# Anon

Questions and responses by Anon, page 11-
## trigonometry

This is an outline that i have to use to find the solution of the question. It involves logarithms and half-angle formulas.I have worked though it but got stuck on some parts. I'd like if you look over my work. solve the triangle for which given parts are

*asked on February 28, 2011* -
## Trigonometry /Logarithms (brace yourself)

This is an outline that i have to use to find the solution of the question. It involves logarithms and half-angle formulas.I have worked though it but got stuck on some parts. I'd like if you look over my work. solve the triangle for which given parts are

*asked on February 28, 2011* -
## sciencce

Mrs. Scheib was riding her bike and leaves home and rides due east for a distance of 45 km. she returns home on the same bike path. if the entire bike path takes 4 hrs what is her average speed? Is it 11.25?

*asked on February 17, 2011* -
## Chemistry

Determine the pressure in a 125-L tank containing 56.2 kg of oxygen gas at 25 °C. So, PV=nRT I convert 25 °C to 298.15 K Do I have to convert anything else? What else do I do?

*asked on January 19, 2011* -
## Physics

At t = 0, a 785 g mass at rest on the end of a horizontal spring (k = 125 N/m) is struck by a hammer, which gives the mass an initial speed of 2.70 m/s. (a) Determine the period of the motion. T= .4979201367s Determine the frequency of the motion. f=

*asked on December 7, 2010* -
## Chemistry

The element niobium has bcc packing with a body-centered cubic unit cell. The volume of the unit cell is 3.59 x 10-26 L. Calculate the density (g/cm3) of the element

*asked on May 12, 2010* -
## chemistry

6.Answer the following questions about BaC2O4 and its hydrate: A. calculate the mass percent of carbon in the hydrated form of the solid that has the fromula BaC2O4 * 3H2O

*asked on February 29, 2008* -
## Spanish

What does it mean to conjugate a verb? This is for Spanish. Also, I have looked up what it means, and I must’ve missed this in the lesson too. What does this mean to do? I am just not understanding. Thank you!!

*asked on October 18, 2018* -
## Math

Determine vector, parametric and, if possible, symmetric equations for the line through Q(2, -1, 3) and the mid-point of the line segment from L(3, -2, 5) to M(1, 4, -7).

*asked on October 8, 2018* -
## physics

Orson rides his power boat up and down a canal. The water in the canal flows at 10 km/hr. Orson takes 5 hours longer to travel 360 km against the current than he does to travel 360 km with the current. What is the speed of Orson's boat in still water?

*asked on July 13, 2018* -
## Physics

Getting my head twisted around by the wording of these two questions, any help would be appreciated. My answers/ideas are below each question. 1) Brieﬂy explain whether there would there be more or fewer conﬁgurations available for the gas if the

*asked on May 6, 2018* -
## math

The square root of 76 is between what two numbers?

*asked on March 5, 2018* -
## Physics

A 6.50 horsepower self propelled lawn mower is able to travel at 0.56 m/s, starting from rest, in 0.050 s. If the lawn mower has a mass of 48.0 kg, what distance does the lawnmower travel in that time? (1 hp = 746 W)

*asked on February 21, 2018* -
## Induced current.

(c) Find an expression for the magnitude of the induced current in the loop at time t, in terms of the symbols above and appropriate constants. What is the maximum magnitude of the induced current in mA and how many times does this occur per second?

*asked on February 3, 2018* -
## Capacitor

I have a question regarding a pair of conducting plates. My question states: "if this device operates as a capacitor, how is it able to store electrostatic potential energy?" is the answer: The charge separation between the plates causes an internal

*asked on January 9, 2018* -
## English

I have to write a 3 paragraph wisdom anecdote; a short story that teaches a lesson. I needed some help coming up with ideas for my anecdote. I have read examples of anecdotes, but I can't make up any story that teaches a lesson. Any help?? Story or moral

*asked on December 4, 2017* -
## Math

From a pool of six juniors and eight seniors three co captains will be chosen for the football team. How many different combinations are possible if one junior and two seniors are chosen?

*asked on April 25, 2017* -
## Chemistry

what volume of oxygen is needed to react to complete reaction and to form 5cm of so3?

*asked on March 11, 2017* -
## Chemistry

When a person got onto an airplane, she brought with her a half-full 1.0000 L aluminum water bottle that was closed inside the airport at standard pressure and a temperature of 26.000 C. After the plane takes off and climbs to 36,000. feet, the cabin

*asked on March 6, 2017* -
## Algebra

1. The perimeter of a rectangle is 78 cm. The length is 3 greater than twice its width. Find the dimensions.

*asked on February 21, 2017* -
## chemistry

Confused on how to find the reactants in these two compounds Ba(OH)2 (aq) + I2Zn (aq) -> ?? Additionally, I am not really sure how to find the ionic equation for this.

