# Anne

Popular questions and responses by Anne-
## Physics

The drawing shows a square, each side of which has a length of L = 0.25 m. Two different positive charges q1 and q2 are fixed at the corners of the square. Find the electric potential energy of a third charge q3 = -7.00 10-9 C placed at corner A and then

*asked on January 30, 2012* -
## electric circuit

Some types of fuses used to protect electric meters have resistances of several ohms. Is this objectionable (a) in ammeter circuits and (b) in voltmeter circuits? Why?

*asked on July 29, 2014* -
## Chemistry

The SI unit of length is a meter, which is defined as the length equal to 1,650,763.73 wavelengths of light emitted by a particular energy transition in krypton atoms. Calculate the frequency of the light to three significant figures.

*asked on October 31, 2012* -
## Algebra

An airplane flies 165 miles from point A in the direction 130 degrees and then travels in the direction 245 degrees for 80 miles. Approximately how far is the airplane from A?

*asked on April 24, 2015* -
## English

What are some similarities and differences between Emerson's beliefs and Thoreau's beliefs?

*asked on December 9, 2019* -
## Physics

An electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive plate (see the drawing). The plates are separated by a distance of 1.4 cm, and the electric field within the capacitor has a magnitude of

*asked on February 1, 2012* -
## english

what roles are played by the female characters you encountered in this unit? describe some of these females characters, their traits, and the roles they played within the selections you read, especially considering that all of those selections had male

*asked on December 19, 2017* -
## ENGLISH

6. The following words share a denotative meaning. Which one has a negative connotation? (1 point) confident certain decisive demanding ~ 7. Read the following Chippewa song. Identify its purpose. A loon I thought it was But it was My love's splashing oar.

*asked on September 23, 2012* -
## Physics

Help!! I would greatly appreciate help with this question. Consider a pulse of laser light aimed at the Moon that bounces back to Earth. The distance between Earth and the Moon is 3.84 * 108 m. Show that the round-trip time for the light is 2.56s.

*asked on December 4, 2014* -
## Math

a 25.00 gram sample is placed in a graduated cylinder and then the cylinder is filled to the 50.0 mL mark with benzene. the mass of benzene and solid together is 58.80 gram. assuming that the solid is insoluble in benzene and that the density of benzene is

*asked on August 23, 2010* -
## Chemistry

A solution containing a mixture of 0.0381 M potassium chromate (K2CrO4) and 0.0769 M sodium oxalate (Na2C2O4) was titrated with a solution of barium chloride (BaCl2) for the purpose of separating CrO42– and C2O42– by precipitation with the Ba2 cation.

*asked on October 15, 2015* -
## Math

In a hardware store the ratio of shovels to rakes is 3:5. If there are 10 more rakes than shovels, how many rakes are there in the hardware store? I know shovels = r-10 but don't know where to go from there?

*asked on June 30, 2014* -
## Math

If 8,x,y,z and 20 are in A.P.find x,y,z

*asked on March 19, 2016* -
## science

4. When a fan is turned on, it changes electrical energy into ______ energy. A. motion B. magnetic C. gravitational D. electromagnet 5. An experiment discovered that a particular material was a poor conductor of electricity. This material would most likely

*asked on April 16, 2015* -
## differential equation

in the theory of learning the rate at which the subject is memorized is assumed to be directly proportional to the amount left to be memorized. also the rate at which the subject is forgotten is directly proportional to the amount memorized in their time

*asked on October 26, 2014* -
## Physics

A car is being driven along a country road on a dark and rainy night at a speed of 20 m/s. The section of road is horizontal and straight. The driver sees that a tree has fallen and covered the road ahead. Panicking, the driver locks the breaks at a

*asked on November 6, 2011* -
## physics

While you sleep, your body is using energy at a rate of 77 W. How many food calories are used during an eight hour period? One food calorie is equal to 4186 joules.

*asked on November 6, 2011* -
## Physics

A 18 kg child slides down a 4.0 m-high playground slide. She starts from rest, and her speed at the bottom is 2.8 m/s. What is the change in the thermal energy of the slide and the seat of her pants?

*asked on May 14, 2011* -
## Math

A boat, whose speed in still water is 2.80m/s , must cross a 280m wide river and arrive at a point 120m upstream from where it starts. To do so, the pilot must head the boat at a 45.0 degrees upstream angle. What is the speed of the river's current?

