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Questions Asked on October 18, 2010

A spring-loaded toy gun is used to shoot a ball of mass m=1.5 kg straight up in the air. The spring has spring constant k=667
1. 2 answers
2. asked by Eden
3. 18,204 views
is breaking an egg a chemical or physical change?is cooking an egg a chemical or physical change?
1. 9 answers
2. asked by Elizabeth
3. 10,513 views
I stuck on this problem.Can you help me to solve it? A reaction mixture in a 3.67L flask at a certain temp. initially contains
1. 4 answers
2. asked by Kim
3. 8,182 views
An automobile antifreeze mixture is made by mixing equal volumes of ethylene glycol (d=1.114 g/mL; M=62.07 g/mL) and water
1. 2 answers
2. asked by Stacey
3. 6,865 views
A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter
1. 2 answers
2. asked by LIZ
3. 4,101 views
1. A small piece of zinc reacts with dilute HCl to form H2, which is collected over water at 16°C into a large flask. The total
1. 4 answers
2. asked by Carter
3. 4,074 views
How many moles of solute particles are present in 1 L of 1.20 M KBr?
1. 1 answer
2. asked by Shea
3. 4,054 views
You have 600 feet of fencing to enclose a rectangular plot that borders on a river. If you do not fence the side along the
1. 3 answers
2. asked by Tori
3. 3,861 views
Styrene, C8H8, is one of the substances used in the production of synthetic rubber. When styrene burns in oxygen to form carbon
1. 2 answers
2. asked by Jazmin
3. 3,799 views
How many moles of solute particles are present in 1 L of aqueous 0.08 M ethanol (C2H5OH)?
1. 1 answer
2. asked by Blair
3. 3,708 views
A steel tank contains carbon dioxide at 34 celsius and is at 13.0 atm. Determine the internal gas pressure when the tank and its
1. 3 answers
2. asked by lavonne
3. 3,332 views
The city council has decided to add a 0.3% tax on motel and hotel rooms. If a traveler spends the night in a motel room that
1. 1 answer
2. asked by amelie
3. 3,229 views
6 J of work is needed to push an object of mass 2 kg from point A to point B of the frictionless inclined plane. If the angle of
1. 2 answers
2. asked by Anonymous
3. 3,023 views
The average age of chemical engineers is 37 years with a standard deviation of 4 years. If an engineering firm employs 25
1. 1 answer
2. asked by Anonymous
3. 2,529 views
The U.S. Food and Drug Administration lists dichloromethane (CH2Cl2) and carbon tetrachloride (CCl4) among the many
1. 2 answers
2. asked by Claire
3. 2,309 views
100g of a clear liquid is evaporated and a few grams of whitecrystals remain. The original liquid wasa a) heterogeneous compound
1. 3 answers
2. asked by Jazmin
3. 2,299 views
i have a project on changing area under forest and its impact on environment and i am not getting any information on it can you
1. 2 answers
2. asked by Anonymous
3. 2,016 views
In Twain's "The Private History of a Campaign that Failed," Smith, the blacksmith's apprentice, is given "ultimate credit" forA.
1. 3 answers
2. asked by royalty
3. 1,984 views
A hot air balloon rising straight up form a level field is tracked by a range finder 500ft from the liftoff point. At the moment
1. 2 answers
2. asked by Denzel
3. 1,970 views
what was the napoleonic code?
1. 15 answers
2. asked by Emma
3. 1,936 views
I have to write a letter....and i kinda suck at writing letters....A national television station recently broadcast a programme
1. 3 answers
2. asked by edyx17
3. 1,907 views
A steel tank contains carbon dioxide at 34 celsius and is at a pressure of 13.0 atm. Determine the internal gas pressure when
1. 2 answers
2. asked by lavonne
3. 1,862 views
Shondra wants to enclose a rectangular garnden with 240 yards of fencing. What dimensions for the garden will maximize its area?
