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2012
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Questions Asked on October 7, 2012

To create artificial gravity, the space station shown in the drawing is rotating at a rate of 1.60 rpm. The radii of the
1. 2 answers
2. asked by Redgy22
3. 8,475 views
A billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. The mass of the ball is 0.38 kg. The ball
1. 3 answers
2. asked by Cheng
3. 8,004 views
Mamma Temte bakes six pies a day that cost $2 each to produce. On 15% of the days, she sells only two pies. On 27% of the days,
1. 1 answer
2. asked by Anonymous
3. 7,702 views
A total of $12,000 is invested in two funds paying 9% and 11% simple interest. If the yearly interest is $1,180, how much of the
1. 2 answers
2. asked by lin
3. 7,101 views
what is 18.75 rounded to the nearest tenth?
1. 10 answers
2. asked by Anonymous
3. 3,210 views
Which of the following molecules has the highest boiling point? CH4,BH3,NH3, SH2?
1. 1 answer
2. asked by Jennifer
3. 2,999 views
I’m having problems creating the flow chart, so I am unable to insert the numbers. This is what I have done this far, and
1. 1 answer
2. asked by JJ
3. 2,913 views
Which of the following is a negative ion?Na+1,Na,O-2,O? All of them?
1. 1 answer
2. asked by Jennifer
3. 2,543 views
A 750 kg skier rides a 2830 m long lift to the top of a mountain. The lift makes an angle of 14.6˚ with the horizontal. What is
1. 2 answers
2. asked by grace lopez
3. 2,531 views
describe step by step, how will you prepare 10 mL of 0.020 M HCL from the 0.050 M solution?
1. 1 answer
2. asked by cristina
3. 2,422 views
what is the mass (in milligrams) of solute in 26.0mL of 0.25M sucrose (342g/mol)?
1. 2 answers
2. asked by engr
3. 2,389 views
Technetium-99m emits only gamma radiation. Why would this type of radiation be used in diagnostic imaging rather than an isotope
1. 2 answers
2. asked by Boo Boo
3. 2,365 views
20% of the books in a library were fiction books while the rest were non-fiction books. When 30% of the fiction books and 15% of
1. 1 answer
2. asked by Student56
3. 2,348 views
30% of the rabbits from a farm were lent to a zoo. After a month, 5/6 of the rabbits were returned to the farm. There were 228
1. 6 answers
2. asked by Student56
3. 2,215 views
A car is driven 215 km west and then 85 km southwest. What is the displacement of the car from the point of origin magnitude and
1. 1 answer
2. asked by bubbles
3. 2,036 views
The combustion reaction for benzoic acidC6H5CO2H(s) + 15 2 O2(g) → 7 CO2(g) + 3 H2O(ℓ) has ∆H0 = −3226.7 kJ/mole. Use
1. 1 answer
2. asked by Austin
3. 1,846 views
7) Shoe sizes, such as 7B, 10D, and 12EEE, are examples of what level of measurement?A. Nominal B. Ordinal C. Interval D. Ratio
1. 6 answers
2. asked by JAZE
3. 1,827 views
Turner’s treadmill starts with a velocity of −1.9 m/s and speeds up at regular intervals during a half-hour workout.After 36
1. 1 answer
2. asked by Sonia
3. 1,795 views
grain is being poured through a chute at rate of 8 ft^3/min and forms a conical pile whose radius of the bottom is always 1/2
1. 1 answer
2. asked by Liz
3. 1,750 views
Suppose the Eskimo is pushing the same 50.0-kg sled across level terrain with a force of 51.5 N.If he does 3.85 102 J of work on
1. 2 answers
2. asked by Meghan
3. 1,686 views
A ball weighing 50N is pulled back by a rope to an angle of 20 degrees (the rope that the ball hangs from). Find the tension in
1. 1 answer
2. asked by Kristen
3. 1,661 views
Anne has 20 coins in her pocket consisting of nickels and dimes only. The total value of the coins is $1.45. How many nickels
1. 2 answers
2. asked by Anonymous
3. 1,607 views
You've just received an order of silk flower arrangements from your wholesaler. You paid $20.00 for them. Your store uses a 10%
1. 1 answer
2. asked by nana
3. 1,516 views
A patient with polycythemia vera(excess production of red cells) receives raioactive phosphorus-32. Why would this treatment
1. 1 answer
2. asked by Boo Boo
3. 1,504 views
