
math
the second hand of a watch is 15mm long. what is the linear velocity of the tip in m/s?

Chemistry
The hydroperoxide ion, HO2–(aq), reacts with permanganate ion, MnO4–(aq) to produce MnO2(s) and oxygen gas. Balance the equation for the oxidation of hydroperoxide ion to O2(g) by permanganate ion in a basic solution.

English Anyone who has read The Odyssey
What is the effect of the epic simile in lines 118131 of the excerpt from the Odyssey, Part 3? Sometimes in farmyards when the cows return wellfed from the pasture to the barn, one sees the pens give way before the calves in tumult, breaking through to

Geometry
1  Complete this statement: A polygon with all sides the same length is said to be___. a. regular b. equilateral *** c. equiangular d. convex 2 A road sign is in the shape of a regular heptagon. What is the measure of each angle on the sign? round to the

English 11A Please Help.
In three to five sentences, explain how Ambrose Bierce's use of foreshadowing or flashback influence "An Occurrence at Owl Creek Bridge."

PHYSICS!!
An amusement park ride consists of a rotating circular platform 8.26 m in diameter from which 10 kg seats are suspended at the end of 1.14 m massless chains. When the system rotates, the chains make an angle of 16.2 degrees with the vertical. The

Math
Find the value(s) of a making v =6ai−3j parallel to w =a^2i+9j . a=

History
What did the first civilization in Asia and Africa have in common? A They emerged along sea coast b. They had organized governments c. They lacked social hierarchies d. They practiced monotheism. My answer is D

social studies
how were the lives of white people in the north and south alike and different

chem
A ground state hydrogen atom absorbs a photon of light having a wavelength of 92.30 nm. It then gives off a photon having a wavelength of 384 nm. What is the final state of the hydrogen atom? Values for physical constants can be found here.

Science 7A
Force and Work Unit Test 7A 1. A person pushes a box. He applies a force of 400 newtons, and he pushes the box for a distance of 4 meters. After he stops pushing, the box slides forward another meter. How much work was done by the person? (1 point) a.

ELAHELP SOMEONE OR MRS.SUE PLEASE
The restatement of a claim and summary of the supporting evidence in an argument is called the _______(1 point) 1.overview. 2. conclusion. 3. main points. 4. wrapup.

Science
What is a newton?(1 point) a force that changes the motion of an object a force that pulls objects toward the ground the unit in which force is measured a noncontact force

science
Which compound is a product of photosynthesis? carbon dioxide water oxygen*** ATP What happens to the energy released during cellular respiration? Carbon dioxide stores the energy. Glucose stores the energy. Oxygen stores the energy. ATP stores the

science
1.Which car has the greatest efficiency?(1 point) a 900 kg car that travels 15 km per liter of fuel a 900 kg car that travels 20 km per liter of fuel a 1,200 kg car that travels 15 km per liter of fuel a 1,200 kg car that travels 20 km per liter of fuel

History
1. Based on the information on the map, what can you infer about industry in the United States? (1 point) Manufacturing was a key part of the economy in the Northeast. Agriculture was the major industry in the South. Mills in the Northeast had to be close

Physics
You weigh 710 N. What would you weigh if the Earth were seven times as massive as it is and its radius were six times its present value? Answer in units of N.

math
Three numbers form a geometric progression. If the second term is increased by 2, then the progression will become arithmetic and if, after this, the last term is increased by 9, then the progression will again become geometric. Find these three numbers.

math
HOW MANY PENNIES DOES IT TAKE TO MAKE $500?

ART 4 QUESTIONS PLZ HELP ASAP
1.A marble structure has been repaired and is ready for display. Which two specialists might work together to create written information tags for the display? A. Conservator and archaeologist B. archaeologist and curator C. curator and art historian**** D.

