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2011
February

Questions Asked on February 3, 2011

while on the moon, the Apollo astronauts enjoyed the effect of a gravity much smaller than that on earth. if Neil Armstrong
1. 5 answers
2. asked by Marissa
3. 7,672 views
A balloon, rising vertically with a velocity of 16 feet per second, releases a sandbag at the instant it is 64 feet above the
1. 3 answers
2. asked by Gabriel
3. 5,556 views
A worker pushes horizontally on a 2000 N refrigerator on a kitchen floor with a force of 28.0 N.A. If the refrigerator moves
1. 2 answers
2. asked by andrea
3. 5,085 views
1) Charges of +4uC and -6uC are placed at two corners of an equilateral triangle with sides of 0.10m. At the third corner, what
1. 2 answers
2. asked by Andrew
3. 5,066 views
Consider a wire of length L = 0.30 m that runs north-south on a horizontal surface. There is a current of I = 0.50 A flowing
1. 2 answers
2. asked by anip
3. 4,833 views
A 100 foot vertical tower is to be erected on a side of a hill that makes a 6 degree angle with the horizontal. Find the length
1. 1 answer
2. asked by Ash
3. 4,821 views
74. Road GradeWhen driving down a mountain road, you notice warning signs indicating that it is a "12% grade." This means that
1. 2 answers
2. asked by Sam
3. 3,999 views
A 60 g golf ball leaves the face of a golf club with a velocity of 75 m/s. If the club exerted an average force of 3.0 x 10^4 N,
1. 2 answers
2. asked by Sumita
3. 3,760 views
a 900 N running back moving at 2.0 m/s is stoppped in 0.70 seconds when hit by a lineback. What average foarce did the
1. 2 answers
2. asked by Nabil
3. 3,481 views
A student is about to do a push-up. Hercenter of gravity lies directly above P on the ﬂoor, which is 1.1 m from her feet and
1. 1 answer
2. asked by monica
3. 3,473 views
Twelve identical point charges are equally spaced around the circumference of a circle of radius 'R'. The circle is centered at
1. 4 answers
2. asked by Crystal
3. 3,247 views
Karen can be paid in one of two ways for selling insurance policies:Plan A:A salary of $750 per month, plus a commission of 10%
1. 3 answers
2. asked by Chris
3. 2,977 views
A force F is required to push a crate along a rough horizontal floor at a constant speed V with friction present.What force is
1. 5 answers
2. asked by andrea
3. 2,893 views
what is the percent by mass of oxygen in propanal, CH3CH2CHO?the answer is 27.6 %. but i need to know why, please help !
1. 1 answer
2. asked by lisa
3. 2,824 views
A car starts from rest and travels for t1 seconds with a uniform acceleration a1. The driver then applies the brakes, causing a
1. 1 answer
2. asked by Anonymous
3. 2,459 views
is SiS2 polar or nonpolar?Why? I think its non but when I searched it people were saying polar thanks:)
1. 1 answer
2. asked by Rebekah
3. 2,364 views
. License plates are made using 2 letters followed by 3 digits. How many different plates can be made if repetition of letters
1. 3 answers
2. asked by Myrna
3. 2,341 views
The first sentence of your introductory paragraph should do all of the following EXCEPT:A.Give the reader an idea of the subject
1. 5 answers
2. asked by elena
3. 2,233 views
One side of a rectangle is 12 inches, and the other side is x inches.What values of x will make the perimeter at most 44 inches?
1. 1 answer
2. asked by jessi
3. 2,132 views
4. The scores on a university examination are normally distributed with a mean of 62 and a standard deviation of 11. If the
1. 1 answer
2. asked by loni
3. 2,088 views
Two horizontal forces, F1 and F2, are acting on a box, but only F1 is shown in the drawing. F2 can point either to the right or
1. 2 answers
2. asked by Tiffany
3. 2,061 views
The heat capacity of liquid water is 4.18 J/g•C and the heat of vaporization is 40.7 kJ/mol. How many kilojoules of heat
1. 2 answers
2. asked by Dorian
3. 2,046 views
A 10 kg quantity of a radioactive isotope decays to 3 kg after 17 years. Find the decay constant of the isotope.
1. 1 answer
2. asked by Eric
3. 1,975 views
The area of a rectangle is 128 in².If the length is twice the width, what is the length of the rectangle? A) 64 in. B) 16 in.