1. 1 answer
2. asked by Samantha
3. 1,814 views
The U.S. Food and Drug Administration lists dichloromethane (CH2Cl2) and carbon tetrachloride (CCL4) among the many
1. 1 answer
2. asked by Monica
3. 1,797 views
The vapor pressure of pure ethanol at 20 degrees C is 44 mmHg, and the vapor pressure of pure methanol at the same temperature
1. 2 answers
2. asked by Stephany
3. 1,782 views
In a college, some courses contribute more towards an overall GPA than other courses. For example, a science class is worth 4
1. 1 answer
2. asked by john
3. 1,755 views
you are a pilot on an aircraft carrier. you must fly to another aircraft carrier, now 1,450km at 45 degres of your position,
1. 1 answer
2. asked by john
3. 1,717 views
1- Which entrepreneurial/small business owner characteristics does Bill have that may be important to his success? Which
1. 3 answers
2. asked by mahalakshmi
3. 1,697 views
You have 50 yards of fencing to enclose a rectangular region. Find the dimensions of the rectangle that maximize the enclosed
1. 4 answers
2. asked by Hayley
3. 1,664 views
Help with spanish!!!! Have to put correct words in the banks. 2 of them will not be used.?Querida Beth: 1) (blank) esta todo
1. 1 answer
2. asked by jeff
3. 1,640 views
The heights of a large population of students have a mean of 60" with a standard deviation of 3". What is the mean of the
1. 1 answer
2. asked by Audrey
3. 1,624 views
Three charged particles are located at the vertices of a right angled triangle. Charge A(5.0*10^-6) has Cartesian coordinates of
1. 1 answer
2. asked by Anonymous
3. 1,600 views
9:00 AM to 2:45 PM you have to write a mixed number for each time period in lowest from
1. 5 answers
2. asked by Lilly
3. 1,550 views
If Leah is 6 years older than Sue, and John is 5 years older than Leah, and the total of their ages is 41. Then how old is Sue?
1. 2 answers
2. asked by amelie
3. 1,520 views
Use differentials (or equivalently, a linear approximation) to approximate ln(1.02) as follows: Let f(x)=ln(x) and find the
1. 1 answer
2. asked by Denzel
3. 1,491 views
How much work must you do to push a 10 kg block of steel across a steel table friction is 0.6 at a steady speed of 1.3 m/s for
1. 1 answer
2. asked by mike
3. 1,468 views
Pheromones are compounds secreted by the females of many insect species to attract males. One of these compounds contains
1. 1 answer
2. asked by Rory
3. 1,450 views
Write three number that are greater than 1,543,000 but less than 1,544,000
1. 5 answers
2. asked by jose
3. 1,432 views
i am inside the path numbers 7,6,9,3 i am the difference of 2 numbers outside the path 7,6,9,3,what number am i
1. 11 answers
2. asked by sharise
3. 1,430 views
A block of weight = 25.0 N sits on a frictionless inclined plane, which makes an angle = 34.0 with respect to the horizontal, as
1. 1 answer
2. asked by Eden
3. 1,407 views
if a certain pressure supports a 256 column of mecury, how high a column of water would it support?
1. 2 answers
2. asked by lavonne
3. 1,403 views
A 14 N force with a fixed orientation does work on a particle as the particle moves through displacement d = (2i - 4j + 3k) m.
1. 2 answers
2. asked by Sam
3. 1,397 views
Substance A has a melting point of -10 degree celcius and a boiling point of 57 degree celcius. Sunstance B has a melting point
1. 1 answer
2. asked by Claudia
3. 1,396 views
A coin dealer, offered a rare silver coin, suspected that it might be a counterfeit nickel copy. The dealer heated the coin,
1. 0 answers
2. asked by andrea
3. 1,381 views
when a 25.0 mL sample of an unknown acid was titrated with a 0.100 M NaOH solution. Determine Ka for the unknown acid. Volume
1. 1 answer
2. asked by Rosemary
3. 1,375 views
A football is thrown with an initial upward velocity component of 15.0 m/s and a horizontal velocity component of 18.0 m/sThe
1. 4 answers
2. asked by Mattie
3. 1,372 views
A solution contains .370 mol of isopropanol (C3H7OH) dissolved in 1.700 mol of water. A) What is the mole fraction of
1. 1 answer
2. asked by Natalie
3. 1,369 views
A particle moves along a straight path through displacement i = (2.2 m) + c while force = (3.2 N) - (3.8 N) acts on it. (Other
1. 1 answer
2. asked by Sam
3. 1,368 views
A solution contains .370 mol of isopropanol (C3H7OH) dissolved in 1.700 mol of water. What is the mass percent of isopropanol?
