Questions Asked on
March 4, 2012

Chemistry
If the charge to mass ratio of a proton is 9.58 x 10^7 coulomb/kilogram and the charge is 1.60 x10^19 coulomb, what is the mass of the proton?
asked by Hannah 
calculus
Consider the curves y = x^2and y = mx, where m is some positive constant. No matter what positive constant m is, the two curves enclose a region in the first quadrant.Without using a calculator, find the positive constant m such that the area of the region
asked by John 
math
A park has the shape of a trapezoid. Two of the sides are 25 meters long. The other two sides are 40 meters and 20 meters long. What is the perimeter of the park my answer is 110 meters
asked by jack 
Chem 2
A popular buffer solution consist of carbonate (CO3 2) and hydrogen carbonate (HCO3) conjugate acidbase pair. Which, if any of the following such buffers has the highest buffer capacity? A. 0.9M CO3 2 and 0.1M HCO3 B. 0.1M CO3 2 and 0.9M HCO3 C.
asked by Debbie 
PHYSICS
Two crates , one with mass 4.00 kg and the other with 6.00 kg, sit on the frictionless surface of a frozen pond, connected by a light rope. Awoman wearing golf shoes(so she can get traction on the ice)pulls horizontally on the 6.00kg crate with a force F
asked by evelyn 
chemistry
Arrange the species O2, O2^+, O2^, and O2^2 in order of increasing OO bond length.
asked by Jimmy 
health 3 ms sue
Resistance exercises improve muscular strength in persons with such conditions as ________. A. Multiple sclerosis and stroke B. Cerebral palsy and spinal cord injuries C. Cognitive disability D. All of the above d
asked by desha 
Math
At a certain time, a verical pole 10 feet tall casts a 14foot shadow. What is the angle of elevation of the sun to the nearest degree?
asked by Valentino 
Math
A farmer plans to enclose a rectangular pasture adjacent to a river. (see figure). The pasture must contain 320,000 square meters in order to provide enough grass for the herd. What dimensions will require the least amount of fencing if no fencing is
asked by Malika 
statistics
what is the probability of observing three or fewer 6s when rolling a fair die twenty times?
asked by Chelsea 
Stats
When sampling is done for the proportion of defective items in a large shipment, where the population proportion is 0.18 and the sample size is 200, what is the probability that the sample proportion will be at least 0.20
asked by Jackie 
Early childhood literacy
"Let me in"said the pin.This is an example of: A .Assonance B .A metaphor C .Alliteration D .Personification. I chose A
asked by Ade 
geometry
A flower bed in the corner of your yard is in shape of a right triangle. The perpendicular sides of the bed measure 6 feet 8 inches and 8 feet 4 inches. Calculate the area of the flower bed.
asked by kim 
Health Care Administration
A Health Care Administrator has been hired by an, Ambulatory health care setting. What should the health care administrator expect to encounter in this type of health care setting, and how would the health care deal with issues or the different encounters
asked by Tasha 
calculus
Evaluate the definite integral:
asked by osama 
Math
A plane is flying at an altitude of 12,000 feet and is preparing to land at a nearby airport. The angle from the airport to the plane is 17. To the nearest tenth of a foot, how far is the airport from the plane?
asked by Valentino 
Chemistry
A sample of gas at 47 C and 1.03 atm occupies a volume of 2.20 L. What volume would this gas occupy at 107 C and 0.789 atm?
asked by Anna 
Astronomy
The frequency of a radio transmitter is 90 megahertz. What is its wavelength?
asked by Linda 
physics
A subway train is designed with a maximum acceleration of +0.17 m/s2, which allows for both passenger safety and comfort.
asked by Anonymous 
Chemistry
N2(g) + H2(g) > NH3(g) ; how many moles of NH3 is is produced when 0.67 moles of N2 reacts with H2?
asked by Suzanne 
Chemisty
Let's explore the efficiency of chloride ion precipitation in seperating Ag^+ from Pb^2+ in a solution. Suppose that [Pb^2+]= 0.045 mol/L and [Ag^+]= 0.084 mol/L. Calculate the chloride ion concentraion required to just start precipitation of Pb^2+ ion and
asked by Tanner 
algebra
Courtney's dog sleeps in a crate that is 40 inches wide, 30 inches tall, and 44 inches deep. What is the volume of the dog crate?
asked by Shea 
physics
What is the rms value of the electric field in a sinusoidal electromagnetic wave that has a maximum electric field of 64 V/m?
asked by jazz 
Calculus
A sporting goods store sells 100 pool tables per year. It costs $20 to store one pool table for a year, based on the average inventory on hand. It costs $40 for each delivery of pool tables. How many times per year and in what lot size should the store
asked by help 
geometry
ABCD is a quadrilateralwith vertices A(2;5),B(3;10),C(4;3) and D(1;2).then show that BD and AC bicect each at right angles at M.
asked by ntwadibe 
Math
In XYZ, what is the cosine ratio of
asked by Valentino 
Biology multiple choice question
If a randomlymating population has an established frequency of 64% for the organisms homozygous dominant for a given trait, what is the frequency of this dominant allele in the gene pool? A. .2 B. .24 C. .36 D. .8 E. .64 I think the answer is D. .8
asked by Lisa 
7
What is intensity? A. How hard a person plans to do an activity B. How easily a person is able to do an activity C. How hard a person works to do an activity D. How difficult it is for a person to complete an activity
asked by desha 
Physics
A 933 kg block is pushed on the slope of a 20 ◦ frictionless inclined plane to give it an initial speed of 50 cm/s along the slope when the block is 1.5 m from the bottom of the incline. The acceleration of gravity is 9.8 m/s 2 . 1.5 m 933 kg 20 ◦ What
asked by Ana 
algebra
select a set of equations.mary invested one amount a %10 simple invest, and a second amount at %3 interest, earning $21.72 in one year. If she would have earned $15.07. What were the two amounts?
asked by jessie 
chemistry
what is the density of a sample of 65.0 ml of automobile oil having mass of 59.82 g
asked by yvette 
English
Writeacher,I need you help to work out the questions to the following answers (You have already checked). 1) Which pattern does Robinson's education of Friday recall? What advantages does Robinson have over Friday? Robinson’s education of Friday recalls
asked by Henry 
science
A woman sues a man for the support of her child. She has type A blood, her child type O, the man type B. could the man be the fatherÉ Explain.
asked by Rebecca 
chemistry
At 25 C the following heats of reaction are known: 2CIf (g)+ O2(g) > CL2O (g) + f2O Delta H rxn= 167.4 kj/mol 2CIf3(g) + 2O2 (g)> Cl2O(g) + 3F2O(g) Delta H rxn= 341.4 2F2(g) + O2(g) > 2F2O(g) Delta H rxn= 43.4kj/mol at the temperature, use Hess's Law
asked by Court 
Finance
I'm conducting a research paper about financial crisis of 2008 and would like some input. Which is better, regulating banks or deregulating banks? Why?
