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2011
February

Questions Asked on February 18, 2011

A firefighter a distance d from a burning building directs a stream of water from a fire hose at angle θi above the horizontal
1. 4 answers
2. asked by eric
3. 6,362 views
An airplane has an airspeed of 724 kilometers per hour at a bearing of 30 degrees.The wind velocity is 32 kilometers per hour
1. 2 answers
2. asked by Kourt
3. 3,729 views
A projectile is fired in such a way that its horizontal range is equal to 8.5 times its maximum height. What is the angle of
1. 2 answers
2. asked by eric
3. 3,640 views
lyle needs 200g of chocolate that is 86% cocoa for a cake recipe he has one kind that is 99% cocoa and another kind that is 70%
1. 2 answers
2. asked by Olga
3. 3,076 views
On the fastest speedways some drivers reach average speeds of 4 miles per minute. Write a formula that gives the number of miles
1. 1 answer
2. asked by Anonymous
3. 2,773 views
A boy can throw a ball a maximum horizontal distance of R on a level field. How far can he throw the same ball vertically
1. 2 answers
2. asked by Anonymous
3. 2,600 views
Find an equation of the tangent line to the graph of the function f defined by the following equation at the indicated point.(x
1. 1 answer
2. asked by Anonymous
3. 2,518 views
An arrow is short vertically upward with an initial speed of 25m/s. When it's exactly halfway to the top of its flight, a second
1. 1 answer
2. asked by Mary
3. 2,482 views
Calculate the pH of a 0.250M solution of Sulfurous acid, H2SO3.
1. 2 answers
2. asked by Josh
3. 2,369 views
Determine whether the lines intersect(have a common point) and if so, find the coordinates of that point?r(t) = < 4t+3, 4t + 2,
1. 1 answer
2. asked by Z32
3. 2,318 views
A copper vat is 10 m long at room temperature (20 degrees C). How muchlonger it is when it contains boiling water at 1 atm
1. 1 answer
2. asked by Matt
3. 2,214 views
A boy can throw a ball a maximum horizontal distance of R on a level field. How far can he throw the same ball vertically
1. 4 answers
2. asked by Anonymous
3. 2,080 views
1. What aspects of the social and work environment in a fast-food restaurant would be of particular interest to a sociologist
1. 1 answer
2. asked by Anonymous
3. 1,942 views
In a local bar, a customer slides an empty beer mug down the counter for a refill. The bartender is momentarily distracted and
1. 1 answer
2. asked by eric
3. 1,940 views
a passenger car will go 525 miles on 17.5 gallons of gasoline in city of driving. what is the rate miles per gallon?
1. 3 answers
2. asked by bria
3. 1,872 views
A rock is thrown from a cliff top at 18m/s, 25 degrees above the horizontal. It lands on the beach 4.2 seconds later.a) What is
1. 3 answers
2. asked by stacy
3. 1,828 views
Can a contour line on a topographic map connect a point with an elevation of 100 feet to a point with an elevation of 110 feet?
1. 4 answers
2. asked by linda
3. 1,756 views
Gina flew from Toronto to Chicago and back again. The average speed of the plane was 332 km/h to Chicago and 415 km/h back to
1. 1 answer
2. asked by Jen
3. 1,697 views
a recipe call for 1.5 cups of mix to make 8 pancakes. John wants to make 12 pancakes and uses 2 cup of mix. Does John have the
1. 1 answer
2. asked by annie
3. 1,554 views
IT TAKES 60oz of grass seed to seed 2400ft^2 of lawn. at this rate, how much will be needed for 4400ft^2 of lawn?
