# Bobby

Most popular questions and responses by Bobby-
## Language

In "Two Kinds", what changes the daughters attitude about becoming a prodigy? A. She sees her Brother disappointment after she fails the test . B. She realizes that she will have to learn to play the piano . C. She realizes that Waverley has a natural

*asked on August 26, 2017* -
## English

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

*asked on February 29, 2016* -
## Physics

3. A person exerts a force of 55 N on the end of a door 74 cm wide. What is the magnitude of the torque if the force is exerted a)perpendicular to the door b)at a 45 degree angle to the door, c) at a 125 degree angle to the door?

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

You throw a ball toward a wall with a speed of 25m/s and at an angleof 40 degree above the horizontal. The wall is 22m from the realease point of the ball. a) How far above the release point does the ball hit the wall? b) What are the horizontal and

*asked on October 25, 2006* -
## Organic Chemsitry

By knowing the natural abundance of minor isotopes, it's possible to calculate the relative heights of M+ and M+1 peaks. If natural abundances are 12C - 98.9% and 13C - 1.10%, what are the relative heights, to the nearest 0.1%, of the M+ and M+1 peaks in

*asked on January 27, 2012* -
## Chemistry

In a saturated solution of silver phosphate, the concentration of silver ion is 4.5 x 10^-4 mol/L. The Ksp of silver phosphate would be which of the following? 6.8 10-8 1.0 10-11 1.4 10-14 none of the above 1.5 10-15 In a saturated solution

*asked on March 12, 2010* -
## Physics

An aluminum bar has the desired length when at 10 degrees Celsius. How much stress is required to keep it at this length if the temperature increases to 33 degrees Celsius?

*asked on November 14, 2012* -
## physics

Mayan kings and many school sports teams are named for the puma, cougar, or mountain lion Felis concolor, the best jumper among animals. It can jump to a height of 12.2 ft when leaving the ground at an angle of 44.2°. With what speed, in SI units, does it

*asked on February 15, 2016* -
## physics please help!!

A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A

*asked on March 24, 2014* -
## Chemistry

Silicon carbide, commonly known as carborundum, is a very hard and abrasive substance. The compound is prepared by heating silicon dioxide in the presence of graphitic carbon: SiO2(s) + 2C(s) --> SiC(s) + CO2(g) How many grams of silicon carbide can be

*asked on September 30, 2014* -
## Chemistry

Does anyone know why Glucose is soluble in water but is not soluble in Hexane?

*asked on August 9, 2010* -
## precalculus

Let $R$ be the set of primitive $42^{\text{nd}}$ roots of unity, and let $S$ be the set of primitive $70^{\text{th}}$ roots of unity. How many elements do $R$ and $S$ have in common?

*asked on February 15, 2017* -
## chemistry

Assuming that 1 gram of aspirin dissolves in 450 ml of water at 10°C, how much aspirin would be lost in 40 ml of water added to the reaction mixture if the mixture were at 10 °C during filtration?

*asked on April 20, 2010* -
## Language

In "Two Kinds", why does the daughter mention her mothers dead daughters when her mother insists that she practiced the piano after the recital? A. She wants to hurt in the defy her mother B. She feels bad that she is an only child . C. She wants her

*asked on August 26, 2017* -
## Physics

A diver stands on the end of a diving board as shown in the figure on the right. The mass of the diver is 58 kg and the mass of the uniform diving board is 35 kg. Calculate the magnitudes and directions of the forces exerted on the board at the points A

*asked on March 24, 2014* -
## Writing English

PLEASE HELP Does my work look correct? Underline the adverb clause in each sentence below, and then answer the questions that follow. 12. When rain falls, my socks get wet. I underlined "my socks get wet" as the adverb clause a. What word (or words) does

*asked on February 16, 2019* -
## Language

After the daughter in "Two Kinds" has grown up her mother and for us to give her a piano for her birthday. This action is that her mother. A. Still believes that her daughter can become a great pianist . B. Want to remind her daughter that she disappointed

*asked on August 26, 2017* -
## Calculus

Emily and Clare kick a soccer ball at the same time. Emily kicks it with a force of 120 N at an angle of 60 degrees and Clare kicks it with a force of 200 N at an angle of 120 degrees. The angles are measured from a line between the centres of the two

*asked on May 2, 2010* -
## phyics

A person is standing on a level floor. His head, upper torso, arms, and hands together weigh 470 N and have a center of gravity that is 1.13 m above the floor. His upper legs weigh 108 N and have a center of gravity that is 0.755 m above the floor.