asked by yuri 
algebra
Four friends together earned 128 mowing lawns. After paying an amount g for gasoline, they shared the money equally. Which equation shows the amount of each friend will receive? A. f(g) = 128  g/4 B. f(g) = 128/4g C. f(g) = 128g/4 D. f(g) = 128g4
asked by Jim 
Business Studies
I'm Studying For My Business Cycle Test and I'm finding it for hard to remember all the elements of the micro market and market environment so I was just hopeing someone could have like a catchy sentence for the elements in each environment e.g takeing the
asked by Nina 
Physics
A man with a mass of 60 kg skis down a frictionless hill that is h = 2.2 m high. At the bottom of the hill the terrain levels out. As the man reaches the horizontal section, he grabs a 20kg backpack and skis off a 2.0mhigh ledge. At what horizontal
asked by Ray 
Physics
A polevaulter of mass 60.2 kg vaults to a height of 6.1 m before dropping to thick padding placed below to cushion her fall. (a) Find the speed with which she lands. (b) If the padding brings her to a stop in a time of 0.52 s, what is the average force on
asked by Ray 
algebra
Diene claims that f(x)=3/x is its own undo rule. Is her conjecture correct?
asked by Ally 
Science
Determine the genotypes of the parents. One parent has AB blood and the other has type B, but the children, 25% are type A, 25% are type AB, and 50% have type B blood.
asked by Rebecca 
MATH (ASAP)
Jay and Tia are planning to buy snack chips. • Individual bags of chips cost $3.00 each. • Each case of chips contains 10 bags and costs $25.00. a. If Jay buys 1 case of chips, what is the cost per bag? Show or explain how you got your answer. b. How
asked by Frances 
physics
If the radius of the Earth somehow bloated to twice its size, with no changes in mass, your weight at the Earth's new surface would be ___A) onequarter.B) one eighth.C) the same.D) twice.E) half.
asked by Christie 
Chemistry
Arrange the species O2, O2^+, O2^, and O2^2 in order of increasing OO bond length.
asked by Jimmy 
physics
Which of these three produces a greater tidal effect on you right now—the moon, the Earth, or the sunA) The sun.B) The Earth.C) The moon.
asked by Christie 
General Chemistry 1
Gaseous hydrocarbons, which contain only carbon and hydrogen, are good fuels because they burn in air to generate large amounts of heat. A sample of hydrocarbon with mass 1.48 g exerts a pressure of 1.32 atm in bulb with volume 967 mL at 21.5 oC. Molar
asked by Dan 
Physical Chemistry
Calculate the value of the change in enthalpy(H) when the temperature of 1 mole of a monatomic gas is increased from 25C to 300C.
asked by J 
Physics
1) Let's continue to investigate your space vacation from last week. Your spaceship, which has a proper length of 300 m, passes near a space platform while you are moving at a relative speed of 86% the speed of light (so v=0.86*c). What is the length of
asked by ronnette 
physics question
1) Let's continue to investigate your space vacation from last week. Your spaceship, which has a proper length of 300 m, passes near a space platform while you are moving at a relative speed of 86% the speed of light (so v=0.86*c). What is the length of
asked by ronnette 
Chem
the standard molar enthalpy and entropy of the denaturation of a certain protein are 512 kj/mol and 1.60 kj/K. mol, respectively . comment on the sign s and magnitudes of these quantities, and calculate the temperature at which the process favors the
asked by Cece 
Physics
What is the time it takes a mosquito to flap its wings once if the frequency of their wing beats is 440Hz?
asked by Jim 
Physics
A./_\ B.\_/ C._ The three tanks shown above are filled with water to an equal depth. All the tanks have an equal height. Tank A has the greatest surface area at the bottom, tank B the least and tank C the middle. (Select TTrue, FFalse, GGreater than,
asked by Sasha 
PHYSICS
A hockey puck with mass 0.160 kg is at rest at the origin (X = 0)a player applies a force of 0.250 N to the puck, parallel to the x axis; he continues to apply this force until t = 2.00 s. a) What are the position and speed of the puck at t = 2.00 s? b)If
asked by evelyn 
Math
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78
asked by Anonymous 
9
What can health care providers do to help promote physical activity initiatives? A. Absolutely nothing, they do enough B. Advise patients on physical activity and how they can do it safely C. Advise patients on how to avoid physical activity D. Advise
asked by desha 
Biology
Individuals whose characteristics are wellsuited to their environment survive. Individuals whose characteristics ar not wellsuited to their environment either die or leave fewer offspring. This principle Darwin called survival of the fittest. how i
asked by Shreya 
algebra
When graphing the equations y = 2x – 2, y = 2x, and y = 2x + 3, what observation can you make about the graphs. Can you make the same observation before graphing the lines? How?
asked by algebra 3/4/12 
com/156
Part 2: Paraphrasing and Quoting Review the following passage and paraphrase the long passage in the following box. Use the reference to create an appropriate APAformatted, intext citation. Additionally, include one direct quotation. One of the most
asked by antwan 
physics
A pendulum with 1kg weight is set in motion from a position .04 m above the lowest point on the path of the weight. What is the kinetic energy of the pendulum at the lowest point?
asked by Ryley 
Internet Basics
A unique feature of which browser is an opening screen that features a different image each day with embedded links? A. Chrome B.Internet Explorer C. Bing D. Safari I chose C
asked by Brenna 
L.O
What,according to the BCEA applies with regard
asked by Lindokuhle 
health 4 sue
What is premature death? A. Dying at the average age of death for a specific population group B. Dying after the average age of death for a specific population group C. Dying earlier than the average age of death for a specific population group D. Dying
asked by desha 
Geometry
Two rectangles are similar the ratio of the lengths of their corresponding sides is 1:2 find the ratio of the peremeters of the two rectangles the find the ratio of the areas explain your answers
asked by Anonymous 
physics
The angle through which a rotating wheel has turned in time t is given by \theta = a t  b t^2+ c t^4, where \theta is in radians and t in seconds.
asked by Mr.Stupid 
statistics
Class frequency 5292 30543 3 55794 80—104 5 105129 2 130154 1 155179 1 PC =3(XMedian)/s median = L +((N/2) – CF)/f *(h) L=55 (N/2)=9 h=24 f= 4 It is says that median is 77.5, and I could not
asked by samty 
Maths 10th grade
1The roots of x2  6x + m  3=0 are x1 and x2.If 2x1  3x2= 2 is given, find m? 2Given the inequalities x2 ______ < 0 and x2  4x  5
asked by Denise 
algebra
a pond surface has a diameter of 200 ft. around it is a walkway of 10 ft. what would be the area of the walkway?
asked by karleen 
Chemistry(Please check, thank you!)