*asked on February 21, 2017* -
## Calc

Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = xy i + yz j + zx k S is the part of the

*asked on November 23, 2016* -
## Calc

Write the equations in cylindrical coordinates. (a) 3z = 2x^2 + 2y^2 (b) 7x^2 + 7y^2 = 4y

*asked on October 25, 2016* -
## math

Question: There is a $200 entrance fee for each band plus a $25 entrance fee for each drill team. The competition has a total of 32 bands and 25 drill teams. Write and evaluate an expression for the total amount of money collected from the entrance fees. -

*asked on October 2, 2015* -
## science!

i want you to check my answers for the questions and i might need help on constructing the graph that i need to do for problem 7. variables and graphing assessment practice some students wanted to investigate the effect of light on the growth of spanish

*asked on September 7, 2015* -
## Algebra

Use the order of operations to simplify SHOW ALL WORK 13+3*6/9-7 18-6/3+12*3 the "/" sign is a division symbol

*asked on May 28, 2015* -
## Algebra

Jed decided he needs to start exercising more. On Monday, he runs 2 miles. on Tuesday, he runs 4 miles. On Wedsnesday he runs six miles. He continues with this pattern each day for five days, Monday through Friday. How many total miles did he run in the

*asked on May 28, 2015* -
## Science

which of the following would have the greatest force? •an object with low mass accelerating slowly •an object with low mass accelerating quickly •an object with high mass accelerating quickly •an object with high mass accelerating slowly (and yes i

*asked on April 17, 2015* -
## chemistry

What volume of oxygen gas can be collected at 0.565 atm pressure and 48.0◦C when 42.9 g of KClO3 decompose by heating, according to the following equation? 2 KClO3(s) ∆−−−−→2KCl(s) + 3O2(g) MnO2

*asked on February 25, 2015* -
## Math

You have an ear infection and are told to take a 200 mg tablet of ampicillin (a common antibiotic) four times a day (every six hours). It is known that at the end of six hours, about 5% of the drug is still in the body. What quantity of the drug is in the

*asked on December 12, 2014* -
## Science/Biology

Please check my answers: 1. Which of the following correctly states the relationship between monkeys and humans? A. Humans and monkeys evolved from apes. B. Humans evolved from monkeys. C. Humans and monkeys evolved from the same ancestor, which is now

*asked on April 4, 2014* -
## science

A hydrogen atom has one proton, two neutrons, and no electrons. Is this atom an ion?

*asked on March 9, 2014* -
## Math :-)

Explain why knowing the height is needed when finding the perimeter of a right triangle.

*asked on February 9, 2014* -
## Physics

TURNTABLE SOLUTIONS A gyroscope consists of a uniform disc of mass radius M= 1 kg and radius R= 0.3 m . The disc spins with an angular speed ω= 400 rad⋅s-1 as shown in the figure below. The gyroscope precesses, with its axle at an angle 30∘ below the

*asked on November 24, 2013* -
## ET3034TUx Solar Energy

The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the Boltzmann's constant, and

*asked on October 16, 2013* -
## Physics

A person is standing on the edge of a cliff of height h= 24 m. She throws a stone of mass m=0.2 kg vertically down with speed v0= 10 m/s (stone 1) and another stone of the same mass vertically up at the same speed (stone 2). The gravitational acceleration

*asked on October 6, 2013* -
## Chemistry

Calculate the magnitude of the cohesive energy of potassium iodide (KI). The ionic radii of K+ and I−, are 152 pm and 206 pm, respectively. Assume the Born exponent n is 10. Assume a Madelung constant of 1.7. Please report your answer in kJ/mol or how to

*asked on September 28, 2013* -
## algebra

a number cube is rolled 2 times in a row. what is the probability of rolling a number greater than 2 both times?

*asked on May 7, 2013* -
## English-Grammar

After the war, American shipping became vulnerable to attacks by pirates. simple sentence (my answer) compound sentence complex sentence compound complex sentence

*asked on December 11, 2012* -
## Psychology

The impact of drug x on fertility rates in young women A.Potentially rendering young women unable to have children B.Potential birth defects if the women should become pregnant during the study C.Exposing young women to an untested drug D.There is no

*asked on October 16, 2012* -
## Physics

A 5000 kg cart carrying a vertical rocket launcher moves to the right at a constant speed of 27.0 m/s along a horizontal track. It launches a 54.8 kg- rocket vertically upward with an initial speed of 33.1 m/s relative to the cart. A) where will the rocket

*asked on June 15, 2012* -
## Biology

The release of eggs and sperm near each other into the water occurs during A spawning. B development. C growth. D all of the above. Is it A?

