A 60 g ball is tied to the end of a 70 -cm-long string and swung in a vertical circle. The center of the circle, as shown in the figure,(figure 1) is 150 cm above the floor. The ball is swung at the minimum speed necessary to make it over the top without the string going slack.
The tension in the string an instant before it broke is; T = 0.86 N
What is the Tension in the string?
We are given;
mass of ball; m = 60 g = 0.06 kg
Length of string; L = 70 cm = 0.7 m
Height the ball reaches; h = 150 cm = 1.5 m
From Newton's equation of motion;
v² - u² = 2as
where v = 0 m/s Thus;
-u² = 2(-9.81 * (1.5 - 0.7)
u² = 15.696
u = √15.696
u = 3.17 m/s
Thus, tension is;
T = mu²/L
T = (0.06 * 3.17²)/0.7
T = 0.86 N
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Pam started watching a movie at 2:53 p. M. The movie was 1 hour and 52 minutes long. After the movie, pam rode her bike for 46 minutes. When did pam finish riding her bike?
Pam finished her bike ride at 5:31 p.m.
How to calculate the time Pam finished her activities?To calculate the time that Pam finished her activities (watching a movie and riding her bike) we must add the number of minutes that she used for these two activities and then add this number of minutes to the time that she started her activities. (2:53 p.m.)
She started at 2:53 p.m.She watched a movie that was 1 hour and 52 minutes long - she finished watching the movie at 4:45 p.m.She rode her bike for 46 minutes - she finished riding her bike at 5:31 p.m.Learn more about time in: https://brainly.com/question/26941752
If you subtract 0. 3 from a certain number, add 0. 4 times the original number to the result, and then add another 2. 78, you'll get 25. What was the original number?
The questions on a test consist of 10 multiple choices, 3 essays, and 9 free responses. If the questions are ordered randomly, what is the probability that the first question is a free response?
Answer:
9/22 or 40.9%
Explanation:
Probability describes the likelihood of an event. To find simple probability, like in this question, use division.
To find the probability of the first question being a free response, you first need to find the total number of questions. This can be done by adding together all of the given information. There are 10 multiple choice, 3 essays, and 9 free responses.
10 + 3 + 9 = 22This means that there are 22 total questions. Next, find how many of these questions are free-response. We know that there are 9 free responses and 22 questions in total. So, 9 out of 22 are free responses. This can be rewritten as 9/22.
If you want to find the percentage, simplify the fraction and convert it to a percentage.
9/22 = 0.409Then, move the decimal 2 places to the right. This gives you 40.9%, which is the probability of the first question being a free-response.
Two practical actions learners could take to improve their chances of receiving a bursary for tertiary education
Two learners could take to improve their chances of receiving a bursary for tertiary education by:
Appling for it early. Working hard at school. Follow the application procedures, etc.What is bursary about?Bursaries are known to be a form of financial aid that helps a person to further their education and study any course they like.
A bursary is one that can cover half or all the study fees. It is one that can also handle your transportations, housing, study material, living expenses and others.
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Which of the following correctly describes how heat behaves.
Explanation:
heat travels from a region lower concentration to a region of higher concentration
SITE in full sentence
Answer:
There is a site under work at that town. The site is a work in proggres.
Explanation:
Answer:
Site sentence example. He gave us access to a web site on which to submit our information.
Which value of x makes the equation 0. 75(x + 20) = 2 + 0. 5(x - 2) true?
Answer:
-56
Explanation:
From the equation:
0.75(x + 20) = 2 + 0.5(x - 2)
Open brackets
0.75x + 15 = 2 + 0.5x - 1
Collect like terms
0.75x - 0.5x = 2 - 1 - 15
0.25x = - 14
Divide both sides by 0.25
x = -56
A stop sign is in the shape of regular octagon. What is the measure of each of the interior angles of the stop sign?
Answer: 135 degrees
Explanation:
The measure of an interior angle of any polygon is (n-2)*180/n, where n is the number of sides in the polygon.
Since the stop sign is an octagon, there are 8 sides, so we can plug in 8 for n.
Therefore, the measure of each interior angle is (8-2)*180/8
= 6*180/8
= 1080/8
= 135 degrees
How long will it take to go 150,000 meters traveling at 50 km/hour?
Answer:
3 hours
Explanation:
1. Convert 150,000 meters into kilometers - 150,000 ÷ 1000 = 150 kilometres
2. Use the equation: time = distance ÷ speed
3. Substitute in the known values: time = 150 km ÷ 50 km/h = 3 hours
Hope this helps!