1. 5 answers
2. asked by AP
3. 1,731 views
A bicyclist is coasting straight down a hill at a constant speed. The mass of the rider and bicycle is 85.0 kg, and the hill is
1. 1 answer
2. asked by Lauren
3. 1,671 views
a farmer wants to build a rectangular pen using a side of a barn and 60ft of fence. find the dimensions and area of the largest
1. 4 answers
2. asked by joe
3. 1,658 views
Edwards struck fear into the hearts of his listeners in order to persuade them to act to avoid everlasting torment. Which
1. 2 answers
2. asked by unknows
3. 1,586 views
john's paint crew knows from experience that its 18 ft ladder is particularly stable when the distance from the ground to the
1. 4 answers
2. asked by alexa
3. 1,559 views
One strategy in a snowball fight is to throwa snowball at a high angle over level ground. While your opponent is watching this
1. 1 answer
2. asked by emily
3. 1,500 views
A Ferris wheel with radius 14.0 m is turning about a horizontal axis through its center, as shown in the figure below. The
1. 1 answer
2. asked by andrea
3. 1,469 views
If a 2.15-g sample of gas occupies 750. mL at STP, what is the molar mass of the gas at 125 degrees celcuis
1. 1 answer
2. asked by kris
3. 1,465 views
Use the Intermediate Value Theorem to prove that the equation has a solution. Then use a graphing calculator or computer grapher
1. 1 answer
2. asked by Kelly
3. 1,446 views
Two ice skaters stand at rest in the center of an ice rink. When they push off against one another the 61 kg skater acquires a
1. 3 answers
2. asked by emma
3. 1,423 views
The electrons in a TV tube are accelerated from rest through a potential difference of 18kV. Esimate the speed of the electrons
1. 2 answers
2. asked by tony
3. 1,407 views
Consider the flasks diagrammed below. What is the total pressure in torr after the stopcock between the two flasks is opened?
1. 1 answer
2. asked by K
3. 1,395 views
square x has an area of 100 square units. Square Y has a perimeter that is half of the perimeter of square x. What is the area
1. 2 answers
2. asked by Esther
3. 1,389 views
A. What is the mass of a book that weighs 3.20 N in the laboratory?B.In the same lab, what is the weight of a dog whose mass is
1. 1 answer
2. asked by andrea
3. 1,387 views
a gun tilted upward at 30 degrees fires a bullet with a speed of 215 m/s. what is the bullets velocity parallel to the ground
1. 1 answer
2. asked by vicki
3. 1,378 views
If a 2.15-g sample of gas occupies 750. mL at STP, what is the molar mass of the gas at 125 degrees celcuis
1. 0 answers
2. asked by kris
3. 1,377 views
The one-to-one function f is defined by f(x)=(4x-1)/(x+7).Find f^-1, the inverse of f. Then, give the domain and range of f^-1
1. 3 answers
2. asked by Rachal
3. 1,376 views
Consider the 668 N weight held by two cables shown below. The left-hand cable had tension T2 and makes an angle of pheta 2 with
1. 1 answer
2. asked by mazine
3. 1,373 views
A model sailboat is slowly sailing west across a a pond at.33m/s. a gust of wind blowing at 28 degrees south of west gives the
1. 0 answers
2. asked by cindy
3. 1,316 views
The velocity function is v(t) = t^2 - 6 t + 8 for a particle moving along a line. Find the displacement and the distance
1. 1 answer
2. asked by Anonymous
3. 1,313 views
Which of the following will help you produce clear and effective writing?A. Brainstorming before writing. B. A rubric that
1. 2 answers
2. asked by elena
3. 1,307 views
The first step in acquiring knowledge is often the observation or measurement of some aspect of nature.a. True b. False
1. 2 answers
2. asked by Jane
3. 1,276 views
Part (a) of the drawing shows a bucket of water suspended from the pulley of a well; the tension in the rope is 55.2 N. Part (b)
1. 0 answers
2. asked by Tiffany
3. 1,200 views
A meteorite has landed at UOIT! Chemical analysis shows that it contains 1gram of potassium and 1E-5 grams of argon, assumed to
1. 0 answers
2. asked by amy
3. 1,171 views
What is the length of the midsegment of the trapezoid made by the vertices A(0, 5), B(3, 3), C(5, -2) and D(-1, 2). Show
1. 1 answer
2. asked by Ethan
3. 1,158 views
what was the Red Scare?
