Thursday
October 2, 2014

Posts by Sarah


Total # Posts: 4,005

Physics
A(n) 0.187 kg baseball is thrown with a speed of 29 m/s. It is hit straight back at the pitcher with a final speed of 22.3 m/s. What is the magnitude of the impulse delivered to the ball? Answer in units of kg · m/s
April 23, 2012

Biology
What does follicular activity mean?
April 23, 2012

mosinee
First you take 1,009.88 and subtract 130. that'll give you 879.88. then you add 6.19to that number and there's your answer
April 23, 2012

Biology
I am analyzing a scientific article for my biology class. I am trying to comprehend all of the terms used and am hoping I can gain other's insight as to where this article is flawed and what could have been done to improve it. The article is titled: Effect of age and ...
April 23, 2012

chemistry
The molal boiling point constant (Kb) for water is ).51oC/m and the molal freezing point constant (Kf) for water is 1.86oC/m. Given this information here is the question... If I pour 25 mL of 0.035 M NaOH into 975 mL of water, what is the new concentration of NaOH?
April 19, 2012

Chemistry
At 50 degrees, 100 grams of water is saturated with cerium (III) sulfate. How many grams of cerium (III) sulfate must be added to saturate the solution at zero degrees celsius?
April 18, 2012

Chemistry
If 30 grams of KCl is dissolved in 100 grams of water at 40 degrees celsius, how many additional grams of KCl would be needed to make the solution saturated at 80 degrees celsius?
April 18, 2012

CHEMISTRY
A student calibrates his/her calorimeter. S/he performs part 1 as instructed. The data are: 99.2 g water at 36.0°C are added to 97.3 g water in the calorimeter at 16.0°C. The final temperature is 26.0°C. Calculate the heat capacity of the calorimeter in J/°C.
April 17, 2012

biology
how can you identify gasses released by plants and animals
April 17, 2012

Math
If i had a 65% in a course now, and i need a 70% to pass, What will i need to get on my final exam worth 25% to pass the course?
April 17, 2012

CHEMISTRY
A student calibrates his/her calorimeter. S/he performs part 1 as instructed. The data are: 99.2 g water at 36.0°C are added to 97.3 g water in the calorimeter at 16.0°C. The final temperature is 26.0°C. Calculate the heat capacity of the calorimeter in J/°C.
April 16, 2012

CHEMISTRY
Suppose 1400 J of heat energy are put into a sample of liquid water at 23°C, and the final temperature of the water is 78°C. How many grams of water are present?
April 16, 2012

Math
If i had a 65% in a course now, and i need a 70% to pass, What will i need to get on my final exam worth 25% to pass the course?
April 16, 2012

Chemistry
If the literature value for the ΔHfus of water is 6.01 kJ/mol, how many kJ of heat energy would be required to completely melt 130 g of ice at 0°C?
April 16, 2012

physics
oh you meant in the question, sorry they didn't copy over!
April 16, 2012

physics
what units were missing? I see units on all my numbers. I found it though, I just had to divide my radius in half... although I do not know why!
April 16, 2012

physics
If a 80 lightbulb emits 4.0 of the input energy as visible light (average wavelength 550 ) uniformly in all directions, estimate how many photons per second of visible light will strike the pupil (4.0 diameter) of the eye of an observer 3.0 away. 1. I found the energy of ...
April 16, 2012

us history
what was James L. Farmer, Jr. political and religious views?
April 13, 2012

math
wtf none of your beess wax
April 12, 2012

math
A map has a scale of 1/2 inch to 4 miles. The shortest distance between two cities on the map measures 8 inches. If d represents the shortest distance between the two cities, what is d?
April 11, 2012

physics!
The far point of a nearsighted person is 5.8 m from her eyes, and she wears contacts that enable her to see distant objects clearly. A tree is 18.7 m away and 1.8 m high. (a) When she looks through the contacts at the tree, what is its image distance? (b) How high is the image...
April 10, 2012

Math
A bag of marbles contains 5 red, 12 blue and 5 yellow. What is the ratio of red marbles to non red marbles?
April 9, 2012

Finance
Jungle, Inc. has a target debt-equity ratio of 0.72. Its WACC is 11.5 percent and the tax rate is 34 percent. What is the cost of equity if the aftertax cost of debt is 5.5 percent?
April 9, 2012

kinesiology
what joint does splenius muscle cross?
April 5, 2012

psychology
What is concepts of reliability and validity as they pertain to psychological testing? I have a test comming up and I am confused by the concepts of reliability and validity as they pertrain to psychological testing. Can someone explain this to me? thank you!
April 5, 2012

psychology
Mike waits until the night before his big exam to start studying. He maintains that last minute cramming keeps the information fresh in his memory. What does connectionist network research tell us about the effectiveness of cramming? a)It is very effective because the ...
April 4, 2012

