Only the horizontal component (the component parallel to the floor) of tension does work on the block. This parallel component has magnitude
(30 N) cos(20°) ≈ 28.2 N
and acts over a distance of 3.0 m, so it performs
(28.2 N) (3.0 m) ≈ 85 J
of work
A rock is projected from the edge of the top of a building with an initial velocity of 12. 2 m/s at an angle of 63° above the horizontal. The rock strikes the ground a horizontal distance of 25 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. What is the time?.
The rock travels a horizontal distance x after time t of
x = (12.2 m/s) cos(63°) t
If it hits the ground 25 m away from where it was thrown, then for some time t we have
25 m = (12.2 m/s) cos(63°) t
Solve for t :
t = (25 m) / ((12.2 m/s) cos(63°))
t ≈ 4.5 s
Two football players are running toward each other. One football player has a mass of 105 kg and is running at 8. 6 m/s. The other player has a mass of 90 kg and is running at -9. 0 m/s. What is the momentum of the system after the football players collide? 93 kg · m/s 1,713 kg · m/s. 810 kg · m/s. 903 kg · m/s.
The correct answer is P = 1740 kg · m/s, we got this answer by applying the momentum expression which is P = Δ(mv), based on the fact that the mass is not constant
Given data
Mass of Player one = 105kg
Mass of Player two = 93Kg
The Velocity of Player one = 8.6m/s
The Velocity of Player two = -9.0m/s (the negative sign indicates the opposite direction to player one)
Applying Newton’s Second Law in Terms of Momentum because the mass is not constant
When Newton’s second law is expressed in terms of momentum, it can be used for solving problems where mass varies,
We also want to assume that the players stuck together after the collision
An inelastic collision, in contrast to an elastic collision, is a collision in which kinetic energy is not conserved due to the action of internal friction.
P = M1V1 + M2V2
P= 105*8.6+93*9.0
P = 903 +837
P = 1740 kg · m/s.
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How can you tell the artist of the image above was untrained?.
Answer:
where's the image
Explanation:
.........
English nobles resisted peasant demands such as those described in the passage because agricultural labor in many parts of fourteenth-century afro-eurasia had become scarce as a result of which of the following developments?.
Answer: Significant increase in mortality due to the spread of epidemic diseases.
Explanation:
During the 14th century, many parts of Europe and Asia were completely ravaged by an epidemic plague called The Black Death. It was a form of bubonic plague caused by rats infected by bacteria.
More than half of the population of Europe was killed due to his plague, which immediately creates a shortage of labor. Shortage of labor, including agricultural ones, immediately meant that the living ones would receive a higher wage, to the consternation of the landowners who pushes for legislation that would return the status quo to how it was prior to the Black Death. This enrages the peasants who worked for them; manifesting in several revolts from May to November 1380.
if I give you points and you give me no points how many points do you have?
Then the person you gave points to would have however many you gave them. You would subtract from what you have and add that amount to the other person's, you'd need to add context for this question to actually get help
Explanation: You would have no points and I would have however many points you gave me.
Where can you find your state specific lottery information.
Answer:
lottery district offices
Explanation:
Lottery district offices can be found your state specific lottery information.
What is a definition of lottery?A lottery is a low-odds process or game of chance in which winners are chosen at random. Lotteries can be utilized in decision-making circumstances, such as the distribution of scarce medical care and the selection of sports teams.
With a set of numbers, the lottery game is played in finance. Either manually or automatically, the numbers are selected at random. The picked numbers are intended to win prizes. The prize money may be awarded to the winner as a flat sum or in installments. In general, prize winners prefer receiving a lump sum of money.
The Dutch noun "lot," which means "fate," is where the English word "lottery" originates. The Golden Ambrosian Republic launched the first known Italian lottery on January 9, 1449, in Milan to raise money.
Thus, Lottery district offices.
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I had $3. 0. My mom gave $10. 0. My dad gave $30. 0. My aunt and uncle gave me $100. 0. I had another $7. 0. How much did i have?.
Answer:
$250 or $150
Explanation:
3 + 10 + 30 + 100 + 100 + 7 = $250
unless you meant your aunt and uncle didn't give you $100 each then it would be $150.