I completed a lab to find the determination of Kc. I have to find the concentrations of reactants at equilibrium using an ICE table. The equation that were are using is Fe^3+(aq) + SCN^(aq) > Fe(SCN)^2+(aq) I have to create 5 ICE tables because we used 5
asked by Hannah 
Chemistry
What concentration of chloride ion is required to precipitate 99.9% of the lead ion from a solution with [Pb^2+]= 0.045 mol/L ?
asked by Tanner 
8th grade math
2x=y+1/2 how do you turn this equation into an equation that is ax+by=c? Please help and explain. Thank you.
asked by saranghae12 
Algebra 1
In 1993, the life expectancy of males in a certain country was 67.2 years. In 1999, it was 70.3 years. Let E represent the life expectancy in year t and let t represent the number of years since 1993. The linear function E(t) that fits the data is E(t)=_t
asked by Chasity 
Calculus
The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400). a) Determine the legal speed speed that will maximize the fuel efficiency if the speed limit is 50 km/h. The answer is 50 km/h but my teacher said
asked by Jake 
geometry
you want to buy a pickup truck and are interested in one with a large carrying capacity. One model features a rectangular prismshaped cargo space, measuring 6ft by 10ft by 2ft;another has a space with dimensions 5ft by 11ft by 3ft. Which truck provides
asked by kim 
5th Grade Math
I'm trying to figure out what the answer would be to this question... a single serving container of yogurt has a capacity of 8 ____. My choices are oz,lb, T,fl oz, c, pt, qt,or gal. I was originally thinking oz but that is weight and not capacity. Then I
asked by Brandi 
Chemistry
Why can a buffer be created by the addition of sodium hydroxide to acetic acid, but not from the addition of sodium hydroxide to hydrochloric acid?
asked by Lindsey 
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.
asked by Sarah 
calculus
If u = log(r), where r^2 = (xa)^2 + (yb)^2, and (x1) and (yb) are not zero simultaneously, show that d^2u/dx^2 + d^2u/dy^2 = 0. I first used some of the properties of log and made u = 1/2 * log((xa)^2 + (yb)^2) Then made u = 1/2 * ln((xa)^2 +
asked by Bryant 
Hearne High
Find the exact value of each of the other 5 trigonometric functions for the angle of theta (without finding theta) when cos theta is 3/5
asked by Olivia 
math, algebra
Tina is trying to drop a water balloon from her balcony onto a rectangular raft in the pool below. The pool is 25 feet long and 15 feet wide. The raft is 6 feet long and 2 feet wide. What is the probability that Tina will hit the raft with the water
asked by Willow 
volume,mass,weight
if you travelled to a planet that had twice the force of gravity of earth and you have taken a small mass that is 1kg what is the mass weight and volume of the 1kg object on the new planet compared to earth
asked by dw 
Math/116 week seven
solve by the substitution method. 2m+n=1 m9n=10
asked by Renee 
MGT/350
Are there differences in the tools and techniques between big and small companies?
asked by anita 
math HELP PLZ DO MINE
There are 64 kids in the swimming pool there are 8 more girls than boys How many Boys are there?
asked by gabby 
Chemistry II
For the titration of 50.00 mL of 0.106 M NH3 with 0.225 M HCl, calculate (A) the initial pH and when the pH neutralization is (B) 25.0% complete (C) 50.0% complete (D) 100.0% complete
asked by Rosi 
Chemistry
Write the net ionic equation for the precipitation reaction between ammonium sulfide and cadmium nitrate.
asked by Bria 
physics
Two charged particles of equal magnitude (+Q and −Q) are fixed at opposite corners of a square that lies in a plane (see figure below). A test charge +q is placed at a third corner. +Q +q −Q What is the direction of the force on the test charge due to
asked by Monica 
physics
The relative humidity is 55% on a day when the temperature is 30.0°C. Using the graph below, determine the number of moles of water vapor per cubic meter of air
asked by Katy 
chemistry
How many grams of water are required to dissolve 27.8g of NH4(NO3)(MM=80.05 g/mol)to make a 0.500M solution?
asked by Carrie 
Biology
I'm confused on the rule of multiplication and the rule of addition. When do I use each to determine the probability of a genetic trait being inherited.
asked by Peter 
physics
A fuzzy die (m = 0.2 kg) hangs from the ceiling of a car. When the car accelerates forward along a horizontal road, the die swings backward so the the string supporting it makes an angle of 4o with the vertical. What is the acceleration of the car?
asked by Anonymous 
physics
A 5 kg magnet exerts a constant force of 3 N on a 0.25 kg magnet. What force will the smaller magnet exert on the larger magnet?
asked by Anonymous 
physics
A 5 kg magnet exerts a constant force of 3 N on a 0.25 kg magnet. What force will the smaller magnet exert on the larger magnet?
asked by Anonymous 
physics
A 5 kg magnet exerts a constant force of 3 N on a 0.25 kg magnet. What force will the smaller magnet exert on the larger magnet?
asked by Anonymous 
English
Thank you, Writeacher. I left out these other sentences. Can you please check them? I left out these other sentences. 1)Macbeth urges her husband to put on his nightgown and pretend he has just awakened. 2)She wanted to defeat her main rival: Spain. 3)She
asked by Henry 
PhysicsNewtons Second Law
A high diver of mass 60.0 kg steps off a board 10.0 m above the water and falls vertical to the water, starting from rest. If her downward motion is stopped 1.80 s after her feet first touch the water, what average upward force did the water exert on her?
asked by Anonymous 
Physics Help
What is the energy stored in the inductor shown in the figure after the switch has been closed for a very long time? Take V = 15 V, R = 600 §Ù and L = 10 mH.
asked by Anon14 
Physics
The force exerted by the wind on a sailboat is approximately perpendicular to the sail and proportional to the component of the wind velocity perpendicular to the sail. For the 792kg sailboat shown in the figure below, the force exerted by the wind on the
asked by Anonymous 
math
If a student's percentile rank in a class of 400 students is 87, find the student's class rank.
asked by Anonymous 
calculus
A plane flying horizontally at an altitude of 1 mi and a speed of 500 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 2 mi away from the station. I drew a diagram and
asked by Daniel 
APUSH help reqired ASAP
Describe the growth in America's postwar economy. The answer must include the following terms. 1) Taft Hartley Act. 2) GI BillofRights. 3) Suburbs. 4) Levittown. 5) Sunbelt.
asked by Akia 
math
There is a lap swimming pool is a rectangle with the depth of 4.5 feet. If the water is doubled is it the width, length, and depth doubled?
asked by Anonymous 
health
Regular physical activity appears to reduce symptoms of ________ for children and adolescents. A. Anxiety and depression B. Low selfesteem C. Identity or role confusion D. All of the above i goty c
asked by desha 
college algebra
use properties of logarithms to find the exact value of the expression. sqrtlog81 3
asked by Tammy 
8th grade math
How do you turn these equation into a standard form? this is the standard form: ax+by=c here are the following equations: 2x = y + 1/2 y  2 = 1/4x + 1 3y + 3 = 6x  15 Please help and explain. Thank you.
asked by saranghae12 
calculus
F(x)= ((x^2+2x)/(x^21) )^3 *(3x^2 – 2x + 4)^5
asked by renal 
8th grade math
how do you make an equation that is parallel to another equation? how do you make an equation that is perpendicular to another equation? please help and explain. Thank you.
