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Questions Asked on February 3, 2013

A wooden block of mass m = 9 kg starts from rest on an inclined plane sloped at an angle θ from the horizontal. The block is
1. 1 answer
2. asked by Mike
3. 9,280 views
The cheetah can reach a top speed of 114km/h (71mi/h). While chasing its prey in a short sprint, a cheetah starts from rest and
1. 2 answers
2. asked by george
3. 7,960 views
An Alfa Romeo going at 70 mph requires 169 feet to stop. Assuming that the stopping distance is proportional to the square of
1. 2 answers
2. asked by Becky
3. 3,582 views
A subway train starting from rest leaves astation with a constant acceleration. At the end of 5.59 s, it is moving at 11.5154
1. 1 answer
2. asked by michael
3. 3,229 views
For the reaction of hydrazine (N2H4) in water, Kb is 3.0 10-6.H2NNH2(aq) + H2O(l)--> H2NNH3+(aq) + OH-(aq) Calculate the
1. 1 answer
2. asked by Daniel
3. 3,012 views
Can someone pls help me!!You decide to establish a new temperature scale on which the melting point of ammonia (-77.75 C ) is 0
1. 4 answers
2. asked by Greg
3. 2,947 views
The Brooklyn Bridge in New York City is a suspension bridge that crosses the East River and connects Brooklyn to the island of
1. 2 answers
2. asked by Vanessa
3. 2,912 views
Three identical capacitors are connected in series to a battery. If a total charge of Q flows from the battery, how much charge
1. 1 answer
2. asked by Liz
3. 2,827 views
An EDTA solution is standardized against a solution of primary standard CaCO3 (0.5622 g dissolve in 1000 ml of solution) and
1. 2 answers
2. asked by Anonymous
3. 2,797 views
Tarzan swings through the jungle by hanging from a vine. At the lowest point of a swing, Tarzan's acceleration is....A. zero B.
1. 2 answers
2. asked by sam
3. 2,722 views
A 1 mF, a 2 mF, and a 3 mF capacitor are connected in series, the combination being connected across a 9 volt battery. Which
1. 2 answers
2. asked by Liz
3. 2,717 views
Two point charges attract each other with an electric force of magnitude F. If one charge is reduced to 1/3 its original value
1. 2 answers
2. asked by P
3. 2,592 views
1..The first 2 terms of a geometric progression are the same as the first two terms of an arithmetic progression.The first term
1. 2 answers
2. asked by Lucas
3. 2,484 views
A lighthouse is located on a small island 3 km away from the nearest point P on a straight shoreline and its light makes four
1. 2 answers
2. asked by bryan
3. 2,480 views
if the heights of men follow a normal distribution, and 99.7% fall between 5" and 7" what is the estimate standard deviation of
1. 1 answer
2. asked by lena
3. 2,475 views
what do you think contributed to the jump in productivity among american workers during world war 2?
1. 3 answers
2. asked by raul
3. 2,436 views
How many pounds does 40.9 in3 of gold weigh? (The density of gold is 19.3 g/cm3, 2.54 cm = 1 in, and 454 g = 1 lb.)Note these
1. 6 answers
2. asked by Anonymous
3. 2,359 views
Given that 1st term of an A.P is 7 and it's 10th term is twice the second term,calculate the (a) 19th term (b)sum of 28 terms
1. 3 answers
2. asked by Benjamin
3. 2,067 views
When a light passes from glass to air, which of the following is correct for the path of the light?
1. 4 answers
2. asked by ............
3. 2,053 views
Current flow through a lamp is 1.3 A. How many Coulombs of charge are passed through the lamp in 2 minutes?Formula for coulombs
1. 1 answer
2. asked by Physics fail
3. 1,988 views
If a figure is a rectangle ABCD and the measure of angle ABD is 35 degrees what is the measure of the angles ABD CBD and BDC
1. 4 answers
2. asked by noahc
3. 1,919 views
what was necessary for the united states to be able to increase its production of war materials in a short period of time?
1. 4 answers
2. asked by alex
3. 1,824 views
how many grams of magnesium are required to react with 2.0 moles of hydrochloric acid?
1. 6 answers
2. asked by Z
3. 1,813 views
What is a Balanced equation for sulfur (IV) oxide (g) and magnesium oxide (cr)?
