Answer:
People have come up with all sorts of inventive ways of measuring length. The most intuitive are right at our fingertips. That is, they are based upon the human body: the foot, the hand, the fingers or the length of an arm or a stride.
In ancient Mesopotamia and Egypt, one of the first standard measures of length used was the cubit. In Egypt, the royal cubit, which was used to build the most important structures, was based on the length of the pharaoh’s arm from elbow to the end of the middle finger plus the span of his hand. Because of its great importance, the royal cubit was standardized using rods made from granite. These granite cubits were further subdivided into shorter lengths reminiscent of centimeters and millimeters.
piece of black rock with white Egyptian markings
Fragment of a Cubit Measuring Rod
Credit: Gift of Dr. and Mrs. Thomas H. Foulds, 1925
Later length measurements used by the Romans (who had taken them from the Greeks, who had taken them from the Babylonians and Egyptians) and passed on into Europe generally were based on the length of the human foot or walking and multiples and subdivisions of that. For example, the pace—one left step plus one right step—is approximately a meter or yard. (On the other hand, the yard did not derive from a pace but from, among other things, the length of King Henry I of England’s outstretched arm.) Mille passus in Latin, or 1,000 paces, is where the English word “mile” comes from.
And thus, the meter has and likely will remain so elegantly defined in these terms for the foreseeable future.
Explanation:
is this short enough
How long do graduate degrees typically take (per degree)?
1-2 years
3-6 years
5-7 years
7-10 years
The time taken typically for completing gradate degree is 3-6 years.
What is a graduate degree?
The graduate degree is the advanced level of academics after 12th standard. It depots advanced academic degree that is beneficial for students to brush-up their learnings of under graduation.
The time taken may vary degree to degree but it limits from 3 years until 6 years.
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As you push a toggle bolt into a wall, the
toggle collapses through the wall then does
which of the following?
How do you calculate the integral vector field F(x,y) = (-2y-4πy²sin(πx) + (4xsen(πy)) I+ (-2x+8ycos(πx) +2πx²cos (πy)) j along the parameterized c curve r(t) = ((t-1) ^10, sin(π/t) with 1
Answer:
first one is (a) next one is (b)
Explanation:
elements of parallel computing
[tex]\huge{\orange}\fcolorbox{purple}{cyan}{\bf{\underline{\green{\color{pink}Answer}}}} [/tex]
Elements of parallel computing:Computer systems organization. Computing methodologies. General and reference. Networks. Software and its engineering.Theory of computation.how does error detection take place
Answer: To detect and correct errors, additional bits are added to the data bits at the time of transmission. The additional bits are called parity bits. They allow detection or correction of errors. The data bits along with the parity bits form a code word.
Explanation:
An overload is the same as a short or ground fault
Safety nets must absorb the force of a 400 this is referred to as.
A cat is fed a diet designed for dogs. Which amino acid is most likely to be deficient in this cat's diet?
Answer:
Your cat may also be a risk of a taurine deficiency if he or she enjoys sampling your dog's food. Dog food doesn't contain taurine, as dogs can create their own supply of the amino acid. Although your cat may like the taste, a steady diet of dog food is a bad idea
hope this helps
Optimum engine oil pressure at operating temperature and moderate engine load should be __________ ps
Answer:
What Is Normal Oil Pressure Temperature? Oil temperatures typically range from 200 degrees to 200 degrees Fahrenheit, depending on the weather. The oil pressure ranges from 100psi to 10-15psi depending on the weather at start up.
Explanation:
contrast moral and immoral creativity and innovation
Moral creativity and innovation are based on original discoveries, whereas immoral innovation is based on unscrupulous actions.
What is innovation?Innovation refers to the practices aimed at developing new products and services for the well-being of society.
Moral innovation is an expression generally used to describe technological advancements based on intellectual property rights.
In conclusion, moral creativity and innovation are based on original discoveries, whereas immoral innovation is based on unscrupulous actions.
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I need a description of a train station. Urgent. Thanks a lot
Answer:
The entire place was dark and cold as the train whooshed by. This place was nothing like Platform 9 and 3/4. The rain was loud on the roof of the station, but you could still hear the faint noises of a violin. "20 pence for requests" read a sign from a man who's just trying to get by.
Explanation:
hope this helps:)
Write a code about Sum of Natural Numbers using loop in c++
Answer:
Sum of Natural Numbers using loop #include <iostream> using namespace std; int main() { int n, sum = 0; cout << "Enter a positive integer: "; cin >> n; for (int i = 1; i <= n; ++i) { sum += i; } cout << "Sum = " << sum; return 0; } Output. Enter a positive integer: 50 Sum = 1275
Explanation:
Nisha has been a journalist all her life, mostly covering space missions and news, but has recently had twins and is looking for a career change. For this season of life, she’s more interested in working with other people’s writings and getting them in front of readers. Which career path might be a good fit for Nisha right now?
data science
space law
software engineering
space publishing
Discuss the microstrucral transformation of eutectic reaction, hypo-eutecticand hyper eutectic. Including temperature, reactions and microstrucral development/phases(draw diagrams)
Answer:
how will i draw diagram
Explanation:
Answer:
At eutectic there are 3phases present.