asked by saranghae12 
Calculus please help
A sporting goods store sells 100 pool tables per year. It costs $20 to store one pool table for a year, based on the average inventory on hand. It costs $40 for each delivery of pool tables. How many times per year and in what lot size should the store
asked by Casey 
physics
Mars Rover When the Mars rover was deployed on the surface of Mars in July 1997, radio signals took about 12 min to travel from Earth to the rover.How far was Mars from Earth at that time?
asked by jazz 
Legal Environment of Bus
Ethics Question (Legal Environ of Bus)? Various industries have lobbied for legislative restrictions on tort liability. The nuclear power industry has long been protected by a statute that limits its upperdollar liability in the event of a serious
asked by shirley 
chemistry
Arrange the species O2, O2^+, O2^, and O2^2 in order of increasing OO bond length.
asked by Lucas 
English  Native speakers
Question: Which 2 answers are correct? Which is not and why? 1. Sorry, I can't. I'm seeing my grandmother. 2.Sorry, I can't. I'm going to see my grandmother. 3. Sorry, I can't. I'll see my grandmother.
asked by Mark 
SUE PLEASE HELP
An example of a muscle strengthening activity includes ___________. A. Zumba fitness B. Jumping jacks C. Aerobics classes D. Lifting weights IT GOT B
asked by desha 
chem
calculate the delta Hf of c6h12o6 (s) from the following data: Delta H combustion= 2816 kj/mol delta Hf of Co2 = 393.5 kj/mol delta Hf= of H2 O= 285.9kj/mol
asked by Cece 
1
Which age groups benefit from physical activity? A. Children B. Middle aged adults C. Older adults D. All of the above d
asked by desha 
physics
A physics student playing with an air hockey table (a frictionless surface) finds that if she gives the puck a velocity of 5.30 m/s along the length (2.80 m) of the table at one end, by the time it has reached the other end the puck has drifted 5.19 cm to
asked by Nick 
2
Exercise can help prevent _________. A. Heart disease B. Colorectal cancer C. Type 2 diabetes D. All of the above d
asked by desha 
chemistry
the thermochemical equation for th edissocation of hydrogen gas into atoms may be written : h2> 2H delta H 1824.2 what is the ration of the energy yield on combustion of hydrogen atoms to steam to yield ion combustion of an equal mass of hydrogen
asked by Court 
Chemistry(Urgent, please check)
I completed a lab to find the determination of Kc. I have to find the concentrations of reactants at equilibrium using an ICE table. The equation that were are using is Fe^3+(aq) + SCN^(aq) > Fe(SCN)^2+(aq) I have to create 5 ICE tables because we used 5
asked by Hannah 
math
Evaluate the expressions: 15*(80 +170)/5^2= 160/2^4+2^775=
asked by Francie 
3
Resistance exercises improve muscular strength in persons with such conditions as ________. A. Multiple sclerosis and stroke B. Cerebral palsy and spinal cord injuries C. Cognitive disability D. All of the above d
asked by desha 
algebra
M times 2/3 equals 1  13/15
asked by joe 
physics
work done by force is given w=f.s.show that w=delta k?
asked by kirti 
chemistry
Suppose you run a total of 4.35 miles in 58.75 minutes. If you want to determine your average running speed in units of km/hr, how many significant digits will your final answer have?
asked by Anonymous 
Calculus 3
Find the limit, if it exists, or show that the limit does not exist. lim of x+y/y^2x^2 as (x,y) approaches the point (1,1).
asked by Anonymous 
Calculus
Could someone help me with these questions. If an equation s(t)=t^3  2t^2 + 1 describes an object's motion in metres, at what time t, in seconds, will the object be stationary? a) 1s b) 0s and 4/3s c) 0s d) 4/3s  A
asked by Jessica 
Chemistry
There are _______ oxygen ions in 1 mole of Na2O. A. 6.0 x 10^23 O2 ions B. 1.2 x 10^24 O2 ions C. 3.0 x 10^23 ions D. None of these
asked by Ashley 
Chemistry
In 1 mole of CaCl2 there are ____ moles of chloride ions. A. 1 B. 2 C. 0.5 D. None of these
asked by Ashley 
Chemistry
How many moles of water are in 1.0g of water? (Give number only in space below to the correct number of significant figures)
asked by Ashley 
Highline Community College
Suppose that the marginal revenue for a product is given by the following, where x is the number of units and revenue is in dollars. MR = −28 (2x + 2)2 + 28 Find the total revenue.
asked by Preet 
4
What is premature death? A. Dying at the average age of death for a specific population group B. Dying after the average age of death for a specific population group C. Dying earlier than the average age of death for a specific population group D. Dying
asked by desha 
Statistics
The average age of vehicles registered in the united states is 96 months, with a standard deviation of 16 months. If a random sample of 36 vehicles is selected, find the probability that the mean of their ages is between 90 and 100 months. Provide four
asked by Darren 
5
What can architects do to help promote physical activity initiatives? A. Construct buildings with active options such as, access to stairs B. Create buildings that do not allow handicap access C. Avoid providing efficient methods of walking within and
asked by desha 
correct a sentence
I asked Shirley If she would ever have any problems, she would call us imediently
asked by bety 
Physical Science
An athlete wants to finish a 5K face in 25 minutes. If she runs at a constant speed of 3.4 m/s, will she meet her goal?
asked by Emma 
english
im doing an essay on why success can be bad or change someobody for the worst & im using two celebrity examples. my first example is lindsay lohan. whats another example of a celebrity that has changed for the worst because or success, or a celebrity that
asked by lisa 
statistics
the correlation between two tests given to 100 students in the junior clas is .70 the mean for the first test was 125 with standard deviation 20 the mean of the second test is 80 with standard devation 10 a student took the first test and scored 100. what
asked by Anonymous 
geometry
you want to buy a pickup truck and are interested in one with a large carrying capacity. One model features a rectangular prismshaped cargo space, measuring 6ft by 10ft by 2ft;another has a space with dimensions 5ft by 11ft by 3ft. Which truck provides
asked by kim 
Piz Help Anyone !!!!!!!!!!!!!!!!!