3 + 10 + 30 + 100 + 7 = $150
In a classic series of studies, solomon asch showed that an individual can conform to a group's judgment of the lengths of lines.
Based on research studies, in a classic series of studies, Solomon Asch showed that an individual can conform to a group's judgment of the lengths of lines "even when the group judgment was incorrect."
What is Solomon Asch Conformity Experiment?Solomon Asch Experiment was conducted in 1955 to study the effect of majority or groups on individual beliefs and opinions.
The study's outcomes showed that people would conform with a group, even if they believe or understand it is wrong.
Hence, in this case, it is concluded that the correct answer is "even when the group judgment was incorrect."
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Because the transition into american culture was difficult many immigrant families.
People move for different reasons. Because the transition into American culture was difficult, many immigrant families moved into neighborhoods with people from the same country.
The old immigrants were known to have arrived in America in the 1800's were from Northern Europe. A lot of many immigrants traveled to America in haste as most of them did not a lot of money.
Immigrants in one way or the other did change American culture. Immigrants were known to expand Culture by bringing in New Ideas and Customs.
Due to the fact that the transition into American culture was hard, a lot of people find other alternatives.
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Would sound waves travel slower through air at the north pole or at the equator?.
yes they would travel slower at the north pole than the equator because the air is more dense and is harder to pass through
Yes, sound waves would travel slower at the North Pole than at the equator because the air is denser and is harder to pass through.
What are equators?The Equator is the midline of the earth. A vibration results in a sound. We refer to these motions as "sound waves." Sound waves require a specific medium to travel through. The three different types of media are solid, liquid, and gas.
Keep in mind that since a "solid medium" is denser than the other two, sound waves move through it more quickly. Because water is more densely packed with particles than gas is, sound waves travel faster in liquid than in gas (such as air).
Therefore, yes, because the air is heavier and more difficult to get through at the North Pole than it is at the Equator, sound waves would move more slowly there.
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Which 4 statements regarding the chart of accounts are true?.
The statements that are true regarding the charts of accounts are:
They organize finances.Offer finances to investors/shareholders.They give clearer insight to financial health.Help financial statement by separating expenditures, revenues, assets and liabilities.Charts of accountCharts of account is an index of all financial records in the general ledger of a company. It is a tool that provides a dissolvable breakdown of all financial transactions of a company during a specific period.
AccountAn account is a report or description. It can be defined as keeping records of an financial transactions related to an individual or entity.
Please note that this question is incomplete, so the answer was given to help.
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A student wants to prove that the base angles of an isosceles triangle are congruent.
There are different kinds of triangles. The options that could be used as part of the proof that B = C are;
≅ because of the Symmetric Property≅ because of the definition of a midpoint
≅ because of the definition of an isosceles triangle
∠ ≅ ∠ because corresponding parts of congruent triangles are congruent.
Isosceles triangles is known to have at least two congruent sides and also at least two congruent angles.
The congruent sides is referred to as legs that create the vertex angle. The other two congruent angles are known to be the base angles.
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A student wants to prove that the base angles of an isosceles triangle are congruent. The student draws isosceles triangle ABC with base angles B and C.
Point M is drawn as the midpoint of BC.
Which of the following could be used as part of the proof that B = C? Select all that apply
True/false: bolsa thinks they should go to the zoo. True false.
Answer:
True
Explanation:
The given statement is true that bolsa thinks they should go to the zoo, from the story Sancho and Bolsa.
Who is Bolsa in the story?Bolsa was a cartel founding member and close ally of Don Eladio and Hector Salamanca. His brother is the chief of police. He is a high-ranking member of The Cartel, having co-founded it with his boss Don Eladio and Hector Salamanca.
Juan Bolsa is a high-ranking member and co-founder of the Salamanca Cartel, which includes the Salamanca family and Gustavo Fring.
He also worked for a time with drug lord Gustavo Fring before the latter betrayed him and had him killed. Juan Bolsa, a Cartel major lieutenant, hired them to steal Lalo Salamanca's bail money, which totalled $7 million.
