Questions Asked on
January 22, 2012

Chemistry
Predict whether the following reactions will be exothermic or endothermic A) N2(g)+ 3H2(g) > 2NH3(g) B) S(g) +O2(g) > SO2(g) C) 2H2O(g) >2H2(g) + O2(g) D) 2F(g) +F2(g) Bond HH 432 kj/mol NN(triple bond) 942 kj/mol O=O 494 KJ/Mol FF 155 KJ/mol
asked by Kristen 
chemistry
What is the pH of a 2.8 M solution of HClO4?
asked by katie 
physics
a ball of mass 8kg falls from rest from a height of 100m.neglecting air resistance,calculate its total energy after falling a distance of 40m
asked by valentino anthony 
chemistry
A solution of NaOH(aq) contains 6.2 g of NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C.
asked by katie 
chemistry
In a butane lighter, 9.5 of butane combines with 34.0 of oxygen to form 28.7 carbon dioxide and how many grams of water?
asked by peanut 
chemistry
Find the formula for the compound that contains 72.4% iron and 27.6% oxygen.
asked by student 
chemistry
calculate the energy, in joules and calories required to heat 25.0g of water form 12.5 deg. celcius to 25.7 deg. celcius i know the answer just need to see how to do it especially the calories
asked by shaun 
Chemisty
The compound potassium carbonate is a strong electrolyte. Write the reaction when potassium carbonate is put into water
asked by ben 
chemistry
What mass of water must be added to 0.5 mol of glucose to make a solution of 25 percent by mass?The molar mass of glucose is 180 g/mol.
asked by student 
calculus
Find the volume of the solid generated by revolving the region bounded by the graphs of the equations about the xaxis. (Round your answer to three decimal places.) y = e^−x y=0 x=0 x=7 I got the answer ~10.783 Idk why it's wrong
asked by NAN 
chemistry
Burning 32 g of CH4 in excess oxygen will produce how much CO2 according to the equation CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)
asked by heens 
science
The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the above equation if the object was 100,000 meters above the ground? (Note: this question refers to Newton’s equation for
asked by ThuyD 
geometry
Express the following as a function of a single angle sin 20 degree cos 30 degree + cos 20 degree sin 30 degree
asked by Melinda 
ChemB
measurements of carbon 14 taken from linen wrappings of the book of isaiah from the dead sea scrolls indicate that the scrolls contain 79.5% of the carbon 14 expected in living tissue. how old are these scrolls if the half life of carbon 14 is 5730 years?
asked by L.Bianchessi 
Statistics
Given that a sample is approximately bellshaped with a mean of 60 and a standard deviation of 3, the approximate percentage of data values that is expected to fall between 54 and 66 is
asked by Dawn 
physics
A boy throws the ball vertically upwards with an initial velocity of 15m\s,what is the magnitude and direction of the ball
asked by soul 
physics
Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are
asked by john 
physics
A stunt woman sitting on a tree limb wishes to drop vertically onto a horse galloping under the tree. The speed of the horse is 13.5 m/s, and the woman is initially 2.60 m above the level of the saddle. (a) What must be the horizontal distance between the
asked by john 
Social Studies 7R
What was the Declaration of Independence and why was it written?
asked by Laruen 
Chemistry
A chemical reaction is run in which 132 joules of work is done by the system amd the internal energy changes by 469 joules. Calculate the amount of heat transferred. u=q+w I was going to do 469 = q + 132 but I think this is wrong.
asked by Hannah 
physics
A 200.0 kg astronaut and equipment move with a velocity of 2.00 m/s toward an orbiting spacecraft. The astronaut will fire a 100.0 N rocket backpack to stop his motion relative to the spacecraft. (a) What acceleration is attained by the rocket backpack?
asked by sarah 
Chemistry
How many moles of atoms are in one mole of AlPO4?
asked by Diana 
Pre calc
Use the halfangle formulas to determine the exact values of the sine, cosine, and tangent of the angle. 67° 30' 7 sin(67° 30')= cos(67° 30')= 4 tan(67° 30')=
asked by kyle 
physics
A truck on a straight road starts from rest and accelerates at 2.0 m/s2 until it reaches a speed of 20 m/s. Then the truck travels for 20 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.0 s. (a)
asked by seanso 
Chemistry
Suppose you wanted to heat a mug of water (250 mL) from room temperature 25 C to 100 C to make a cup of tea. How much energy (in units of calories and joules) would you need from your microwave?
asked by David 
Chemistry
A sample of Manganese (II) Chloride has a mass of 19.8 grams before heating, and 12.6 grams after heating until all the water is driven out. Based on this information, how many water molecules were attached to each molecule of Manganese (II) Chloride?
asked by Diana 
science
why ice floats on water?
asked by akshat 
chemistry
when hydrogen is fitted into reactivity series of metals , it comes immediately after
asked by didi 
world history
To what did the U.S. Supreme Court case Brown v. Board of Education refer? A. women's rights in America B. racial segregation in American schools C. the 1960s counterculture in America D. American reaction to terrorist attacks I say B.
asked by tracy 
Physics
Find the current in the 10.0 resistor in the drawing (V1 = 20.0 V and R1 = 15.0 )..?
asked by Pete 
Chemistry
Xe(g) + F2(g) uv light> Xe F2(s) XeF2(g) + 2F2(g) catalyst> XeF6(s) XeF6(s) + H2O(l) > Xe O3(s) + 6HF(g) Looking at these three reactions respond the following: a) For each 0.0250 grams of xenon hexaflouride that reacts, what mass of
asked by Alexandra 
physics
A puck on a horizontal, frictionless surface is attached to a string that wraps around a pole of finite radius, as shown in the figure . As the puck moves along the spiral path, does its speed increase, decrease, or stay the same?
asked by Patrick 
Chemisty
The compound copper(II) nitrate is a strong electrolyte. Write the reaction when copper(II) nitrate is put into water
asked by love 
physics
A rocket moves straight upward, starting from rest with an acceleration of +25.5 m/s2. It runs out of fuel at the end of 4.26 s and continues to coast upward, reaching a maximum height before falling back to Earth. (a) Find the rocket's velocity and
asked by john 
physics
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast
asked by annonymous 
chemistry
The heat of vaporization of bromine at its boiling point (59.6 °C) at 1.00 atm is 29.54 kJ/mol. Calculate the vapor pressure of bromine at 37.8 °C.
asked by WLP 
world history
The Japanese living in America were seen as a threat to national security after the Japanese attack on Pearl Harbor, so they were sent to live in camps in the interior of the country. true or false
asked by Elizabeth 
French
What is French club and what do you do at French Club?