Is women's history month capitalization?
asked by Zack 
Physics
How do i determine the mass of ice initially in the calorimeter when dry saturated steam is passed into 250g of a mixture of ice and water in a calorimeter of thermal capacity 45J/K when all the ice has just melted,and the mass of the content in the
asked by Emmanuel 
6
The best physical activity is one that is ________. A. Enjoyable enough to bring along a snack B. Enjoyable enough to be lulled to sleep C. Enjoyable enough to do regularly D. All of the above c
asked by desha 
statistics
Here are some statistics using GSS 2008 data: RACE OF RESPONDENT n 2023 Mean 1.32 Median 1.00 Mode 1.00 Standard deviation 0.631 Variance 0.399 Explain what is wrong with this output.
asked by stewie 
Math
Find the point on the graph of the function that is closest to the given point. Function Point f(x) = x^2 (16, 1/2) (x, y) = ( ) ?
asked by Malika 
calculus
Find the intervals on which the f(x)= cos^2x is concave up and concave down.
asked by amir 
English
Write a passage using rhetorical device on aperson,idea or ideology in about 300words
asked by Paden 
Physics
Calculate the gravitational force between two identical 100kg masses separated by 1 m.
asked by Mina 
college algebra
solve the equation below. Please show all work. log3(x/29)=4
asked by Tammy 
english
Use the following words in sentences as directet:1rain(verb)2water(verb)3light(adjective)4trip(noun)5air(noun)
asked by Paden 
ALG WORD PROBLEM
Loan Mixture: A student takes out a total of $5000 in three loans: one subsidized, one unsubsidized, and one from the parents of the student. The subsidized loan is $200 more than the combined total of the unsubsidized and parent loans. The unsubsidized
asked by HELP NEEDED 
geography
how the hydrological cycle takes place
asked by ndivhoniswani 
Physics
A ball is throwing downward with an initial velocity of 10 m/sec. If the final velocity is 20 m/s, what is the time?
asked by Mina 
Physics
Two vectors are at right angle to each other as shown. Find the resultant vector (the sum of the two vectors).
asked by Mina 
golf view
Explain how the graph of sin2 theta relates to y=sin theta
asked by lawrence 
Physics
A Ferris Wheel with a radius of 15 meter makes one complete rotation every 10 seconds.
asked by Mina 
physics
If the height of the water slide in the figure below is h1 = 1.55 m and h2 = 1.35 m, and the person's initial speed at point A is 0.593 m/s, at what location does the swimmer splash down in the pool?
asked by Ashley 
college algebra
solve the logarithmic equation. Please show all work. log5x+log5(x3)=log5(x+5)
asked by Tammy 
English
Thank you, Writeacher. Here are some other sentences I need you to check. 1) Your paragraphs show a poor knowledge of grammar as well as of word accuracy (correctness, property) and cohesion. 2)The choice of tenses is often wrong since you mixed present
asked by Henry 
Physics
At a given instant in time, a 10kg rock is observed to be falling with an acceleration of 7.0 m/s2. What is the magnitude of the force of air resistance acting upon the rock at this instant?
asked by Jermaine 
Physics
For a rider with a mass of 50 kg, what is the magnitude of the centripetal force required to keep that rider moving in a circle? Is the weight of the rider large enough to provide this centripetal force at the top of the cycle?
asked by Jermaine 
chemistry
How many grams of ice at 11.2 degrees C can be completely converted to liquid at 29.8 degrees C if the available heat for this process is 4.12×10^3 kJ? For ice, use a specific heat of 2.01 J/(g*degrees C) and delta H_fus = 6.01 kJ/mol.
asked by Lauren 
chemistry
A buffer is prepared by adding 300.0 mL of M NaOH to 400.0 ML of 2.0 M CH3COOH. What is the pH of this buffer? ks=1.8X10^5
asked by Daniel 
hindi
what type of an introduction and completion will be good for an essay?
asked by srisha 
English
I included the mistakes as well as the corrections. Can you please have a look at them, Writeacher? Thank you. 1) "Elizabeth I applied a strong policy and she could repulse the Spanish Armada." Elizabeth I adopoted a vigorous foreign policy, which enabled
asked by Henry 
reimbursement methodologie
you've been hired as the inpatient coderin the hospital's health information management department.Explain how your job will affect hospital billing and reimbursement. 2.You've just taken a job as a billing specialist,Describe the stepby step process that
asked by anah 
english
I need help writing an illustration paragraph on the topic: saying no. I have to include the following devices 1 acyndeton, 1 polysyndeton, 2 interrupted movement, 2 parallel, 1 freighttrain
asked by Nina 
English
I did some of the corrections myself. I find it really hard to check all the grammar mistakes. Could you please help me, Writeacher? Thank you. 1) Lady Macbeth doesn't show typical female character because she is the driving force of the play. 2) She
asked by Henry 
test
If you used the rule (1/2x,1/2y)to to transform the original figure,how would the angles and sidelengths compare.
asked by elbert 
English Literature
Can I please get help on the mood and atmosphere created by Allen Curnow in his poem "Continuum"? Thanks.
asked by Barbie 
calculus
Find the first derivative for, (e^(x)+ e^(x))^2
asked by bill 
business
Which economic system is the best solution to handling a crisis of epic proportion
asked by Brenda 
calculus
find the volume of the solid of revolution obtained by revolving the region bounded above by the curve y=f(x) = √16x^2 and below by the curve y=g(x) from x=0 to x=x√2 about the xaxis
asked by help pleaseee 
math
Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 7x3 + 6x2 – 6x – 3. The shop estimates their costs for that quarter to be given by 6x2 – 9x + 9. For the second quarter, find and simplify a
asked by Sparrow 
Calculus
Could someone help me with these questions. If an equation s(t)=t^3  2t^2 + 1 describes an object's motion in metres, at what time t, in seconds, will the object be stationary? a) 1s b) 0s and 4/3s c) 0s d) 4/3s  A
asked by Jessica 
Administrative Justice
What is a good way to start a essay for admninstrative justice class?
asked by Henry H 
Chemistry
What is the HendersonHasselbach equation? Use the equation to determine the ratio of [A] to [HA] necessary to create an ammonium chloride/ammonia buffer with a pH of 8.50. Describe how to make this buffer given a solution of 0.1 M NH3 (aq) and a bottle
asked by Lindsey 
Math
Determine the representation in the frequency domain function f (t) below, through the table of Laplace transforms: f (t) = 6e ^ (0,2+3t ) f (t) = e^t sen(3t)
asked by SILVA 
math
If you used the rule (1/2x,1/2y)to to transform the original figure,how would the angles compare. How would the side lengths compare.
asked by elbert 
Algebra
The vertices of a kite have coordinates (14,2), (10,4), (6,2), and (10,y). If the kite has an area of 64 square units, what is the value of y?
asked by Curt 
physics
Ricardo and Jane are standing under a tree in the middle of a pasture. An argument ensues, and they walk away in different directions. Ricardo walks 22.0 in a direction 60.0 west of north. Jane walks 10.0 in a direction 30.0 south of west. They then stop
asked by aisha 
Math
A group of students is entering a contest to win $1000. The students plan to divide the money equally. Construct a graph that best describes the relationship between the number of students in the group and the amount of prize money each student wims?
asked by Gus 
Physics
A Ferris wheel has a radius of 14 m. What period of rotation would give the occupants a feeling of "weightlessness" at the top? __s
asked by Sam 
Math
Simplify: 5+ 1/3 x 1/3 x 1/3(1/9+1/9)
asked by Sheilah 
biology
If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms?
asked by alex 
Math jss 2
Please draw a number line from 7 to+7 on the line and mark the pointr a(6)b(5)c(4)d(6)e(5)
asked by Anonymous 
science
write a vocabulary glossary linked to sound.