a star has a size of 0.1 solar radius. How many times larger is the sun than this star
1. 3 answers
2. asked by asia
3. 1,459 views
A 2.33-g sample of a mixture of CaCl2 and Ca(NO3)2 is treated with excess AgNO3(aq). The precipitate is filtered off, dried and
1. 1 answer
2. asked by Kevin
3. 1,457 views
Sophia's monthly salary is $2300. She gives $500 to her parents and saves 30% of the remaining money. She spends the rest. How
1. 2 answers
2. asked by Student56
3. 1,444 views
73. A mobile is formed by supporting four metal butterflies of equal mass m from a string of length L. The points of support are
1. 0 answers
2. asked by audree
3. 1,421 views
The complete combustion of octane, C8H18, the main component of gasoline, proceeds as follows.2 C8H18(l) + 25 O2(g) �¨ 16
1. 2 answers
2. asked by rebekah
3. 1,333 views
Using the Clausius Clapeyron equation determine the vapor pressure of water at 50.0 degrees C. The molar heat of vaporization of
1. 1 answer
2. asked by Bianca
3. 1,289 views
3 boys, Aaron, Benny and Charles, share a sum of money. Aaron receives 40% of the sum of money. Benny receives 3 times as much
1. 1 answer
2. asked by Student56
3. 1,266 views
There are 175 pupils in a hall. 40% of them are boys. 25 girls enter the hall. What percentage of the pupils in the hall now are
1. 1 answer
2. asked by Student56
3. 1,251 views
How could you use a precipitation reaction to separate the following pair of cations: K^+ and Hg2 ^2+? (write the formula and
1. 1 answer
2. asked by Lydia
3. 1,242 views
#1. Make up a polynomial that has the following characteristics:crosses the x axis at 1 and 4, touches the x axis at 0 ad 2. and
1. 1 answer
2. asked by Rebekah
3. 1,231 views
Mamma Temte bakes six pies a day that cost $2 each to produce. On 15% of the days, she sells only two pies. On 27% of the days,
1. 0 answers
2. asked by Anonymous
3. 1,211 views
A ball is dropped from the top of a 49.0 -high cliff. At the same time, a carefully aimed stone is thrown straight up from the
1. 1 answer
2. asked by Yan
3. 1,183 views
the velocity acquired by a body moving with uniform acceleration is 12 m/s2 in 2 secs.and 18 m/s2 in 4 sec. find the initial
1. 1 answer
2. asked by vinay
3. 1,154 views
A 0.425-kg blue bead slides on a frictionless, curved wire, starting from rest at point where h = 1.50 m. At point , the blue
1. 0 answers
2. asked by tom
3. 1,152 views
1. The exam scores for the students in an introductory statistics class are as follows.88 63 90 64 82 98 96 75 89 86 76 84 70 67
1. 1 answer
2. asked by Anonymous
3. 1,117 views
. In testing a new drug, researchers found that 20% of all patients using it will have a mild side effect. A random sample of 15
1. 1 answer
2. asked by mom
3. 1,116 views
if u had used 40ml of water and 6g of ammonium nitrate ,rather than 20ml water n 3g ammonium nitrate. would u expect to get a
1. 1 answer
2. asked by hz
3. 1,096 views
An 18-year-old runner can complete a 10.0-km course with an average speed of 4.53 m/s. A 50-year-old runner can cover the same
1. 1 answer
2. asked by Anonymous
3. 1,094 views
A cart is propelled over an xy plane with acceleration components ax = 5.1 m/s2 and ay = -2.9 m/s2. Its initial velocity has
1. 3 answers
2. asked by tatiana
3. 1,045 views
Hi. I'm in 10th grade and our teacher assigned us a persuasive essay to write in class over a topic that we debated about for
1. 1 answer
2. asked by Bill
3. 1,029 views
The Lions Gate bridge in Vancouver is a suspension bridge. The main span between the two towers, is 427m long. Large cables are
1. 1 answer
2. asked by Hamza
3. 1,016 views
How do you calculate the degrees of freedom for unequal sample sizes and unequal variance (independent t test)
1. 1 answer
2. asked by maddy
3. 995 views
2/5 of the children in an art club were girls. 1/4 of the girls and 5/6 of the boys took part in a competition. 12 boys did not
1. 1 answer
2. asked by Unknown Error
3. 995 views
what can be considered as leadership and if it like clubs and job.what else it could be?
