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Questions Asked on September 15, 2010

An engineer in a locomotive sees a car stuckon the track at a railroad crossing in front of the train. When the engineer first
1. 7 answers
2. asked by Jennifer
3. 13,944 views
Due to the screening effect, the 3s electrons of magnesium (Mg) feel an effective nuclear charge (Zeff) of:1. +1 2. +2 3. −2
1. 3 answers
2. asked by Bill
3. 6,649 views
A cell can be prepared from copper and tin. What is the E° cellfor the cell that forms from the following half reactions?Cu2+(a
1. 5 answers
2. asked by lucylu
3. 5,777 views
A solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting solution?is 1.05 g/ml. the
1. 1 answer
2. asked by john
3. 5,365 views
The concentration of lead nitrate (Pb(NO3 )2 ) in a 0.726 M solution is __________ molal. The density of the solution is 1.202g/
1. 2 answers
2. asked by john
3. 4,904 views
Isochron DiagramsPage 14 of 17 On the control part of the graph select the Rb/Sr option. Rember that the Half-life of Rb-87 is
1. 4 answers
2. asked by Anonymous
3. 4,364 views
When ice melts, it absorbs 0.33 kJ per gram. How much ice is required to cool a 12.0 fluid ounce drink from 75°F to 35°F, if
1. 8 answers
2. asked by Rebekah
3. 3,604 views
The distribution of heights of adult American men is approximately normal with mean 69 inches and standard deviation 2.5 inches.
1. 2 answers
2. asked by Emily
3. 3,377 views
What mass of iodine contains the same number of atoms at 25.0 g of chlorine?
1. 2 answers
2. asked by Anonymous
3. 3,241 views
If a state is outside of the contiguous United States, what does this mean? It means that it is not connected to or touching any
1. 14 answers
2. asked by Reed
3. 3,222 views
1. Which learning technique is frequently used in the expository model of teaching?A. Deductive thinking C. Discovery learning
1. 9 answers
2. asked by Sum1Special
3. 3,078 views
if h(t) represents the height of an object above ground level at time t and h(t) is given by h(t)=-16t^2+13t+1.find the height
1. 1 answer
2. asked by Jenny
3. 2,859 views
In the figure below the left hand calbe has a tension T1 and makes an angle of 42 with the horizontal. the right hand calbe as a
1. 2 answers
2. asked by Josh
3. 2,436 views
a jet plane lands with a speed of 101 m/s and can accelerate at a maximum rate of -4.60 m/s2 as it comes to rest.(a) From the
1. 1 answer
2. asked by jer
3. 2,390 views
Glenda wants to glue glitter over a piece of felt shaped like a parallelogram with a height of 36 in. and a base of 46 in. If
1. 2 answers
2. asked by Katie
3. 2,240 views
Let W represent the width of a rectangle, the length if 7cm more than the width.I have to write the answer in a algebraic
1. 5 answers
2. asked by Not putting it
3. 2,152 views
6p2 is the last one of the electron configuration. I think the element is Pb. How do I know the charge of the element?
1. 1 answer
2. asked by Morgan
3. 2,115 views
Find an expression for the function whose graph is the given curve.The top half of the circle x^2 + (y-2)^2 = 4 Please Help. I
1. 3 answers
2. asked by Chelsea
3. 2,075 views
The first ionization potential of the elements B, C, and N (atomic numbers 5, 6, and 7) steadily increases, but that of O is
1. 1 answer
2. asked by dave
3. 2,074 views
is the limit as x approaches 0 of sin3x over 3x equal to zero?sorry-- basically this is my problem: lim [sin 3x / 4x) x-> 0
1. 3 answers
2. asked by APpreciative student
3. 2,073 views
In which reaction does the oxidation number of oxygen increase?a. Ba(NO3)2+K2SO4--->BASO4+2KNO3 b. HCL+ NaOH---> NaCl+H20 c.
1. 1 answer
2. asked by Hiba
3. 2,032 views
Express the surface area of a cube as a function of its volume.I did this and got A=6V^(2/3) That is the formula I got for the
1. 3 answers
2. asked by Chelsea
3. 1,969 views
Que te gusta hacer?Will someone give me some possible answers for this question?