1. 1 answer
2. asked by t.n.t
3. 1,153 views
A person pushes on a 60-kg refrigerator with a horizontal force of -260 N; the minus sign indicates that the force points in the
1. 1 answer
2. asked by Tiffany
3. 1,132 views
Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the
1. 1 answer
2. asked by Tiffany
3. 1,132 views
Far from any gravity, an astronaut accidentally releases a metal wrench inside a spaceship that is traveling at a constant
1. 0 answers
2. asked by andrea
3. 1,132 views
one of your friends is heading north for a holiday and the other is heading south . If their destinations arre 1029 miles apart
1. 2 answers
2. asked by pammy
3. 1,127 views
According to Richard Graham in "SR-71 Revealed: The Inside Story", the Lockheed SR-71 Reconnaissance plane accelerates from a
1. 2 answers
2. asked by Anonymous
3. 1,085 views
alot of my questions deal with speed and height. what are the different types formula I can use to figure these things out
1. 1 answer
2. asked by Ashely
3. 1,085 views
suppose the endpoints of one side of a rotated square are (-5,-5) and (1,-1). Find the dimensions and area of the square
1. 1 answer
2. asked by katrina
3. 1,079 views
does the current republican party platform address the needs of the average american?
1. 2 answers
2. asked by sara
3. 1,064 views
Can you construct a triangle of side lengths of 7 inches, 8 inches, and 15 inches?
1. 3 answers
2. asked by Elizabeth Franco
3. 1,062 views
A 3kg mass moving initially to the right along the x axis with a speed of 8m/s makes a perfectly inelastic collision with a 5kg
1. 1 answer
2. asked by Joel
3. 1,044 views
The length of the side of a rectagular desk is given by 9x-2y cm.The length of the front is given by 9x+2ycm. What is an
1. 2 answers
2. asked by kim
3. 1,037 views
HiPlease help Initial [Fe3+] = 0.00050 M Initial [SCN-] = 0.0010 M Equilibrium [Fe(SCN)2+] = 5.7 x 10-5 Find [Fe3+]E and [SCN-]E
1. 1 answer
2. asked by Sara
3. 1,036 views
If mixing baking soda, (NaHCO3) with vinegar (CH3COOH) to generate carbonic acid (H2CO3), which breaks up into water and carbon
1. 2 answers
2. asked by Pedro
3. 1,030 views
A 109 kg fullback runs at the line of scrimmage.(a) Find the constant force that must be exerted on him to bring him to rest in
1. 1 answer
2. asked by Anonymous
3. 1,022 views
The composite scores of students on the ACT college entrance examination in a recent year had a Normal distribution with mean µ
1. 2 answers
2. asked by Erica L
3. 1,020 views
The Everton college store paid $1668 for an order of 44 calculators. The store paid $8 for each scientific calculator. The
1. 1 answer
2. asked by Tinamarie
3. 1,007 views
The Sum Is a Third Vector A, which is directed along an x axis, is to be added to vector B, which has a magnitude of 3.5 m. The
1. 0 answers
2. asked by jake 12
3. 994 views
Bob's Barber shop estimates their gross revenue for the second qaurter to be given by the polynomial 9x^3+4x^2-6x+9. The shop
1. 1 answer
2. asked by lisa
3. 989 views
Maxine is studying about electrolytes in her chemistry class. The teacher asks her to test 4 different solutions to determine
1. 0 answers
2. asked by Help
3. 989 views
A steel cylinder contains 98.0 moles of oxygen gas at temperature of 38 degree Celsius and a pressure of 740 torr. After some of
1. 0 answers
2. asked by K
3. 987 views
A 180 ft long board is cut into 3 pieces. The second piece of board is twice as long as the first. The third piece of board is
1. 2 answers
2. asked by AP
3. 987 views
A compound contains only hydrogen and nitrogen and is 12.6% hydrogen by mass. A gaseous sample of the compound has density of
1. 0 answers
2. asked by K
3. 979 views
A severe thunderstorm dumped 2.9 in. of rain in 30 min on a town of area 32 km2. What volume of water, in acre-feet, fell on the
1. 1 answer
2. asked by Anonymous
3. 977 views
The drawing shows a 29.7-kg crate that is initially at rest. Note that the view is one looking down on the top of the crate. Two
1. 1 answer
2. asked by Tiffany
3. 970 views
The engines of a 1.20 x 10^5 N rocket exert an upward thrust of 2.00 x 10^5 N for 1.50 minutes upon lift off.What is the impulse
1. 0 answers
2. asked by Maria
3. 968 views
Where was the site for the Battle of Gettysburg in the Civil War? Thanks!