*asked on September 12, 2009* -
## geometry

Hi can you please help me with this thank you The area of a triangle is 4 times the area of the smaller triangle formed by joining the midpoints of two sides True or false. Draw a counterexample to show if it's false.

*asked on June 18, 2020* -
## maths

proof that tanx + secx -1/tanx - secx+1 = 1+sinx/cosx

*asked on June 26, 2018* -
## Government

Pluralists believe that the dominant player in American politics is (1 point) the president. groups. the government. rich individuals. the media. All of the following are generally more true of Americans than Europeans EXCEPT (1 point) they volunteer more

*asked on October 24, 2012* -
## chemistry

If an alcohol solution has a pH of 5 would it be a primary, secondary or tertiary alcohol or a phenol?

*asked on January 18, 2011* -
## math

a cold front moves in at noon and in 5 hours, the temperature had dropped 23%. the temperature at 5:00 p.m. was 14%. let x be the temperature at noon. write an equation to find x.

*asked on November 30, 2010* -
## Science-Chemistry

1)Fill in the blanks. In a liquid, particles are _____arranged. They move about in ____ directions and slide over one another. Can I say "irregularly" & "any" as the answers? I know "random directions" is better, but can we accept "any directions"? 2) When

*asked on January 26, 2009* -
## Geometry

Find the area of the shaded region, if the rectangle has dimensions 8m and 18m and the circle is inscribed in the rectangle. I just need an example on how to solve for this. I'm pretty bad at following without examples and my book doesn't show one.

*asked on July 14, 2016* -
## algebra

a cheetah ran 300 feet in 2.92 seconds. What was the cheetahs average speed in miles per hour? Please show steps.THANKS!!

*asked on May 30, 2016* -
## PHYSICS

A 15g bullet is fired horizontally into a block of wood with a mass of 2.5 k and embedded in the block. Initially the block of wood hangs vertically and the impact causes the block o swing so that its center of mass rises 15cm. find the velocity of the

*asked on August 6, 2014* -
## Math

There are 12 girls and 9 boys in Mrs. Johnson's classroom. She said that if she randomly selects one student from her classroom the probability that it is a boy is 3/4. Which mistake did Mrs. Johnson make? A. She divided the number of girls by the total

*asked on March 20, 2013* -
## ENGLISH

Briefly describe Poe’s requirements for the short story genre.

*asked on October 2, 2012* -
## College Biology help!

Is this true? Explain. To make a 100 osmolar solution of magnesium chloride, 60g of the salt are placed in a liter of water.

*asked on September 5, 2012* -
## Chemistry

Write the reversible equation for the esterification and hydrolysis of glyceryl ethanoate

*asked on February 7, 2011* -
## math

Students noticed that the path of water from a water fountain seemed to form a parabolic arc. They set a flat surface at the level of the water spout and measured the maximum height of the water from the flat surface as 6 inches and the distance from the

*asked on November 14, 2016* -
## physics

1)An elastic material has a length of 36cm when a load of 40N is hung on it and a length of 45cm when a load of 60N is hung on it. The original length of spring is? 2)A force of 100N stretches an elastic spring to a total of 20cm. If an additional force of

*asked on April 9, 2013* -
## algebra

solve the inequality and write the solution set using interval notation. 4x+7

*asked on September 15, 2012* -
## Physics

Two point charges are fixed on the y axis: a negative point charge q1 = -26 µC at y1 = +0.21 m and a positive point charge q2 at y2 = +0.38 m. A third point charge q = +8.5 µC is fixed at the origin. The net electrostatic force exerted on the charge q by

*asked on January 24, 2012* -
## urgent math

find the equilibrium point for the demand and supply functions D(p)=79-8p and S(p)=37+6p, where p is the price, in dollars, D(p) is the number of units demanded, and S(p) is the number of units supplied.

*asked on December 8, 2011* -
## Physics

Suppose the stone is thrown at an angle of 32.0° below the horizontal from the same building (h = 49.0 m) as in the example above. If it strikes the ground 69.3 m away, find the following. (Hint: For part (a), use the equation for the x-displacement to

*asked on May 17, 2011* -
## Chemistry-atoms

A. How many protons are in one atom of fluorine - 19? B. How many neutrons are in one atom of potassium - 39? C. How many electrons are in one neutral atom of V - 51? D. What is the symbol for the element that has 78 protons? E. What is the symbol for the

*asked on April 14, 2011* -
## physics

A carton lies on a plane tilted at an angle theta 29 degrees to the horizontal, with a friction of uk .12.If the carton starts from rest 7.90 up the plane from its base, what will be the carton's speed when it reaches the bottom of the incline?

