Grand Coulee dam, given an output of 750 MW and an effective water head of 871 m, we can use the equation: Flow Rate = Power / (Density * Gravity * Head).
The water flow rate inside the penstock can be calculated using the power output, effective water head, and known physical constants. The equation used is Flow Rate = Power / (Density * Gravity * Head), where Power is the output power in watts, Density is the density of water in kg/m³, Gravity is the acceleration due to gravity in m/s², and Head is the effective water head in meters.
Given that the output power is 750 MW, we need to convert it to watts (1 MW = 1,000,000 watts). The effective water head is given as 871 m. The density of water is approximately 1000 kg/m³, and the acceleration due to gravity is approximately 9.81 m/s².
Substituting the values into the equation, we have Flow Rate = 750,000,000 / (1000 * 9.81 * 871). By calculating this expression, we can determine the water flow rate inside the penstock of the Grand Coulee Dam.
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why you so mean to me? leave my questions please. answer them
Answers
Answer: Why is even here then.
Explanation:
For the circuit in Figure 4, find the Thevenin Equivalent Circuit (TEC) across \( R_{L} \) terminals: (a) Calculate the open-circuit voltage. (b) Calculate \( R_{T H} \). (c) What value of \( R_{L} \)
Answers
The Thevenin Equivalent Circuit (TEC) across RL terminals is shown in the below diagram. \(Fig \ 1\) \(\ \ \ \ \) Calculation of open-circuit voltage:
The output voltage of the circuit, open-circuited at terminals RL will be the Thevenin's open-circuit voltage. \(V_{Th}\) is the voltage across terminals A and B when there is an open circuit. Open-circuited terminals have no load attached to it. Hence the current passing through it is 0.
Thevenin’s Theorem allows us to simplify circuits consisting of multiple voltage sources and resistors into a single voltage source and a single resistance. We can calculate the Thevenin's equivalent resistance as follows. Removing the source voltage \({{V}_{S}}\) and load resistor \({{R}_{L}}\), we get the following circuit.
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What phase best describes the function of a thermostat?
Answers
Answer:
a formula containing arguments
Explanation:
Hopefully that's correct
The minimum safe working distance from exposed electrical conductorsa. is unlimitedb is at least 2 feetс. depends on the amount of voltaged. only a few inchese. depends on the type of PPE you are wearing
Answers
Voltage determines the bare minimum distance from an exposed electrical conductor that is safe.
An electrical conductor is what?Electrical charge carriers, frequently electrons or ions, move effortlessly from atom to atom in a conductor when voltage is applied. Because they have free electrons, conductors easily conduct electrical current. Insulators are poor conductors because they resist electrical current.
What exactly are conductor and insulator?By moving through materials, electrons produce electricity. Copper wires and other materials that permit electron flow are referred to as conductors, whereas rubber and other materials that prevent electron flow are referred to as insulators.
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During normal operation, refrigerant pumped into a condenser is in the form of ____.
Answers
During normal operation, refrigerant pumped into a condenser is in the form of a gas.
What is refrigeration?The process of maintaining the temperature of the desired space lower than that of the surroundings is called refrigeration. In the process of refrigeration, the chemical used is called refrigerant.
In the cycle of refrigeration, the liquid form of the refrigerant took heat from the desired space in the evaporator and is taken by the compressor where it is compressed at a high temperature and pressure greater than that of an atmosphere.
The refrigerant now is pumped to the condenser in the form of high-pressure and high-temperature gas. Here it loses its heat to the atmosphere and condenses in the form of liquid.
Therefore, during normal operation, refrigerant pumped into a condenser is in the form of a gas.
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tech a says that a cat iii meter is required when working on the ev or hev high-voltage system. tech b says that a hev can start the ice on its own if the ""ready"" indicator is on. who is correct?
Answers
Tech A says that a CAT III meter is required when working on the EV or HEV high-voltage system. Tech B says that a HEV can start the ICE on its own if the "Ready" indicator is on. Both are correct.
There's a lot of confusion out there about the requirements for working on high-voltage systems in hybrid and electric vehicles. Tech A says that a CAT III meter is required, while Tech B says that a HEV can start the ICE on its own if the "Ready" indicator is on. So who's right?
Both techs are actually correct. A CAT III meter is required when working on the EV or HEV high-voltage system. However, a HEV can start the ICE on its own if the "Ready" indicator is on.