1. 1 answer
2. asked by Luke
3. 1,367 views
How much heat is required to warm 1.30 L of water from 30.0 degrees C to 100.0 degrees C?(Assume a density of 1.0 g/mL for the
1. 3 answers
2. asked by Mely
3. 1,350 views
A cell has a salt concentration of 0.2 %. If it is placed into a solution with a salt concentration of 0.1 %.a) What change will
1. 0 answers
2. asked by Emily
3. 1,346 views
It takes 45.0 J to raise the temperature of an 9.70 g piece of unknown metal from 13.0 degrees C to 24.5 degreesC. What is the
1. 1 answer
2. asked by Michelle
3. 1,318 views
A bullet of mass is fired horizontally with speed at a wooden block of mass resting on a frictionless table. The bullet hits the
1. 1 answer
2. asked by Eden
3. 1,306 views
what is sin 35=x/6
1. 1 answer
2. asked by aundrea
3. 1,294 views
4. The power of judicial review allows federal courts to decidea. who will be President if the Electoral College is tied b. if
1. 1 answer
2. asked by mysterychicken
3. 1,293 views
A solution of vinegar is 5.16% by mass aetic acid, CH3CO2H, in water. Assuming the density of vinegar is 1.00 g/mL, what is the
1. 1 answer
2. asked by Missy
3. 1,282 views
A merry-go-round in the park has a radius of 1.8 m and a rotational inertia of 900kgm^2. A child pushes the merry-go-round with
1. 0 answers
2. asked by Alyssa
3. 1,277 views
a soccer ball is kicked with an initial velocity of 5.0 m/s in a direction of 30 degrees above the horizontala. what are the
1. 1 answer
2. asked by elana
3. 1,274 views
An ice hockey puck slides along the ice at 12m/s. A hockey stick delivers an impulse of 4.0kg*m/s causing the puck to move off
1. 2 answers
2. asked by tyler
3. 1,264 views
If you do 600J of work hoisting a 20kg bale of hay, to what height did you lift
1. 2 answers
2. asked by Lo
3. 1,255 views
calculate the impulse necessary to stop a 1500 kg car travelling at 90km/hour
1. 1 answer
2. asked by Anonymous
3. 1,229 views
We did a lab separating out the components of a mixture. One of the lab questions is "The weight of naphthalene was obtained by
1. 2 answers
2. asked by Martha
3. 1,222 views
A 65 kg crate is dragged across a floor by pulling on a rope attached to the crate and inclined 25° above the horizontal. (a)
1. 2 answers
2. asked by Sam
3. 1,210 views
Cl2 + 2koh-->kcl _kclo +H2O3KClo-->2Kcl+kclo3 4kclo3-->3kclo4 +kcl what mass of cl2 (g) is required to make 234g kclo4
1. 1 answer
2. asked by adele
3. 1,202 views
Write each complex number in rectangular form?I need help with this. :/ 2(cos120°+i sin 120°) and 4(cos 7π/4 + i sin 7π/4) ?
1. 1 answer
2. asked by Fernando
3. 1,194 views
What is the net ionic equation for the reaction of AgNO3 with Ba(OH)2?
1. 1 answer
2. asked by Brandon
3. 1,191 views
How would you write the chemical formula for Mercury(I) nitrate.I have Hg(NO3)2 since the charge of nitrate is -1 and Mercury's
1. 3 answers
2. asked by Moi
3. 1,188 views
What are twenty questions that you could ask a scuba diver about scuba gear and diving?
1. 0 answers
2. asked by Aaliyah
3. 1,186 views
Why is it necessary to prepare formal financial statements if all of the data are in the statement columns of the worksheet?
1. 0 answers
2. asked by Joan
3. 1,168 views
The decomposition of HI(g) is represented by the equation:2HI(g) <-> H2(g) + I2(g) Kc= 64 at 25°C. If the equilibrium
1. 2 answers
2. asked by Adam
3. 1,137 views
At 16°C a sample of ammonia gas exerts a pressure of 11.7 atm. What is the pressure when the volume of the gas is reduced to
1. 2 answers
2. asked by april
3. 1,133 views
A sample of blood is placed in a centrifuge of radius 20.0 cm. The mass of a red blood cell is 3.0 10-16 kg, and the magnitude
1. 2 answers
2. asked by Erica
3. 1,120 views
find the perimeter of a regular octagon with sides of 5.5cm.