*asked on June 15, 2012* -
## physics

While John is traveling along an interstate highway, he notices a 166 mi marker as he passes through town. Later John passes a 120 mi marker. What is the distance between town and John’s current location? Answer in units of mi

*asked on January 16, 2012* -
## physics

A sound wave, traveling at 348m/s, is emitted by the foghorn of a tugboat. An echo is heard 1.99 s later. How far away is the reflecting object? Answer in units of m

*asked on January 16, 2012* -
## Anime

How would you differentiate anime from American animated series/films? Is it in the story-line, art, etc.? Do they influence one another? Also, how has anime evolved over time, and what exactly is its purpose?

*asked on November 2, 2011* -
## Opinion

Generally speaking, what can we learn from a society's villains faced by its heroes that we can't learn from its heroes? Is it easier for you (personally) to understand what a villain represents than a hero? On a similar note, do you think it's easier to

*asked on October 28, 2011* -
## Calculus (double check my anser please)

Evaluate integral e^3x cosh 2x dx. A.1/2 e^5x + 1/2 e^x + C B.1/10 e^5x + 1/2e^x + C

*asked on March 13, 2011* -
## Calculus (please check my answer)

Find the Avrage value of the function i=15(1-e to the power of -1/2 t) from t=0 and t=4? A.7.5 sqrt 1+4e^-2 -e^-4

*asked on March 13, 2011* -
## Calculus (double check )

Find the centroid of the area bonded by the parabola y =4-x^2 and the x-axis? A.(0,1.6)

*asked on March 13, 2011* -
## Earth Science

What are the primary heat absorbing gases in the atmosphere? What wavelength of radiation do they absorb?

*asked on November 4, 2010* -
## science

what is produced when copper sulphate solution is mixed with ammonia solution? Either copper(II) hydroxide or copper(II) ammine sulfate or both depending upon the strength and the amount of ammonia added. The first is Cu(OH)2, the second is Cu(NH3)4SO4

*asked on January 18, 2007* -
## US History

How did the British victory in the French and Indian War lead to the American Revolution? Loss of land by the colonists to the French led to resentment in the colonies. The complex terms of the Treaty of Versailles led colonists to believe they were

*asked on October 30, 2019* -
## Trigonometry

What is the value of tan (Arc cos 15 seventeenths)? 1. 8/15 2. 8/17 3. 15/8 4. 17/8 Can you guys explain what the Arc means?

*asked on June 10, 2018* -
## Math

PLEASE HELP PLEASE Does the series diverge or converge? How do you know? 3+6+12+24+...

*asked on April 1, 2018* -
## Resistance, Circuits

A PRT consists of 9.0 m of wire of diameter 8.0×10−2 mm. The voltmeter reads 0 V when l1 =0 .44m. If the standard resistor, R, has a resistance of 224Ω, what is the resistivity of platinum?

*asked on January 6, 2018* -
## Math

I spent $24 on a present for my sister. This was three fourths of all the money I had in my wallet. How much money did I have before I bought the present? I need help

*asked on December 15, 2017* -
## Calculus

The acceleration function (in m/s2) and the initial velocity v(0) are given for a particle moving along a line. a(t) = 2t + 2, v(0) = −3, 0 ≤ t ≤ 5 (a) Find the velocity at time t. v(t) = t^2+2t-3 m/s (b) Find the distance traveled during

*asked on December 9, 2017* -
## Physics

A force is applied to a 22.5 kg object causing it to move at a constant velocity of 4.2 m/s with a coefficient of friction of 0.44. Suddenly, the applied force is removed, causing friction to be the only force acting on the object. How long will it take

*asked on November 14, 2017* -
## algebra 2

Determine whether y varies directly with x. If so, find the constant of variation and write the equation. X | Y ------ 1 | -2 3 | -6 5 | -10 i think it's A ?? A. yes; k=2 and y=2x B. no C. yes; k= -2 and y= -2x D. yes; k= -1/2 and y= -1/2x

*asked on October 6, 2017* -
## Math

the ratio of A to B is 3:8 and the ratio of B to C is 1:6 what is the ratio of A to C

*asked on March 6, 2017* -
## Math - Calculus

Find the area of the surface of revolution generated by revolving the curve y = 3 sqrt (x), 0