1. 3 answers
2. asked by j
3. 1,954 views
Could you please let me know if everything is OK? Thank you.1) He also explained to him that the natives had attacked the
1. 1 answer
2. asked by Franco
3. 1,935 views
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.050 s, during which
1. 2 answers
2. asked by veronica
3. 1,912 views
Suppose that you start with .303g of copper wire and faithfully follow the procedure. at the end you find that the copper dust
1. 2 answers
2. asked by Missy
3. 1,864 views
A particle leaves the origin with an initial velocity v=(2.40 m/s)x hat and moves with a constant acceleration a=(-1.90 m/s ^2)x
1. 1 answer
2. asked by Ka
3. 1,621 views
write a sentence that explains how the terms tributary and drainage basin are realated
1. 5 answers
2. asked by Anonymous
3. 1,616 views
You have a slice of pizza with a central angle that measures 140° that you want to share with your friend. She cuts it through
1. 3 answers
2. asked by jackie
3. 1,611 views
what is the mass of an object in kg that is 1225 N
1. 1 answer
2. asked by hannah jenson
3. 1,586 views
Assume that the given angles have been measured, and calculate the angles (marked as x) that could not be found by direct
1. 3 answers
2. asked by Anonymous
3. 1,536 views
A 43 kg sample of water absorbs 343 kJ of heat. If the water was initially at 22.1°C, what is its final temperature?I got 1.9
1. 5 answers
2. asked by hannah
3. 1,522 views
Use at least five adverbs and five adjectives to write a 150- to 300-word review of a movie, sporting event, musical
1. 1 answer
2. asked by dazzy
3. 1,506 views
A child on a sled reaches the bottom of a hill with a velocity of 12.0 m/s and travels 22.0 m along a horizontal straightaway to
1. 1 answer
2. asked by Phil
3. 1,481 views
[Cu(NH3)4]2+ + SO4(aq)2 + H2O [Cu(NH3)4]SO4•1H2OWhat is the theoretical yield of the products?
1. 1 answer
2. asked by Leila
3. 1,461 views
An elastic cord is attached to two back teeth and stretched across a front tooth. The purpose of this arrangement is to apply
1. 0 answers
2. asked by Mr. D
3. 1,398 views
Help!Toshiro Hashimoto invested some money at 4.5% simple interest and $1000 more than four times the amount at 6%. His total
1. 1 answer
2. asked by Joel
3. 1,371 views
A particle is moving in the xy plane with constant acceleration. At t=o, the particle is given by x=4m, y=3m, and has a velocity
1. 0 answers
2. asked by Anonymous
3. 1,367 views
what is the rising action in the story "The School Play' By: Gary Soto
1. 4 answers
2. asked by alma
3. 1,321 views
Which of the following statements correctly interprets a 95% confidence interval on a population mean?a. It is a single point
1. 1 answer
2. asked by Beata Chmielewska
3. 1,320 views
At one stage you add phosphate ion to the ractions sequence. where exactly does this phosphate end up? It is not weighed in with
1. 2 answers
2. asked by Missy
3. 1,288 views
I'm writing an essay on the topic " Contributing to the community" and I was wondering what you guy think if I start my first
1. 1 answer
2. asked by Shadow
3. 1,257 views
Determine the equations of the followinglines: (a) having slope ¡1 and passing through (0; 2) (b) parallel to y=2x-1 and
1. 5 answers
2. asked by Preston
3. 1,253 views
What three continents does the Artic Circle pass through? My answer is North America, Europe and Asia. Am I correct??
1. 3 answers
2. asked by Reed
3. 1,217 views
How many liters of water must be added to 4 liters of a 6 molar HNO3 solution to create a solution that is 2 molar?
1. 5 answers
2. asked by Hiba
3. 1,192 views
I have to come up with an Internal Assessment topic for history, and I want something that focuses on Trotsky, but I'm having
1. 1 answer
2. asked by Lauren
3. 1,190 views
A lightning bug flies at a velocity of 0.25m/s due east toward another lightning bug seen off in the distance. A light breeze
1. 3 answers
2. asked by Joel
3. 1,167 views
.0815 moles NO are reacted with .0789moles O2 gas to form NO2 gas according to the following equation: 2NO +O2=2NO2 determine
1. 1 answer
2. asked by Missy
3. 1,161 views
I'm confused about the meaning of this sentence:The typical family is three or four children; the latter among the 8 to 12
1. 4 answers
2. asked by Amy~
3. 1,151 views
Find the requested angle.The supplement of 135°.