Physics
An alpha particle, initially moving at a speed of 7.10x10^5m/s, goes through a potential difference of 2500V. Determine the final speed of the alpha particle. Answer: 8.64 x 10^5
April 3, 2012

Physics
The sound from a mosquito is produced when it beats its wings at the average rate of 559 wing beats per second. What is the wavelength of the sound?
April 2, 2012

Ap chem
When 80.4 moles of calcium acetate are dissolved in enough water to make 222.2 milliliters of solution, what is the molarity of acetate ions? Answer in units of M I already tried moles/liter and it was wrong
April 1, 2012

World History
Why were the cash economies introduced by the Europeans unsuitable for African countries?
March 30, 2012

physics
A bullet of mass 12.4 g is fired into an initially stationary block and comes to rest in the block. The block, of mass 1.02 kg, is subject to no horizontal external forces during the collision with the bullet. After the collision, the block is observed to move at a speed of 4....
March 29, 2012

geometry
a person is standing 12m away from a street light that is 9m tall. How tall is he if his shadow is 3m long?
March 29, 2012

physics
The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an rms value of 1.90 10-10 T. The wave passes perpendicularly through an open window, the area of which is 0.20 m2. How much energy does this wave carry through the window during a ...
March 26, 2012

physics
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.7 x 10^-6 T. What is the intensity S of the wave?
March 26, 2012

Physics help!
Suppose that a police car on the highway is moving to the right at 26 m/s, while a speeder is coming up from almost directly behind at a speed of 37 m/s, both speeds being with respect to the ground. The police officer aims a radar gun at the speeder. Assume that the ...
March 26, 2012

child psychology
Mishel's research shows that --------- is especially important in teaching children to delay gratification and resit temptation. A. the desire-theory of mind B.diverting attention C.perspective taking D.reinforcing I think its C, am I correct please help
March 26, 2012

child psychology
what is the only emotion that males express freely than females in every day interaction A.anger B.Sorrow C.Embarrassment D.Envy I think it is A but not sure because at time girls are the more aggresive ones. please help
March 26, 2012

child psychology
Parents of impulsive children can foster conscience development by building a a warm affectionate relationship the promotes A. secure attachment B.ego development I stongly believe its A please help
March 26, 2012

child psychology
Typically when paired with a boy in a laboratory play session, a two year old girl is likely to A. stand idly while the boy explores the toy B.assume domineering behavior, telling him what to do C.actively explore the surroundings D.play cooperatively with the boy I think its ...
March 26, 2012

child psychology
A parent who uses imperitives and specifit suggestions in everyday life is most likely the parent of A.son B.daughter C.teenager D.son and a daughter I think its C but not sure because teenagers dont have time to listen
March 26, 2012

child psychology
I still need help with this question Which young adult is at risk of long term identity foreclosure or diffusion? A. A college graduate who switces majors B. An aspiring chef who has no opportunity for culinary training. C.A young woman with several possible vocational choices...
March 25, 2012

child psychology
Do you suggest it is A Thanks
March 25, 2012

child psychology
Dean associates certain activites,roles, and traits as being typical for either males or females.His associations conform to cultural stereotypes and encompass many gender-linked responses.This is an example of gender: A.atypicality B.roles C.typing D.identity I think its B or...
March 25, 2012

child psychology
I strongly believe it is A
March 25, 2012

child psychology
which young adult is at risk of long-term identity foreclosure or diffusion A.An aspiring chef who has no ooportunity for culinary training. B. A peace corps volunteer.
March 25, 2012

Math
JJ's boat will go 15 mph in still water. If he can go 12 mph downstream in the same amount of time it takes to go 9 mph upstream, what is the speed of the current?
March 25, 2012

kinesiology
how would you ensure proper development of the antagonist muscles at the elbow joint? please explain
March 24, 2012

us history
Which factor, self-interest or idealism, was more important in driving American foreign policy in the years 1895-1920?
March 24, 2012

child psychology
Dean associates certain activities,roles,and traits as being typical for either males or females.His associtions conform to cultural stereotypes and encompass many gender-linked responses.This is an example of: A.roles B.Identity C.Atypicality I think its B. Am I correct Thanks
March 23, 2012

child psychology
which young adult is long-term identitity foreclosure or diffusion A. college graduate who switches majors B.An aspiring chef who has no opportunity for culinary training. C.A young woman with several possible vocational choices. D.A peace corps volunteer. My choice is D. Am I...
March 23, 2012

