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Questions Asked on October 21, 2012

A uniform horizontal rod of mass M and length l rotates with angular velocity w (omega) about a vertical axis through its
1. 2 answers
2. asked by Daniel
3. 7,773 views
If the standard enthalpy of combustion of octane, C8H18(l) is -5471 kJ/mol, calculate the enthalpy change when 1.00 kg of octane
1. 1 answer
2. asked by Sam
3. 7,020 views
The drawing shows a jet engine suspended beneath the wing of an airplane. The weight W of the engine is 12000 N and acts as
1. 1 answer
2. asked by Annie
3. 6,688 views
I have a question about this one2N2O(g) ⇋ O2(g) + 2N2(g), what happens to the equilibrium position if the pressure decreases?
1. 4 answers
2. asked by alex
3. 6,222 views
The gravitational field strenght on the moon is 1.63N/kg. If a rock on the moon weights 2000N, how much does the same rock weigh
1. 1 answer
2. asked by Jason
3. 4,938 views
A footballl is thrown directly toward a receiver with initial speed of 18.0 m/s At an angle of 35.0 degrees above the
1. 1 answer
2. asked by Mollie
3. 4,315 views
A 150N block rests on a table. The suspended mass has a weight of 73N.a) What is the magnitude of the minimum force of static
1. 2 answers
2. asked by Peter
3. 3,669 views
Mass (before reaction): test tube + HCl(aq) + stir bar + capsule 26.600 gMass (after reaction): test tube + HCl(aq) + stir bar +
1. 2 answers
2. asked by Karina
3. 3,078 views
Suppose that a stable element with atomic number 119, symbol Wr, has been discovered.(a) Write the ground-state electron
1. 2 answers
2. asked by Lily
3. 2,954 views
A child has a temperature of 101◦F.If her total skin area is 13 m2, find the en- ergy loss per second due to radiation, assum-
1. 2 answers
2. asked by Lee
3. 2,836 views
#1For what positive numbers will the cube of a number exceed four times its square? #2 For what positive numbers will the cube
1. 1 answer
2. asked by Rebekah
3. 2,789 views
A sample of n _ 11 scores has a mean of M _ 4. One person with a score of X _ 16 is added to the sample.What is the value for
1. 2 answers
2. asked by Sharon
3. 2,657 views
explain which is more accurate: measuring to the nearest millimeter or to the nearest eighth of an inch
1. 5 answers
2. asked by Taylor
3. 2,471 views
At the halftime show, a marching band marched in formation. The lead drummer started at a point with coordinates (–2, –5)
1. 2 answers
2. asked by Delilah
3. 2,338 views
MegaMart collects a sales tax equal to 1/16 of the retail price of each purchase and sends this money to the state government.a.
1. 9 answers
2. asked by Cassidy
3. 2,258 views
A positive charge of 3.50 µC is located in an electric field of intensity 3.00 N/C directed toward the south. Find the
1. 2 answers
2. asked by john smith
3. 1,965 views
a 0.2kg rubber ball is dropped from the window of a building. It strikes the sidewalk below at 30 m/s and rebounds up at 25 m/s.
1. 1 answer
2. asked by Jazmin
3. 1,946 views
Calculate the theoretical yield in moles of Fe(C5H7O2)3 for this experiment. Record this number on your data sheet.Calculate the
1. 1 answer
2. asked by Anonymous
3. 1,935 views
1. Because there was a reawakening of interest in art, literature, and science between 1300 and 1600, it is fitting to call this
1. 15 answers
2. asked by all about me
3. 1,878 views
the sclae on a map is 1in:25mi. You measure 6.5in,between two towns what is the actual distance
1. 5 answers
2. asked by Taylor
3. 1,826 views
when is the absolute value of a difference equal to the difference of the absolute values? Explain
1. 1 answer
2. asked by Taylor
3. 1,815 views
Graph the following function. Find and state the domain, intercepts, asymptotes, intervals of increase and decrease, local
1. 1 answer
2. asked by Devin
3. 1,808 views
whatis the unit price of 40 ounces for $12
1. 1 answer
2. asked by kyla
3. 1,623 views