asked by Laruen 
Chemistry
Based on the balanced equation 2NBr3 + 3NaOH → N2 + 3NaBr + 3HOBr calculate the number of of excess reagent units remaining when 116 NBr3 molecules and 180 NaOH formula units react? I calculated the excess reagent to be NaOH. So is the units of remaining
asked by Kyle 
MathProbability
Data collected on volcanic eruptions give a mean time between eruptions of 29 months. Assume these eruptions occur as a Poisson process in time, find the: (a) Expected number of eruptions during the fiveyear period beginning from the time you have read
asked by sand 
History
How did the truman policy come about?
asked by leslie 
Chemistry
THE RATE LAW FOR THE REACTION 2NO + 02 = 2NO2 IS FIRST ORDER IN OXYGEN AND SECOND ORDER IN NO. PROPOSE A MECHANISM IN WHICH EACH STEP IS BIMOLECULAR. SPECIFY THE SLOW STEP. I HAVE NO IDEA WHAT TI DO. HELP PLEASE? THANKS.
asked by ALISON 
History
How had U.S. policy toward Europe changed by the end of 1947? Why did this change occur?
asked by kiana 
Physics
At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the
asked by mo 
Physics
At an air show, a jet plane has velocity components vx = 695 km/h and vy = 440 km/h at time 4.85s and vx= 933km/h and vy = 465 km/h at time 7.12 s. For this time interval, find (a) the x and y components of the plane’s average acceleration and (b) the
asked by mo 
Physics
You have 2 photos of a bicyclist. One shows the rider at the corner of Third and Main streets, the other shows the rider at Twentieth and Main. There are lampposts at every corner in this town, and the first picture shows it to be 10:32:00 exactly. The
asked by Hannah 
science
Why is a pizza cutter handle a lever?
asked by Annie 
Math
Please show me how to solve: Doctors can use radioactive iodine to treat some forms of cancer. The halflife of iodine  131 is 8 days. A patient receives a treatment of 12 millicuries of iodine  131. (A mullicurie is a unit of radioactivity.) How much
asked by Jane 
world history
Which of the following is NOT true about the arms race between the United States and the Soviet Union during the cold war? A. The Soviet Union created the first manmade satellite, prompting the United States to develop the National Aeronautics and Space
asked by tracy 
Chemistyr
Why must the limiting reactant be used to determine the theoretical yield?
asked by Ann 
math
An artifact was found and tested for its carbon14 content. If 76% of the original carbon14 was still present, what is its probable age (to the nearest 100 years)? Use that carbon14 has a halflife of 5,730 years.
asked by Anonymous 
math
every week Brady gets $2.50 more for his allowance than Max does. They spend $6 on snacks and save the rest. Brady saves $72, but Max saves only $52. How many weeks does it take Brady to save $72? !@#$%^& much money does Max get every week?
asked by t 
math
If Julie bought 8 Tshirts, she would be short $28. If she bought 4 Tshirts and 3 baseball hats, she would have $17 left. If each hat cost $5, how much money did she have in the beginning?
asked by t 
math
A flower bed is in the shape of a triangle with one side twice the length of the shortest side, and the third side is 19 feet more than the length of the shortest side. Find the dimensions if the perimeter is 143 feet.
asked by Tarisha 
physics
Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are
asked by john 
physics
Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are
asked by john 
physics
Two boats start together and race across a 42 km wide lake and back. Boat A goes across at 42 km/h and returns at 42 km/h. Boat B goes across at 21 km/h, and its crew, realizing how far behind it is getting, returns at 63 km/h. Turnaround times are
asked by john 
physics
A rocket moves straight upward, starting from rest with an acceleration of +25.5 m/s2. It runs out of fuel at the end of 4.26 s and continues to coast upward, reaching a maximum height before falling back to Earth. (a) Find the rocket's velocity and
asked by john 
Chemistry
For the reaction Al(s) + 3 HCl(aq)>AlCl3(s) +3/2 H2(g) it was observed that when 4.00g of aluminum reacted with excess HCl, exactly 30,0 kJ of heat was released. What is the delta H for this reaction? I do not understand how to get the delta H value.
asked by Hannah 
physics
The lob in tennis is an effective tactic when your opponent is near the net. It consists of lofting the ball over his head, forcing him to move quickly away from the net (as shown in the figure below). Suppose that you loft the ball with an initial speed
asked by katie 
Physics
A speedboat starts from rest and accelerates at +1.98 m/s2 for 8.25 s. At the end of this time, the boat continues for an additional 5.58 s with an acceleration of +0.348 m/s2. Following this, the boat accelerates at 1.42 m/s2 for 7.22 s. (a) What is the
asked by Robert 
chemistry
calculate[OH],[H+] of a .20 M solution of triethylamine Kb=4.0*10^4
asked by chad 
alg2/trig
1)3x^212x21 solve by completing the square in simplest radical form 2) (1/x+3)(2/3x)=(4/x^29)find values of x 3)3/radical(3a^2b^4) is equivalent to 4) factor completely 27x^75x^4
asked by alice 
MathProbability
Consider a collection of n biased coins, each showing Heads with probability p and Tails with probability 1p , independently of the others. The coins are tossed and all coins showing Heads are collected together and tossed again. Write down an expression
asked by sand 
Thermodynamics Fluids Mechanics
The viscosity of a fluid is to be measured by a viscometer constructed of two 3ftlong concentric cylinders. The inner diameter of the outer cylinder is 6 in, and the gap between the two cylinders is 0.05 in. The outer cylinder is rotated at 250 rpm, and
asked by Angel 
Physics
A 1.46 × 10 4 kg railroad car moving at 7.05 m/s to the north collides with and sticks toanother railroad car of the same mass that is moving in the same direction at 1.76 m/s. What is the velocity of the joined cars after the collision? Answer in units
asked by Angel 
Math 543
The number 3136 is the sum of the first how many odd whole numbers?
asked by lily 
Math
Please explain how you got this answer as well! A shape has a perimeter of 3.00 M. Is it possible that one side's length is only 5 cm? Explain
asked by I need a answer to this ASAP please help 
Math 543
The number 3136 is the sum of the first how many odd whole numbers?
asked by lily 
math
In a group of 9 coins, one is fake and weighs slightly more. What is the fewest number of times you need to use a pan balance to find the counterfeit coins? (A pan balance is a scale used to measure weights, where weights are placed in two pans. The
asked by claudia 
Physics
A hockey player makes a slap shot on a 2.0 kg stationary puck, exerting a 30N force for .16 seconds. A What impulse is given to the puck? B. With what velocity does the puck leave the stick?
asked by Gaby 
Geometry
Explain why the the inverse of sine times 1.5 does not make sense.
asked by Anonymous 
world history
Which system of government rests furthest left on the political spectrum and, as a totalitarian regime, focuses on the government owning all aspects of the economy, including property and the means of production?