asked by kina 
Math
Using the table Laplace transform, determine the function f (t) of the following functions F (s). F(s)= 1/s^2 + 3s/s^2+9 F(s)= 6/s^2 + 10s+29 F(s)= 1/2s + 8/s^2+4s+8  3/s^2
asked by SILVA 
Physics
A major league pitcher can throw a baseball in excess of 41.3 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 16.1 m away from the point of release?
asked by Anonymous 
Physics
A rescue airplane is flying horizontally at a height of 3.0 km with a speed 272 m/s when it releases a package of emergency food supplies. How far horizontally in meters does the package travel while it falls before it hits the ground?
asked by Anonymous 
writing paper
I need to add a cover page to my writing assinment. I can not find any information on what I include in the cover page. This is for Penn Foster College.
asked by maria 
algebra
for a measurement of 7.3 mm, how small could the actual length be? A. 6.8mm B. 7.15mm C. 7.25mm D. 7.4mm
asked by Jim 
precalculus
find (a) the compound amount and (b) the compound interest for the given investment and annual rate. a. $5000 for 20 years at 5% compounded annually b. $700 for 15 years at 7% compounded semiannually.
asked by romain 
precalculus
Given that the radioactive decay equation is q = 1250 e0.05t, if t is in months, the amount of milligram present after 4½ year is?
asked by romain 
statistics
what is the critical value t that satisfies the condition that the t distribution with 8 degrees of freedom has probability .10 to the right of t?
asked by Anonymous 
chem
calculate the standard enthalpy change for each of the following reactions. N2O4(g)+4H2(g)=N2(g)+4H2O(g)
asked by karen 
Math
By the method of the fractions partial determine the function f (t) of the following functions F (s). F(s)= s^2+7s+12/(s+2)(s+4)(s+6) F(s)= (s+3)(s+6)/s(s^2+10s+24) F(s)= 5(s+2)^2/s(s+1)^3 F(s)= s+6/s(s+1)^2 F(s)= 27/(s+1)^3(s+4)
asked by SILVA 
Physics
The position of a particle in meters is given by x =3.6t2  2.4t3 , where t is time in seconds. A) Find the two times when the velocity is zero. B) Calculate the position for each of those times.
asked by Vickie 
math
how to solve the set of system equations 6x  y  2 = 0 dan 3x  2y + 5 = 0
asked by barry 
Early childhood literacy
What do preschoolers use private speech for?
asked by Ade 
Internet Basics
An online scam in which an email is sent to you by someone masquerading as a reppresentative of your bank asking for information is an example of A. Social networking B. phishing C. malware D. applets The answer is B
asked by Brenna 
Physics
A lukewarm bottle containing 800 grams of water is placed in a refrigerator. How many calories of heat must be removed from the water to chill its temperature from 55 C to 4 C?
asked by Tracy 
biology
Question 18 If a child was allergic to a substance scratched onto their skin, the area turned red and swollen within about 10 minutes. Which of the following would cause these symptoms? Answer Release of interleukin10 Recruitment of B cells Release of
asked by alex 
Physics
Which of the following statatements is correct? a. Thermos bottles keep food warm by combating heat loss through convection. b. A thick quilt is an example of an isulator with a low R value c. An object that is cool to the touch at room temperature is a
asked by Tracy 
Life orintation
Identify and describe one environmental problem that causes ill health,accidents,crises and disasters within your community or any other community within south africa or globally.
asked by Anonymous 
geometry
The diameter of Earth is 12,742 kilometers; the diameter of the moon is 3476 kilometers. a. If you flew around Earth by following the equator at a height of 10 kilometers, how many trips around the Moon could you take in the same amount of time, at the
asked by kim 
physics
a ball of radius 5cm is hung against the wall with an 8cm rope from one side of the ball.it has mass of 60newtons.fined the tension in the rope and the reaction at the wall.
asked by Anonymous 
Physics
Lake Erie contains about 4.8 x 10^17 grams of fresh water. Assume that the lake has frozen solid and that the ice starts off at 3 C. How much energy would the lake need to absorb from the Sun to cause it to evaporate completely?
asked by Tracy 
Sociological
Using the sociological perspectives: functionalism, conflict, symbolic interactionism and feminism, show how Facebook has made an impact on today's technologicallyadvanced society.
asked by Nancy 
English
I left out the following sentences. I did some corrections myself. I hope you can help me. Thank you very much. 1)All revenge tragedies derive from the Greeks, then came Seneca who set the rules for all revenge tragedies written in the Elizabethan Age. 2)
asked by Henry 
Administrative Justice
what do probation officers do during trial and pretrial processes?
asked by Alexis 
Chemistry
How many deciliters of carbon dioxde are produced when 0.38L SO2 is formed?
asked by Lety 
Ela Help!!!!!!!!!!!!!!!!!!!!!!!
Which sentence is better? Warren had a newspaper business and was one of the United States Senate. Warren had a newspaper business and he was one of the United States Senate.
asked by Zack 
math
How many tokens of “the“ did Adam produce at stage 1?______22_______ How many tokens, in general, did Adam produce at stage 1? _7437__________ What percentage of Adam's tokens did “the“ make up at stage 1? Hi, i figured out how to calculate the
asked by michelle 
Urban Anthropology
Can anyone tell me what an architectural bidirectional relationship is with regards to urban anthropology?
asked by Rick 
calculus
evaluate the improper integral whenever it is convergent ∫0,00 1/(4x)^(3/2) dx
asked by help please. 
chemistry
DrBob222 No. 0.30 isn't the correct answer either. I'm going to ask my prof about it tomorrow.
asked by Kiana 
calculus
use the trapezoidal and simpson's rule to approximate the value of the definite integral ∫2,1 ln xdx; n=4 compare your result with the exact value of the integral
asked by maga 
logarithms
how to wirte 3log(s)4log(c)+2log(t4) as a single logarithm. Thanks
asked by vero 
6th Grade Math
Simon went to the store to buy new school supplies. Simon spent 1/4 of his money on pencils and paper and 1/2 of his money on a backpack. If Simon has $12.50 leftover, how much did the backpack cost?
asked by Grace 
ap chemistry
how do you do an ice table?
asked by jill 
math/ geometry
1. Determine the truth value of the following statement: Rome is a city in France or all numbers are divisible by 1. True False
asked by diena 
Physics
A 10 kg block rests on a frictionless table and is whirled in a circle and kept in a radius of 1.6 m by a rope attached to a peg. What is the tension in the rope if the block has a linear speed of 18 m/s? __N
asked by Sam 
trig
Verify the trigonometric identity. Please show all steps. tanxcotx/tanx+cotx=sin^2xcos^2x
asked by garrett 
spanish
what time do restaurants open and close in Mexico? I'm making a menu for a restaurant in Mexico and I need to know what time it opens and closes. What is the usual time
asked by jocelyn 
Engish
I need to find the statment of life in the call of the wild by jack london
asked by Jake 
math
a flagpole cast a shadow that is 26ft long. At the same time, a yardstick cast a shadow that is 4ft long. How tall is the flagpole
asked by nick 
physics
A rescue airplane is flying horizontally at a height of 3.0 km with a speed 272 m/s when it releases a package of emergency food supplies. How far horizontally in meters does the package travel while it falls before it hits the ground?