the following acid—base neutralization reactionHNO3 (aq)+ KOH (aq) --KNO3(aq) + H2O (I) What is the molarity (M) of an HNO3
1. 1 answer
2. asked by Tasha
3. 1,527 views
When 10.0 g of ammonium nitrate (molar mass= 80 g/mol) are dissolved in 1.00 L of water in a bomb calorimeter with a heat
1. 1 answer
2. asked by Sam
3. 1,507 views
If the standard enthalpy of combustion of octane, C8H18(l) is -5471 kJ/mol, calculate the enthalpy change when 1.00 kg of octane
1. 2 answers
2. asked by Sam
3. 1,503 views
A classroom has a floor area of 600 square feet. What is the floor area of the classroom in square meters? describe three
1. 0 answers
2. asked by Chelsea
3. 1,452 views
1. Two concentric conducting spherical shells have radii of 0.145 m. and 0.215 m. The inner sphere bears a charge of -3.00E-08
1. 2 answers
2. asked by andrew
3. 1,378 views
Solve:3 log 10^x = 4.2 the 10 is underneath the log I got a weird number in scientific notation. 2.511... X 10^9
1. 1 answer
2. asked by Sam
3. 1,365 views
It is noon. A secret agent is driving a jeep through the desert in the tiny principality of Alta Loma. He is 32km from the
1. 2 answers
2. asked by Alison
3. 1,338 views
Two moles of Mg and five moles of O2 are placed in a reaction vessel, and then the Mg is ignited to produce Mg (F.W.= 40.31
1. 2 answers
2. asked by Shelby
3. 1,337 views
How many five digit numbers can be formed from the set of nine numbers (0,1,2,3,4,5,6,7,8) if no number is repeated and no
1. 2 answers
2. asked by Carol
3. 1,332 views
You have just isolated a new radioactive element. If you can determine its half-life, you will win the Nobel Prize in physics.
1. 1 answer
2. asked by Roseanne
3. 1,328 views
At 1 atm, how much energy is required to heat 49.0 g of H2O(s) at –12.0 °C to H2O(g) at 169.0 °C?
1. 2 answers
2. asked by yas
3. 1,321 views
Please show me how to work!Ethane, C2H6(g) can be made by reaction of hydrogen gas with acetylene, C2H2(g). the standard
1. 1 answer
2. asked by Sam
3. 1,314 views
A capacitor has a charge of 5 µC when charged by a potential difference of 1.5 V. What is the capacitance of the capacitor?3.3x
1. 1 answer
2. asked by Derp
3. 1,312 views
A object-spring system undergoes simple harmonic motion with an amplitude of A. Does the total energy change if the mass is
1. 1 answer
2. asked by roro
3. 1,276 views
If the standard enthalpy of formation of PH3(g) is +5.4 kJ mol-1, calculate the reaction enthalpy for2PH3(g)--->2P(s)+3H2(g)
1. 1 answer
2. asked by Sam
3. 1,231 views
A ski starts from rest and slides down 22 degree incline 75 m long.If the coefficient of friction is .090 what is the ski's
1. 0 answers
2. asked by SP
3. 1,229 views
A certain 0.92 kg object will reach terminal velocity after 0.75 seconds. What is the speed of its terminal velocity and what is
1. 0 answers
2. asked by Lauren
3. 1,199 views
The standard enthalphies of formation of ozone, O3(g), and oxygen atoms are +142.70 and +249.17 kJ/mol. Calculate the reaction
1. 1 answer
2. asked by Sam
3. 1,198 views
A mixture of C3H8 and C2H2 has a mass of 2.0g . It is burned in excess O2 to form a mixture of water and carbon dioxide that
1. 1 answer
2. asked by Crystal
3. 1,180 views
if rock A is dropped from a cliff and rock B is thrown downward off the cliff, which of the two has a greater velocity?
1. 1 answer
2. asked by Barbara
3. 1,145 views
A girl coasts down a hill on a sled, reaching level ground at the bottom with a speed of 6.7 m/s. The coeﬃcient of kinetic
1. 1 answer
2. asked by George
3. 1,121 views
Suppose that a stable element with atomic number 119, symbol Wr, has been discovered.(d) What would be the most likely charge of
1. 3 answers
2. asked by Dave
3. 1,101 views
During a baseball game, a batter hits a high pop-up. If the ball remains in the air for 4.11 s, how high does it rise?
1. 2 answers
2. asked by Kayla
3. 1,094 views
What is the gravitational potential energy of a 5kg object resting 3m above the ground?