1. 0 answers
2. asked by noor
3. 971 views
A swimmer, capable of swimming at a speed of 1.97 m/s in still water (i.e., the swimmer can swim with a speed of 1.97 m/s
1. 2 answers
2. asked by pd
3. 952 views
an altitude of triangle is 5/3rd of the length of its corresponding base if their altitude be increased by 4cm and the base is
1. 2 answers
2. asked by TUHITUHI
3. 930 views
The function f(x) = ax^3-x^2+bx-24 has three factors. Two of these factors are x-2 and x+4. Determine the values of a and b, and
1. 1 answer
2. asked by Melissa
3. 924 views
1. How many moles of Al(CN)3 are in 199 g of the compound?2. 96.0 mol of P4O10 contains how many moles of P? 3. If 4.71 moles of
1. 0 answers
2. asked by Anonymous
3. 924 views
write 718.5 in scientific notation
1. 2 answers
2. asked by Bill
3. 915 views
If Jane can produce 3 pairs of shoes hourly, while Bob can produce 2, then one can infer that the __________ advantage belongs
1. 0 answers
2. asked by Blaze
3. 915 views
A rectangle is 4 inches longer than it is wide. It's perimeter is 28 inches. Write a system of two equations in two variables
1. 1 answer
2. asked by Anonymous
3. 909 views
Amy watched television for 2 3/4 hours. Charles watched television for 1/3 of the time Amy did. How long, in minutes did Charles
1. 6 answers
2. asked by Laruen
3. 905 views
The standard enthalpy of formation ofMn2O3 is −962.3 kJ/mol. How much heat energy is liberated when 4.7 grams of manganese are
1. 2 answers
2. asked by Sam
3. 895 views
calculate the mass of sodium hydroxide needed to prepare 100 ml of a .10 m solution
1. 0 answers
2. asked by mike
3. 886 views
. Find the mean and standard deviation of the following probability distribution:x 1 2 3 P(x) 0.4 0.25 0.35 Please show all of
1. 1 answer
2. asked by Anonymous
3. 875 views
10y^3+y^2-21y
1. 1 answer
2. asked by Kong
3. 869 views
Problem 1:Multiplication Drill Computers can perform calculations extremely quickly and accurately, but it's often handy to
1. 0 answers
2. asked by Jaizzer
3. 864 views
A train at a constant 68.0 km/h moves east for 41 min, then in a direction 65.0° east of due north for 22.0 min, and then west
1. 0 answers
2. asked by tatiana
3. 855 views
To what volume should you dilute 50ml of a 13M stock HNO3 solution to obtain a 0.131M HNO3 solution?
1. 1 answer
2. asked by YeJi
3. 846 views
i'm trying to solve this system of equations with 3 variables5a-b+3c=5 2a+7b-2c=5 4a-5b-7c=-65 i tried to make the first
1. 1 answer
2. asked by john
3. 842 views
Predict the boiling point of the following compound using Trouton's Rule:Heat of vaporization/Tb= 80 J/K Carbon tetrachloride
1. 1 answer
2. asked by Brunette
3. 837 views
A baseball leaves a pitcher's hand horizontally at a speed of 115 km/h. The distance to the batter is 18.3 m. (Ignore the effect
1. 1 answer
2. asked by tatiana
3. 832 views
A friend’s car has run out of gas and four of you are pushing the car to the gas station at a constant speed of 4.5 km/h. If
1. 1 answer
2. asked by RajO5
3. 830 views
The names of the positions in a corporation, such as chief operating officer or controller, are examples of what level of
1. 1 answer
2. asked by JAZE
3. 828 views
World energy supplies are often measured in the unit of quadrillion British thermal units (10^12 btu), generally called a
1. 2 answers
2. asked by M
3. 813 views
Of 55 students in the fifth grade, 43 are fans of the local basketball team and 35 are fans of the local hockey team. Twenty -
1. 3 answers
2. asked by Anonymous
3. 793 views
A tire placed on a balancing machine in a service station starts from rest and turns through 4.82 revolutions in 1.48 s before
1. 2 answers
2. asked by Emily
3. 765 views
Please find the next THREE numbers in the patterns and explain how you got them:1) 5, 5/2, 5/4, 5/8, 5/16.... 2) 1, -3, 9, -27,
1. 2 answers
2. asked by Kim
3. 760 views
An open topped box can be created by cutting congruent squares from each of the 4 corners of a piece of cardboard that has
1. 0 answers
2. asked by Melissa
3. 754 views
2 over x minus 3 is equal to 26 over xwhat is x? can u please help me
1. 1 answer
2. asked by Kiki
3. 746 views
A block is hung by a string from the inside roof of a van. When the van goes straight ahead at a speed of 20.0 m/s, the block
1. 1 answer
2. asked by Thien
3. 730 views
Use implicit differentiation to find dy/dx. e^4x = sin(x+2y).This is a practice problem. It says the correct answer is
1. 1 answer
2. asked by Travis
3. 723 views
What level of measurement is the number of auto accidents reported in a given month?