asked by tracy 
History
In 12 paragraphs answer the following: What was the Truman Doctrine and how did it come about?
asked by Diesel 
Chem
how can the concept of specific heat capacity of water be used to explain the heating and cooling patterns of oceans and climate on the plane?
asked by Skye 
world history
Hitler�s �Final Solution� referred to the extermination of the Jewish population living in and around Germany during the time of World War II. This resulted in the execution of over 6 million Jews. true or false I say its true
asked by tracy 
math
how do you solve this.prove: cos2A plus cosA divided by sin2A minus sinA equal to cos2A plus 1 divided by sinA
asked by lungisile ntobela 
Physics
A hockey player makes a slap shot on a 2.0 kg stationary puck, exerting a 30N force for .16 seconds. A What impulse is given to the puck? B. With what velocity does the puck leave the stick?
asked by Gaby 
physics
An object of mass 1,5 kg,is pulled along a rough horizontal surface by a horizontal force F.calculate the value of F if the force of friction is 1,3 N and the object accelerates at 2m.s2
asked by Mluleki 
World history
How did king leopold develop his image as a great humanitarian leader?
asked by Carlos 
Calculus
Suppose you have a rational function that its denominator is (Xc) and numerator can be any function. Suppose you need to find the limit of this rational function given as x goes to value c. Can you always say that for this problem the limit does not
asked by Cody 
Statistics
Shown below are the data giving the length of life of lights in an underground tunnel. 9.0 months 7.0 months 8.2 months 8.3 months 7.8 months 8.1 months 7.5 months 7.6 months 9.1 months 7.4 months I calculated the standard deviation to be about 0.679.
asked by Joy 
math02 / trigonometric
solve the following oblique triangles using sine law. Given: Y=55 degree 10 minute, b=125cm, beta=9 degree?
asked by wenz 
physics
The classify the as synthesis, decomposition, Single replacement. Double replacement. 2 Al +3NiBr2. 2AlBr3+3Ni
asked by keria 
Social Studies
Have to write a 1 to 2 paragraph report on Crispus Attucks.
asked by Qua 
math problem
I have no clue about this problem please solve 8[73(6128)]
asked by Clenisford J 
MathProbability
Consider a collection of biased coins, each showing Heads with probability and Tails with probability , independently of the others. The coins are tossed and all coins showing Heads are collected together and tossed again. Write down an expression for the
asked by sand 
world history
which country was invaded by German forces, in spite of having signed a nonaggression pact with Germany in 1939?
asked by tracy 
physics
Jana investigates the movement of a lift by placing an apple with a mass of 100 g on a Newton scale. During the first 3 seconds of movenent the scale registers a reading of 1,2 N. Over the next 5 seconds it registers 0,98 N and for the last 2 seconds the
asked by Nyakallo 
society, please help
I have to write an essay over society's biggest problem. It says: " In our society we face a number of problems, such as crime, poverty, and pollution. What do you think is the biggest problem we face in our society today, and why is it a serious
asked by 12yearoldpoet 
Calculus
What is total volume for 36" X 2" X 2"
asked by Sheri 
physics
During a Science day learners use a plastic cold drink bottle as a rocket.They use a bicycle pump to increas the presure inside the bottle.When the presure becomes high enough,the bottle is launched vertically upwards into the air.The bottle returns to its
asked by Thabang 
english
unscramle this wordcrimeamsg
asked by julie 
English
Can you give me a 1 paragraph example of casual analysis? Its for my report in English. Thank you so much! :)
asked by Irish 
Chem
explain why the boiling point of temperature of water in a pressure cooker can be greater than 100C
asked by Skye 
math116
solve using the multiplication principle, 4x>1/11
asked by Alice 
Social Studies 7R (Q2)
Why did Britian pass the Intolerable Acts? What did it state? PLEASE HELP!!!! I DON'T GET THIS!!!! THANK YOU!!!
asked by Laruen 
Public Health / Science
Where can I find the top five health problems in Florida? I have checked the Florida Department of Health site but I am not having luck. Any help would be appreciated. Thanks.
asked by Johanna 
6th grade math
how to solve w/3=17
asked by Isaiah 
chemistry
Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
asked by student 
Writeacher
Thank you soooo much. you have helped me so much since yesterday, i really appreciate it especially since you helped me removew my doubtings. Again thank you.
asked by sandy 
psych
what are Similarities and Differences of Gangs and Organized Crime Groups
asked by Stella 
Social Studies
What Is The New Jersey Plan
asked by Tina 
physics
what is reaction product when ethene is treated with steam using phosphoric acid as catalyst at 300 degrees celcious
asked by didi 
world history
The Marshall Plan was enacted to support a U.S. foreign policy to keep communism from spreading, also known as. A. containment. B. deterrence. C. the Nuremberg Trials. D. NATO. I say A. CONTAINMENT
asked by tracy 
physics
When Maggie applies the brakes of her car, the car slows uniformly from 15.8 m/s to 0 m/s in 2.25 s. How far ahead of a stop sign must she apply her brakes in order to stop at the sign? Answer in units of m
asked by fghsgsdf 
Social Studies 7R
What was the purpose of the First Continental Congress????? Please Help! PS: This is also a curious question.
asked by Laruen 
Math
f (x)= {$50 if 0< x 60} What is the cost if the repair man works for 45 minutes? What is the cost if the repair man works for 105 minutes? What is the computer repair man’s rate policy? Explain in real terms
asked by Tracy S 
physics Help
I don't how to do this please help the the classify the reaction as. Synthesis decomposition single replacement double replacement. 4Al+3O2. 2Al2O3. 2NaCl. 2Na+ Cl2. Cacl2+F2. CaF2+ Cl2
asked by keria 
world history
Which two superpowers engaged in an arms race during the cold war as they competed with each other to acquire advanced weaponry and build up their militaries? I say United States and the Soviet Union
asked by tracy 
world history
What is true about the key German leaders who were responsible for the Holocaust? A. The Marshall Plan provided them with the opportunity to emigrate to the United States and avoid trial. B. The Potsdam Conference, held in Potsdam, Germany, revealed that
asked by tracy 
effective listening
Your friend and you are discussing what you’re learning and one of them says the following: “Effective listening? There’s nothing to it! You just sit there and listen. And anyway, it’s passive – it doesn’t take any energy or concentration."
asked by 12yearoldpoet 
english
I have to write a compare contrast essay does this sound ok? One of the toughest decisions that you are going to face as a parent is to decide where to send your children to get their education. There are many reasons why public schools are academically
asked by westwood 
physics
HELP HELP HELP Two tiny objects with equal charges of 83.0 µC are placed at two corners of a square with sides of 0.320 m, as shown. How far above and to the left of the corner of the square labeled A would you place a third small object with the same
asked by HELP HELP HELP 
physics Help
Then classify the reactions as synthesis decomposition single replacement double replacement (NH4)2SO4+BA(NO3)2. BaSO4+ 2NH4NO3.