1. 3 answers
2. asked by Lina
3. 963 views
Solve the following initial value problem explicitly:y'= ye^-x , y(0)=1 How do you solve this problem? I'm really confused!
1. 1 answer
2. asked by Tania
3. 963 views
How do u find the widths of a triangle if their areas are less than or eqaul to 1200 in sqaured??
1. 1 answer
2. asked by Tameka
3. 963 views
I am trying to find the coordinates of a point in a line. I have one end, and I have the midpoint. What formula should I use to
1. 1 answer
2. asked by Dawn
3. 959 views
Please help me about solving kuadratic equations: X^2-2(1-3m)x+7(3+2m)=0 Find m parametter that equations to have the same
1. 0 answers
2. asked by Defrim
3. 958 views
In the drawing, the weight of the block on the table is 430 N and that of the hanging block is 165 N. Ignore all frictional
1. 0 answers
2. asked by Lauren
3. 949 views
The product of r and 8. How would you write that?
1. 2 answers
2. asked by kaylynn
3. 937 views
I am given four pictures and I am asked to determine which are needs and which are wants. They are:-An airplane -A plate of
1. 2 answers
2. asked by Jeff
3. 936 views
A 10 kg quantity of a radioactive isotope decays to 3 kg after 17 years. Find the decay constant of the isotope.
1. 1 answer
2. asked by Eric
3. 930 views
The formula for epson salts is MgSO4*7H2O. If 1.250 g of the compound is dissolved in water, calculate the number of milliliters
1. 1 answer
2. asked by Melissa
3. 927 views
The Everton college store paid $1668 for an order of 44 calculators. The store paid $8 for each scientific calculator. The
1. 2 answers
2. asked by Tinamarie
3. 923 views
(5x2 -4x)(3x2+2x)
1. 5 answers
2. asked by Dawn
3. 909 views
A sample of oxygen gas is collected by displacing water from an inverted bottle as shown in the diagram below. The volume of
1. 0 answers
2. asked by K
3. 908 views
How many moles of nitric acid will be produced when 0.35 moles of water reacts?
1. 1 answer
2. asked by Brittany
3. 908 views
A box must have base x cm by 2x cm. what are the dimensions of the box of maximum volume if its length+width+depth<140cm
1. 1 answer
2. asked by srishti
3. 900 views
identify the properties1.) if a=b and c=d then ac=bd 2.) c(d+e) = cd+ce 3.) if c=d and d=e ten c=e 4.) if x=y and p=q then
1. 0 answers
2. asked by amy
3. 898 views
If n=36, s=9 and t=2, what is the values of Xbar?
1. 1 answer
2. asked by Anonymous
3. 886 views
what factors affect climate?name and describe one of the climate regions of the united states. read climate and people. then
1. 2 answers
2. asked by gabriela
3. 881 views
The composite scores of students on the ACT college entrance examination in a recent year had a Normal distribution with mean µ
1. 1 answer
2. asked by Erica L
3. 876 views
I need help "translating" this part into more simple english from the poem One Step at a Time by Joseph Morris. Here is the
1. 1 answer
2. asked by Elizabeth
3. 874 views
A secretary at the police department makes $8 less per hour than the dispatcher. The combined hourly wage of the secretary and
1. 1 answer
2. asked by AP
3. 865 views
Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (substrate) to form an
1. 0 answers
2. asked by Angel
3. 851 views
The one-to-one function f is defined by f(x)=(4x-1)/(x+7).Find f^-1, the inverse of f. Then, give the domain and range of f^-1
1. 1 answer
2. asked by Rachal
3. 847 views
A 10 kg quantity of a radioactive isotope decays to 3 kg after 17 years. Find the decay constant of the isotope.
1. 1 answer
2. asked by Eric
3. 847 views
In the diagram shown the pulley at frictionless and the cylindrical load weighs 800.A. Determine the tension in the cable. B.
1. 1 answer
2. asked by ali
3. 841 views
CaO(s) reacts with SO2(g) according to the following equations: CaO9(s)+So2(g)--> CaSO3(g).A 8.85g mixture containing CaO(s) is
1. 0 answers
2. asked by K
3. 837 views

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