1. 3 answers
2. asked by Katie
3. 1,149 views
A 1200 kg airplane starts from rest and with a constant average forward acceleration of magbitude 5.0 m/s, reaches its takeoff
1. 1 answer
2. asked by Dakota
3. 1,148 views
what is the shortest possible time in which a bacterium could drift at a constant speed of 3.5mm/s across a petri dish with a
1. 2 answers
2. asked by karina
3. 1,127 views
Two trees have perfectly straight trunks and are both growing perpendicular to the flat horizontal ground beneath them. The
1. 1 answer
2. asked by veronica
3. 1,114 views
find PD if the coordinate of P is -7 and the coordinate of Dis -1
1. 2 answers
2. asked by keke
3. 1,096 views
I did help with my thesis statement? I writing an essay from the play trifles by susan Glaspell.Thesis: Minnie Wright loses her
1. 3 answers
2. asked by terri
3. 1,083 views
The drawing shows an elastic cord attatched to two back teeth and stretched across a front tooth. The purpose of the arrangement
1. 1 answer
2. asked by Jacob
3. 1,079 views
What are some of the organizational costs when managers do not handle prejudiced or stereotypical behavior appropriately?
1. 0 answers
2. asked by FlowerPower
3. 1,069 views
Imagine that you want to create an activity for a group of children to simulate the periodic table. Suggest items that you may
1. 0 answers
2. asked by Anonymous
3. 1,055 views
Estimate the average force exerted by a shot-putter on a 6.5 kg shot if the shot is moved through a distance of 2.7 m and is
1. 1 answer
2. asked by Phil
3. 1,047 views
A uniform electric field of magnitude 203 V/m is directed in the negative y direction. A +12.5 μC charge moves from the origin
1. 0 answers
2. asked by VJC
3. 1,044 views
Sorry!HEPES, is a commonly used component of physiological buffers. The PKa of the protonated amino group of HEPES is 7.55 at
1. 2 answers
2. asked by Angel
3. 1,028 views
Explain what the CPI is and do you think that the CPI accurately measures the rate of inflation?
1. 1 answer
2. asked by Anonymous
3. 1,017 views
1) He also explained to him that the natives had attacked the steamer because they didn’t want Marlow to leave. He himself was
1. 0 answers
2. asked by Franco
3. 1,010 views
At one stage you add phosphate ion to the ractions sequence. where exactly does this phosphate end up? It is not weighed in with
1. 0 answers
2. asked by Missy
3. 1,004 views
You are pulling a suitcase through the airport at a constant speed. the handle of the suitcase makes an angle of 45 degrees with
1. 1 answer
2. asked by Jorge
3. 994 views
Calculate the amount of heat required to raise the temperature of a 25 g sample of water from 5°C to 10.°C.i got 523 then
1. 9 answers
2. asked by Rebekah
3. 992 views
In Handmaid's Tale, What can you tell about the period just from the first sentence?"We slept in what had once been the
1. 2 answers
2. asked by John
3. 992 views
CaCO3 = CaO +CO2after a 15.8g sample of calcium carbonate was heated in an open container to cause decompostition the mass of
1. 1 answer
2. asked by Missy
3. 983 views
A sled with a weight of 200N is being pulled from rest by a force of 40 N across ice which has a coefficient of kinetic friction
1. 3 answers
2. asked by K. Polska
3. 980 views
A program in Senegal has been reducing infant mortality at a rateof 11.1% per year. How long will it take for infant mortality
1. 2 answers
2. asked by rene
3. 975 views
What muscial form preceded the sonata allegro form that was often considered dramatic and rewarding.
1. 2 answers
2. asked by Kelli
3. 966 views
what is the standard deviation if 12 randomly chosen students were asked how many times they had missed class during a certain
1. 1 answer
2. asked by clemencia
3. 954 views
how many moles of Cl2 will be produced from the reaction of 9.61 moles of HCl? MnO2 + 4HCl = MnCl2 +Cl2+2H2O
1. 2 answers
2. asked by Missy
3. 950 views
Which macromolecules were present in your saliva and food choices? Explain why you think you got the results you did.