Therefore, the given statement is true, that the bolsa believes they should go to the zoo.
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Which of the following types of receptors are located in the mouth?.
Answer:
A taste receptor is a type of cellular receptor which facilitates the sensation of taste. When food or other substances enter the mouth, molecules interact with saliva and are bound to taste receptors in the oral cavity and other locations.
What number is 4 times as many as 25.
Answer:
100
Explanation:
multiply them..... .... . .. . . . . . . . . . . I had to reach the character limit
Which of the following is most clearly an example of a theme.
a mid-ocean ridge is located at the boundary of two tectonic plates which diagram correctly models the relative plate motion on each side of a mid-ocean ridge
Thank you for sharing this question, if you could please add a file or pictures of the answers I'll be happy to help.
Two scientists want to compare their research of fireflies. Which information must the two scientists provide to each other to determine if they studied the same type of fireflies?.
Answer:
the species name of firefly studied
Bun and cheese are very yummy. is this gramaticaly correct?
Answer:
NO
example: I enjoy a variety of cheese and buns as they are tasty
Explanation:
Answer:
No, its wrong try to look it up or something !
Isaiah, a vibrant young boy, is the leader of a school debate team that is competing with a team from another school. He believes that his team is moral and strong, while the other team members are weak and evil. In the context of misperception, isaiah most likely exemplifies ________ in this scenario.
Considering the situation described above, in misperception, Isaiah most likely exemplifies mirror-image perception in this scenario.
What is mirror-image perception?Mirror-image perception is a term that is used in a socio-psychological context to describe how individuals perceive themselves as the opposite of their competitors.
Usually, in Mirror-image perception, individuals tend to see themselves as an excellent and peace-loving personality, while the other is viewed as the evil and devil advocate.
How Mirror Image Perception is applicable hereTherefore, since Isiah believes that his team is moral and strong, while the other team members are weak and evil, this is an example of Mirror image perception.
Hence, in this case, it is concluded that. the correct answer is Mirror image perception.
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Which best describes the first law of thermodynamics as compared to the second law of thermodynamics?.
Answer:
The first law describes how thermal energy is conserved but not the direction it moves.
Thermodynamics is demonstrated as the branch of physics that deals with the associations or relationships between heat and other energy forms like mechanical, chemical, and electrical).
As per the question, the first law discusses that heat is a kind or form of energy and thus, processes associated with thermodynamics are subject to energy conservation principle. Therefore, heat energy can neither be destroyed nor created but rather transferred to one place to another and converted to and from other energy forms.
Thus, the first law of thermodynamics is distinct from the second law as 'the former describes how thermal energy can be conserved to and from other forms of energy and not the direction in which it moves' while the second law focuses on entropy.
Explanation:
One of your authors once attended a training session where the instructor shared that they did not believe in the dsm or in using diagnoses. This person believed that diagnoses were much like rumors, that they had the potential to lead toward specific beliefs and assumptions about a person. And like rumors, they may also lead to negative biases. Rumors aside, what are some ways that psychological diagnoses may inadvertently lead to prejudice? in extreme cases, how might they lead to discrimination? are there any specific diagnoses that may be more prone to negative biases, particularly by those not familiar with psychology?.
Based on the information given, the biggest disadvantage of assigning a diagnosis is that it can be stigmatizing and bring about a negative bias for the client.
For the patient, it should be noted that facing prejudicial attitudes or biases can lead to shame and lowered self-esteem.
A typical stereotype that is associated with those with mental illness is that they're irresponsible and unreliable. Among all the mental illnesses, schizophrenia is most negatively perceived in my view. Such people having it may be more prone to negative biases.
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Sea level is currently rising at 5 mm/yr, and scientists predict that global warming could cause a rise in sea level of 7 m if left unabated. How long will it take the sea to rise 7 m at the current rate?.
Answer:
1400 years
Explanation:
Let us convert everything to the same units first. For simplicity, I will convert everything to millimeters.
7 m = 7 m x (1000 mm / 1 m) = 7000 mm
Since the rate is 5, we can use this equation:
rate*time=length
5*years=7000
solve
years=1400
Which of these best describes the point of washington in this excerpt.