asked by keria 
math
I need to find out the type of triangle (by the type of angles). Is triangle acute, right or obtuse, when the lenghts of triangle sides are: a) 7, 8, 12 b) 20, 15, 40 c) 2/3, 8/9, 10/9
asked by eve 
science fair
how do you make the following sentence in a if...ans then statement? if you multitask the result won't be as good as you not multitasking depending on what you multitask. thank you
asked by sandy 
world history
In what nation did the Soviet Union place missiles, which was viewed as a threat to the United States and prompted action by President John F. Kennedy I say Cuba
asked by tracy 
chemistry
An insulated beaker contains 250.0 grams of water at 25oC. Exactly 41.6 g of a metal at 100.0oC was dropped in the beaker. The final temperature of the water was 26.4oC. Assuming that no heat is lost in any other way, calculate the specific heat of the
asked by utna 
world history
Mikhail Gorbachev's concept of glasnost referred to an openness to communicate to the West in an attempt to pull the Soviet Union out of a poor economy. I say false
asked by tracy 
physics
You are at a baseball game and the pticher throws a fast ball that accelerates to the batter at 50 m/s^2. Assume that the baseball has a mass of 0.15 kg. How much force (in Newtons) must the batter apply to the ball to lay down a perfect bunt that stops
asked by Abby 
Science
If a car is going 65mph makes a 90 degree, what changes?
asked by Ian 
Business Finance
Thank you!!!!!!!!!!!!!!
asked by Terry 
Science
What is a reference point in determining force, velocity,speed?
asked by Ian 
History
How long has the gun control law been going on in the USA??
asked by Anonymous 
physics
An object is dropped from rest. What is its instantaneous speed when it has been in motion for 8 s? The acceleration of gravity is 9.8 m/s2 . Answer in units of m/s
asked by fghsgsdf 
English
What does the things you carry say about you? The things we carry is largely determined by ________.
asked by Maya 
World history
How did the cold war end?
asked by Anonymous 
Math
a farmer wants to put a fence around a rectangular field and then divide the field into three rectangular plots by placing two fences parallel to one of the sides. if the farmer can only afford 1000 yards of fencing, what dimensions will give the maximum
asked by Mary 
English102
Could someone take a look at my sentence outline for my english class, I have been working on this for awhile and I do not know why this is so hard for me to get. Hopefully I am getting it a little betternow, thanks for all the help. Thesis Statement:
asked by Jazmyne 
world history
What nation experienced the Velvet Revolution, a peaceful and nonviolent movement that removed communists from power? I say Czechoslovakia
asked by tracy 
algebra
D is the set of whole numbers less than 3. (1 point) D = {0,1,2,3,4,5}; D = {x is a whole number, x < 3} D = {0,1}; D = {x  x < 3} D = {0,1,2}; D = {x  x is a whole number, x < 3} D = {0,1,2,3,4,5,6,7}; D = {x < 3}
asked by amber 
chemistry
Calculate the number of moles of each ion in 10.5 mL of 0.205 M cadmium phosphate solution.
asked by diana 
trig
4cos^2 theta = 3 where 0 degrees < theta< 360
asked by valeria hersh 
chemistry
Week 5, Day 4, respond to the problem statement assigned to you for this week. At a prominent state hospital, a 45yearold woman is receiving a ‘combined modality' treatment for the initial stage of breast cancer. State the two aspects included in this
asked by Katrina 
Physics
A 1500 kg car traveling at 17.6 m/s to the south collides with a 5000 kg truck that is initially at rest at a stoplight. The car and truck stick together and move together after the collision. What is the ﬁnal velocity of the twovehicle mass? Answer in
asked by Angel 
chemistry
7.How might this method of finding thickness of the aluminum be used in finding the size of the molecule?
asked by kylie 
world history
Why is war against terrorists difficult to fight? C. Members of terrorist groups are scattered throughout the world, so there is no one clear target. D. Terrorists leave no trace of their plans. I say C.
asked by tracy 
English
Thank you very, very much. Here are some more sentences on the summary of Orwell's 1984. I referred to the websites you suggested to me. 1)The novel describes a future England, Airstrip One, no longer the head of an Empire, but an outpost of Oceania, a
asked by Henry2 
world history
Which two nations rose as the world's superpowers after World War II? I say United States and the Soviet Union
asked by tracy 
English
Here is the second part. Thank you very much. Hopefully you can have a look at it, too. 1) The Ministry of Truth, which exercises complete control over all media in Oceania, employs Winston at the Ministry's Records Department, where he doctors/alters
asked by Henry2 
essay: inventions
I have to write an essay for my english class. The "subject" is inventions. I came up with the phone, the car, electricity, and peanut butter. Peanut butter was more of a joke. I think that I should do electricity. If I did electricity, I could put
asked by 12yearoldpoet 
math
The halflife of 234U, uranium234, is 2.52 105 yr. If 98.3% of the uranium in the original sample is present, what length of time (to the nearest thousand years) has elapsed?
asked by Anonymous 
math problem
help me solve system of equation x+7y=9 (1) x=47y (2)
asked by Clenisford J 
Math
Find the coordinates of the yintercept for the given equation x+y=2
asked by Lamar 
Anthropology
Are we affected more by nature or nurture growing up? Nature being a person’s genes determining their physical and behavioral traits and nurture being influenced by their environment (parenting style, education, socialization).
asked by Rebecca 
math
The height of a ball that was batted into the air at 150 feet per second is a function of t, the time in seconds after the ball was hit. The height is determined by subtracting 15 times the square of t from 150 times t. Which equation can be used to find t
asked by Anonymous 
Physics
A meteor streaking through the night sky is located with radar. At point A its coordinates are (5.20km,1.20km), and 1.16s later its has moved to point B with coordinates (6.08km, 0.900km ). a) find the x comonent of it average velocity between A and B.
asked by Amy 
Physics
(a) What is the acceleration of an automobile that goes from a dead stop to a speed of 50 m/s in 5 s? (b) Assume that you are driving an automobile that has a mass of 800 kg. If this acceleration is applied, how much force (in Newtons) is applied?
asked by Addie 
physics
(a) What is the acceleration of a car in m/s² that doubles its speed from 36.0 km/h in 5.00 s? (b) What net force acted on this car if its mass was 1,000.0 kg?
asked by sarah 
math
The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your
asked by Anonymous 
Chemistry
A lightyear is a unit of length equal to the distance that light travels in 1 year. What is 1 lightyear expressed in units of meters? The speed of light is 3.00 × 100^8 m/s.
asked by Cynthia 
science
The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the above equation if the object was 100,000 meters above the ground?