*asked on November 1, 2013* -
## Social studies

Which statement accurately describes the reasons for establishing Plymouth and Jamestown

*asked on February 26, 2019* -
## Physics

You are pulling your little sister on her sled across an icy (frictionless) surface. When you exert a constant horizontal force of 120 N, the sled has an acceleration of 1.7 m/s2 If the sled has a mass of 8.4 kg, what is the mass of your little sister?

*asked on October 13, 2014* -
## Chemistry

The protective action of ozone in the atmosphere comes through ozone's absorption of UV radiation in the 230 to 290 nm wavelength range. What is the energy, in kilojoules per mole, associated with radiation in the wavelength range?

*asked on October 22, 2013* -
## precalculus, complex numbers

Let $\omega$ be a complex number such that $\omega^7 = 1$ and $\omega \neq 1$. Let $\alpha = \omega + \omega^2 + \omega^4$ and $\beta = \omega^3 + \omega^5 + \omega^6$. Then $\alpha$ and $\beta$ are roots of the quadratic \[x^2 + px + q = 0\] for some

*asked on February 22, 2017* -
## algebra

A small painting has an area of 400 c m 2 . The length is 4 more than 2 times the width. Find the dimensions of the painting. Solve by completing the square. Round answers to the nearest tenth of a centimeter.

*asked on May 20, 2014* -
## Math

A pencil costs $3.50 and a pen costs $6.70. Jessica bought m pens. She also bought 4 fewer pencils than pens. Write an algebraic expression for the total amount she spent. The answer supposed to be 6.70m + 3.5 (m-4). I got confused of what to do

*asked on February 3, 2017* -
## Calculus

A cruise ship's captain sets the ship's velocity to be 26 knots at a heading of 080 degrees. The current is flowing toward a bearing of 153 degrees at a speed of 8 knots. What is the ground velocity of the cruise ship?

*asked on May 2, 2010* -
## social studies

1, In theory, feudalism was based on cooperation and support. Which phrase best describes feudalism in practice? A. strictly enforced code of chivalry B. unlimited rule by a few powerful monarchs C. frequent warfare among landowners****** D. economic ties

*asked on February 13, 2019* -
## Language Arts

Which of the following answer choices contains a METAPHOR? a. His skin was sandpaper. b. The sun sparkled like a diamond. * c. Sh wanted to be like the birds and fly away. d. They felt free when they ran through the doors. What is a key characteristic of a

*asked on January 14, 2016* -
## Calculus 1

A ball is thrown vertically upward from ground level with initial velocity of 96 feet per second. Assume the acceleration of the ball is a(t) = -32 ft^2 per second. (Neglect air Resistance.) (a) How long will it take the ball to raise to its maximum

*asked on December 3, 2018* -
## physics

Hi, ive been trying to get this problem for a couple of days now but i have no idea of what to do. A very slippery block of ice slides down a smooth ramp tilted at angle pheta. a)The ice is released from rest at vertical height h above the bottom of the

*asked on August 25, 2012* -
## Calculus and Vectors

An aircraft pilot wishes to fly from an airfield to a point lying S20oE from the airfield. There is a wind blowing from N80oE at 45 km/h. The airspeed of the plane will be 550 km/h. (a) What direction should the pilot steer the plane (to whole degree)?