1. 1 answer
2. asked by bria
3. 1,532 views
three more questions:1) A 1.50kg projectile is launched at 18.0m/s from level ground. The launch angle is 26 degrees above the
1. 2 answers
2. asked by stacy
3. 1,501 views
A fireworks rocket explodes at height h, the peak of its vertical trajectory. It throws out burning fragments in all directions,
1. 2 answers
2. asked by eric
3. 1,398 views
Which of the following molecules is polar? NCl3, NO2, H2S, or SiH4
1. 3 answers
2. asked by Vova
3. 1,350 views
Kent invested $5000 in a retirement plan. He allocated x dollars of the money to a bond account that earns 4% interest per yr
1. 0 answers
2. asked by ---
3. 1,343 views
A proton is located at the origin, and a second proton is located on the x-axis at x = 5.58 fm (1 fm = 10-15 m).(a) Calculate
1. 4 answers
2. asked by Greg
3. 1,328 views
A basketball star covers 2.70 m horizontally in a jump to dunk the ball (see figure). His motion through space can be modeled as
1. 1 answer
2. asked by eric
3. 1,325 views
When a mass of 28 g is attached to a certainspring, it makes 18 complete vibrations in 4.1 s. What is the spring constant of the
1. 0 answers
2. asked by Sangita
3. 1,252 views
responsibility to ensure the prosperity of the city rome
1. 1 answer
2. asked by angela
3. 1,209 views
Which of the following is given as a reason for nations NOT to engage in free trade?A) Free trade gives consumers access to
1. 1 answer
2. asked by KEVIN
3. 1,194 views
An astronaut on the surface of Mars fires a cannon to launch an experiment package, which leaves the barrel moving horizontally.
1. 1 answer
2. asked by Anonymous
3. 1,192 views
a bag contains 5 green marbles 2 white marbles 8 blue marbles 9 red marbles and 6 black marbles what is the probability of
1. 2 answers
2. asked by Bob
3. 1,179 views
can someone please help me balance this equation?:potassium permanganate reacts with iron(II)sulfate and sulfuric acid to
1. 1 answer
2. asked by joy
3. 1,179 views
is this sentence correct -- Andrew forgot his lunchbox at school everyday.
1. 1 answer
2. asked by denise
3. 1,115 views
the angle of depression from d to f measures 10 degrees. if df equals 300m, find df. round to the nearest tenth.
1. 4 answers
2. asked by tyler
3. 1,110 views
I was given an assignment to write a one paragraph essay.I need you to pls help me with my essay on "the sniper" by liam
1. 1 answer
2. asked by ted
3. 1,079 views
What is it like for a person to handle working with multiple personalities in a group?
1. 2 answers
2. asked by Alex L.
3. 1,062 views
A race car starts from rest on a circular track. The car increases its speed at a constant rate at as it goes 2.75 times around
1. 0 answers
2. asked by eric
3. 1,061 views
A slab of copper of thickness b = 1.566 mm is thrust into a parallel-plate capacitor of C = 4.00×10-11 F of gap d = 10.0 mm, as
1. 3 answers
2. asked by Mike
3. 1,055 views
Penelope bought 17 large packs and 5 small packs of identical pens. When she got home, her little sister opened all of the
1. 1 answer
2. asked by Diana
3. 1,008 views
Kim is tuning a piano. She strikes a 440 Hz tuning fork and a string at the same time and hears 4 beats per second.a) What are
1. 2 answers
2. asked by Courtney
3. 1,003 views
The Ka value of nitrous acid, HNO2 , is 4.0 × 10¯4 . What is the equilibrium constant for the reaction; NO2¯ + H2O <-> HNO2 +
1. 2 answers
2. asked by Thomas
3. 977 views
Review the four paragraphs below. There is one paragraph matching each of the following types: summary, analysis, synthesis, and
1. 1 answer
2. asked by jub
3. 973 views
what 3 dimensional shape has base of a triangle,4 faces,6 edges and 4 vertices?
1. 1 answer
2. asked by sally
3. 961 views
Write the correct chemical formula for barium nitrate. What isthe ratio of barium ions to nitrate ions?