asked by Thuy Nguyen 
chemistry
looking at all the averages on the front board, give at least three possible reasons for the values being different. classroom values from board: 10, 15, 25, 18, 39, 45
asked by xavier 
world history
Who came to power in China, instituting a Communist regime that would bring great suffering to the nation's people? I say Mao Zedong
asked by tracy 
physics
A 95 g tennis ball is traveling at 106 km/h when it bounces of a wall and travels in the opposite direction it came from at a speed of 88 km/h. a. Determine the impulse on the ball if the. (don’t forget that it is a vector) b. If the average force
asked by Fatima 
physics
A 95 g tennis ball is traveling at 106 km/h when it bounces of a wall and travels in the opposite direction it came from at a speed of 88 km/h. a. Determine the impulse on the ball if the. (don’t forget that it is a vector) b. If the average force
asked by Fatima 
physics
a .300 kg baseball is thrown at a speed of 6.5m/s. the batter hits the ball and it flies into the outfield at a speed of 19.2 m/s. How much work is done into hitting the baseball
asked by jay 
chemistry
A solution of NaOH(aq) contains 6.2 g of NaOH(s) per 100.0 mL of solution. Calculate the pH and the pOH of the solution at 25 °C.
asked by katie 
science
how wind influence tides
asked by arvindra 
physics
A meteor streaking through the night sky is located with radar. At point A its coordinates are (5.20km,1.20km), and 1.16s later its has moved to point B with coordinates (6.08km, 0.900km ). a) find the x comonent of it average velocity between A and B.
asked by AaA 
math
Instead of laying off workers, a company cut all employees hours from 40 hours to 3 hours a week. By what percent were employee hours cut?
asked by Anonymous 
Chemistry
What is the concentration of SO3^2 in a 0.043 M solution of Sulfurous acid (H2SO3) in water? The value of Ka1 for H2SO3 is 1.300 x 102 and the value of Ka2 is 6.300 x 108.
asked by Summer 
physics
6) A sub has a volume of 20 m3 and a density of 1500 kg/m3. It sinks to a depth of 40 meters. The density of sea water is 1025 kg/m3. a. What is the pressure on the sub at this depth? b. The sub has a window with a diameter of 30 cm. What is the net force
asked by Kat 
History
What are some issues today about gun control? I know that there are a lot of crimes that occur due to illegal gun users. Anything else??
asked by Anonymous 
world history
What agreement was signed in 1992 between the United States, Mexico, and Canada? I say North American Free Trade Agreement
asked by tracy 
physics
A car stops for a red ligth. The light turns green and the car moves for 3 seconds at a steadily increasing speed. During this time, it travels 20 meters. The car then travels at a constant speed for another 3 seconds for a distance of 30 meters. Finally,
asked by Anna 
Physics
In 35s, Samsonite lifts his 8kg case from the floor to .8m above the ground (in his arms), carries it 24m across the room ( at the same height), and puts it on a conveyor belt 1.8m above the floor. At this point, the machine raises the bag 13 more meters
asked by Tiana 
Physics
President Obama has set up a slide for his young children so they( and he) can slide into the pool behind the White House. The White House staff puts the bottom of the slide ( Which is flat for 2m) at the rim of the window sill which is 10m above the
asked by Tiana 
world history
North Korea's capitalist economy has surged over the last decade due to increasing exports. I say false
asked by tracy 
math
If possible, completely factor the expression. (If the polynomial is not factorable using integers, enter PRIME.) x^2x20
asked by Anonymous 
chemistry
how much ice would i have to eat to l lose 10% of my body weight?
asked by matt 
math
what is the range for the data 13,20,31,46,59,68
asked by llil 
math
Simplify the expressiom (x3)(2x5)(x+1)(x6)
asked by Anonymous 
math
The product of two consecutive positive even numbers is 1368. What are the numbers? (Enter solutions from smallest to largest.)
asked by Anonymous 
Algebra
If a nuclear power plant can buy 86% enriched fuel for $21000/lb and can buy cheaper less enriched uranium that is 80% pure and for $14000/lb still using as a mixer the 57% pure uranium at $5000/lb which fuel is going to be more cost effective for the
asked by Mika 
physics
Investigate the effect of the mass of an object on its motion and the relationship between an object’s mass and weight
asked by cassand 
math problem
A and B are travbeling in the same direction A is 40 miles B is 60 miles if a passes @ 12:20am and B passes @ 12:35am what time will B catch up to A?
asked by Clenisford J 
physics
In reaching her destination, a backpacker walks with an average velocity of 1.20 m/s, due west. This average velocity results, because she hikes for 5.94 km with an average velocity of 3.28 m/s due west, turns around, and hikes with an average velocity of
asked by Alex 
math
Suppose you have a rational function that its denominator is (Xc) and numerator can be any function. Suppose you need to find the limit of this rational function given as x goes to value c. Can you always say that for this problem the limit does not
asked by Codster 
history
What are three myths about the New World and the Indians (Virgin land, inferior, Noble savage)
asked by lou 
world history
What has happened to the leadership of Cuba since Fidel Castro stepped down due to illness? I say his brother, Raul, has taken Fidel's place.
asked by tracy 
Physics
Two flat metal plates of area 2.8 m2 are placed parallel to each other and both are then charged, one with +10 µC and the other with 10 µC. Determine the electric field in the air gap anywhere far from the edges.
asked by Johnny 
Chemistry
An insulated beaker contains 250g of water at 25 degrees celsius. Exactly 41.6g of a metal at 100 degrees celsius was dropped in the beaker. The final temperature of the water was 26.4 degrees celsius. Assuming that no heat is lost in any other way,
asked by Hannah 
world history
Vietnam had been a colony controlled by what nation prior to World War II? I say France
asked by tracy 
English
Thank you writeacher. I hope that one of your science experts on Jiskha can help me with finding the vocabulary. Here are some sentences on Chapter I of Orwell's 1984 I need you to check. 1 )The telescreen is described as an oval metal object fully
asked by Henry2 
geography penn foster 007689RR
The steppes of southern Russia, the African veldt, and the pampas of Argentina are good examples of _______ biomes?
asked by Anonymous 
world history
In which country did Eva Perón work with her husband, President Juan Perón, to improve the lives of the poor and working class? I say Argentina
asked by tracy 
Physics
A runner runs and jumps off a cliff into the water below. If the runner takes up running a 9.37 m/s and lands in the water 2.0 m away from the cliff's edge: How tall is the cliff?
asked by Lakisha 
language arts
what does refrain mean when dealing with language arts/speeches?
asked by Brianna 
MATH
The regular price is $20. The sale price is $20. What is the discount rate?
asked by Kevin 
chemistry
What is the pH of a 2.8 M solution of HClO4?