*asked on December 8, 2016* -
## Physics

Block A, with a mass of 10 kg, rests on a 36.9° incline. It is attached to a string that is parallel to the incline and passes over a massless, frictionless pulley at the top. Block B, also with a mass of 10 kg, is attached to the dangling end of the

*asked on November 27, 2016* -
## Math

Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = x i + y j + z4 k S is the part of the

*asked on November 23, 2016* -
## Calc 3

Evaluate the surface integral S F · dS for the given vector field F and the oriented surface S. In other words, find the flux of F across S. For closed surfaces, use the positive (outward) orientation. F(x, y, z) = x i + y j + z4 k S is the part of the

*asked on November 23, 2016* -
## Math

Find center of mass of the lamina that occupies the region D and has the given density function ρ. D is the triangular region with vertices (0, 0), (2, 1), (0, 3); ρ(x, y) = 5(x + y) mass=30 Find center of mass

*asked on October 19, 2016* -
## Calc

Use a triple integral to find the volume of the given solid. The tetrahedron enclosed by the coordinate planes and the plane 8x + y + z = 4

*asked on October 18, 2016* -
## Calc

Evaluate the triple integral. SSS(triple integral T 3x^2 dV where T is the solid tetrahedron with vertices (0, 0, 0), (1, 0, 0), (0, 1, 0), and (0, 0, 1)

*asked on October 18, 2016* -
## Calculus

Find the tangential and normal components of the acceleration vector. r(t) = t i + t2 j + 4t k aT= aN=

*asked on September 12, 2016* -
## calculus

A region is bounded by y=2x and y=4sqrt(x). Find the volume when rotated along 1)y=-1 2)the y axis

*asked on July 18, 2016* -
## Algebra

The quadratic function f is negative only on the open interval (−2, 1 4 ) and its graph passes through the point (−1, −5). Determine the coefficients of f and sketch its graph.

*asked on January 25, 2016* -
## Physics

Two springs are set up on a table. The longer spring has a spring constant of 221 N/m and an initial length of 44.0cm. The shorter spring has a spring constant of 725 N/m and an initial length of 22.0cm. How far above the table is an 9.30kg ball when it

*asked on December 17, 2015* -
## Algebra

Solve for x and check answer: Nx=4j-5x X=(4j)/(5+n) How do I do the check?

*asked on October 22, 2015* -
## algebra

simplify. 3 - 2(4 - 7) ÷ 9 i don't know what to do after i subtract 4 and 7 which is -3 then multiply 2 which is -6 then i don't know what to do afterwards, i know pemdas so -6 divided by 9 cannot be so please help on that. the integers from -3 to +3 can

*asked on August 27, 2015* -
## math

Let ABCD be a cyclic quadrilateral. Let P be the intersection of \overline{AD} and \overline{BC}, and let Q be the intersection of \overline{AB} and \overline{CD}. Prove that the angle bisectors of \angle DPC and \angle AQD are perpendicular.

*asked on July 2, 2014* -
## electricity and magnets

A thick metal slab carries a current I. A uniform magnetic field B points perpendicular to the slab (and into the page). If point P on the slab is at a higher potential than point , what can we say about the charge carriers that produce the current in the

*asked on December 17, 2013* -
## Physics

A conical pendulum is constructed from a rope of length l and negligible mass, which is suspended from a fixed pivot attached to the ceiling. A small ball of mass m is attached to the lower end of the rope. The ball moves in a circle with constant speed in

*asked on October 10, 2013* -
## Chemistry

Calculate the magnitude of the cohesive energy of potassium iodide (KI). The ionic radii of K+ and I−, are 152 pm and 206 pm, respectively. Assume the Born exponent n is 10. Assume a Madelung constant of 1.7. Please report your answer in kJ/mol or how to

*asked on September 28, 2013* -
## math

Which situation can be modeled by tossing a coin three times? a. choosing which one of sixteen teams will win a tournament c. selecting a desk from thirty-six in a classroom b. deciding which English teacher of eight will win a trip to London d. picking

*asked on August 17, 2013* -
## Chemistry

a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of

*asked on June 2, 2013* -
## Science

How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?

*asked on March 4, 2013* -
## physics

A light bulb is placed 17.1 cm in front of a concave mirror. When the concave mirror is replaced by a plane mirror in the same location, the bulb's image moves 6.60 cm closer to the mirror. Calculate the focal length of the concave mirror.