1. 1 answer
2. asked by Ashton
3. 1,778 views
A car sounding its horn (rated by the manufacturer at 600 Hz) is moving at 20 m/s toward the eat. A stationary observer is
1. 1 answer
2. asked by Patty
3. 1,682 views
an example of parallelism and page in to kill a mockingbird
1. 1 answer
2. asked by Taylor
3. 1,678 views
A parallel-plate capacitor is charged by a battery and then the battery is removed and a dielectric of constant K is used to
1. 1 answer
2. asked by Liz
3. 1,672 views
a) Sketch the phase line for the differential equationdy/dt=1/((y-2)(y+1)) and discuss the behavior of the solution with initial
1. 2 answers
2. asked by Erica
3. 1,609 views
A worker can supply a maximum pull of 150 lbs. on a cart which has a handle set an angle of 40degree above the horizontal. what
1. 1 answer
2. asked by glindyll
3. 1,598 views
Write the formula of the conjugate acid of base HCO3-,HPO2-,PO43-,SO32-
1. 1 answer
2. asked by baron
3. 1,591 views
assume that 13.5g of AL react with HCl according to the following equation, at STP: Al(s) + HCl(aq) ---> AlCl3 + H2(g) Remember
1. 10 answers
2. asked by kikie
3. 1,526 views
How to make 10% nitric acid? wouldnt it be 10 mL nitric acid + 100 mL of solvent, making it 10%? What molarity is used it to
1. 1 answer
2. asked by Merlina_Lyn
3. 1,519 views
How long did John sleep if he went to bed at 9:40 P.M., and got up at 7:20 A.M.?
1. 4 answers
2. asked by MALAYSHA
3. 1,501 views
A proton experiences a force of 4 Newton when it enters perpendicular to the direction of the magnetic field with a speed 100
1. 1 answer
2. asked by gaaaarh
3. 1,478 views
A bullet of mass 45 g is fired at a speed of 220 m/s into a 5.0-kg sandbag hanging from a string from the ceiling. The sandbag
1. 2 answers
2. asked by Khalifa
3. 1,468 views
1. 1 ml serum added to 5 ml saline. 1:2 dilution is made. What is the dilution of serum in tube 6?So the serum + saline would
1. 1 answer
2. asked by Anonymous
3. 1,467 views
Here is the question.Medical X-rays, with a wavelength of about 10^-10m, can penetrate completely through your skin. a.
1. 1 answer
2. asked by Dar
3. 1,454 views
1.00 g zinc and 0.80 g sulfur are allowed to react all the zinc is used up 1.50 g of zinc sulfide is formed and some unreacted
1. 2 answers
2. asked by tony
3. 1,449 views
For the reaction below, Kp = 1.16 at 800.°C.CaCO3(s) CaO(s) + CO2(g) If a 21.7-g sample of CaCO3 is put into a 10.6 L container
1. 1 answer
2. asked by gina
3. 1,415 views
A conductor of length 2m carrying a 1.5A current experiences a force of 2.2 N. What is the magnitude of the magnetic field that
1. 1 answer
2. asked by fred
3. 1,370 views
A projectile is fired at 45.0° above the horizontal. Its initial speed is equal to 42.5 m/s. Assume that the free-fall
1. 2 answers
2. asked by Julia
3. 1,347 views
Sort each spelling word by determining if it follows the v/vc or the vc/v pattern tyrant, equal, humor, recent, profile, linen,
1. 2 answers
2. asked by Jayden
3. 1,344 views
With a chemical test differentiate between H2SO4 and H2SO3
1. 1 answer
2. asked by raj
3. 1,334 views
A boat which travels 100 km (N), then 40 km (N), and finally 80 km (S). The entire trip takes 6.5 hours.A.) Calculate the total
1. 2 answers
2. asked by Amanda
3. 1,332 views
The circle x^2 y^2 2gx 2fy c=0 passes through the points A(-1,-2),B(1,2)and C(2,3). Write down three equation which must
1. 0 answers
2. asked by abews
3. 1,325 views
How many grams of K2Cr2O7 are required to prepare 500 ml of a 0.13 N solution?
1. 1 answer
2. asked by Anonymous
3. 1,291 views
What is the period and asymptote in y= tan(2x-pi)
1. 1 answer
2. asked by Betty
3. 1,278 views
A circular loop with 30 turns and area of 0.25 m2 rotates at 100 rad/s. The axis of rotation of the loop is perpendicular to the
1. 1 answer
2. asked by fred
3. 1,277 views
What is Combustion?this is not homework (please give me a good definition for 8th graders like me to understand) BTW - I'm
1. 1 answer
2. asked by Laruen
3. 1,248 views
A 1500 W room heater is used daily for 4 hours during winter. If the cost per kWh is $0.5, what is the monthly (30 days) expense
1. 1 answer
2. asked by help please?