*asked on October 15, 2010* -
## trig

Prove that tan4x=(4tanx-tan^3x)/(1-6tan^2 x+tan^4 x) *note: the exponents are just numbers. there are no variables in the exponents.

*asked on March 27, 2010* -
## PHysics

a 15g bullet strikes and becomes embedded in a 1.1kg block of wood placed on a surface in front of the gun. if the coefficient of kinetic friction between the block and the surface is 0.25 and the impact drives the block a distance of 95m before it comes

*asked on December 6, 2008* -
## Chemistry - Thermodynamics

The heat capacity of a bomb calorimeter is 87.5 kJ/K (this value is for the total heat capacity including that of the water jacket around the reaction chamber). If 67.2g of CH4 (g), is combusted under such reaction conditions, what will be the increase in

*asked on December 12, 2007* -
## Calculus

I have to get the result of the serie from 1 to infinite of |sin(4n/π) +3|/ 4^n I really don't know what to do... Please I would really appreciate if anyone can help me

*asked on June 1, 2017* -
## Math

Adam cuts the cake into equal-sized pieces. Each piece has a length of 5 centimeters, a width of 5 centimeters, and a height of 3 centimeters. How many pieces of cake does Adam have? I stated 75, I used the volume equation l x w x h.

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

An electric heater the temperature of 120g of water in a thin light vessel through 10k in 2 minutes, when placed in 70g of water contained in a metal vessel of mass 0.55kg the temperature rises through 9k in the same time. Calculate from the above The heat

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

Write a compound inequality that the graph could represent. Please exlain and show if you can. Thank you...

*asked on May 30, 2016* -
## physics

The radius of a roll of paper is 7.6 cm and its moment of inertia is I = 2.9 × 10^3 kg·m2. A force of 3.2 N is exerted on the end of the roll for 1.3 s, but the paper does not tear so it begins to unroll. A constant friction torque of 0.11 m·N is

*asked on May 8, 2016* -
## Math please help.

Find the function that has the greater rate of change As x increases by 1, y increases by 3. The graph- x: -1 | 0 | 1 y: 0 | 2 | 4 A. the slopes are equal B. the graph has a greater slope C. the function rule has a greater slope**** D. none of the above

*asked on May 3, 2015* -
## math

Juan lives 2.5 miles to the park. It took him 12 minutes to ride his bike to the park. What was his average speed in miles per hour

*asked on November 29, 2014* -
## Chemistry

How is the atomic structure of a Copper differ from Germanium, Silicon and Gallium Arsenide ? Tnx :))

*asked on July 4, 2014* -
## math

One week Trey rented 4 DVDs and 2 video games for $18. The next week he rented 2 DVDs and 1 video game for $9. Find the rental costs for each video game and DVD.

*asked on January 22, 2014* -
## Physics

Suppose you walk 18.0m straight west and then 25.0 m straight north. How far are you from your starting point and what is the compass direction of a line connecting your starting point to your final position>

*asked on June 11, 2013* -
## Physics

A cannonball is fired with a velocity of 200 m/s at an angle of 25 degrees above the ground. After the total flight of 45.6 seconds, the cannonball returns to the ground. Calculate: the initial horizontal and vertical components of the velocity, the

*asked on October 23, 2012* -
## Physics

A tall strongman of mass m = 93 kg stands upon a scale while at the same time pushing on the ceiling in a small room.If the scale reads 1062 N (about 239 lb), what is the magnitude of the normal force that the ceiling exerts on the strongman?

*asked on September 21, 2012* -
## Accounting

Please prepare the following journal entries. Indicate which account should be debited and which account should be credited along with the dollar amount of the debit and credit. a) Investors invested $100,000 in exchange for 10,000 shares of common stock.

*asked on April 19, 2012* -
## Physics

A 30.0 kg box is being pulled across a carpeted floor by a horizontal force of 230 N., against a friction force of 210 N. Calculate the acceleration of the box and find the x and y components of the acceleration of the box. Align the positive direction

*asked on March 26, 2012* -
## physics

A balloon rubbed against denim gains a charge of -9 µC. What is the electric force between the balloon and the denim when the two are separated by a distance of 5 cm.

*asked on March 1, 2012* -
## Chemistry

How to prepare 1L of 96% v/v ethanol from 99% v/v ethanol? Can you show me the calculation steps?Thanks.