1. 1 answer
2. asked by Drake
3. 1,085 views
Beth, a construction worker, attempts to pulla stake out of the ground by pulling on a rope that is attached to the stake. The
1. 2 answers
2. asked by AJ
3. 1,075 views
An arrow is launched upward with a velocity of 54 feet per second from the top of a 75 foot building. What is the maximum height
1. 1 answer
2. asked by Randi
3. 1,066 views
Two resistors 10 Ω and 5 Ω are connected in parallel across a 15 V battery. What is the potential difference across the 10 Ω
1. 0 answers
2. asked by Herp
3. 1,065 views
The time needed for a water wave to change from the equilibrium level to the crest is 0.4185 s.What fraction of a wavelength is
1. 2 answers
2. asked by Aj
3. 1,063 views
Consult Multiple Concept Example 10 in preparation for this problem. Traveling at a speed of 18.7 m/s, the driver of an
1. 1 answer
2. asked by Daman
3. 1,046 views
Hey guys stumped on this one \HELP PLEAZE A.S.A.P.minimize p= 15x +18y subject to x+2y<=20 3x + 2y>= 36 x>=0 y>=0
1. 0 answers
2. asked by garnel
3. 1,018 views
The following chart shows the fraction of students who enjoy baseball, basketball, football, soccer, and swimming in the 7th
1. 3 answers
2. asked by Bethany
3. 1,004 views
Joey has a toy car that is a 1:64 scale model of an actual car. (In other words, the length of the actual car is 64 times as
1. 1 answer
2. asked by Elizabeth Barnes
3. 999 views
A man claims he can safely hold on to a 14.20 kg child in a head-on collision with a relative speed of 132. mi/h lasting for
1. 0 answers
2. asked by Anonymous
3. 990 views
A international phone call cost a fixed amount for the first minute and a certain rate per each additional minute. If a 7 minute
1. 1 answer
2. asked by Jamese
3. 985 views
A baseball coach shouts loudly at an umpire standing 3.6 meters away.If the sound power produced by the coach is 2.2×10−3 W,
1. 0 answers
2. asked by Aj
3. 983 views
What property must a substance have if u want to use the substance to make an aqueous solution?Thank you
1. 2 answers
2. asked by Seastone
3. 977 views
Use principles of atomic structure to Explain why in aqueous solution,(a) potassium forms 1+ but not a 2+ ion (a) Ti3+ is
1. 2 answers
2. asked by Lily
3. 963 views
Based on the following chemical equation answer the question below show all your calculationThe balanced chemical reaction of
1. 3 answers
2. asked by Tasha
3. 955 views
Suppose a shipment of 500 machine parts contains 62 defective and 438 non-defective machine parts. From the shipment you take a
1. 0 answers
2. asked by laura
3. 955 views
4. After being told that she is being punished for lying, a child responds by telling her mother that she also lied. This
1. 2 answers
2. asked by Sam
3. 953 views
1. Because there was a reawakening of interest in art, literature, and science between 1300 and 1600, it is fitting to call this
1. 16 answers
2. asked by all about me
3. 945 views
The force shown in the force vs. time diagram in the figure below acts on a 1.10 kg object. Find:(a) the impulse of the force
1. 0 answers
2. asked by Anonymous
3. 940 views
A person wants to push a lamp (mass 7.2 kg) across the floor, for which the coefficient of friction is 0.23. Calculate the
1. 0 answers
2. asked by Olivia
3. 923 views
a skier moving at 15 m/s down a 20 degree slope encounters a region of wet snow of coefficient of friction is 0.8. how far down
1. 2 answers
2. asked by Jazmin
3. 923 views
A wind is blowing directly from east to west. The pilot of a small plane finds that if he points the nose of the plane 30.0 °
1. 0 answers
2. asked by Anonymous
3. 920 views
When is the absolute value of a difference equal to the difference equal to the difference of the absolute values? Explain
1. 1 answer
2. asked by Taylor
3. 905 views
Can you check my answers please?1. Which continents do not cross the equator? North America, Europe, Australia, and Antarctica
1. 1 answer
2. asked by Reed
3. 890 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. 1 answer
2. asked by Derp
3. 890 views
A child has a temperature of 101◦F.If her total skin area is 13 m2, find the en- ergy loss per second due to radiation, assum-
1. 0 answers
2. asked by Lee
3. 875 views
Nurse erika needs to prepare 12 liters of a 10% saline solution. The stockroom only has 7 % and 15% saline solutions. How much
1. 1 answer
2. asked by sh
3. 873 views
how do the names of covalent compounds differ from the names of ionic compounds?