Explanation:
Engine measurement is being discussed. technician a says the bore is the distance the piston moves within the cylinder. technician b says the stroke is the diameter of the cylinder. who is correct?
Answer:
Bore is the diameter of the cylinder.
Explanation:
Stroke is the distance the piston moves up and down in the cylinder.
i wouldn't listen to technician A anymore.
Is reinforcement needed in a retaining wall
Consider the function f(n) = n
2 + 1000n, and do the following:
a) Prove that f(n) = O(n
3
) by finding a c0 and n0 such that f(n) ≤ c0 · n
3
for n > n0.
b) Prove that f(n) = O(n
2
) by finding a c1 and n1 such that f(n) ≤ c1 · n
2
for n > n1.
c) Prove that f(n) = Ω(n
2
) by finding a c2 and n2 such that f(n) ≥ c2 · n
2
for n > n2.
d) Prove that f(n) = Θ(n
2
) by finding a c3, c
′
3
, and n3 such that c3 · n
2 ≤ f(n) ≤ c
′
3
· n
2
for n > n3
get off this
Explanation:
The __________ is normally inspected when high-side pressures are too high and the system is not cooling well.
The condenser is normally inspected when the high-side pressures are too high in a refrigerator etc.
What is a Condenser?This is defined as a device which reduces a gas or vapour to a liquid and is normally inspected when the high-side pressures are too high.
When this occurs , it therefore means the system is not cooling well which could damage other parts.
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If you are exposed to potentially infectious material via a sharps injury, what should you do immediately?
select the best option.
get the blood tested before washing it away.
report the injury.
wash the area with soap and water.
blot the area with a dry tissue.
Answer:
Soap and water
Explanation:
then report the injury....
In addition to science courses like physics and chemistry, what other types of courses are becoming increasingly relevant to space science careers?
history
computer science
religious studies
civil engineering
Computer science and Civil engineering
What is Space science?
Space science is the study of the area beyond the earth’s atmosphere. Computer science cuts across most disciplines as computers is useful almost all areas. Civil engineering is a broad engineering discipline studying necessities of continuous human existence. The study is not directly involved to space science but gives fundamental knowledge that will be useful to space scientists The knowledge of civil engineering will help in determining the possibility of human survival in space
A small county board is composed of three commissioners. Each commissioner votes on measures presented to the board by pressing a button indicating whether the commissioner votes for or against a measure. If two or more commissioners vote for a measure, it passes. Design a logic circuit that takes the three votes as inputs and lights either a green or a red light to indicate whether a measure passed.
The common sense circuit. noun. a digital circuit utilized in computer systems to carry out a logical operation on its or extra enter signals. There are six simple circuits, the AND, NOT, NAND, OR, NOR, and unique OR circuits, which may be blended into extra complicated circuits.
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What is the minimum level of isolation required on T2 such that T2 never sees a value of zero in its output
Answer:
The speed is minimum at t = 4 seconds.
The position function of a particle is given by
The velocity is given as,
Speed is computed as,
Differentiate above expression and equate to zero.
Thus, speed is minimum at t = 4 seconds.
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Explanation:
a 230v shunt motor delivers 30hp at the shaft at 1120rpm. if the motor has an efficiency of 87% at this load, determine: the total input power the line current
Shunt motors are direct current motors that have parallel windings with identical voltage. The total input power of the shunt motor is 25.724 kW and the line current will be 111.843 A.
What are input power and line current?Total input power is the ratio of the output power and the efficiency, while the line current is the proportion of input power to an input voltage.
The total input power (total IP) is calculated as:
Given,
Output power (OP) = 30 hp
Efficiency = 0.87
Substituting values:
[tex]\begin{aligned}\text{Total IP} &= \rm \dfrac {OP}{efficiency}\\\\&= \dfrac {30 \times 746 \rm \;watts}{0.87}\\\\&= 25.724 \;\rm kW \end {aligned}[/tex]
Line current is calculated as:
Given,
Input power (IP) = 25.724 kW
Input voltage (IV) = 230 Volt
Solving for line current:
[tex]\begin{aligned} \text{Line current} &= \rm \dfrac{IP}{IV}\\\\&= \dfrac{25.724 \times 10^{3}}{230}\\\\&= 111.843 \;\rm A \end{aligned}[/tex]
Therefore, the total input power of the shunt is 25.724 kW, and the line current is 111.843 A.
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A binomial probability experiment is conducted with the given parameters. n=12, p=0.45, x<4 compute the probability of x success in the n independent trials of the experiment
a binomial probability experiment is conducted with the given parameters compute the probability of X successes in the n independent trials with experiment
Answer:0.1088 or 10.88%
Step-by-step
q = 1 - 0.35 = 0.65
P(X=2) = 12C2 × (0.35)² × (0.65)¹⁰
= 0.1088
Explanation:
A strong thunderstorm just knocked out the power of the entire space center. Who should the team contact to make sure their equipment is still in working order?
the Mission Control Center
CAPCOM
Ground Control
the Flight Director
The flight director manages the flight controllers who work in the Mission Control Center. Flight director make sures the International Space Station is operated safely or not. He leads the planning and coordination of all activities. He approves any procedures to protect the space station and crew. Thus the correct option is D.