CHEMISTRY
Rank the following complex ions in order of increasing wavelength of light absorbed. (Use the appropriate <, =, or > symbol to separate substances in the list.) Co(H2O)63+, Co(CN)63-, CoI63-, Co(en)33+
March 21, 2012

physics 30
An alpha particle moving at a speed of 5.20x10^4 m/s enters a perpendicular magnetic field with a strength of 3.0 mT. The magnitude of the acceleration of the particle as it enters the magnetic field will be a.bcx10^d m/s^2 ?
March 21, 2012

physics 30
A current-carrying conductor that is 8.00x10^-2 m long is placed perpendicular to a magnetic field that has a strength of 6.00x10^-3 T. During a 3.00s time interval, 7.50x10^19 electrons pass a point in the conductor. The magnitude of the average magnetic force exerted on the ...
March 21, 2012

physics 30
A charged particle with mass m, and a charge q, is moving through a perpendicular magnetic field of strength B at a velocity,v. The particle is deflected through a curved path with a radius of 15.0 cm. If the speed of the same particle is doubled and the magnetic field is ...
March 21, 2012

physics 30
An electron that has a distance of 10.0 cm , is accelerated from rest through a potential difference of 4.50 kV before it enters a region between perpendicular elecric and magnetic fields. The electron moves into a region between positively charged plate and a negatively ...
March 21, 2012

physics 30
Draw a scenerio with a magnet and the solenoid below that would induce a flow of electrons to the right of the page in the ammeter, as shown below.
March 21, 2012

physics 30
A magnet dropped through a vertical solenoid will fall at a rate that is slower than gravity, and will induce an electric current within the solenoid. which physics principle explain these phenomena ?
March 21, 2012

Math
Let csc(x)=-3. Find all possible values of sin(x)+cos(x) ------------- sec(x)
March 20, 2012

childhood education
The goal of Binet and Simons original intelligence test was to: A.develop an objective method for assigning students to special classes. B.determine the underlying mental abilties associated with intelligence. My choice is A.Is it correct? thanks
March 20, 2012

Momentum Physics
31.3
March 19, 2012

child psychology
Connectionists models provide evidence that? Please help!
March 19, 2012

CHEMISTRY
Rank the following complex ions in order of increasing wavelength of light absorbed. (Use the appropriate <, =, or > symbol to separate substances in the list.) Co(H2O)63+, Co(CN)63-, CoI63-, Co(en)33+
March 19, 2012

geometry
Determine the name of the quadrilateral that fits the given property. Only one pair of opposite sides is parallel. This quadrilateral is a _________. A. kite B. rectangle C. rhombus D. square E. trapezoid
March 19, 2012

algebra
At what interest rate would a deposit of $45,000 grow to $110,682 in 30 years with continuous 38) compounding?
March 18, 2012

CHEMISTRY
What is the electron configuration for the transition metal ion(s) in each of the following compounds? Na2[TaF7] Cant seem to figure this one out...
March 18, 2012

health
if you were going to leave your home and your kids put you to aged care facility how would you feel and how would you think and what would you miss the most
March 18, 2012

childhood education
Which factors seem to be most important for development of make-believe play. A. children's readiness to engage in make- believe play and social experiences that promote it. B.opportunities for peer interaction in settings that inspire make-believe play.
March 15, 2012

child psychology
Piagets famous -----------problem demonstrates preoperational children's difficulity with---------- A. three mountains; dual representation B.three mountains;hierarchical classification. C. class inclusion; hierarchial classification
March 15, 2012

Math
How do you list 2/3,1/2,1/3,3/4,1/8 from least to greatest?
March 15, 2012

Chemistry
What is the electron configuration for the transition metal ion(s) in each of the following compounds? Na2[TaF7] Cant seem to figure this one out...
March 14, 2012

chemistry
What mass of sulfur msut be used to produce 17.1 L of gaseous sulfur dioxide at STP according to the following equation? S8 (s) + 8O2 (g) -> 8 SO2 (g) Answer in units of g
March 14, 2012

Pre Algebra
You deposit $3350 into a savings account that earns 5% interest compounded annually. Find the balance of the account after 2 years. Round your answer to the nearest cent
March 13, 2012

business
Assignment Choose a company that has experienced negative press recently about its financial dealings. Provide a financial summary of your selected company’s financial health, including a timeline of possible financial gains and losses. Define 2 financial concepts and how...
March 11, 2012

principles of business
The company I choose that has experienced negative press recently about its financial dealings; is Deutsche Bank A.G. home office is located in Germany; The Deutsche Bank opened its first branch in NY in 1979 and was the first German bank to list on the NYSE (in October 2001...
March 11, 2012

principles of business
Assignment Choose a company that has experienced negative press recently about its financial dealings. Provide a financial summary of your selected company’s financial health, including a timeline of possible financial gains and losses. Define 2 financial concepts and how...
March 11, 2012