1. 1 answer
2. asked by Boo Boo
3. 869 views
Input. Output12. 10 16 32. 62. 35 70. 39 86 What is the rule I am in 5 th grade and have no clue
1. 1 answer
2. asked by Lily
3. 864 views
Using the molar volume (STP) or the ideal gas law equation, determine the molar mass,g/mole, of each of the following.A: 11.2g
1. 1 answer
2. asked by Will
3. 863 views
For y= 2x squared + x - 1 the x-intercepts and the turning point respectively are?
1. 1 answer
2. asked by Charlie
3. 852 views
Can you check my answers please?1.In what hemispheres is Africa located? Northern, Southern, Eastern, and Western 2. What is the
1. 1 answer
2. asked by Reed
3. 845 views
6.In which quadrant is the point (x, y) located if x is negative and y is positive? (1 point) II III IV I At the halftime show,
1. 4 answers
2. asked by Delilah
3. 833 views
A coffee dealer mixed 12 pounds of one grade coffee with 10 pounds of another grade of coffee to obtain a blend worth $54. He
1. 2 answers
2. asked by Jamese
3. 828 views
MegaMart collects a sales tax equal to 1/16 of the retail price of each purchase and sends this money tp the state government.a.
1. 7 answers
2. asked by Cassidy
3. 823 views
A certain weak base has a Kb of 9.00 × 10-7. What concentration of this base will produce a pH of 10.34?
1. 1 answer
2. asked by Kelly
3. 816 views
A skyrocket explodes 77 m above the ground. Three observers are spaced 106 m apart, with observer A directly under the point of
1. 0 answers
2. asked by Aj
3. 804 views
A force of 50 N accelerates a 5.0 kg block at 6.0 m/s2 along a horizontal surface.(a) What is the frictional force acting on the
1. 1 answer
2. asked by HanuPhysics
3. 799 views
What is the mass of a paratrooper who experiences an air resistance of 400 N and an acceleration of 4.5 m/s2 during a parachute
1. 2 answers
2. asked by HanuPhysics
3. 788 views
explain why a precipitate forms when silver nitrate solution is added to sodium chloride solution?
1. 2 answers
2. asked by vicky
3. 787 views
A jar contains six red marbles, four green marbles and five yellow ones.a) determine the number of ways in which any thee
1. 0 answers
2. asked by Carol
3. 787 views
Solve7^3x=623
1. 4 answers
2. asked by Sam
3. 779 views
a flight attendant pulls her 70 kg flight bag in an airport terminal holding the handle 50 degrees above the horizontal. she
1. 0 answers
2. asked by chad
3. 778 views
Radius of earth 3,959 milesSpace shuttle orbits 200 miles above earths Surface Space shuttle completes 220 degrees of a
1. 1 answer
2. asked by Chris
3. 776 views
Calculate the de Broglie wavelength associated with a body of mass 1.5 kg moving with a velocity of 100m/s.
1. 1 answer
2. asked by Sparkle
3. 770 views
Calculate the number fo moles of NaOH(aq) needed to react completely with 125 mL fo 6.00 M H2SO4(aq)
1. 1 answer
2. asked by Sam
3. 759 views
A block of mass 0.86 kg is suspended by a string which is wrapped so that it is at a radius of 0.061 m from the center of a
1. 0 answers
2. asked by Emily
3. 751 views
What property must a substance have if u want to use the substance to make an aqueous solution?Grade- 9
1. 3 answers
2. asked by Seastone
3. 751 views
Laird Company sells coffee makers used in business offices. Its beginning inventory of coffee makers was 200 units at $41 per
1. 0 answers
2. asked by Meg
3. 738 views
An electric kettle operates at 110V. What is the resistance of the kettle if the power is 1.5kW?8.1 Ω 1.4 Ω 81 Ω 14 Ω Both A
1. 1 answer
2. asked by Herp
3. 733 views
A spiiner was spun 16 times. The results are shown in the table below.yellow = 5 white = 4 red = 0 blue = 2 green = 2 orange = 3
1. 2 answers
2. asked by kyle
3. 732 views
4.Point E is located at (–2, 2) and point F is located at (4, –6). What is the distance between points E and F? (1 point)
1. 2 answers
2. asked by Delilah
3. 722 views
joe weighs 650N. how much work does he do if he climbs 4m up a a rope?
1. 1 answer
2. asked by Brenna
3. 716 views
is the set of positive intgers the same as the set of nonegative integers? Explain?
1. 1 answer
2. asked by Taylor
3. 713 views

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