Answer:
3 hours
Explanation:
First, you have to convert meters to kilometers.
150,000 meters ⇒ 150 kilometers
Then you divide 150 by 50 and see what you get:
150 ÷ 50=3
It will take 3 hours to go 150,000 meters at 50 km/hour
Hope this helps! Please let me know if you need more help, or if you think my answer is incorrect. Brainliest would be MUCH appreciated. Have a great day!
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Answer:
I believe the answer that you chose (D. Processing minerals) is correct, good job!
Explanation:
you're correct :)
Answer : The Answer That You Chose (D. Processing Minerals) Is Correct
What role did jade and obsidian play in the mayan economy?
Answer:
Jade and obsidian were traded by the Mayan through an extensive network.
Explanation:
Why grade 12 learners should write their nbts as early as possible.
The reason why grade 12 learners should write their nbts as early as possible is; it is their primary requirement to go to the university and to apply for scholarship
What is the importance of writing NBT?NBT stands for national benchmark test and it is defined as a national test which must be written and passed by High school students that intend to go to the university ( i.e. passport to the university ).
Now, it is very important for grade 12 learners to write is as early as possible because it is their primary requirement to go to the university and to apply for scholarship.
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Chlorofluorocarbons (cfcs) such as cf2cl2 are refrigerants whose use has been phased out because of their destructive effect on earth's ozone layer. The standard enthalpy of evaporation of cf2cl2 is 17. 4 kj/mol, compared with δh°vap = 41 kj/mol for liquid water.
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Buzz appliances manufactures two products: food processors and espresso machines. The following data are available: food processors espresso makers sales price $125 $225 variable costs $80 $190 the company can manufacture either two food processors per machine hour or three espresso machines per machine hour. The company's production capacity is 1,600 machine hours per month. To maximize profits, what product and how many units should the company produce in a month (assuming unlimited demand for both products)?
In order to maximize profit, 4800 Expresso machines and 0 food processors should be produced.
How to maximize profitFrom the information given, the contribution margin per hour for Expresso makers will be:
Sales price = $225
Less: Variable cost = $190
Contribution margin = $35
Units per hour = $3
Contribution margin per machine hour = $35 × 3 = $105
Also, the Contribution margin per machine hour for food processor is $90.
Number of units available = 1600
Units per machine hour = 3.
Units to manufacture = 1600 × 3 = 4800
Therefore, to maximize profit, 4800 Expresso machines and 0 food processors should be produced.
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Discuss how your personal self worth may help you achieve the grades that may enable you to follow the career of your choice.
Answer:
Adopt positive mental attitude,work out where your falling short,Talk to your teachers and pay more attention in class also ask questions
Part b: which two of the following paragraphs best support the answers to part a?
Wolsey industries inc. Expects to maintain the same inventories at the end of 20y8 as at the beginning of the year. The total of all production costs for the year is therefore assumed to be equal to the cost of goods sold. With this in mind, the various department heads were asked to submit estimates of the costs for their departments during the year. A summary report of these estimates is as follows:
1. The estimated income statement for 20Y8 is: $350,000.
2. The contribution margin ratio is 25%.
3. The Break-even sales in units and dollars is 13,125 and $2,100,000.
4. The Margin of safety in dollars is $1,400,000.
5. The operating leverage is 2.5.
Income statement1. Income statement for 20Y8
Sales $3,500,000
(21,875×$160)
Cost of goods sold $2,518,750
[($46+$40+$20×21,875)+$200,000]
Gross profit $981,250
($3,500,000-$2,518,750)
Selling expenses $366,475
[($110,000+$40,000+$12,000+$7,600)+ ($8+$1×21,875)]
Admin expense $264,775
[$132,000+$10,000+$13,400)+($4+$1×21,875)]
Total expenses $631,250
($366,475+$264,775)
Operating Income $350,000
( $981,250-$631,250)
2. Contribution margin ratio
Contribution margin ratio=[$3,500,000-(120×21,875)]/3,500,000
Contribution margin ratio=[$3,500,000-$2,625,000]/3,500,000
Contribution margin ratio=$875,000/$3,500,000×100
Contribution margin ratio=25%
3. Break-even sales in units and dollars
Break-even sales= ($525,000/$40)
Break-even sales in units=13,125
Break-even sales in dollars=($525,000/25%)
Break-even sales in dollars=$2,100,000
4. Margin of safety in dollars
Margin of safety in dollars=($3,500,000-$2,100,000)
Margin of safety in dollars=$1,400,000
5. Operating leverage
Operating leverage=($875,00/$350,000)
Operating leverage=2.5
Inconclusion the estimated income statement for 20Y8 is: $350,000.