*asked on October 1, 2018* -
## Chemistry

The heat of combustion of benzene, C6H6, is -41.74 kJ/g. Combustion of 3.65 of benzene causes a temperature rise of 4.41 C^o in a certain bomb calorimeter. What is the heat capacity of this bomb calorimeter? (kJ/C^o) So, I what I did was I multiplied

*asked on December 15, 2014* -
## algebra

the pressure (p) that a 160-pound person's shoe exerts on the ground when walking varies inversely with area (a) of the sole of the shoe. when the shoes have a sole area of 40 sq. in., the pressure is 4 pounds per sq. in. what is the sole area of the sole

*asked on March 3, 2012* -
## Chemistry

Wh does the blue color of Iodine disapear when amylose reacts with saliva? I had thought it was because Amylase in saliva will replace the I2 in the amylose coil and thus removes the color, but I got it wrong. I know it has to be connected to the Amylase

*asked on August 8, 2010* -
## Math

The cost for 3 dinners plus a 15% tip is $27.60. Write an equation representing the situation if p is the price of the dinner in dollars. You may asssume there is no tax.

*asked on September 9, 2016* -
## physics

A paperweight, when weighed in air, has a weight of W = 6.8 N. When completely immersed in water, however, it has a weight of Win water = 4.3 N. Find the volume of the paperweight.

*asked on December 11, 2009* -
## Chemistry

What are the major organic products of this reaction: CH3CH2CH2COCH2CH3 (an O is double bonded to the C before the O) + H2O --> (acid is above the arrow) DrBob222- There are 2 oxygens. I said there is an O double bonded to the C. So there is the O after

*asked on March 21, 2010* -
## chemistry

How is colloid distinguished from a solution or a suspension?

*asked on April 28, 2009* -
## Math

now write the biconditional for the statement. Remember to use the phrase if and only if to combine the original statement and it's converse. Please help me through this!

*asked on August 29, 2018* -
## Phyics

A uniform board is leaning against a smooth vertical wall. The board is at an angle above the horizontal ground. The coefficient of static friction between the ground and the lower end of the board is 0.710. Find the smallest value for the angle , such

*asked on November 10, 2013* -
## chemistry

How can distillation be used to prepare pure water from tap water?

*asked on April 28, 2009* -
## Chemistry

A 70.0 mL solution of 0.171 M potassium alaninate (H2NC2H5CO2K) is titrated with 0.171 M HCl. The pKa values for the amino acid alanine are 2.344 (pKa1) and 9.868 (pKa2), which correspond to the carboxylic acid and amino groups, respectively. a) Calculate

*asked on February 28, 2016* -
## science

Calculate the weight of a person with a mass of 67 kg that is holding a 12 kg box on earth

*asked on October 10, 2013* -
## social studies

which principles are typically associated with the republican party? select all that apply A.limited government B.social justice C.progressive ideals D. traditional values

*asked on May 15, 2017* -
## Science

When magnesium oxide (MgO) and water (H20)react, they produce magnesium hydroxide Mg(OH)2. Magnesium hydroxide is a medicine used to treat an upset stomach. The equation for this chemical change is shown below: MgO + H20 --> Mg(OH)2 if 40.00 grams of

*asked on December 11, 2014* -
## Physics-Gauss' Law, hard

Thank you Damon for answering my first questions fast and accurately. Do you or anybody else know how to do these harder Gauss' Law Problems? 1. A solid metal sphere of radius R has charge +2Q. A hollow spherical shell of radius 3R placed concentric with

*asked on March 23, 2008* -
## Phyics

A 49-N crate is suspended from the left end of a plank. The plank weighs 21 N, but it is not uniform, so its center of gravity does not lie halfway between the two ends. The system is balanced by a support that is 0.30 m from the left end of the plank. How

*asked on November 10, 2013* -
## math, calculus 2

Consider the area between the graphs x+y=16 and x+4= (y^2). This area can be computed in two different ways using integrals. First of all it can be computed as a sum of two integrals integrate from a to b of f(x)dx + integrate from b to c of g(x)dx What is

*asked on September 12, 2012* -
## Physics

When boiling water, a hot plate takes an average of 9 minutes and 47 seconds to boil 100 milliliters of water. Assume the temperature in the lab is 75 degrees Fahrenheit. The hot plate is rated to provide 195 watts. How efficient is the hot plate?