1. 0 answers
2. asked by Jerrry
3. 1,115 views
Assume cathy has to drag her suitcase along the floor of the airport terminal by a rope. The rope makes a 40.0 degree angle with
1. 0 answers
2. asked by Lisa
3. 1,105 views
A(-3,-2) B(8,4)are the ends of the diameter of a circle.the tangent of the circle at point B is -11x+6y+64=0 the line L passes
1. 0 answers
2. asked by james
3. 1,100 views
i need help with this quretsion ; i don't know if im right, and i dontknwo what do nextquestion expand and simplfy: 4√7(2√3
1. 2 answers
2. asked by priya
3. 1,099 views
95.0 mL of H_2O is initially at room temperature (22 degree C). A chilled steel rod at 2 degree C is placed in the water. If the
1. 2 answers
2. asked by Mely
3. 1,096 views
The volume of a cone of radius r and height h is given by V=(1/3)pir^2h. If the radius and the height both increase at a
1. 1 answer
2. asked by Kris
3. 1,095 views
The only force acting on a 3.0 kg body as it moves along the positive x axis has an x component Fx = -9x N, where x is in
1. 0 answers
2. asked by Megan
3. 1,085 views
during the 19th century, american society became increasingly:a) rural b) homogeneous c) heterogeneous d) non-industrial I think
1. 5 answers
2. asked by Melisa
3. 1,076 views
what is 18/25 divided by 2?
1. 3 answers
2. asked by Misti
3. 1,067 views
3 neighbors are sharing a rectangular strip of land for a garden. They divide the land into 24 equal sized pieces. What fraction
1. 1 answer
2. asked by Jimmy
3. 1,066 views
A hunter wishes to cross a river that is 1.1 km wide and flows with a speed of 5.0 km/h parallel to its banks. The hunter uses a
1. 0 answers
2. asked by john
3. 1,048 views
I am having trouble with this question, please help.If a person makes $30,000 in 2004 and the inflation rate is 4% annually, how
1. 0 answers
2. asked by Tammy
3. 1,035 views
A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter
1. 3 answers
2. asked by Sam
3. 1,030 views
A military helicopter on a training mission is flying horizontally at a speed of 60.0 m/s when it accidentally drops a bomb
1. 0 answers
2. asked by Mattie
3. 1,014 views
kassie an kesya are dividing $39 into two parts in order that the sum of 2/3 of one part and 3/4 of the other part is $28. What
1. 1 answer
2. asked by bob
3. 1,008 views
A 1.80 kg block slides on a frictionless horizontal surface. The block hits a spring with a speed of 2.00 m/s and compresses it
1. 1 answer
2. asked by Lauren
3. 999 views
2X^2+3X+1d^2+8d+7 2a^2+5a+3 3x^2-x-4 2n^2+n-6 x^2+5x-14 5x^2-2x-7 7n^2+9n+2 3x^2+8x+4 7a^2-30a+8
1. 2 answers
2. asked by factoring! help! urgent!! :(
3. 989 views
A 26.5 g sample of ethylene glycol, a car radiator coolant, loses 675 J of heat. What was the initial temperature of ethylene
1. 1 answer
2. asked by Megan
3. 983 views
for classification what word goes with know,think?
1. 1 answer
2. asked by suzy
3. 980 views
The specific heat capacity of aluminum is .89 J/y degrees C. How much heat is required to change the temp of 1500g aluminum pan
1. 2 answers
2. asked by Emily
3. 978 views
I need help answering this:Historians have used the terms "robber barons" and "captains of industry" to describe the powerful
1. 1 answer
2. asked by mysterychicken
3. 976 views
When 1 mol of a gas burns at constant pressure, it produces 2426 J of heat and does 6 kJ of work.What is Delta H, q, and w?
1. 1 answer
2. asked by Michelle
3. 969 views
A car starts from rest and travels along a circular track with a radius of 55.0 meters. The car starts out at a position due
1. 1 answer
2. asked by Diana
3. 966 views
Make up a set of at least 12 numbers that have the following landmarks maximum 18 range 13 mode 7 and median 12
1. 1 answer
2. asked by Kiki
3. 965 views
find dq/dp.q=(5p^2+2p)-3/2 use impliict differentiation to find dq/dp
1. 0 answers
2. asked by george
3. 961 views
Bamboo belongs to the grass family.I have to tell if the verb is transitive or intransitive. belongs is the verb and it's
1. 1 answer
2. asked by Hayley
3. 957 views
need some help, A ball with an initial angular velocity of 20.0 rads /s and a rotational inertia of 0.4kgm rolls uphill with an
1. 0 answers
2. asked by justin
3. 956 views
Two 2.0g spheres are attached to each end of a silk thread 1.20m long. The spheres are given identical charges and the midpoint
1. 1 answer
2. asked by Anonymous
3. 956 views

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