3. 1,245 views
In the human body, blood travels faster in the largest blood vessel, the aorta than in any other blood vessel. Given an average
1. 2 answers
2. asked by Amanda
3. 1,226 views
Triangle ABC and triangle XYZ are similar. If AB, BC, and AC are 7 inches, 9 inches, and 10 inches respectively, andXY is 9
1. 1 answer
2. asked by Anonymous
3. 1,209 views
A watermelon cannon fires a watermelon vertically up into the air at a velocity of +11.5 m/s, starting from an initial position
1. 1 answer
2. asked by Kathy
3. 1,181 views
An arithmetic and a geometric sequence have the same first terms.(2)....and the same second term say X..The sum of the first 3
1. 1 answer
2. asked by Lucas
3. 1,159 views
A spotlight on the ground shines on a wall 12 m away. If a man 2 m tall walks from the spotlight toward the building at a speed
1. 1 answer
2. asked by bryan
3. 1,151 views
A 3 cu ft ballon is filled with air at 90 degrees F. How many cu ft will that same ballon contain one hour after it is taken
1. 0 answers
2. asked by Mustic Dicko
3. 1,144 views
NASA, space shuttles, and the International Space Station are(a)all related to Cold War spy technology (b) joint scientific
1. 6 answers
2. asked by Beth
3. 1,129 views
Oxygen gas and water are produced by the decomposition of hydrogen peroxide. If 10.0 mol of H2O2 decomposes, what volume of
1. 1 answer
2. asked by oscar
3. 1,122 views
Two positive charges of 6 �C are separated by a distance of 50 cm in air. What is the electric field strength at the midpoint
1. 2 answers
2. asked by help please?
3. 1,113 views
A barge is hauled along a straight-line section of canal by two horses harnessed to tow ropes and walking along the tow paths on
1. 1 answer
2. asked by Abdul
3. 1,084 views
The measures of two consecutive angles of a parallelogram are in the ratio 5:4. What is the measure of an acute angle of the
1. 1 answer
2. asked by Jay
3. 1,078 views
A 2.1 kg ball tied to a string fixed to the ceiling is pulled to one side by a force to an angle of è = 26.6how large is F?
1. 1 answer
2. asked by rat boy
3. 1,075 views
Show how you substitute the values into the formula, then use your calculator.*Use A = P(1+r/n)nt to find the amount of money in
1. 1 answer
2. asked by Sylvie
3. 1,072 views
: The manager of a food store wants to create a blend of herbs that she can sell for $1 per once. She decides to make 8 ounces
1. 1 answer
2. asked by Anonymous
3. 1,070 views
#1.) A 3.0 kg computer printer is pushed across a desk at a rate of 0.6m/ s2 (towards the right). Determine the force applied to
1. 0 answers
2. asked by AMANDAAA
3. 1,066 views
The drawings show three charges that have the same magnitude but different signs. In all cases the distance d between the
1. 1 answer
2. asked by Don
3. 1,051 views
A company uses the function C(x)= 20.50x+2000, where C is the cost and x is the number of units it produces, to determine its
1. 1 answer
2. asked by Anonymous
3. 1,046 views
1. The scores on a standardized test for high school students are normally distributed with a population mean of 500 and a
1. 2 answers
2. asked by lay
3. 1,037 views
An object of mass M is used to provide tension in a 4.5 m long string that has a mass of 0.252 kg. A standing wave that has a
1. 1 answer
2. asked by Jasmine
3. 1,033 views
A standard 1.000kg- mass is to be cut from a bar of steel having an equilateral triangular cross section with sides equal to
1. 4 answers
2. asked by Lisa
3. 1,029 views
A video store charges $2.75 per day for overdue videos. You owe a late fee of $13.75. How many days overdue is the video?