1. 2 answers
2. asked by bob stanfield
3. 940 views
Find the average rate of change of the function f(x) = 2x4 +3x2 ¡ x + 2: (a) on the interval [0; 3] and (b) on the interval
1. 4 answers
2. asked by Preston
3. 937 views
The leg and cast in the figure below weigh 280 N, with the center of mass as indicated by the blue arrow in the diagram. The
1. 0 answers
2. asked by Erica
3. 928 views
How does nature and nurture contribute to one’s self-efficacy?
1. 1 answer
2. asked by Carmen
3. 925 views
The null hypothesis is:a. Always contains a > in the equation b. Not needed c. The alternative hypothesis d. The hypothesis of
1. 1 answer
2. asked by Beata Chmielewska
3. 921 views
what role did the geography of Europe play in the development of and ways of life in these towns?
1. 3 answers
2. asked by joe
3. 917 views
explain the connection between european exploration of north and south amwerica and international trade? is there any
1. 3 answers
2. asked by Bobby
3. 916 views
in the first chapter of the book,section 1 review.i need help with number 3 and 4. number 3 is in what ways did native american
1. 1 answer
2. asked by imaani
3. 914 views
A particle moving initially at 4 m/s in the positive x direction is given an acceleration of 3 m/s^2 in the positive y direction
1. 1 answer
2. asked by Jess
3. 895 views
How many grams of aspirin is equlvalent to 150 mg of aspirin?
1. 1 answer
2. asked by janay
3. 893 views
AB is DC parallel to . Identify two pairs of congruent angles and the number of degrees in each congruent angle.A) FAB BAD ;
1. 1 answer
2. asked by Victoria
3. 888 views
What mass of copper(II) nitrate would be produced from the complete reaction of 25.1 g of copper, according to the chemical
1. 1 answer
2. asked by vanessa
3. 880 views
A charge of -4.191 μC is located at (5.100 m, 6.402 m), and a charge of 1.895 μC is located at (-1.436 m, 0).Calculate the
1. 1 answer
2. asked by VJC
3. 876 views
Write an equation of the line satisfying the given conditions in standard form. How do you do this?contains (-4, 0.3) and (3,
1. 1 answer
2. asked by Courtney
3. 875 views
How do you Identify two pairs of congruent angles and the number of degrees in each congruent angle.
1. 1 answer
2. asked by Victoria
3. 873 views
NaOH+HNO3---> NaNO3+H2Ocalculate the number of moles of every ion present in solution after the reaction has occurred.
1. 4 answers
2. asked by Hiba
3. 866 views
Which of the following is true about Standard Deviation?a. It is the maximum value minus the minimum value b. It a range of
1. 0 answers
2. asked by Beata Chmielewska
3. 856 views
Suppose that you start with .305g of copper. compute the theoretical yiled of the phosphate in the above procedure. based on
1. 1 answer
2. asked by Missy
3. 847 views
Propane is widely usid in liquid form as a fule for barbecue grills and camp stoves for 58.5g of propane, calculate the
1. 1 answer
2. asked by Missy
3. 843 views
In the javelin throw at a track and field event, the javelin is launched at a speed of 29 m/s at an angle of 35° above the
1. 2 answers
2. asked by Xavier
3. 841 views
A person is attempting to swim directly across a river. They are able to swim at a speed of 0.500 m/s relative to the water. The
1. 1 answer
2. asked by Dazed and Confused
3. 831 views
Compared to the Sun's gravitational force on the Earth, what is the Sun's gravitational force on Jupiter.Jupiter's average
1. 2 answers
2. asked by Anonymous
3. 809 views
SrH2 +2H2O = Sr(OH)2 + 2H2You wish to calculate the mass of hydrogen gas that can be prepared from 7.74g of SrH2 and 6.45g of
1. 2 answers
2. asked by Missy
3. 807 views
what are the prime factors of a number greater than 5 but less than 13. What is the number?
1. 1 answer
2. asked by reena
3. 801 views
Your family is driving 188 miles to visit a family member, your father drives 63 miles then stops for a break, a) How many more
1. 3 answers
2. asked by Not putting it
3. 797 views
When population data are discrete and you want to compare two populations, which test is most appropriate?a. T-test b. Anderson
1. 3 answers
2. asked by Beata Chmielewska
3. 795 views
Water flows into a swimming pool at a rate of 9.59 gal/min. If the pool dimensions are 30.9 ft wide, 47.6 ft long and 13 ft
1. 1 answer
2. asked by brittney
3. 792 views

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