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The organism that is in longest reign and is relative to the percent of time dominating the surface of earth.
Answer:
the barosphere is made up of the parts of Earth where life exist over a long period of time the outer sphere develops a mix of oxygen
A silo (base not included) is to be constructed in the form of a cylinder surmounted by a hemisphere. The cost of construction per square unit of surface area is times as great for the hemisphere as it is for the cylindrical sidewall. Determine the dimensions to be used if the volume is fixed at cubic units and the cost of construction is to be kept to a minimum. Neglect the thickness of the silo and waste in construction
The dimensions to be used if the volume is fixed at cubic units include:
Surface area of a cylinder is 2πrh +2πr² Volume of cylinder = πr²h Volume of a hemisphere = 2/3 π r³ Surface area of a sphere = 4πr²What is Volume?This is defined as the amount of three-dimensional space enclosed by a closed surface.
The dimensions which can be used are shown above where r is radius and h is height.
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How does the author use anastasia’s dialogue to develop her character in this passage? to clarify keri’s dialogue to reinforce keri’s dialogue as a contrast to keri’s dialogue as an addendum to keri’s dialogue.
Answer:
the answer to your question would be to clarify Keri’s dialogue
Explanation:
took the test
Answer:
A
Explanation:
Examine a centers for disease control advertising campaign that promotes the influenza
The CDC campaign promotes the influenza vaccine by telling people they are not only protecting themselves but protecting others.
What is advertising?Advertising is a type of communication that aims at persuading. This includes persuading people to act in a specific way.
In what way is influenza promoted?Influenza vaccine is promoted using different strategies. In the case of the CDC (Centers for disease control and prevention), they released an advertisement showing a man with his shirt sleeve up and with the words "We all have a role in protecting each other".
Based on this, we can conclude this specific campaign promotes influenza by making people feel responsible for their health and others' health.
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Two common ions of manganese are mn2+ and mn3+. Which binary ionic compound is likely to form?
Answer:
MnO
Explanation:
The other compounds imply oxidation states of N, Br and Cl that does not exist.
Why is the normal range for the mass of dna in a male cat cell lower than for a female cat?
Answer:
Explanation:
This is because Y chromosomes are smaller than X chromosomes so the mass of DNA is smaller in male cells than in female cells.
Hope this was helpful :)
Erica and amy started biking in opposite directions.
A perfect score in a game is 300 points. You get a perfect score if you knock down 120 pins. Find what percent 120 is of 300. Then express the percent as a decimal
Answer:
0.4 percentage
Explanation:
120 / 300 = .4
Which information can be found in both the biography and autobiography.
Answer:
The story of someone's life
Explanation:
Biography is writing about another persons life.
An Auto-biography is when you write about your own life.
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The Information that can be found in both Biography and Autobiography is mostly same the only difference we see is experiences of the person in different point of view.
Biography: A collection of someone's life experiences and struggles is written by someone.
Autobiography: A collection of experiences that he went through in his life written by himself.
Information found both in biography and autobiography is same which deals with the nonfictional stories or events like overview of the personality, experiences and events that changed or shaped the person or effected the person.
Compared to biography autobiography is more authentic and make you feel connected to the person as the person who had experienced the events in life can explain us more than an person who is inspired from other person.
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>calculate the average rate of change for the graphed sequence from n = 2 to n = 4.
Is he cool?
A: Yes
B: Maybe
C: No
D: He is cool and smart
E: None of the above
F: He is rich
Answer:
Yes because he can be a learly good friend to hang out with
Answer:
D.
Explanation:
HE IS COOL AND SMART or F he is rich?
What is a major division between gravity and the electromagnetic force on one hand and the nuclear forces on the other?(1 point).
Gravity is force present between masses while electromagnetic forces are found between charges.
Nuclear forces are short range while electromagnetic forces are long range.
Electromagnetic force Vs Nuclear forceNuclear force are short ranged while electromagnetic forces cover a wider range, it is dependent on the charges present. Unlike charges attract each other while like charges repel each other in electromagnetic forces.
Nuclear forces occur in the nucleus of an atom and it an attractive force. unlike electromagnetic forces nuclear force do not repel.
Hence we can conclude that ; Gravity is force present between masses while electromagnetic forces are found between charge and Nuclear forces are short range while electromagnetic forces are long range.
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Answer: C: Gravity and Electromagnetic force have infinite ranges and nuclear have small ranges
Explanation: I took the test today and promise it's right