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

heading due north at 6.00 m/s relative to the water. The local ocean current is 1.53 m/s in a direction 40° north of east. What is the velocity of the ship relative to the earth?

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

A rectangular football field, including both end zones, is 120 yards long. The field has an area of 57,600 ft.². What is the width of the field in feet.

*asked on January 7, 2017* -
## Physics

A child's pogo stick stores energy in a spring with a force constant of 2.5×104N/m. At position A, the spring compression is a maximum and the child is momentarily at rest. At position B, the spring is in its equilibrium position and the child is moving

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

Is acid rain a homogeneous or heterogeneous mixture? If we mean that each drop of rain may not have the same amount of acid in it as the next drop, it must be heterogeneous. That would mean that each drop of rain absorbed different amounts of the

*asked on January 16, 2007* -
## History (@Ms. Sue??) :)

How is a Unitary system of government different from a federal system?? A) In a Unitary system, all powers are held by one government*** B) In a Unitary system, most powers are reserved to provincial governments C) In a Federal system, there are no checks

*asked on October 20, 2017* -
## Algebra Word Problem

During summer vacation, c children went to different destinations with their parents. 36% of the children went to Europe and 24 children to Asia. The rest of the children went to South America. How many children went to South America?

*asked on April 19, 2017* -
## phyics

You are installing a new spark plug in your car, and the manual specifies that it be tightened to a torque that has a magnitude of 65 N·m. Using the data in the figure, determine the magnitude F of the force that you must exert on the wrench.

*asked on November 1, 2013* -
## CHEMISTRY

A small drop of water assumes an almost spherical form on a Teflon TM surface. Explain why.

*asked on April 19, 2009* -
## ap stats

Violence in School, I An SRS of 400 American adults is asked “What do you think is the most serious problem facing our schools?” Suppose that in fact 40% of all adults would answer “violence” if asked this question. The proportion p of the sample

*asked on March 18, 2009* -
## Chemistry

The standard heat of formation of solid ammonium nitrate. NH4NO3 is -330kJ/mol. The equation that represents this process is: a) N2(g)+ 4H2(g)+3O2(g)->NH4NO3+ 330kJ b) 2N(g)+ 4H(g)+ 3O(g)-> NH4NO3+ 330kJ c) NH4(g)+ NO3(g)-> NH4NO3+ 330kJ d) 0.5N2(g)+

*asked on July 24, 2010* -
## Physics

Searches related to a motor lifts an elevator of mass m at constant speed. The power output of the motor is P and there are no frictional losses so that all the power output from the motor goes into lifting the elevator mass. What is the correct expression

*asked on November 10, 2016* -
## chemistry

Bromine is a red liquid at 25°C. Its density is 3.12 g/mL. What is the volume of 28.1 g of liquid bromine?

*asked on May 4, 2015* -
## Math

mariah bought a rectangular piece of land that was 3 miles long and 2 miles wide.She plans to divide into 2 sections of equal area. if she farms one of the sections how many square miles could be farmed?

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

Four identical masses of 3.4 kg each are located at the corners of a square with 1.5 m sides. What is the net force on any one of the masses?

*asked on January 4, 2011* -
## Algebra

What similarities and differences do you see between functions and linear equations studied in Ch. 3? Are all linear equations functions? Is there an instance when a linear equation is not a function? Support your answer. Create an equation of a linear

*asked on April 29, 2008* -
## Chemistry

What volume (in milliliters) of 0.100 M NaOH should be added to a 0.120 L solution of 0.024 M glycine hydrochloride (pKa1 = 2.350, pKa2 = 9.778) to adjust the pH to 2.95? I don't know how to do this problem! Steps with answers please!! HELP!!