1. 1 answer
2. asked by Bonnie
3. 1,026 views
7 2/5 - 2 3/4 =I need to show how I got the answer
1. 3 answers
2. asked by JR
3. 999 views
The sum of the first n terms of a sequence is given by 4-4(1/2)^n.calculate the first 3 terms
1. 1 answer
2. asked by Lucas
3. 994 views
one farm is 82 acres larger than another.together the farms contain 276 acres how larg is each farm? solve using two variables
1. 1 answer
2. asked by Taylor
3. 993 views
The power in an electric circuit varies inversely with the resistance. If the power is 1200 watts when the resistance is 12
1. 7 answers
2. asked by Ashley
3. 987 views
factors affecting child development
1. 1 answer
2. asked by Anonymous
3. 983 views
find the mean number of heads in 3 tosses of a fair coin?
1. 0 answers
2. asked by Anonymous
3. 981 views
Graph the polygon and give the specific name for the polygon.A(-1,-2),B(0,3),C(1,-2)
1. 2 answers
2. asked by Vanessa
3. 979 views
If 25 grams of copper(II) sulfate pentahydrate were heated until all water was removed, how much residue would remain?- Could
1. 3 answers
2. asked by Shadow
3. 974 views
80ml of hcl is added to 2.5gm of pure cac03 when the reaction is over, then 0.5gm cac03 is left. Find the normality of the acidT
1. 1 answer
2. asked by Fai
3. 970 views
A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed
1. 0 answers
2. asked by Fred
3. 955 views
Two people start from rest at the same point. One walks east at 3 mi/h and the other walks northeast at 2 mi/h. How fast is the
1. 1 answer
2. asked by bryan
3. 939 views
In which of the following cases is the frequency of emitted radiation greatest?Electrons jump from third to second orbit
1. 1 answer
2. asked by gaaaarh
3. 922 views
Eric thinks of 2 sequences.One is geometric and the other arithmetic.Both sequences start with the number 3.The common ratio of
1. 2 answers
2. asked by Lucas
3. 911 views
A boat is pulled into a dock by a rope attached to the bow of the boat and passing through a pulley on the dock that is 1 m
1. 1 answer
2. asked by bryan
3. 908 views
A tortoise and hare start from rest and have a race. As the race begins, both accelerate forward. The hare accelerates uniformly
1. 1 answer
2. asked by gerry
3. 881 views
if a coin is tossed twice, how many times would the head appear?
1. 1 answer
2. asked by Anonymous
3. 871 views
A proton and an electron enter perpendicular to the direction of the magnetic field. The speed of the proton is twice the speed
1. 1 answer
2. asked by fred
3. 861 views
I need help please!!!On January 1, 2010, Chessville has a population of 50,000 people. Chessville then enters a period of
1. 2 answers
2. asked by Amber
3. 858 views
A cliff on the bank of a river is 300m high if angle of deprssion of a point on the oposite side of the river is 60 digree find
1. 3 answers
2. asked by MD
3. 852 views
Consider the standardization of a solution of K2Cr2O7 with iron metal according to the following:Reaction: Fe + Cr2O7-2 → Fe
1. 4 answers
2. asked by Anonymous
3. 850 views
A 3 cu ft ballon is filled with air at 90 degrees F. How many cu ft will that same ballon contain one hour after it is taken
1. 1 answer
2. asked by Mustic Dicko
3. 846 views
Which of the following is true for a photon?A photon of wavelength 3000 x 10-10 m has momentum twice than a photon of wavelength
1. 0 answers
2. asked by physics student
3. 839 views
Thomas the train and Diesel are involved in an elastic collision. A 2.5 kg Thomas is, at rest but is approached head-on by a 5.0
1. 0 answers
2. asked by Khalifa
3. 837 views
find the mean number of heads in 3 tosses of a fair coin?
1. 1 answer
2. asked by Anonymous
3. 828 views
1. The nerve center of the American Presidency is (C)the President’s Cabinet. the Executive Office of the President. the
1. 8 answers
2. asked by karen
3. 827 views
Please explain to me how I can do this .Sarah works in an appliance store. She gets a commission in addition to her hourly pay.
1. 1 answer
2. asked by Jessica
3. 823 views
one bag of rice weighs the same as 2 bags of salt or 3 bags of sugar. How many bags of rice are needed to balance 7 bags of salt
1. 1 answer
2. asked by HELP HELP HELP MNHS
3. 822 views
A guitar string has a tension of 100 N and is supposed to have a frequency of 110 Hz. When a standard tone of that value is
1. 1 answer
2. asked by Ryan
3. 818 views
Where reading the poem "LEGAL ALIEN" by Pat Mora . We have to find the rhythm,meter, and assonance . I cant fimd any of that in
1. 1 answer
2. asked by Anna
3. 817 views

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