Algebra
1. you and a friend balls for like a salad and a small drink. between the two of you, you have $8.00. A salad costs $2.49 and a small drink is $0.99. Can either of you have a second salad or a drink? assume there is no sales tax. A.yes,one Salad B.yes,one

Chemistry
Naturally occurring cobalt consists of only one isotope, 59Co, whose relative atomic mass is 58.9332. A synthetic radioactive isotope of cobalt, 60Co, relative atomic mass 59.9338, is used in radiation therapy for cancer. A 1.8276g sample of cobalt has an

math
1. Which angles are adjacent angles? (1 point) ∠GBM and ∠FBC ∠CBX and ∠FBC ∠XBG and ∠FBC ∠MBY and ∠FBC 2. The measure of ∠3 is 101°. Find the measure of ∠1. (1 point) 101° 106° 74° 79° 3. Is line l parallel to line m? Explain.

Math
If sin(x) = 1/3 and sec(y) = 29/21 , where x and y lie between 0 and π/2, evaluate the expression using trigonometric identities. (Enter an exact answer.) cos(2y)

physics
A thermometer of mass 0.0550 kg and of specific heat 0.837 kJ/kg•K reads 15.0°C. It is then completely immersed in 0.300 kg of water, and it comes to the same final temperature as the water. If the thermometer reads 44.0 °C, what was the temperature of

physics
The force required to stretch a Hooke’slaw spring varies from 0 N to 62.4 N as we stretch the spring by moving one end 17.2 cm from its unstressed position. a) Find the force constant of the spring. Answer in units of N/m b) Find the work done in

maths
calculate the surface area of the following prism cuboid; 2cm 6cm 4cm what is the surface area of the cuboid

calculus
The function f is continuous on the closed interval [0,6] and has values that are given in the table below. x 0246 f(x)4K812 The trapezoidal approximation for(the integral): 6 S f(x) dx 1 found with 3 subintervals of equal length is 52. What is the

calculus
Let f be a differentiable function such that f(3) = 2 and f'(3) = 5. If the tangent line to the graph of f at x = 3 is used to find an approximation to a zero of f, that approximation is? So confused

Earth Science A
The evidence related to the Big Bang theory primarily supports which of the following ideas? Select the two correct answers.(1 point) A. The universe is cooling to the point where it will start to contract. B. The universe is expanding and warming very

Biology (Answers)
Biology Unit 8 Lesson 11 (Answers) 1. What is the term used to describe homologous chromosomes exchanging genetic material during meiosis? Answer  Crossingover 2. When scientists analyzed the variations of color expressed in monkey flowers, what did they

Science
Biology A Semester Exam 1.Nucleotides contain sugar, a phosphate group, and a nitrogen base. Which of the following is a nitrogen base? guanine 2.The following list includes several examples of chemical groups commonly found in biomolecules:  2 and 3

science
CH4 + 2O2 → CO2 + 2H2O If you change the 2 in front of 2O2 to a 3, what will be the change in the results on the right side of the equation? There are now 3H2O molecules.

Biology
Biology B: Storage of Carbon Quick Check QA, Answer = *** Which reservoir has the largest deposit of carbon? rocks and sediment*** atmosphere oceans (google says it but trust me, I got this question wrong) plant biomass What do plants use for energy?

biology
can somebody pleasse help with the genetic variation unit test Which statement best describes the process of crossing over?(1 point) A. Homologous chromatids pair up, and nonsister chromosomes exchange genetic material. B. Pairs of homologous chromatids

Physics
Lightrail passenger trains that provide transportation within and between cities speed up and slow down with a nearly constant (and quite modest) acceleration. A train travels through a congested part of town at 5.0 m/s. Once free of this area, it speeds

Science
Which statement about an atom is correct?(1 point) The proton has no charge and is found in the nucleus. The electron has a negative charge and is found outside of the nucleus. The neutron has no charge and is found outside of the nucleus. The neutron has

Mathematics
A population of a given bacteria is noted at the following intervals. Hours. 0 1. 9. 12. 18 Population. 400. 520. 4242. 9319. 44982 a) Calculate an algebraic model b) How long does it take for to population to double? c) When will the population reach 1

ELA
Which is a conclusion?(1 point) a persuasive main idea a final piece of evidence a presentation of an argument a summary section Which sentence tells one thing that a conclusion should do?(1 point) It should maintain the style of the essay. It should

math
4 5 of Chris's wire is equal to all of Daniel's. Daniel has 1 3 as much wire as Sarah. In all, their wires measure 8 feet. How long is Daniel's wire in feet

science
connexus students: 1. Pure water and pure salt are poor conductors of electricity. When salt is dissolved in water, the resulting solution conducts electricity well. Which statement explains why this occurs with these substances? a: The process of