*asked on February 28, 2016* -
## Physics

A 150 gram mass is attached to a horizontally aligned spring on a frictionless surface. A force of 10 Newtons will stretch the spring 25 centimeters. If the spring is compressed to 15 centimeters and then released, calculate: the spring constant; the

*asked on May 1, 2019* -
## Algebra

Tina is 3 years younger than Tom. The ages are in the ratio 2:3. Find their ages.

*asked on January 26, 2019* -
## music

Which of the following works helped to redefine the symphony as a genre? A. Beethoven's Sixth Symphony B. Beethoven's Fifth Symphony C. Symphonie Fantastique D. Beethoven's Ninth Symphony Im thinking its B, right?

*asked on January 14, 2013* -
## Chemistry

How many possible values for pair l and m_{l} are there when n_1 = 3? How many possible values for pair l and m_{l} are there when n_2 = 5? Express your answer as an integer. I understand the following solution: "we know that for a particular value of n ,

*asked on November 9, 2010* -
## PHYSICS

During a tennis match a player serves the ball at 23.6 m/s with the center of the ball leaving the raquet horizontally 2.37m abovet eht court surface. The net is 12m away and .9m high. When the ball reaches the net a) does the ball clear it and b) what is

*asked on October 24, 2006* -
## Statistics

There are 14 qualified applicants for 3 trainee positions in a fast-food management program. How many different groups of trainees can be selected?

*asked on September 9, 2019* -
## math

The circumference of a sphere was measured to be 82 cm with a possible error of 0.5 cm. Use linear approximation to estimate the maximum and relative error in the calculated surface area.

*asked on April 6, 2012* -
## maths

What is the sum of 4x dollars and 4x cents. Express your answer in cents .

*asked on July 16, 2015* -
## Math

Use a specific example to explore how the cross product behaves under scalar multiplication. Is it true that k (Vector a × Vector b) = (kVector a) × Vector b = Vector a × (kVector b)? Expand to the general case to prove your theory.

*asked on September 25, 2018* -
## math

what do you call it when somebody spens 20 years in the 24th row of a theater?

*asked on February 19, 2008* -
## Math

Find the parallel line to y=-1/5x+2.

*asked on July 10, 2019* -
## health

If you work in a hospital or doctor's office and assign numeric values to procedures and diagnoses for the purpose of reimbursement, you are a A. coding specialist B. medical assistant C. receptionist D. transcriptionist

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

A tank of water has been outdoors in cold weather, and a slab of ice 5.8 cm thick has formed on its surface (Fig. 18-46). The air above the ice is at -14°C. Calculate the rate of formation of ice (in centimeters per hour) on the ice slab. Take the thermal

*asked on January 12, 2012* -
## English

Check my work? Underline the adverb clause in each sentence below, and then answer the questions that follow. 12. When rain falls, my socks get wet. I underlined "my socks get wet" as the adverb clause a. What word (or words) does the clause modify. My

*asked on February 16, 2019* -
## please help asap!

A ladder, 5.0 m long, leans against a frictionless wall at a point 4.0 m above the ground. A painter is climbing up the ladder. The mass of the ladder is 12.0 kg and the mass of the painter is 60.0 kg. The ladder begins to slip at its base when the painter

*asked on March 24, 2014* -
## Chem

If a rock climber accidentally drops a 56-gram piton from a height of 375 meters, what would its speed be before striking the ground? Ignore the effects of air resistance.

*asked on September 11, 2012* -
## Comm 155

I need help finding the adverbs and adjectives in this sentence. I think I found some. Please help. As I started building up my credit, I took it slow so that I would not over-extend myself at such a young age. Not long after I got my credit going I

*asked on May 3, 2011* -
## English (Check)

What type of question can the bolded text help you answer? My social studies teacher, Ms. Galvez, rolled her eyes at me and I rolled my eyes back at her. The Man was always coming down on me, just because I go through school firewalls like wet Kleenex,

*asked on September 26, 2017* -
## math gr 2

P(n,5)=20P(n,3) Solve for n

*asked on September 30, 2008* -
## Chemistry

the vapor from an unknown volatile liquid occupies a 269 ml. Erlenmeyer flask at 98.7 C and 748 mm Hg. The mass of the vapor is 0.791 g. A. how many moles of vapor are present? B. What is the molar mass of the volatile liquid?