asked by katie 
Chemistry
How would you make 100mL of tartrate buffer, pH 3.5, from 0.100 M tartaric acid, 1M NaOH and deionized and distilled H2O? You need to consider the ionization of two the two acidic groups separately.
asked by Elle 
world history
Which of the following nations possess nuclear weapons? I say North Korea
asked by tracy 
visual literacy in business
in all but what way does lightning shape our perspective
asked by vanessa 
math
Determine whether the point (1, 4) is a solution of the system 6x + 9y = 42 5x + 0y = 5 by substituting the point into each equation
asked by Nesha 
Chemistry
1)Which thermochemical equation and data does not agree with the other two written? a) 2NO (g)+ O2 (g) >2 NO2 (g) deltaH=169.8 b) NO (g) + 1/2 O2 (g) > NO2 (g) delta H = 56.6 c) 4 NO2 (g) > 4 NO (g) + 2 O2 (g) delta H = +226.4 d)all three equations
asked by Rick 
science fair
Writeacher, its me again i just wanted to know if the experiment of the math test and music is enough for the multitasking project or should i include another experiment to prove the hypothesis. thank you soo much.
asked by sandy 
7th grade science ~ FOR MS. SUE
Are plants organism? Please help!! Thank you!!
asked by saranghae12 
Physics
Over a time interval of 2.15 years, the velocity of a planet orbiting a distant star reverses direction, changing from +18.9 km/s to 17.3 km/s. Find (a) the total change in the planet's velocity (in m/s) and (b) its average acceleration (in m/s2) during
asked by Isaac 
winter springs high
how do i solve 2x+7y=20 and y=3x+7
asked by paul 
Physics
Under the spreading chestnut tree the village blacksmith dunks a redhot horseshoe into a large bucket of 22*C water. How much heat was lost by the horseshoe in vaporizing .00100 kg. of water?
asked by Ben 
Chemistry
So I do know how to work out letter a) but I'm still very confused with parts b and c. Appreciate the help! 2FeN(s) + 3H2(g) > 2Fe(s) + 2NH3(g) Suppose that the reaction is carried out at 300C and 3.00 atm. 1.00 grams of iron (III) nitride reacts. a)What
asked by Alexandra 
History
What is gun control exactly?
asked by Anonymous 
speech
what does hook mean in a speech? what is used to grab the audiences attention? persuasion or hook?
asked by 12yearoldpoet 
Physics
A 57kg lead ball is dropped from the leaning tower of Pisa. The tower is 56 m high. (b) What is the speed of the ball after it has traveled 2.5 m downward?
asked by Anonymous 
physics
HELP HELP HELP Two tiny objects with equal charges of 83.0 µC are placed at two corners of a square with sides of 0.320 m, as shown. How far above and to the left of the corner of the square labeled A would you place a third small object with the same
asked by HELP HELP HELP 
womens voting rights
when did the republican party endorse women's right to vote
asked by 12yearoldpoet 
world history
In which country were apartheid laws created that prohibited interracial marriage and otherwise segregated the races? I say South Africa
asked by tracy 
world history
During the 1990s, the United States became involved in a military dispute involving which nations? I say Iraq and Kuwait
asked by tracy 
geometry
Given the hypotenuse of a right triangle is 600, and the length of all three sides is 1400, what are the lengths of the legs?
asked by Cori 
7th grade science ~ FOR MS. SUE
What would life be without organisms?
asked by saranghae12 
world history
Which of the following is NOT true about Nelson Mandela? I say B. He led massive peaceful protests against apartheid.
asked by tracy 
myths
what are some modern day myths?
asked by kelly 
world history
Select the nation that was created in 1947 in the Middle East to provide a homeland for Jewish people. I say Israel
asked by tracy 
Algebra
You are making a scale drawing of a sailboat using the scale 1 inch: 3 feet. The length of nthe sailboat at its longest point is 36 feet and the height is 54 feet.What should the lenght and height of the sailboat be in your drawing?
asked by Sarah 
math
the cost of building lawn xmetre long varies partly as x and partly as xsquare.The lawn cost #180 if it 30metre long and #280 if it 40metre.How long is a lawn if it cost #4000 to build.
asked by adeyeni 
world history
After World War II, Africa's economy was based on agriculture. I say false
asked by tracy 
social studies
What did the king of England do that made the colonist upset?
asked by ffgtf 
eco/372
is the effect of trade on the economic growth is it an example of macroeconomic
asked by at 
economics
label a point f inside the curve. why is this an inefficient point? label a point g outside the curve. why is this point unattainable? why are pointS A THROUGH E ALL EDDICIENT POINTS?
asked by patricia 
chemistry
i have 2 questions stoichiometry loss of CO2 1. record the amount of CO2 produced vs the amount of Na2CO3. I did 7 beakers with 20ml of 3M H2SO4 and add varying amounts of Na2CO3 to each. 2. discuss your results in terms of moles. is there a linear
asked by janey 
physics
A person takes a trip, driving with a constant speed of 93.5 km/h except for a 22.0 min rest stop. If the person's average speed is 68.0 km/h, how much time is spent on the trip and how far does the person travel? h km
asked by marybeth 
economics
label a point f inside the curve. why is this an inefficient point? label a point g outside the curve. why is this point unattainable? why are pointS A THROUGH E ALL EFFICIENT POINTS?
asked by patricia 
world history
What event occurred in Tiananmen Square in 1989? I say Prodemocracy protesters were killed by government troops.
asked by tracy 
Math, Please Help!!!
find the limit: lim of f(x) as x approaches 1 if f(x) = x^2 + 4, x is not equal to one and 2, x = 1. What is the answer and why?
asked by Anonymous 
physics
Assume a canister in a straight tube moves with a constant acceleration of 3 m/s2 and has a velocity of 13.5 m/s at t = 0.00 s. (a) What is its velocity at t = 1.00 s? v = m/s (b) What is its velocity at t = 2.00 s? v = m/s (c) What is its velocity at t =
asked by marybeth 
physics
A mass of 3.4kg sliding along a frictionless floor at 1.5 m/s strikes and compresses a spring of constant k=295 N/m. The spring stops the mass. How far does the mass travel while being slowed by the spring? How long does the mass take to stop?