*asked on February 15, 2012* -
## 11th grade

4. The use of technology such as telephones and computers means that money exchanges and other financial transactions can be a. based on the U.S. dollar all over the world. b. converted to prices in any currency. c. made instantaneously. d.sensitive to

*asked on December 21, 2010* -
## Physics

As you approach the I-90 exit in your uncle's little red sports car convertible, you happen to notice a cat crossing the road. Not that you have any particular love of cats (especially this one, whose snooty disposition seems to beckon for a game of

*asked on November 1, 2010* -
## geometry

prove the following statements using a coordinate proof. the diagonals of a rectangle bisect each other.

*asked on February 2, 2008* -
## General Chem - Electrochemistry

Give the cell diagram notation of the electrochemical cell that could be used to determine experimentally the dissociation constant (Kw) of water. The standard reduction potential for O2 + H20 + 4 e- ----> 4OH- is 0.40 V For other possible half-reactions,

*asked on December 12, 2007* -
## science

True or False: Drag and tailwind are examples of a contact force.

*asked on December 16, 2019* -
## Math

Find the volume of a spherical cone in a sphere of radius 17 cm. if the radius of its zone is 8 cm.

*asked on May 22, 2018* -
## Biology

A farmer wants to propagate a good variety of a crop in a way which maintained all its desirable traits. Which of the following methods should be used? A. Self Pollination B. Vegetative propagation C. Growing seeds produced from this variety D.

*asked on September 30, 2017* -
## Biology

A farmer grew only one type of onion. All of the onion plants died from the same disease. What can be said of this onion plant population. A. Only few plants were resistant to the disease B. All of the onion plants were resistant to the disease. C. The

*asked on September 30, 2017* -
## Chem

How would the pressure of a gas change if suddenly the intermolecular forces were repulsive rather than attractive?

*asked on December 6, 2016* -
## Chem

suggest an explanation for the ideal nature of helium compared to the other gases

*asked on December 6, 2016* -
## Math

A total of 45 412 runners participated in the Vancouver Sun Run. Of these runners, 0.85% completed the run in under 40 min. How many runners completed in under 40 mins? In fact, 0.13% of the runners completed the run in less than 34 min. How many runners

*asked on October 21, 2016* -
## Math Limits

lim(as p-->4) of (p^3 - 64) / (4-p) My work: p^3 - 64 = (p-4)(p^2 + 4p + 16) 4 - p = -(p-4) ((p-4)(p^2 + 4p + 16)) / -(p-4) p-4 cancels out -(p^2 + 4p + 16) -((4)^2 + 4(4) + 16) -(16 + 16 + 16) - 48 Is this right?

*asked on October 17, 2016* -
## Math

Hello, I'm supposed to do the following questions for the equation y=cos(pi/3)x for intervals [0,6] a) For what values of x does the instantaneous rate of change appear to equal 0? b) For what value(s) of x does the instantaneous rate of change appear to

*asked on August 24, 2016* -
## algebra

Question 8: What is the value of c such that: x2 + 14x + c, is a perfect-square trinomial? a. 7 b. 98 c. 196 d. 49

*asked on June 1, 2016* -
## algebra 1

What is the simplified form of the expression? x^8*2y^10*5x^5

*asked on June 1, 2016* -
## Algebra

A taco stand sells tacos for $3.35 easch. The stands expenses for the day are $210. Define our variables and write an inequality to represent the amount of tacos they need to sell per day to make a profit, and then solve the inequality. Provide your

*asked on May 30, 2016* -
## Algebra

Your friend claims that she has a bag of 30 coins containing nickels, dimes, and quarters. The total value of the 30 coins is $3. There are twice as many nickels as there are dimes. Is your friend correct? Explain your reasoning

*asked on September 6, 2015* -
## physics

Two workers pull horizontally on a heavy box, but one pulls twice as hard as the other. The larger pull is directed at 25.0 degrees west of north, and the resultant of these two pulls is 350.0 N directly northward. Use vector components to find the

*asked on August 18, 2015* -
## physics

A capacitor is rolled from two strips of aluminum separated by two strips of paraffin-coated paper. Each strip is 5.40cm wide. The foil is 7.00μm thick, and the paper is 50.0μm thick. What length, in cm, should the strips be if a capacitance of 24.0nF is

*asked on January 30, 2015* -
## Statistics

The marks of 100 students in an examination are normally distributed with mean of 25 marks and a standard deviation of 10 marks. (a) Given that the pass mark is 20, estimate the number of students who passed the examination. (b) If 5.59% of the students

*asked on October 23, 2014* -
## math

your team has two x·sq-tiles, three x-tiles, and one unit tile on his desk and another person has one x·sq- tile, five x-tiles, and eight unit tiles on her desk. You decide to put all of the tiles together on one desk. What is the name for this new group

*asked on September 17, 2014* -
## Math

Let n = c x p, where p is a prime number, and c is a composite number less than p. The number c has three unique prime factors. How many unique prime factor does n^2 have?