*asked on April 24, 2019* -
## Chemistry

The enthalpy of solution is the amount of energy absorbed or released when a solute is dissolved in a solvent. Suppose a 650 g ‘cold pack’ drops in temperature from 24 Celsius to -15 Celsius when its constituents mix. Assuming the specific heat of this

*asked on May 1, 2019* -
## English

Check my work? Underline the adverb clause in each sentence below, and then answer the questions that follow. 15. The insect will drown when it crawls inside. I underlined " it crawls inside." as the adverb clause a. What word (or words) does the clause

*asked on February 16, 2019* -
## economics

The demand curve for knobs is P=75-6QD and the supply curve for knobs is P=35+2QS. What is the equilibrium price of a knob?

*asked on December 20, 2013* -
## music

Einstein on a Beach was a unique opera because it A. had a single violinist. B. was exclusively recitative. C. was written in Chinese. D. had no plot and very little singing. Is it C?

*asked on January 15, 2013* -
## Physics

If you have swam one lap in a swimming pool, that means you have swam from one end to the other and back. In 4.5 h, a swimmer makes exactly 69 laps in a swimming pool that is 35 m long. Determine the distance the swimmer traveled, the total displacement of

*asked on January 19, 2014* -
## Calculus HELP

Determine the derivative of the function ƒ(x) = x^3 − 12x^2. Now determine the derivative of the function g(x) = x^3 − 12x^2 + 6. How are the two functions related? How are the derivatives of the two functions related? I know the derivative, however

*asked on December 9, 2018* -
## Physics

A motor lifts an elevator of mass m at constant speed. The power output of the motor is P and there are no frictional losses so that all the power output from the motor goes into lifting the elevator mass. What is the correct expression for the time

*asked on November 10, 2016* -
## Physics

The atomic mass of a nitrogen atom (N) is 14.0 u, while that of an oxygen atom (O) is 16.0 u. Three diatomic gases have the same temperature: nitrogen (N2), oxygen (O2), and nitric oxide (NO). Rank these gases in ascending order (smallest first), according

*asked on October 27, 2014* -
## physics

a 65 kg student, starting from rest , slides down an 8 meter high water slide. how fast is he going at the bottom of the slide ?

*asked on January 20, 2013* -
## Physics

A 45 kg cart is moving across a frictionless floor at 1.7 m/s. A 60 kg boy, riding in the cart, jumps off the cart so that he hits the floor moving forwards in the initial direction of the cart's motion with a velocity of 2.8 m/s. What is the velocity of

*asked on January 15, 2012* -
## Calculus

Find two numbers whose sum is 10 for which the sum of their squares is a minimum.

*asked on December 16, 2008* -
## math

Let y = tan(5x+2). Find the differential dy when x = 2 and dx = 0.4 Find the differential dy when x = 2 and dx = 0.8

*asked on March 28, 2012* -
## chemistry

A sample of unknown gas weighs 2.96 g and occupies 750. mL at 760. mmHg and 100.°C. What is the molar mass of the unknown gas?

*asked on March 20, 2012* -
## English

Check my work? Underline the adverb clause in each sentence below, and then answer the questions that follow. 13. My grandma always yells at me because I only own two pairs of socks. I underlined " I only own two pairs of socks " as the adverb clause a.

*asked on February 16, 2019* -
## Vectors

Find the scalar equation of the plane through the points M(1,2,3) and N(3,2,-1) that is perpendicular to the plane with equation 3x + 2y + 6z +1 = 0.

*asked on October 11, 2018*