What is the function of ground control team?The GC team is responsible for the ground systems infrastructure and ground communications necessary to perform planning, training, testing, execution and evaluation of human spaceflight mission operations.
Capcoms represent both the technical control team on the ground and astronauts in orbit.
A mission control center is a facility that manages space flights, usually from the point of launch until landing or the end of the mission. It is part of the ground segment of spacecraft operations.
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The average repair cost of a microwave oven is 55$, with a standard deviation of 8$. the costs are normally distributed. If 12 ovens are repaired, find the probability that the mean of the repair bills will be greater than 60$.
The probability that the mean of the repair bills for 12 microwave ovens will be greater than $60 is 0.015 or about 1.5%.
What is Probability?The distribution of the sample means for repair costs of 12 microwave ovens can be approximated to a normal distribution, with a mean of the population repair cost, μ = $55 and a standard deviation of the sample mean, σ/√n = $8/√12 ≈ $2.31.
We need to find the probability that the sample mean is greater than $60. Using the formula for z-score:
z = (x - μ) / (σ / √n)
= (60 - 55) / (2.31)
≈ 2.16
We can look up the area under the standard normal distribution curve for z-score 2.16 in a z-table or calculate it using software. The probability is approximately 0.015.
Therefore, the probability that the mean of the repair bills for 12 microwave ovens will be greater than $60 is 0.015 or about 1.5%.
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which kind of the crystal structure has the feweest slip direction and therefore the metals with this structures are the generally more difficult to deform at room temperature ?
Answer:
HCP
Extra -> BCC the most, FCC between
Explanation:
4 Select the correct answer. A brand selling home appliances conducts a customer survey. The following table indicates the results of the survey. What percent of people are satisfied with the company and are likely to be loyal to the brand? OA 9% B. 12% О с. 14% OD. 45% О Е. 60%
An 8cm water jet with a velocity of 25m/s impinges on a single vane in same direction at a velocity of 20m/s. If β2 = 160o and friction losses over the vane are such that v2 = 0.8v1, calculate the force exerted by water on the vane, and its direction.
a. An 8cm water jet with a velocity of 25m/s impinges on a single vane in same direction at a velocity of 20m/s. If B2 = 1600 and friction losses over the vane are such that v2 = 0.8v1, calculate the force exerted by water on the vane, and its direction. (14 Marks) b. A closed vertical cylinder 400mm in diameter and 500mm high is filled with oil of relative density 0.9 to a depth of 340 mm, the remaining volume containing air at atmospheric pressure. The cylinder is rotated around its vertical axis at such a speed that oil just begins to uncover the base. Calculate the speed of rotation for this condition. (8 Marks) c. A point A on the free surface of a free vortex is at radius 250 mm and height 180mm above datum. If a free surface at a distance from the axis of the vortex, which is sufficient for its effects to be negligible, is 220mm above datum, calculate the height above datum of a point B on the free surface
Write a Person class with a constructor that accepts the following details:
1. First name
2. Middle name
3. Last name
4. Date of birth (entered in this pattern 22-02-2000)
5. Gender (male, female)
6. Identity number (private attribute)
7. Mobile number (if any)
Provide a method getAge that calculates the persons' age from his date of birth.
If the user provided his mobile number you have to check if it is a valid number with the pattern 999-
999-9999 if not, show him an error message and do not save the number Provide a method getAge that calculates the persons' age from his date of birth.
If the user provided his mobile number you have to check if it is a valid number with the pattern 999-
999-9999 if not, show him an error message and do not save the numberWrite two classes called Student and College that represents a student and a college in a university. College class: - The constructor of the College class should accept the name of the college and the capacity, and you have to generate a shortcut of the name by taking the first character of each word in the name (e.g., Information Technology becomes IT). - Provide a method called updateTotalStudents that increments the total number of students at this college. You have to check if the total number is in the range of the capacity, if not you have to present a suitable message for the student and let him/her choose another college. You can set the capacity as 3 students for testing purposes. - Provide a method called getInfo that prints the information about specific college in a wellorganized appearance.
The person class is an illustration of constructors;
In computer programs, constructors are automatically called when the object of a class is created
The program in C++The class and the constructor program written in C++ programming language is as follows:
int main(){
string fname, lname,dob,idno,mobileno;
cin>>lname; cin>>fname; cin>>dob; cin>>idno; cin>>mobileno;
Person c(fname,lname,dob,idno,mobileno);
if(mobileno.length() == 12){
if(mobileno[3] == '-' && mobileno[7] == '-'){
cout << "Name: " << c.getfname() << " " << c.getlname() << endl
<< "Date of birth: " << c.getdob() << endl
<< "ID number: " << c.getid() << endl
<< "Mobile: " << c.getmobile() << endl
<< "Age: "<< getAge(dob)<<endl;
;
}
}
The complete program is added as an attachment
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