*asked on July 2, 2014* -
## physics

Suppose that the range of output frequencies is from 47.4 Hz to 14.8 kHz for a pipe organ. Take 343 m/s for the speed of sound. (a) What is the length (in units of m) of the longest pipe open at both ends and producing sound at its fundamental frequency?

*asked on November 22, 2013* -
## Science

Astrologers relate the location of stars and planets to events in human lives. Many years ago, people classified astrology as a science. Why do modern scientists consider astrology to be a pseudoscience A. Astrology does not involve the use of telescopes.

*asked on October 20, 2013* -
## Stats/math

The deciles of any distribution are the 10th, 20th,...90th percentiles. The first and last deciles are the 10th and 90th percentiles, respectively. What are the first and last deciles of the standard Normal distribution? HOw would i solve this? thank you

*asked on September 14, 2013* -
## Maths A Year 12

Four years ago, an art collector bought a painting for $32 500. He knows that this painting appreciates at 15% a year. What is this painting worth now, to the nearest $100?

*asked on June 9, 2013* -
## Maths A

$20 000 is invested in a term deposit at 5.4% p.a. with monthly rests. What will be the value of this investment after 3 years?

*asked on June 9, 2013* -
## Math

Ray wanted to put his tomato plants in rows with the same numbers of plants in each row. He knew that if he planted 5,6, or 7 rows of tomatoes, he would have at least one plant left over. However, his plants could be placed evenly in 8 rows. Which of the

*asked on March 30, 2013* -
## Math

hailey wants to rake her entire yard. This morning she raked 1/3 of the yard, and this afternoon she raked another 3/5 of the yard. What fraction of her yard still needs to be raked?

*asked on March 23, 2013* -
## math

the perimeter of a rectangle is 40 feet and its area is 96 square feet. find the length and width?

*asked on March 6, 2013* -
## Government

The passage of the Civil War amendments—the Thirteenth, Fourteenth, and Fifteenth Amendments—did not end discrimination of African Americans. However, the Supreme Court has relied on these amendments in deciding civil rights cases such as the case of

*asked on January 5, 2013* -
## physics

A certain car is capable of accelerating at a uniform rate of 0.93 m/s2. What is the magnitude of the car’s displacement as it accelerates uniformly from a speed of 86 km/h to one of 98 km/h? Answer in units of m

*asked on November 11, 2012* -
## Physics

Block 1 is up an incline and is attacthed to block 2 by a rope, with m2 = 5.0 kg and è = 33°.If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at

*asked on October 20, 2012* -
## Biology

Scientists observe a newly established population of sexually reproducing plants growing on the shore of a small island. An observable trait of the plant has two possible phenotypes. It is determined by a single gene, with the dominant allele having

*asked on October 3, 2012* -
## Math

A rectangular sandbox has a length of 60 inches, a width of 40 inches, and a depth of 6 inches. What is the volume in cubic inches?

*asked on August 2, 2012* -
## Chemistry

A 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2O4=128.09 g/mol]

*asked on April 16, 2012* -
## Chemistry

How would you find the pH of a solution prepared by mixing 50 mL of 0.125 M KOH with o.050 L of 0.125 M HCl?

*asked on April 16, 2012* -
## Physics 2

The average intensity of light emerging from a polarizing sheet is 0.807 W/m2, and the average intensity of the horizontally polarized light incident on the sheet is 0.972 W/m2. Determine the angle that the transmission axis of the polarizing sheet makes

*asked on April 5, 2012* -
## math

The average of two numbers is 34. The first number is three times the second number. what are the two numbers?

*asked on April 1, 2012* -
## Science-Chemistry

In the following test for Sulfated Ash, ammonium carbonate solution was added. What is the purpose of adding ammonium carbonate solution? Heat a silica crucible to redness for 30 minutes, allow to cool in a desiccator and weigh. Place 1g of the substance

*asked on March 18, 2012* -
## math

Solve variation problem if m varies jointly as z and p, and m=10 when z=2 and p=7.5, find m when z=5 and p=7

*asked on February 24, 2012*