1. 1 answer
2. asked by Jazmine
3. 958 views
what aspects of a fast food restaurant would interest sociologists
1. 1 answer
2. asked by jam
3. 957 views
rule y=4x-5input 3,5,7 help me find out the output values
1. 1 answer
2. asked by irene
3. 956 views
Samples of Neon and helium are placed in separate containers connected by a pinched rubber tube. There is 5.00 liters of neon at
1. 0 answers
2. asked by T
3. 946 views
The acceleration due to gravity on earth
1. 1 answer
2. asked by Robert
3. 934 views
Two batsmen A and B made the following scores in a series of cricket matches:-A: 14 13 26 53 17 29 79 36 84 49 B: 37 22 56 52 14
1. 0 answers
2. asked by Sujit
3. 931 views
A suitcase of weight mg = 450 is being pulled by a small strap across a level floor. The coefficient of kinetic friction between
1. 5 answers
2. asked by Catherine
3. 927 views
Bill purchased 4 pens for $3.32 including $.16 sales tax. FIND THE CCOST OF ONE PEN. I need to write this in an equation. Then
1. 4 answers
2. asked by travis
3. 926 views
An electric field is generated by a charge imbalance and the field is expressed byCoulomb’s Law. What is the value (and UNITS)
1. 1 answer
2. asked by maritza
3. 925 views
Aluminum is melted during the recycling process.(a) How much heat must be transferred to each kilogram of aluminum to bring it
1. 1 answer
2. asked by Heat transfer
3. 921 views
A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the
1. 1 answer
2. asked by Anonymous
3. 916 views
Use substitution to solve the system3x + 7y = −3 (1) 7x + y = −53 (2) Find the value of x. (part 2 of 2)Find the value of y.
1. 1 answer
2. asked by briana
3. 912 views
you are conducting a freezing-point determination in the laboratory by using an aqueous solution of KNO3. The observed freezing
1. 0 answers
2. asked by Anonymous
3. 897 views
a liquid has an enthalpy of vaporization of 30.8 kg.mol. at 273 K it has a vapor pressure of 102 mmHg. What is the normal
1. 0 answers
2. asked by ella
3. 897 views
A fisherman sets out upstream from Metaline Falls on the Pend Oreille River in northwestern Washington State. His small boat,
1. 1 answer
2. asked by Anonymous
3. 889 views
How do the ideas of divisibility and multiples relate to the study of fractions?Show that 1,078 and 3,315 are relatively prime.
1. 3 answers
2. asked by anonymous
3. 865 views
Consider the following consumption function. C = 200 + .75(DPI),Where C is consumption, autonomous spending is 200, the MPC is
1. 0 answers
2. asked by ben
3. 859 views
How many grams of magnesium oxide are formed when 13.5 L of oxygen gas, measured at STP, completely reacts with magnesium metal
1. 1 answer
2. asked by hannah
3. 852 views
Identify the area of physics that is most relevant to each of the following situations.a)A high school football game b)Food
1. 9 answers
2. asked by nancy
3. 849 views
A dive bomber has a velocity of 235 m/s at an angle θ below the horizontal. When the altitude of the aircraft is 2.15 km, it
1. 0 answers
2. asked by eric
3. 845 views
How did Muslim merchants influence the devolopment of trade in Africa?
1. 0 answers
2. asked by Christina
3. 837 views
An electron is at the origin.(a) Calculate the electric potential VA at point A, x = 0.410 cm. (b) Calculate the electric
1. 4 answers
2. asked by Greg
3. 836 views
any two cubic number that when added toghether gives anothere cubic number a^3+b^3=c^3. find a,b&c
1. 2 answers
2. asked by nimrod
3. 828 views
a salesperson earns 150 commission selling 3,000 worthof television sets. what is the commission rate?
1. 3 answers
2. asked by bria
3. 828 views
1....How much force needed to bring a 3200 lb car from rest to a velocity of 44 m/s in 8 sec.?2....A ball with a mass of 2 kg
1. 2 answers
2. asked by EM
3. 820 views
Ms. Billets used 2 feet of yarn to make an ornament. Write this lenth as a fraction of the total lenghth of yarn she bought. Is
1. 1 answer
2. asked by Esther
3. 809 views
What is the maximum number of glass tumblers each with a circumference of inches that can be placed rectangular on a table of
1. 2 answers
2. asked by Anonymous
3. 806 views
A coin is tossed 3 times. What is the probability of getting 2 heads and 1 tail?