asked by Anonymous 
physics
A major league pitcher can throw a baseball in excess of 41.3 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches the catcher who is 16.1 m away from the point of release?
asked by Anonymous 
calculus
show that an integral of the form ∫00,a e^(px) dx is convergent if p>0 and divergent if p
asked by help pleaseee 
physics
Why is your weight not onequarter as much when you climb to the top of a twice as tall tree? A) Because, quite simply, of Newton's law of action and reaction.B) Because parts of the tree itself gravitationally attract you.C) But it is, in accord with the
asked by Christie 
English
These are other sentences I need you to check, Writeacher. Thank you. 1) Lady Macbeth was tired to be (better: of being ) just Lady Macbeth because she really wanted to be the queen (queen). 2) "Lady Macbeth is a very strong character because she ignored
asked by Henry 
physics
Two horse pull horizontally on ropes attached to a stump. The two forces f1 and f2 that they apply to the stump are such that the net(RESULTANT) force R has a magnitude equal to that of F and makes an angle of 90 with F1. Let F1=1300 N and R =1300 N also.
asked by evelyn 
trig
if cot(x10)=tan(4x) what does x equal?
asked by Ali 
statistics
John drives to work each morning and the trip takes an average of µ = 38 minutes. The distribution of driving times is approximately normal with a standard deviation of ó = 5 minutes. For a randomly selected morning, what is the probability that John’s
asked by gina 
chemistry
1)100ml sample of solution that is 0.2m in both Naf and Hf has 4.0 ml of 1.0m hcl added to it. calculate the ph change of this soultion .ka =7.2*10^4 2)40 ml of 0.32m benzoic acid if titrated with 60 ml of 0.2 m naoh. clacilate the ph of the resulting
asked by Anonymous 
math
if i have a 34 foot vehicle that needs to enter a building throw a 15 foot door and there is a slope of 2 feet to 0 feet what is the distance the slope must have to allow the vehicle to enter
asked by Anonymous 
Biology
my sister still be sick so i still helping her post questions. i write paragraph from her textbook that go with question. Ultimately, Darwin recognized in nature a process that operates in a manner similar to the way artifical selection worked on farms and
asked by Mohammad 
algebra
solve by using the square root method: (5y+4)^2+100=0
asked by H 
math
a bag contains one red and one white marble.A second bag contains two red marbles and a white one.How many different outcomes are possible if a marble is picked from each bag?The marbles are replaces each time.PLS help :)
asked by zain 
Probability
Thank you for the explanation MathMate! Would the answer to this question be A? Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that
asked by Student 
chemistry
True or false? Constitutional isomers and conformations have the same molecular formula.
asked by krystal 
astronomy
What is the tempertaure range for objects whose wavelength at maximum falls within the visible spectrum, 400 to 700 nm?
asked by Alex 
life orientation
What according to the basic conitions of employment act applies with regard to the contraventions that you have identified?
asked by moima 
math
12 students wanted to go on a field trip. that was 3/4 of the class. how many students are in the class
asked by joe 
SciencePhysics
A pendulum with 1kg weight is set in motion from a position .04 m above the lowest point on the path of the weight. What is the kinetic energy of the pendulum at the lowest point?
asked by Ryley 
life orientation
What unethical behaviour is taking place in the case study? Name two
asked by moima 
Humanities/World Literature
Why, according to the Quran, does God cause Israel to wander the desert for 40 years?
asked by Sonya 
government
Explain your perception of the advantages and disadvantages of the American bicameral system.
asked by lisa 
Humanities/World Literature
1.Why does the demon collect her lovers' rings in _1001 Nights_? 2.What is the purpose of Shahryar and Shahzaman's journey in _1001 Nights_?
asked by Sonya 
Physics
If a ball were to fall off a 180cm table,how fast would it be going halfway to the ground?
asked by Anonymous 
Mat/117 App F
1. Suppose you are an event coordinator for a large performance theater. One of the hottest new Broadway musicals has started to tour and your city is the first stop on the tour. You need to supply information about projected ticket sales to the box office
asked by Rose 
maths
If I have a 3 didgit number  a 3 didgit number = a 3 didgit number but the numbers used are 19 and only can be used once what are the numbers? please help me i have been trying all week
asked by olivia 
Mat/117 Concept
• If you are looking at a graph of a quadratic equation, how do you determine where the solutions are? Please provide and example.
asked by Rose 
Astronomy
What is the Lorentz factor for a spaceship traveling at 0.5c?
asked by Linda 
chemsitry
1)100ml sample of solution that is 0.2M in both Naf and Hf has 4.0 ml of 1.0M hcl added to it. calculate the ph change of this soultion .ka =7.2*10^4 2)40 ml of 0.32M benzoic acid if titrated with 60 ml of 0.2 M naoh. clacilate the ph of the resulting
asked by Anonymous 
math(mechanics 1)
a car traveling on a straight road accelerates uniformly at a meter per second square from its initial speed of 20 meter per second until it reaches a speed of 30 meter per second. the car travels at this speed for 600 meter and then decelerates uniformly
asked by maha 
chemistry
"Following the reaction of zinc with hydrochloric acid, a secondary reaction can occur if a product of the first reaction is ignited. Write the complete reactions for both reactions." "If 2.75g zinc with 0.15 moles HCL, how much flammable product can be
asked by Brianna 
Math
What is the final step to determine the product of 3/8 and 4/5?
asked by Jon 
Biology
two negative effect of direct artificial selection?
asked by Astrid 
science
compare&contrast warm front &cold front
asked by esha 
Chem
determine the final temperature of a system after 100.0g of zinc ( specific heat .3876 J/g c) at 95.0 C is immersed into 50.0 g of water at 15.C
asked by Cece 
math
Emory is mounting 3 shelves of 12 3/4 in apart on a wall. If each board is 3/4 in. thick, what is the total vertical space occupied by the set of shelves?
asked by lori 
astronomy
How fast must a spacecraft travel to reach the center of our Galaxy (26,000 ly away) in 100 tears "ship time"?
asked by Linda 
chemistry
3. Complete the following word equation and write the balanced formula equations: a. Zinc(s) + iodine(g) b. Hydrogen peroxide(l) c. Magnesium(s) + lead(IV) nitrate(aq)
asked by Anonymous 
chemistry
1. Heat can initiate reaction as well as be a product of chemical reactions. Cite the specific sample from the experiment that show heat acting in the manner 2. Aluminum chloride was a product in step 6. How could you instruct your lab partner to recover
asked by jhong 
physics
how much force can be applied to the top block without the blocks slipping apart
asked by Anonymous 
physics
how much force can be applied to the top block without the blocks slipping apart
asked by Anonymous 
math
Show me the fully formula for 3x+4y=10 2x+y=5 simultaneously solve x and y
asked by Patricia 
Math
At a certain time a verical pole 10 feet tall casts a 14foot shadow. What is the angle of elevation of the sun to the nearest degree?