Science
1.Which example represents a class 2 lever?(1 point) tweezers plucking hairs salad tongs picking up salad a screwdriver opening a paint can a car door being opened and shut 2 Levers Quick Check 2.Which statement best describes energy?(1 point) Energy is

ELA
How does textual evidence help a reader make an inference?(1 point) a. Readers analyze the details explicitly stated in a text to make an inference. b. Readers eliminate the details implicitly stated in a text in order to make an inference. c. Readers

LA
1.Which of the following is plot?(1 point) the sequence of events in a story a lesson the reader learns the author's purpose for writing a story a problem that a character must solve 2.Which word means “the time and place in which a story takes

Science
1)What is accomplished by this simple pulley' It changes the direction of the force needed to lift the object 2) What advantage does a screw have over a nail A screw can be inserted with less force than a nail. 3) Lifting the weight without a pulley

science
Which are the reactants of photosynthesis? C6H12O6+ 6O2 CO2 + H2O+ ATP C6H12O6 + O2 CO2 + H2O*** One molecule of glucose can release a total of _____ molecules of ATP during its breakdown. 36*** 38 32 34 How is carbon moved between the major reservoirs of

science
1. How do plants recycle carbon during photosynthesis?(1 point) The carbon in carbon gas is recycled as glucose.**** The carbon in glucose is recycled as carbon gas. The carbon in carbon dioxide is recycled as glucose. The carbon in glucose is recycled as

sience
Which new idea did Copernicus introduce that significantly modified the geocentric model of the universe?

Trigonometry
At t = 0 a car is due 2 km north of you heading west moving 13 km/s after 1.5 s. What is the angle in radians between you and the car from where the car was at t = 0?

Chemistry
In Part C, you determined that the proper ratio of packages of buns, packages of patties, and jars of pickles is 3:2:4. If you want to feed at least 540 people, but also maintain the proper ratio, what minimum number of packages of buns, packages of

Math
Three numbers X, Y, and Z are in the ratio 2:7:8. If 12 is subtracted from Y, then three numbers form a geometric sequence (in the order X, Y–12, Z). Find X, Y, and Z. There are two sets of answers I already found one set i am unsure how to find the

Math
Quinzel and Joseph sell shoes. Last month Quinzel sold 18 less pairs of shoes than Joseph. Together they sold 52 pairs. How many pairs of shoes did Quinzel sell? I should be able to figure out the rest, I just need help with the first steps again to get it

Math
1. Classify the triangle according to side length and angle measurement 2. Classify the triangle according to side length and angle 3. Classify the triangle with side lengths 4,4, and 4 4. Classify the triangle with the measuring 69,42, and 68, 5.

Social studies
1. Which situation was affected depending upon whether a state was admitted as a free state or a slave state? A: Representation in congress B: Number of supreme court justices C: Amount of Western land available for settlement D: Existing treaties with

Social studies!!
1.) which of the following were basic principles of the knownothing party? A) antiimmigrant, anticatholic B) less federal government regulation, no abolition C) support women's rights, prison reform ****** D) Spread the second great awakening, encourage

math check my answers please and thank you
select the answer that correctly orders the set of numbers from least to greatest 14% , 1/8 , 0.03 , 0.065 A. 14% 1/8 0.065 0.03 B. 0.065 0.03 1/8 14% C. 0.03 0.065 1/8 14%**** D. 0.03 0.065 14% 1/8 select the answer that correctly orders the set of

Physical Education
Which of the following might be described as a recreational activity? a. Kayaking b. Inline skating c. Tango lessons d. All of the above***

college chem
A sample of O2 gas was collected over water at 23 degrees celsius and 772 torr. what is the partial pressure of the O2?

English
An epic is a narrative or poetic literary work that tells of A.) the traditions of an ancient culture. B.) the adventures of a legendary here. C.) the history and myths of a country. I think it is B..?

math
I need the answers to the why did the banana go out with the prune worksheet. I already have the answer to the riddle, but I need the numeral answers please.

chemistry
Calculate the amount of heat required to completely sublime 76.0g of solid dry ice (CO2) at its sublimation temperature. The heat of sublimation for carbon dioxide is 32.3 kJ/mol.