*asked on January 31, 2013* -
## Chemistry

How do you prepare 600.0mL of 0.48M Al(NO3)3*9H2O? Is this correct? 1. Measure out 71g of solution 2. Put approx. 300.0mL of water into container 3. Add the 71g of solution to the water and mix 4. Add more water until 600.0mL of solution is obtained 5. Mix

*asked on November 24, 2012* -
## Math

Letter 'C' on this question confuses me, please help! Holly has joined a video rental club. After paying $6 a year to join, she then has to pay only $1.25 for each new release she rents. a. Write an equation in intercept form to represent Holly’s cost

*asked on November 13, 2012* -
## accounting

The following information was made available from the income statement and balance sheet of Lauren Company. Item 12/31/10 12/31/09 Accounts Receivable $53,400 58,600 Accounts Payable 35,600 32,700 Merchandise Inventory 85,000 79,000 Sales (2010) 243,000

*asked on July 25, 2012* -
## science

Which of the following is TRUE? A It was recently discovered that the pituitary gland does not actually do anything. B The hypothalamus is responsible for controlling the activity of the pituitary gland. C The pituitary gland controls the hypothalamus,

*asked on June 27, 2012* -
## german

1. Fill in the correct comparative form: Fußball ist ______ Golf. (interessant) A mehr interessanter als B interessanter als C mehr interessant als D interessant als is it C? 3. Fill in the correct comparative form: Der Film ist ______ das Buch.

*asked on June 24, 2012* -
## Business

The contrarian approach to investing is best illustrated by A. staying out of the market no matter what experts are saying. B. always buying when others are selling. C. investing in mutual funds, contradicting the idea that investing in individual stocks

*asked on May 24, 2012* -
## Precalculus

The figure below shows a conchoid of Nicomedes. The top part is formed by a ray from the origin that rotates through an angle t° with the x-axis. The ray intersects the fixed line y = 2 at point A. From A you measure out 7 more units to point P on the

*asked on January 20, 2012* -
## Precalculus

I don't even how to go about this.... Mars is in an elliptical orbit with the Sun at one focus, as shown in the figure. At its aphelion, Mars is 156 million miles from the Sun. At its perihelion, Mars in only 128 million miles from the Sun. How long is the

*asked on January 20, 2012* -
## physics

While John is traveling along an interstate highway, he notices a 166 mi marker as he passes through town. Later John passes a 120 mi marker. What is John’s current position?

*asked on January 16, 2012* -
## pre calculus

Use the remainder theorem to find the remainder when f(x) is divided by x -2. Then use the factor theorem to determine whether x -2 is a factor of f(x) f(x) = 2x^5 + 6x^4 - x^2 - 7x - 12

*asked on December 10, 2011* -
## Physics

The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 4.0 1011 m. Find the period of the orbit IN SECONDS!!!???

*asked on October 22, 2011* -
## College Physics

In Chapter 3 we learned that the force of air drag on an object moving rapidly through the air is proportional to v2, where v is the speed of the ball relative to the air. The same relation applies to the force of the wind on the blades of a wind turbine

*asked on October 18, 2011* -
## Chem

After filling a flask with water and allowing 15 minutes in a water bath, a student finds that the water level has dropped. How is this possible?

*asked on September 27, 2011* -
## Physics

A hockey puck slides with an initial speed of 43.2 m/s on a large frozen lake. If the coefficient of kinetic friction between the puck and the ice is 0.036, what is the speed of the puck after 10.4 s?

*asked on September 11, 2011* -
## Algebra II

I first want to make it clear that I have only taken Geometry, Algebra I, and pre-Algebra. That seemed to clear things up last time. Question: Matt bought a car at the cost of 25,000 dollars. This car's value goes down 15% every year. 1. What is the decay

*asked on March 17, 2011* -
## Calculus

1.evaluate (integral sign)x cos 3x dx A.1/6 x^2 sin 3x + C B.1/3 x sin 3x -1/2 sin 3x +C C.1/3 x sin 3x +1/9 cos 3x +C

*asked on March 12, 2011* -
## Trigonometry

Write equivalent equations in the form of inverse functions for a.)x=y+cos è b.)cosy=x^2 (can you show how you would solve) a.) x= y+ cos è cos è = x-y theta = cos^-1(x-y) b.) cosy=x^2 cos(y) = x^2 y = Cos^-1(x^2)

*asked on March 3, 2011* -
## Physics

when a .187 kg mass is attached to a vertical spring it causes the spring to stretch distance d. if the mass is now displaced slightly from equilibrium, it is found to make 223 oscillations in 157s. Find the stretch distance d.

*asked on February 28, 2011* -
## trigonometry

an example problem showed the following log tan A/2 = 9.54435 - 10 A= 38 deg 36' 12" Now i want to do the same. log tan A/2 = 9.85551 - 10 A= ?? I don't know how to convert tan into degrees can you help me.

*asked on February 27, 2011*