1. 1 answer
2. asked by JAZE
3. 714 views
Aspirin (C9H8O4) is produced from salicylic acid (C7H6O3), and acetic anhydride (C4H6O3):C7H6O3 + C4H6O3 �¨ C9H8O4 + HC2H3O2
1. 0 answers
2. asked by rebekah
3. 711 views
Helium-oxygen mixtures are used by divers to avoid the bends and are used in medicine to treat some respiratory ailments. What
1. 0 answers
2. asked by Ayesha
3. 707 views
A school has 1800 pupils. 55% of the pupils are girls. 30% of the girls and 70% pf the boys travel by bus.a.) How many girls
1. 1 answer
2. asked by Student56
3. 706 views
I need help understanding simple subjects and simple predicates. The sentence is: What is keeping them?I'm confused about which
1. 2 answers
2. asked by gracie
3. 705 views
A tennis ball with a velocity of +9.6 m/s to the right is thrown perpendicularly at a wall. After striking the wall, the ball
1. 1 answer
2. asked by Mackenzie
3. 704 views
A dog runs 150{\rm m} away from its master in a straight line in 8.4{\rm s} , and then runs halfway back in one-third the
1. 1 answer
2. asked by tony
3. 693 views
Balance the following redox reactions in acidic solution by the half-reaction method Br–(aq) + I–(aq) + HClO(aq) = Br2(l) +
1. 0 answers
2. asked by James
3. 673 views
A cyclist is coasting at a steady speed of 17 but enters a muddy stretch where the effective coefficient of friction is 0.60.
1. 1 answer
2. asked by Anonymous
3. 669 views
One mole of carbon (12.0 g) in the form ofcrystalline graphite is burned at 25 ◦ C and 1.000 atm pressure to form CO2(g). All
1. 1 answer
2. asked by Austin
3. 669 views
Calculate the amount (volume) of 0.135 M HClO4 solution required to neutralize 57.00 mL of .089 M NaOH
1. 1 answer
2. asked by Vicky
3. 666 views
what are some physical properties of stars
1. 3 answers
2. asked by candy
3. 655 views
a block of mass m=0.9 kg is connected to a spring of force constant k= 775 N/m on a smooth horizontal surface. plot the
1. 1 answer
2. asked by Mima
3. 655 views
during a water show the dolphin made a vertical jump of 2.5 m. Determine:a. The initial velocity they need to make that jump. b.
1. 0 answers
2. asked by daniela
3. 649 views
To what temperature in K must a variable volume container of helium gas be cooled to obtain a final volume of 0.182 L? The
1. 2 answers
2. asked by Anonymous
3. 647 views
A plane flies 475 km east from city A to city B in 50.0 min and then 986 km south from city B to city C in 1.00 h. For the total
1. 0 answers
2. asked by tatiana
3. 646 views
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 3.70 104 s. What is the
1. 1 answer
2. asked by Moises
3. 637 views
Pookie is listening to music through headphones so that no one else can hear it. When Pookie's sister walks into the room, he
1. 5 answers
2. asked by clara
3. 631 views
To what temperature in K must a variable volume container of helium gas be cooled to obtain a final volume of 0.182 L? The
1. 0 answers
2. asked by Anonymous
3. 628 views
(Bond valuation) A $1,000 face value bond has a remaining maturity of 10 years and a required return of 9%. "The bond's coupon
1. 0 answers
2. asked by Kim
3. 621 views
Kylie needs to cut 6 pieces of yarn that are each 2/3 foot long. How much yarn does Kylie need?2/3 x 6 right?
1. 4 answers
2. asked by Laruen
3. 619 views
A 5.0m ladder is leaning 3.1m up the wall. What is the angle the ladder makes with the ground?Would this be..... sinA=3.1/5.0
1. 1 answer
2. asked by Nikki
3. 613 views
Velocity/instantaneous velocity question?In a demonstration a ball falls directly to the ground. Which of the following
1. 1 answer
2. asked by Lewis
3. 603 views
1)Let X have a normal distribution with mean 6 and standard deviation 3. a) What is the probability that X > 8.72)What is the
1. 2 answers
2. asked by rachel
3. 600 views

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