Calculus
sand is falling into a conical pile so that the radius of the base of the pile is always equal to one half its altitude. of the sand is falling at the rate of 10 cubic feet per minute, how fast is the altitude of the pile increasing when the pile is 5 feet

chemistry
how long would it take for 1.50 mol of water at 100C to be converted completely into steam if heat were added at a constant rate of 18.0J/s?

Math PLZ HELP
1. Which of the following expressions is written in scientific notation? 1. 73.4 x 105 2. 0.09 × 107 3. 80 x 103 4. 4.22 x 10–3 2. Which of the following is 0.0000000708 written in scientific notation? 1. 7.08 x 10–8 2. 7.8 x 10–8 3. 708 x 10–10

chemistry
The air within a piston equipped with a cylinder absorbs 570J of heat and expands from an initial volume of 0.12L to a final volume of 0.88L against an external pressure of 1.0 atm. What is the change in internal energy of the air within the piston?

Physics
The period of motion of an objectspring system is T = 0.474 s when an object of mass m = 296 g is attached to the spring. (a) Find the frequency of motion in hertz. _______Hz (b) Find the force constant of the spring. _______N/m (c) If the total energy of

AP Physics
To test the performance of its tires, a car travels along a perfectly ﬂat (no banking) circular track of radius 120 m. The car increases its speed at uniform rate of at ≡ d v dt = 2.99 m/s 2 until the tires start to skid. If the tires start to skid

Chemistry
Express the concentration of a 0.0510 M aqueous solution of fluoride, F, in mass percentage and in parts per million. Assume the desnity of the solution is 1.00 g/mL Since, we're assuming the density I think that also means were assuming the volume.. but

Chemistry
1) What is the charge on the ion that Selenium forms in an ionic compound? I am not sure about this. 2) What noble gas is isoelectronic with this ion. I was thinking Krypton because it is a noble gas and it is the closest to Selenium but I am not sure. 3)

PreCalculus
A rectangle is bounded by the xaxis and the semicircle y = √36 – x2, as shown in the figure below. Write the area A of the rectangle as a function of x, and determine the domain of the area function. A = all real numbers except x = 36 all real numbers

Math
Write the exponential equation in its equivalent logarithmic form. 5^4 = 625 I know I have to change it to log or ln and something is equal to I think either 4 or 5.

Science (Asap)
Imagine you made a gallon pitcher of lemonade for your family picnic.You poured the lemonade into 12 paper cup until there wasn't a drop left.Is the volume of the lemonade in the pitcher and the lemonade in the 12 paper cups put together the same or

Physics
A springloaded toy gun is used to shoot a ball of mass m=1.5 kg straight up in the air. The spring has spring constant k=667 N/m. If the spring is compressed a distance of 25.0 centimeters from its equilibrium position and then released, the ball reaches

Chemistry
Depict the hydrogen bonding between two ammonia molecules and between one ammonia molecule and one water molecule?

Math
1/5 of Chris's wire is equal to 1/4 of Sarah's. Daniel has 3 times as much wow as Sarah. In all, their wires measure 5 feet. How long is Chris's wire in feet.

math
What is the median number of 0,3,9,15,18,22,15,9,4 The answer is 6 I set the number from lowest to highest 0,3,4,9,9,15,15,18,22 My answer is 9 but don't know why the answer is 6? The book show first add all the numbers=95 then (95+1)/2=48th then 48th=6. I

chemistry
Which of the following happens when an ionic bond is formed? A. One atom pulls an electron from another atom. B. Two atoms attain equal electronegativities. C. One atom becomes more electronegative than another atom. D. Two atoms share an electron.  Which

English
Write three sentences, each using a comma in a different way. Explain why the comma is needed in each sentence.(4 points)

Geometry Unit 7 Lesson 3 Answers
Geometry Unit 7 Lesson 3 Answers This has two parst. The first part is the practice, the second part is the quiz. Practice  8 Questions 1. Which theorem explains why the circumcenter is equidistant from the vertices of a triangle? Answer  B. Concurrency