asked by Sasha 
world history
What Muslim country was created when India was separated due to religious conflicts? I say Pakistan
asked by tracy 
Chemistry
A cup of teat containing 400g of liquid at 20 degrees celsius was heated. If 58.5 kj of heat was absorbed by the tea, what would the final temperature be? Assume that the specific heat of the tea is the same as that of water (4.18). I am not sure how to
asked by Hannah 
physics
A ball is thrown vertically upward with a speed of +10.0 m/s. (a) How high does it rise? m (b) How long does it take to reach its highest point? s (c) How long does the ball take to hit the ground after it reaches its highest point? s (d) What is its
asked by seanso 
physics
It is desired to move a small, 50 kg cat in outer space by strapping a lamp, which emits 100 W of blue light to it. If the cat is free in space, and the wavelength of blue light is 470 nm, what would be the acceleration of the cat? (HINT: Consider how many
asked by Anonymous 
writing
explain the purpose audience tune and content impact academic writing
asked by cs 
world history
In 1962, President John F. Kennedy was faced with a decision to avoid nuclear war. What occurred to place the United States in that position? I say The Soviets placed missiles in Cuba.
asked by tracy 
Business Finance
Using the FIFO method of inventory pricing, what is the dollar value ending inventory if there were 300 units on hand December 31? Auto Parts annual inventory of Windshield Wipers: January 1, Beginning inventory 300 units@11.00 March 15 Purchase 15o units
asked by Terry 
Trigonometry
What are these things called: cos x = cos x What are the rules to these trig rules? Thanks
asked by Trigonometry 
Chemistry
Name two organic compounds that cannot be extracted effectively from an aqueous solution by means of an immiscible organic solvent such as diethyl ether or cyclohexane
asked by Leesa 
physics
A small mailbag is released from a helicopter that is descending steadily at 3.00 m/s. (a) After 2.00 s, what is the speed of the mailbag? v = m/s (b) How far is it below the helicopter? d = m (c) What are your answers to parts (a) and (b) if the
asked by seanso 
Math Problem
a rectangle fixed at 30 cm what will make the permiter greater than 78cm
asked by Clenisford J 
MATH
Jada is trying to determine the number of tshirts that were in inventory before she started her shift. During her shift, she sold thirteen tshirts, which left twentytwo tshirts in inventory. Define a variable. Write an equation Jada can use to
asked by cha 
math
perimeter of basketball court is 108 meters and the length is 6 meters longer than twice the width. what are the lenght and widht
asked by Pauly 
language arts/ social studies
my friend and i have been trying to figure out this question but we cant come to an agreement. i think its "a" and she thinks it's "b." The question has to deal with the Gettysburg Address. Lincoln's speech is noted because of its a. poetic qualities b.
asked by Brianna 
chemistry
How much aluminum nitrate can be found when 12 g of aluminum react with lead(II) nitrate? Answer in units of mol
asked by lynn 
com172
Review the following passage and paraphrase it in the following box. Use the reference to create an appropriate APAformatted intext citation. Additionally, include one direct quotation. One of the most valuable skills a student can develop is focus.
asked by sabrina 
biology
What effects does an increase or decrease in the pH of the cell cytoplasm have on proteins and their ability to function?
asked by clark 
HISTORY
What did George Kennan mean by “containment”? Why did he think it would be a successful strategy?
asked by Kiana 
math
a photograph is 5.5 in. long and 3.2 in. wide. it must be enlarged so that both dimensions are 1.8 times greater. how long will the photograph be then?
asked by andreya 
physics
Three point charges are fixed in place in a right triangle. What is the electric force on the q = 0.63 µC charge due to the other two charges? (Let Q1 = +0.83 µC and Q2 = +0.9 µC.) what is the magnitude N, and direction in degrees ° above the positive
asked by john 
Social studies
To write a paragraph explaining Lincoln's vision of the united states. Make at least 2 references to specific details of the Gettysburg address.
asked by Mike 
calculus
how to find the continuity of this function? f(x)=13x^2
asked by mathx 
English
Thank you very much. Here is the second part I'd like you to check. 1) From his place Winston can read the three slogans of the Party: War is peace, freedom is slavery, ignorance is strength. 2) Each of these is of course either contradictory or the
asked by Henry2 
science
Can someone please help me to understand the steps in the process of scientific inquiry?
asked by Patiance 
social studies
Name some of the people who helped win the Revolution and list their contributions.
asked by stephanie 
chemistry
Mass of an unknown gas of 50 mL volume at 25 degrees C. and 740 mm of Hg pressure was 0.056 g. The molecular mass of this gas is...
asked by Shellie 
English
I am doing my application form for a university, it asks for my job information Job Title: I work at Mcdonalds parttime and work in the kitchen, what will my job title be? Kitchen staff? :S
asked by Matthew 
math
Solve the equation. (Enter solutions from smallest to largest. If there is no solution, enter NONE in the answer boxes.) 5x2 = 9x + 2
asked by Anonymous 
StatisticsProbability
Data collected on volcanic eruptions give a mean time between eruptions of 29 months. Assume these eruptions occur as a Poisson process in time, find the: (a) Expected number of eruptions during the fiveyear period beginning from the time you have read
asked by sand 
physics
Two particles each with charge +2.68 µC are located on the x axis. One is at x = 1.00 m, and the other is at x = −1.00 m. (a) Determine the electric potential on the y axis at y = 0.660 m. (b) Calculate the change in electric potential energy of the
asked by sarah 
Physics
If the block slides down the incline at a constant speed, what is the force of friction between the block and the plane?
asked by Katherinee 
Physics
is work directly related to power?
asked by rebekah 
English
I urgently need to write a short email to a scholar specialized in Comenius projects. After presenting myself and the school I'd like to include this: 1) As you are a scholar with an indepth knowledge of Clil within a Comenius project, I would like to
asked by Henry2 
math
f(x)=x^3+6x^2+9x find: x intercepts vertical asymptotes horizontal/slant asymptotes derivative second derivative increasing interval decreasing interval concave up interval concave down interval
asked by Melanie 
math
f(x)=x/(x^2+x2) find: x intercepts vertical asymptotes horizontal/slant asymptotes derivative second derivative increasing interval decreasing interval concave up interval concave down interval
asked by Melanie 
math
(x^3+7x+12)/(x4) find: x intercepts vertical asymptotes horizontal/slant asymptotes derivative second derivative increasing interval decreasing interval concave up interval concave down interval
asked by Melanie 
Literacy
6.The idea that countries should produce and sell goods that they produce most effectively and efficiently, and buy goods that other countries produce most effectively and efficiently, is known as A. absolute advantage theory. C. efficiency balanced trade.
asked by Heather 
physical science
a tennis player hits a ball of mass 200 g,which is moving towards him with a velocity of 30m/s west. calculate the impulse of the ball. b.the force the racket will exact on the ball if the time of contact is 0.2 seconds
asked by dansile 
Chemistry
I'm doing online chemistry homework, and the site keeps telling me I have the wrong answer, but I'm not sure what I'm doing wrong. please help? What is the pH of a 0.089M solution of phosphorous acid (H2PHO3) in water? The value of Ka1 for H2PHO3 is 1.600
asked by Summer 
physics
a mass being held by a string moves with speed v on a circular path of radius r, and has a period of revolution T. if it was desired to travel one revolution in twice as much time as before, what would be the radius of the path? what if the time was
asked by Becky 
Literacy
. Which statement best characterizes Adam Smith’s concept of the “invisible hand”? A. Those who don’t work shouldn’t eat. B. The quest for personal gain works for the common good. C. When governments fail to regulate, greed conquers all. D.