The bottom line is that you need to be very careful when working on high-voltage systems. Make sure you have the proper equipment and training before attempting any repairs.
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If I want to be able to send a message from an instance of class A to an instance of class B
a. I must have a link stored in the instance of class A, pointing to the instance of class B.
b. I must have a link stored in the instance of class B, pointing to the instance of class A.
c. I must obtain a reference to the instance of class B but it doesn’t need to be stored as a link attribute in the object instance of either class.
d. I can just send the message. It will find its way to the receiver object.
Answers
The message from an instance of class A to an instance of class B is a. I must have a link stored in the instance of class A, pointing to the instance of class B and b. I must have a link stored in the instance of class B, pointing to the instance of class A.
This link allows the objects to communicate with each other and exchange information through messages. Option c is also possible, but you would need to obtain a reference to the instance of class B in some other way, such as through a method call or parameter passing.
Option d is not correct because messages need to be sent to a specific receiver object, and the link between the two classes is necessary for the message to reach its intended destination.
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A reservoir rock system located between a depth of 2153m and a depth of
2383m , as the pressure at these depths is 18.200 MPa , 19.643 MPa
respectively the thickness of oil zone 103m, if the density of water is 1060 kg/m3
Determine the oil and gas density. what is the pressure at the depth of 2200m ?
what is the depth at which the pressure is 1900 MPa? Determine the gas-oil and
oil- water contact depth.
Answers
calculate force and moment reactions at bolted base O of overhead traffic signal assembly. each traffic signal has a mass 36kg, while the masses of member OC and AC are 50Kg and 55kg, respectively. The mass center of mmber AC at G.
Answers
Answer:
The free body diagram of the system is, 558 368 368 508 O ?? O, Consider the equilibrium of horizontal forces. F
Explanation:
I hope this helps you but I think and hope this is the right answer sorry if it’s wrong.
The thermal resistance of a medium represents the resistance of that medium against heat transfer True or False
Answers
The given statement "The thermal resistance of a medium represents the resistance of that medium against heat transfer" is true. Further explanation is given below:
Thermal resistance, denoted as R, is a measure of the capacity of an element or a component to prevent heat flow. It is the difference between the temperature gradient across an object and the rate of heat energy transmission per unit area via that object. Thermal resistance, like electrical resistance, determines the efficiency of thermal energy transmission across a material.
The larger the thermal resistance, the more difficult it is to transfer heat through the material. As a result, the heat generated by a device's internal workings cannot be removed efficiently, causing it to overheat and ultimately fail. The SI unit of thermal resistance is the kelvin per watt, as in the case of electrical resistance. It is denoted by K/W. When selecting an insulating material, the thermal resistance of the material is critical.
A good insulator, such as air, has a high R-value, while a bad insulator, such as metal, has a low R-value. This is because metals are good heat conductors and so they have a low thermal resistance. Thus, it can be concluded that the given statement is true.
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1. Current in a series circuit is:
OA. Greatest at the point of highest resistance
OB. Least at the point of highest resistance
OC. The same throughout
OD. Equal to the Voltage minus the Resistance
Answers
Answer:
C. The same throughout
Explanation:
There is only one current path in a series circuit. The current is the same everywhere on that path.
A student is investigating the particles in a glass window, raindrops on the window, and the air around the window. Assume the window, the raindrops, and the air are all at 25 °C.
Answers
Matter can be defined as anything (physical object or body) that has mass and takes up space. Thus, the mass of a physical object measures the amount of matter the object contains.
The states of matter.In Science, water is an example of matter and it exists in three (3) main states or phases such as the following:
SolidLiquidGasBased on scientific records and information, we know that all particles have various degrees of attraction to one another and this can be described as follows:
The glass is a solid and as such the attraction between its particles is strong enough to make them locked in one place. The raindrop is a liquid and as such the attraction between its particles is strong enough to hold them together, but not strong enough to prevent the particles from sliding past each other. The air is a gas and as such there is very little (minimal) attraction between its particles, thereby, making them to move freely.Read more on matter here: https://brainly.com/question/24783543
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Complete Question:
A student is investigating the particles in a glass window, raindrops on the window, and the air around the window. Assume the window, raindrops, and the air are all at 25 degrees Celsius. Identify the particle structure in each sample of matter.