1. 1 answer
2. asked by Elizabeth
3. 795 views
A rock is thrown upward from the level ground in such a way that the maximum height of its flight is equal to its horizontal
1. 1 answer
2. asked by eric
3. 794 views
You are given an equation of the formy = ax2 + bx + c. y = 4x2 + 2x − 3 (a) Use a graphing utility to graph the equation and
1. 3 answers
2. asked by sakina
3. 779 views
An airplane has an airspeed of 724 kilometers per hour at a bearing of 30 degrees.The wind velocity is 32 kilometers per hour
1. 0 answers
2. asked by Kourt
3. 773 views
An advertisement is to contain 75 sq.cms of printed area. There is a 2cm margin at the bottom, 3cm margin in each side and no
1. 1 answer
2. asked by Sujit
3. 765 views
a .250kg block of aluminum is heated to 100 C and then dropped into .60 kg of water that is initially at 20C. What is the
1. 2 answers
2. asked by Anonymous
3. 760 views
Washington-Pacific invests $2 million to buy a tract of land and plant some young pine trees. The trees can be harvested in 15
1. 0 answers
2. asked by Shan
3. 760 views
A Coast Guard cutter detects an unidentified ship at a distance of 16.7 km in the direction 13.8° east of north. The ship is
1. 0 answers
2. asked by Anonymous
3. 754 views
A Force,F=10N,applied at an angle of 37 degree above the horizontal,moves a crate a distance of 5m along a rough horizontal
1. 1 answer
2. asked by Joel
3. 752 views
A science student is riding on a flatcar of a train traveling along a straight horizontal track at a constant speed of 12.0 m/s.
1. 0 answers
2. asked by Anonymous
3. 741 views
-7x+7y=7 2x-2=-18 how many solutions does this system have ?
1. 2 answers
2. asked by Kassandra
3. 741 views
Assume that each of the follwing functions gives the position of an object at time t. Find the velocities indicated by setting
1. 5 answers
2. asked by Catherine
3. 738 views
A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that
1. 0 answers
2. asked by Emily
3. 738 views
Kent invested $5000 in a retirement plan. He allocated x dollars of the money to a bond account that earns 4% interest per yr
1. 0 answers
2. asked by ---
3. 734 views
On a topographic map, how would you show a hill with an elevation of 80 feet if the contour interval is 10 feet?
1. 1 answer
2. asked by linda
3. 701 views
Find an equation of the tangent line to the graph of the function f defined by the following equation at the indicated point.(x
1. 2 answers
2. asked by Anonymous
3. 701 views
If we are running on a threadmill with a speed such that I appear stationary and throw a ball, will the ball go further as
1. 1 answer
2. asked by HK
3. 701 views
I'm really bad with monomial expressions. Can someone please help?Is 7(m - 2) a monomial expression? yes or no Is 3mnp a
1. 2 answers
2. asked by Cheryl
3. 697 views
List at least 2 similarities and 4 differences found through comparing the music, the music traditions, performing, etc., of
1. 0 answers
2. asked by Freddy
3. 692 views
Two rigid containers of equal volume hold hydrogen and argon gases respectively at the same temperature and pressure. Which of
1. 1 answer
2. asked by Gina
3. 690 views
A suitcase of weight mg = 450 is being pulled by a small strap across a level floor. The coefficient of kinetic friction between
1. 1 answer
2. asked by Catherine
3. 689 views
Prove that the correlation coefficient r lies between -1 and +1.
1. 1 answer
2. asked by Sujit
3. 685 views
Michelle is making a scale drawing of a building. The scale for the drawing is1 inch = 6 feet. The height of the building in the
1. 3 answers
2. asked by lisa
3. 678 views
An organism has three independently assorting traits AaBbCc. What fraction of its gametes will contain the recessive gene abc?
1. 0 answers
2. asked by Sam
3. 673 views
An enemy ship is on the east side of a mountain island, as shown in the figure. The enemy ship has maneuvered to within d1 =
1. 0 answers
2. asked by Anonymous
3. 672 views
Need help with negation using demorgan law.~(a and ~b) I have ~a and b Is that correct?
1. 0 answers
2. asked by phobia
3. 671 views
Im doing my lab report about steam distillation?and its asking me how i can tell if the two compounds i steam distilled are
1. 3 answers
2. asked by ben
3. 669 views
A soccer player kicks a rock horizontally off a 40.0 m high cliff into a pool of water. If the player hears the sound of the
1. 3 answers
2. asked by eric
3. 666 views
An investment will pay $100 at the end of each of the next 3 years, $400 at the end of Year 4, $600 at the end of Year 5, and
1. 0 answers
2. asked by Mat
3. 663 views
What's the relationship between ionization energy and electron affinity? I ionization eneergy deals with losing electrons and
1. 0 answers
2. asked by Emily
3. 663 views

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