Answer:
awnser choice B
Explanation:
B
F(x, y) = e−x + y2, e−y + x2 , c consists of the arc of the curve y = cos(x) from − ???? 2 , 0 to ???? 2 , 0 and the line segment from ???? 2 , 0 to − ???? 2 , 0.
Given that y = cos(x) makes up part of the boundary of C, I suspect you mean the given points to be (-π/2, 0) and (π/2, 0).
I also assume the given vector field is
[tex]\vec F(x,y) = \left\langle e^{-x} + y^2, e^{-y} + x^2 \right\rangle[/tex]
Since [tex]\vec F[/tex] has no singularities on C or in its interior, Green's theorem applies:
[tex]\displaystyle \int_C \vec F(x,y) \cdot d\vec r = \iiint_D \frac{\partial(e^{-y}+x^2)}{\partial x} - \frac{\partial(e^{-x}+y^2)}{\partial y} \, dA = 2 \iiint_D (x + y) \, dA[/tex]
where D is the interior of C, the region
[tex]D = \left\{ (x, y) : -\dfrac\pi2 \le x \le \dfrac\pi2 \text{ and } 0 \le y \le \cos(x) \right\}[/tex]
The integral then reduces to
[tex]\displaystyle 2 \iint_D (x + y) \, dA = 2 \int_{-\frac\pi2}^{\frac\pi2} \int_0^{\cos(x)} (x + y) \, dy \, dx[/tex]
[tex]\displaystyle 2 \iint_D (x + y) \, dA = 2 \int_{-\frac\pi2}^{\frac\pi2} \left( x\cos(x) + \frac12 \cos^2(x) \right) \, dx[/tex]
[tex]\displaystyle 2 \iint_D (x + y) \, dA = 2 \int_{-\frac\pi2}^{\frac\pi2} \left( x\cos(x) + \frac{1 + \cos(2x)}4 \right) \, dx[/tex]
[tex]\displaystyle 2 \iint_D (x + y) \, dA = \frac12 \int_{-\frac\pi2}^{\frac\pi2} \left( 4x\cos(x) + 1 + \cos(2x) \right) \, dx[/tex]
Since 4x cos(x) is an odd function over the symmetric interval [-π/2, π/2], its contribution to the integral is 0, and the remaining integral is trivial.
[tex]\displaystyle 2 \iint_D (x + y) \, dA = \frac12 \int_{-\frac\pi2}^{\frac\pi2} \left( 1 + \cos(2x) \right) \, dx = \boxed{\frac\pi2} [/tex]
What is one drawback shared by both monopolies and oligopolies.
Answer:
They can harm consumers by fixing price
What is the greatest possible speed at which a girl.
Answer:
about 6.5mph
Explanation:
average human can run aout 6.5 to 8 mph
What factors would have the least effect on a region’s climate?.
Answer:
Longitude and Population Density
Explanation:
Longitude
Longitude won't have much effect because it is just across the earth in E to W. (east to west). While, Latitude will affect the Earth because there is something called a Equator, which is USUALLY hot, and the Polar zones, which are mostly Cold.
Population Density
Population Density won't affect much because the amount of carbon dioxide a person produces is pretty less. But yeah, the factories make a lot of more Carbon Dioxide so that is why they will be producing more than the people. But people can't produce so much to warm up their environment.
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Which of the following about a contour line is false?.
The statement from the given options that is false about contour lines is;
Option B; Contour lines can cross.
The missing options are;
A. Contour lines form a "V" that points upstream.
B. Contour lines can cross.
C. Contour lines connect points of equal elevation.
D. Concentric contour lines may indicate a hill.
To answer the question, we need to first understand what contour lines are.
Contour lines are lines that are used on topographic maps to show elevations, landform shapes, and slope stiffness. It can also be used to show population density and average income.
An example of a contour lines are Isotherms which means lines of equal temperature.
Now, contour lines do not cross each other but instead will form a v-shape.
Looking at the options, the only one that doesn't apply to contour lines is Option B
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Which presidential campaign slogan best demonstrates an unwarranted extrapolation?.