asked by Valentino 
math
find the circumfrence of a compact disk having a diameter of 4 and 3 4ourths in.
asked by efDVV 
Math
A steamer goes 91 mi up a river in 6.5 h. The return trip is scheduled for 3.5 h. What is the rate of the water?
asked by Lillian 
6th grade science
How do the surface proteins on a virus help it to invade a host cell?
asked by Bob 
Math
In Triangle XYZ, what is the cosine ratio of
asked by Valentino 
math / geometry
Write the argument below in symbols to determine whether it is valid or invalid. State a reason for your conclusion. Specify the p and q you used. Submit your full detailed solution to the dropbox. If the gazebo is made of wood, then the vine is growing on
asked by Steve 
physics
Placing a tube, with a radius of .30 cm, vertically into a barrel with a radius of 21 cm it was found that when the barrel was filled with water and the tube filled to 12 m the barrel burst. Calculate the mass of water in the tube and the net force exerted
asked by Yew Florence 
science
if you add 100mL of water at 20 degree celisus to 200mL of water at 20 degree celisus what does the thermal energy do for the combined mixture?
asked by Colton 
chemistry
True or false? Constitutional isomers and conformations have the same molecular formula.
asked by krystal 
Reading
How do I Calculate the final temperature of 299ml of water initially at 31 degrees upon absorption of 19kj of heat?
asked by Denise 
physics
Consider the lowspeed flight of the Space Shuttle as it is nearing a landing. If the air pressure and temperature of the shuttle are 1.2 atm and 300 K, respectively, what is the air density? Note: 1 atm = 101325 N/m^2. Hint: Use ideal gas law!
asked by oris 
chemistry
Choose the type of shape that best matches to CH4. Linear Trigonal planar Bent Tetrahedral Pyramidal
asked by krystal 
chemistry
a 205 mg sample of diprotic acid is dissolved in enough water to make 250 ml of solution. The pH of this solution is 2.15. A saturated solution of calcium hyrdoxide (Ksp=1.3*10^6) is prepared by adding excess calcium hydroxide to water and then removing
asked by cat 
algebra
Solve using the elimination method. Show your work. If the system has no solution or an infinite number of solutions, state this. 8x – 2y = 28 3x + 5y = 47
asked by Anonymous 
10 ms sue
How can communities and government help promote physical activity initiatives? A. Raise taxes B. Lower taxes C. Create walking trails D. Eliminate sidewalks i got c
asked by desha 
11 ms sue
What is bone strengthening? A. Activities that produce a force on the bones that promote bone growth and strength B. Activities that produce greater elasticity of joints C. Activities that heal injuries and diseases associated with the bones D. None of the
asked by desha 
Probability
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78
asked by Student 
physics
A 0.125 kg cart rolls along a metal track with a kinetic energy of 0.25 J. How high up an inclined metal track will the cart roll?
asked by Ryley 
Physics
When standing erect a person's weight is supported chiefly by the larger of the two leg bones. Assuming this bone to be a hollow cylinder of 2.5 cm internal diameter and 3.5 cm external diameter, what is the compressive stress on the bone (in each leg) in
asked by Brittnieee. 
12
The new Physical Activity Guidelines for Americans allows a person to accumulate 150 minutes a week ________. A. By engaging in 30 minutes of physical activity for 5 days a week only B. By engaging in 50 minutes of physical activity for 3 days a week only
asked by desha 
13
Children and adolescents are considered to be reflected in which age group? A. 617 years old B. 317 years old C. 517 years old D. 1017 years old c
asked by desha 
Early Childhood Literacy
Words are : A . Convenient Communication shortcuts B .Not arbitrary symbols C .Unique to each individual in English D .Thoughts written down. I chose D
asked by Ade 
geometry
the shadow of a tree is 8 feet long. How long of a shadow does a 6 foot man cast?
asked by Dione 
14
The key to using a pedometer to meet the Physical Activity Guidelines for Americans is to _________. A. First set a time goal and then calculate how many steps are needed each day to reach that goal B. First set a time goal and then calculate how rigorous
asked by desha 
15
An example of a muscle strengthening activity includes ___________. A. Zumba fitness B. Jumping jacks C. Aerobics classes D. Lifting weights b
asked by desha 
english
I have a Question about The Merchant of Venice By william shakspear. What are Some promises made in the stor??? Please help!
asked by Josh 
physics
A diver with a mass of 70.0 kg stands motionless at the top of a 3.0 m high diving platform. Calculate his speed when he enters the pool. Thanks so much for helping!
asked by Ryley 
16
If older adults are at risk of falling, they should do exercises that maintain or improve ________. A. Flexibility B. Muscle strengthening C. Mobility D. Balance d r b
asked by desha 
Probability
Darby guesses the answers to six questions on the math portion of her college entrance exam. Each question is a true or false question. What is the approximate probability that at least 4 of her answers are correct? A. 0.23 B. 0.34 C. 0.66 D. 0.78
asked by Student 
Advanced Algebra
John is making a sundae. If there are 13 flavors of ice cream, 9 different toppings, and 4 types of nuts, how many different sundaes can he make if he chooses one of each?
asked by John 
17
People who regularly engage in at least moderate intensity aerobic activity have a significantly lower risk of developing ________ than do inactive people. A. Lung cancer B. Type 2 diabetes C. Hip fractures D. Breast cancer b
asked by desha 
Algebra 2
What is the probability when you roll 2 dice and you roll a number greater than 4 on the first dice and a 2 on the second dice? pls help :)
asked by Mary 
18
What is an example of how adults can develop knowledge to attain goals if running is a goal: A. Learn how to reduce the risk of running injuries by selecting an appropriate training program and proper shoes B. Purchase clothes that appeal to the opposite
asked by desha 
Math PLEASE HELP!
Sarita works 2 days each week. If her office is open 7 days each week, use pascal's triangle to find the probability that she will be scheduled for Wednesday and Saturday next week. A. 2/7 B. 1/14 C. 1/21 D. 1/42
asked by Lexi 
19
Healthy pregnant and postpartum women should get at least ________ of moderateintensity aerobic activity a week. A. 60 minutes B. 150 minutes C. 30 minutes D. 200 minutes b
asked by desha 
physics
A wire 453 m long is in a 0.2 T magnetic field. A 2.56 N force acts on the wire. What current is in the wire? Answer in units of mA
asked by h 
20
If you are overweight or obese, getting active can help you lower your risk of? A. Leukemia B. Stroke C. Alzheimer’s disease D. High selfesteem c
asked by desha 
MATH! :(
Yesterday, at a local restaurant, 60% of the customers ordered a burger. If 42% of the customers ordered a burger and fries, what is the probability that a customer who ordered a burger also ordered fries? If 15% of the customers ordered a burger and onion
asked by SAM