Physics
a 60 gram tennis ball completed 5 revolutions in 1.68 seconds. given that the radius was 35 centimeters, what haning mass was used
March 10, 2012

AP Chem
An apparatus consists of a 4 L flask containing nitrogen gas at 32 C and 885 kPa, joined by a valve to a 8 L flask containing argon gas at 32 C and 47.5 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing? Answer in units of kPa
March 10, 2012

AP chem
An apparatus consists of a 4 L flask containing nitrogen gas at 32C and 885 kPa, joined by a valve to a 8 L flask containing argon gas at 32 C and 47.5 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing? Answer in units of kPa
March 9, 2012

chemistry
I got x=0.091766....now what do i do? I'm confused. Also can check if this is right for x?
March 9, 2012

chemistry
What answers did u get for PCl5 and PCl3...I want to verify them please.
March 9, 2012

chemistry
Phosphorus pentachloride decomposes according to the chemical equation PCl5(g) -----> PCl3 (g)+ Cl2(g) Kc= 1.80 at 250 degrees C A 0.463 mol sample of PCl5(g) is injected into an empty 4.80 L reaction vessel held at 250 °C. Calculate the concentrations of PCl5(g) and ...
March 9, 2012

health
list 3 documents that protect the legal rights of individuals at health care
March 9, 2012

Chemistry
Thank you so much!
March 8, 2012

Chemistry
I know how to convert moles to mass, atoms, volume etc. and I can find the limiting reagent and the percentage yield of some basic problems.
March 8, 2012

Chemistry
When MoO3 and Zn are heated together they react 3Zn(s)+2MoO3(s) --> Mo2O3(s)+3ZnO(s) What mass of ZnO is formed when 20.0 grams of MoO3 is reacted with 10.0 grams of Zn?
March 8, 2012

math
Suppose that a<b are extended real numbers and that f is differentiable on (a,b). If f' is bound on (a,b) prove f is uniformly continuous.
March 8, 2012

Chemistry
Thank you!
March 8, 2012

Physics
thank you for your help! I really appreciate it.
March 8, 2012

Physics
i'm not sure how to begin the problem at all. Or else I would have shown some work. thanks though
March 8, 2012

Physics
In the figure, two balls are located in deep space. The black ball has mass 56kg and the red ball has mass 17kg. The distance between the two balls is r=24cm. (a) Find the magnitude of the acceleration of the red ball. m/s2 (b) If r is 5 times larger, with what factor will the...
March 8, 2012

Physics
You are in a space shuttle traveling in the circular orbit, which is 380 km above the Earth. Your friend is in another space shuttle traveling on the same circular orbit with you, but he is 20 km ahead of you. (a) How long will it take you to catch up with your friend if you ...
March 8, 2012

Physics
A box of mass 250 kg slides 4.6 m down an inclined plane of 31°. Jim pushes against the box to keep it from accelerating. The coefficient of kinetic friction between the box and the ramp is 0.41 (a) Calculate the magnitude of the force exerted by Jim. (b) Calculate the ...
March 8, 2012

Chemistry
Ammonium iodide dissociates reversibly to ammonia and hydrogen iodide. NH4I(s) <==> NH3(g) + HI(g) At 400°C, Kp = 0.215. Calculate the partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C. Please help! would ...
March 8, 2012

Physics
How far above the surface of Earth would you weigh 63.6 percent of your surface weight?
March 5, 2012

Physics
A bicyclist traveling at 7 m/s rides around an unbanked curve. The coefficient of friction between the tires and the road is 0.38. What is the radius of the shortest turn that the bicyclist can safely make?
March 5, 2012

physics
an experimental rocket plane lands on skids on a dry lake bed. it is traveling at 80.0 m/s when it touches down, how far does it slide before it comes to a stop? assume the coeffcient of kinetic friction between the skids and the lake is .600
March 5, 2012

algebra
8r+7r=75
March 5, 2012

Chemistry
Consider the following electron configuration. (σ3s)2 (σ3s*)2 (σ3p)2 (π3p)4 (π3p*)4 Select four species that, in theory, would have this electron configuration.
March 4, 2012

Anthropology
In dancing with skeletons, in mali, who is usually blamed if a child is born with something the matter with it?
March 1, 2012

physics
explain why a child on a swing comes to rest directly below the top of the swinng
February 29, 2012

Pages: <<Prev | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | Next>>

Search
Members