Biology
1. In a normal distribution, the number of organisms exhibiting a phenotype variant near the lowest value is A. Less than the number exhibiting a variant near the middle value I'm too lazy so I'll just out the answers. 2. Kamar's mother must be either AB

CHEMISTRY
Which statement correctly describes the relationship between molecular structure, the strength of electrostatic forces between molecules, and the boiling point of a substance? A: The boiling point of a substance affects the strength of electrostatic

College essay
How many cheesesteaks can you fit inside the Liberty Bell? There are no right or wrong answers, but think about how you would arrive at your conclusion and explain your thought process. Any suggestions on how I can approach uncommon essay topics and think

Science
In a molecule of lithium sulfide are two atoms of lithium and one of sulfur. Which statement about lithium sulfide is correct? A. The chemical formula for lithium is LiS2 B. Both lithium and sulfur form positive ions C. The atoms in lithium sulfide are

matter interactions unit test
Which element has the same number of valence electrons as bromine (Br)? 1.krypton 2.potassium 3.selenium** 4.chlorine i think the answer is SE

Geometry (Due Today)
Can someone please help me with this quiz? 1. Identify a pair of alternate exterior angles. A) angle 3 and angle 4 B) angle 1 and angle 2 C) angle 1 and angle 6 D) angle 2 and angle 6 2. This diagram of airport runway intersections shows two parallel

geography
Drag and drop the words into the correct locations. (1 point) Put responses in the correct input to answer the question. Select a response, navigate to the desired input and insert the response. Responses can be selected and inserted using the space bar,

Economics
What does the slope of the production possibilities curve represent? A)The slope represents the level of efficiency in production. B)The slope represents the opportunity cost of producing one good instead of the other. C)If the slope is greater than one,

science
Q.1 Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions? 1. Cellular respiration needs a smaller amount of energy to activate the reaction

mathematics
If Mary inspects every sixth calculator and Nancy inspects every fifth calculator, which calculator will be the first that they both inspect?

Physics 302k
A block accelerates at 3.4 m/s^2 down a plane inclined at an angle 26.0◦ Find µk between the block and the inclined plane. The acceleration of gravity is 9.81 m/s^2 . 1. 0.0323689 2. 0.162268 3. 0.177148 4. 0.0976626 5. 0.102121 6. 0.13473 7. 0.113463

algebra
At a factory workers are draining a large vat containing water. The water is being drained at a constant rate. The table below shows the amount of water in the vat after different amounts of time. Time (minutes) 15 20 25 30 Water (liters) 620 560 500 440

Science 7B
Some plants have leaves that are poisonous to some animals. Which kind of adoption is this? Someone please help.

science
Which type of surface would best reflect light? rough and dull smooth and shiny rough and shiny smooth and dull

Language Arts
What does explicit mean?(1 point) information stated directly xxx information understood from context information that is inferred information that is somewhat vague What is an inference? (1 point) a detail the author provides in a text a conclusion based

statics
I don't understand what this question ask for. I think it want me to take 7.2*10^3 and rewrite it as 0.00072. Am i right? The momentum of an object is determined to be 7.2×103 kg⋅m/s. Express this quantity as provided or use any equivalent unit.

L.A
Which of the following helps to encourage openness, sharing, and respect for one another’s ideas during a group discussion? deadlines aevidence bdescription of roles crules for discussion

Math
1. Compared to wave A, wave B has a _____. D. longer wavelength and lower frequency 2. When drawn on a coordinate plane with the xaxis as the baseline, a wave with a crest that is closer to the baseline has a smaller _____. B. Amplitude. 3. The table

Cultural Literacy Unit test (ELA plz plz plz help)
Cultural Literacy Unit Test The Forgotten Ear of Corn An Arikara woman was once gathering corn from the field to store away for winter use. She passed from stalk to stalk, tearing off the ears and dropping them into her folded robe. When all was gathered

history
1. Select the boxes in the table to compare and contrast Warren Harding and Calvin Coolidge's policies and actions. raised tariffs probusiness agenda reduced worldwide armaments turned a profit in the White House through frugal policies 2. Which

science
What is the magnitude of a force?(1 point) A the type of force B the amount of force C the direction of the force D the motion of the force