asked by Heather 
math problem
collect like term 10p+6q5p8q =
asked by Clenisford J 
Math
Ella reports that the height of a tree in her school yard is 3.8m. If ella measured the tree to the nearest hundredth of a metre, what is the least height she might report?
asked by Anonymous 
math
let fbe a function that is even and continuous on the closed interval [0,3]. the function f and itsderivatives have the properties indicated in the table below. sketch the graph. x 0 0
asked by Melanie 
Literacy
Calendula, Inc. sells its herbal teas at a lower price in foreign countries than those charged to consumers in Calendula’s home nation. In global trade, this is known as A. freeloading. C. brand infringement. B. depreciation. D. dumping my answer is A
asked by Heather 
psychology
View the results for a hypothetical psychology test psychology test. Then, create a report with the following: The mean score for each question. The mean score for the entire test. A graph that represents the scores for each question.
asked by p 
science fair
maybe making them pat thier head and rub their stomach or hear a lecture and draw while youre hearing it and then answer questions on it
asked by sandy 
english
paraphrase the following lines from dickinson i found the phrase to every thought i ever had, but one; and that defies me,...
asked by rand 
geometry
Find the area of a circle circumscribed about an equilateral triangle whose side is 18 inches long.
asked by cat 
math
a jar of jelly beans contains 33 red, 52 white, 70 yellow ad 85 orange. To the nearest whole percent, what percent of the total jelly beans are orange?
asked by sally 
Physics
A 2.7 kg ball strikes a wall with a velocity of 7.6 m/s to the left. The ball bounces oﬀ with a velocity of 5.2 m/s to the right. If the ball is in contact with the wall for 0.23 s, what is the constant force exerted on the ball by the wall? Answer in
asked by Angel 
computer science
How can i create my computer science project which is to draw a game and make a file on your game which you can create?
asked by Jahnvi 
physics
A 16kg stone falls 40m. Find the stone's kinetic energy just before it strikes the ground.
asked by tiff 
biology
What effect does an increase or decrease in the pH of the cell cytoplasm have on proteins and their ability to function?
asked by clark 
physics
A 0.579 kg basketball is dropped out of a window that is 6.22 m above the ground. The ball is caught by a person whose hands are 1.31 m above the ground. How much work is done on the ball by its weight?
asked by Jen 
bio
I did a pig dissection , but i am not to sure about these questions, any help would be great ! 1. The lungs of a fetal pig serve as a protection for what important body organ 2. The respiratory system is located on the ventral side of the pigs body, what 3
asked by Annie 
12th Grade Calculus
how will you multiply y = ae^3x + be^2x with dy/dx = 3ae^3x  2be^2x
asked by Akash 
US HItstory Since 1876
I am needing several opions on this subject. Your opinion would be great!! Do you think the reconstruction was a success or failure?
asked by Jaxon 
Physics
1. The problem statement, all variables and given/known data A point charge is placed at each corner of a square with side length a. The charges all have the same magnitude q. Two of the charges are positive and two are negative, as shown in the following
asked by Eddie 
physics
A model rocket is launched straight upward with an initial speed of 30.0 m/s. It accelerates with a constant upward acceleration of 2.50 m/s2 until its engines stop at an altitude of 170 m. (a) What is the maximum height reached by the rocket? m (b) How
asked by desperate help 
bio
The fetal pig does not have functional lungs, since the lungs are not being used is there any need to transport blood tot he lungs before the fetus is born
asked by Annie 
math
A circle with the equation (x + 4)2 + (y  3)2 = 9 is reflected over the line y = 1. What is the equation of the image?
asked by Callie 
Physics
A 42.5 kg student runs down the sidewalk and jumps with a horizontal speed of 4.16 m/s onto a stationary skateboard. The student and skateboard move down the sidewalk with a speed of 3.97 m/s. a) Find the mass of the skateboard.
asked by Angel 
science
Shown below are the data giving the length of life of lights in an underground tunnel. 9.0 months 7.0 months 8.2 months 8.3 months 7.8 months 8.1 months 7.5 months 7.6 months 9.1 months 7.4 months I calculated the standard deviation to be about 0.679.
asked by Joy 
bio
for a fetal pig why is it difficult to find the urinary bladder by describing the specific location ? what structures in the umbilical cord remove waste materials from a fetal mammal?
asked by Annie 
chemistry
What is the molarity of a solution that contains 31.0 HCl in 5.00kg water? (molar mass of HCl=36.46 g/mol)
asked by jim 
bio
name three major blood vessels that branch off the aortic arch and the body part the blood is carried to name two major artries that branch off the dorsal aorta and the organ they carry blood to
asked by Annie 
physics
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast
asked by annonymous 
accounting
Write a 34 page paper that summarizes your findings from the four (4) scenarios as well as how using Microsoft Excel helped you with this process, using the following outline: 2. Summarize the various accounting systems that each firm provides. Be sure to
asked by Bilo 
physics
a 43.7 kg student runs down the sidewalk and jumps with a horizontal speed of 4.48 m/s onto a stationary skateboard. the student and the skateboard move down the sidewalk with a speed of 4.25m/s. find the mass of the skateboard in units of kg. how fast
asked by annonymous 
physics
A 3.12 kg bowling ball traveling at 15.3 m/s to the right collides with a 2.15 kg bocce ball traveling at 7.52 m/s to the right. The final velocity of the bowling ball is 2.33 m/s to the left. Determine the final velocity of the bocce ball. What is the
asked by sand 
Finance
In November and December 2011, Gee Company, a newly organized magazine publisher, received $36,000 for 1,000 threeyear subscriptions as $12 per year, starting with the January 2012 issue of the magazine. How much should Gee report in its 2011 income
asked by shante 
Chemistry Lab
we reacted acetic acid with butanol and formed butyl acetate which is supposed to smell like banana but it smelled like sharpie/nail polish remover why might this be
asked by Bob 
problem solve in math
At a teacher’s conference on the first Saturday in November in Palm Springs, CA, 100 teachers meet in a large room. Each teacher shakes the hand of every teacher in the room, except for his or her own hand. How many total handshakes were made?
asked by lily 
physics
A ball of mass 0,2kg travels towards a hockey player at 10 m.s1.A force of 350N is exerted on the ball when she hits it so that it travels at 7,5 m.s1 in the opposite direction.Calculate the time that the ball was in contact with the hockey stick
asked by Mluleki