Isis
Newest questions and responses by Isis
The Tangent Function
Bobby is standing near a lighthouse. He measured the angle formed from where he stood to the top of the lighthouse and it was 30 degrees. Then he backed up 40 feet and measured the angle again and it was 25 degrees. Solve the height of the lighthouse.
asked on November 10, 2016 
Chemistry
A 5.00g sample of octane is burned in a bomb calorimeter containing 2.00x10 exponent2 g H2O. How much energyin calis released if the water temperature increases 6.00 Celsius?
asked on May 13, 2015 
math
Oregon, 2 1/4 %per month
asked on November 13, 2014 
Physics
The latent heat of fusion of alcohol is 50 kcal/kg and its melting point is 54oC. It has a specific heat of 0.60 in its liquid state. Calculate the energy needed to melt 2.0 kg of solid alcohol at 54o and raise it to a temperature of 4°C.
asked on June 18, 2013 
Physics
A pulley system lifts a 500lb block 1.0 foot with an effort of only 50 lb. If the 50 lb moves 30 feet, calculate the efficiency of the pulley system.
asked on June 18, 2013 
Physics
Calculate the total energy of 4.0 kg object moving horizontally at 20 m/s 50 meters above the surface. Please help me!!!!!
asked on June 18, 2013 
Physics
If an object is thrown in an upward direction from the top of a building 160 ft high at an initial speed of 30 mi/h, what is its final speed when it hits the ground?
asked on June 17, 2013 
Physics
A skydiver is jumping from an airplane traveling at 10.0 m/s. The plane is 3520 m above the earth. The sky diver pulls his cord at 1760 m above the earth. Neglecting air resistance, how far does the skydiver travel horizontally before pulling the cord?
asked on June 14, 2013 
Physics
If the airplane is traveling at a velocity of 320 km/h to the north, how long will it take to reach its destination if that destination is 2300 km to the north?
asked on June 14, 2013 
Physics
An object is thrown directly up (positive direction) with a velocity (vo) of 20.0 m/s and do= 0. Determine how long it takes to get to the maximum height of 24.0 m.
asked on June 14, 2013 
Physics
An object is dropped from a platform 100 feet high. Ignoring wind resistance, what will its speed be when it reaches the ground? _____ ft/s Please help me!!!
asked on June 14, 2013 
Physics
An object is dropped from a platform 100 feet high. Ignoring wind resistance, what will its speed be when it reaches the ground?
asked on June 13, 2013 
Physics
A rocket blasts off. In 10.0 seconds it is at 10,000 ft, traveling at 3600 mph. Assuming the direction is up, calculate the acceleration.
asked on June 13, 2013 
Physics
While traveling south on an expressway, a car traveling 60 mph (miles per hour) slows down to 30 mph in 12 minutes due to traffic conditions. Calculate the acceleration.
asked on June 13, 2013 
Physics
City B is northwest of City A, and the 400 mile trip by car takes 8 hours. The cities are 320 miles apart if able to travel in a straight line. What is the speed of a trip from City A to City B?
asked on June 13, 2013 
Physics
If the odometer on the car reads 25.0 km at the beginning of a trip and 65.0 km a half hour later, what is the average speed of the car? (Remember significant digits.)
asked on June 13, 2013 
Physics
A car travels 30 km north in 25 min. and 40 km east in 35 min. What is the total distance traveled?
asked on June 13, 2013 
Physics
To reach city A, you travel north for 2.00 hours covering 80.0 miles. You then turn due east and travel 45.0 minutes for another 20.0 miles to reach your destination. On the first leg of your trip (traveling north), what is your speed?
asked on June 12, 2013 
Physics
A caterpillar climbs up a onemeter wall. For every 2 cm it climbs up, it slides down 1 cm. It takes 10 minutes for the caterpillar to climb to the top. What is the distance traveled? (Round the number to the nearest hundred.) >How do you calculate this?
asked on June 12, 2013 
Physics websites
I just want to ask if there's a website in physics that you don't have to do the experiment on your own and you can just do it in the computer and study it and answer the question to that experiment/lab. I'm really having problems with my experiments and I
asked on June 11, 2013 
Physics
A car travels from City A to City B to the north. It takes 4 hours, and the road mileage is 200 miles. The map shows that the cities are only 80 miles apart (straightline distance). Calculate the average velocity and give the direction. :(
asked on June 10, 2013 
Physics
If a car travels 60 mi. north for onehalf hour, 100 mi. west for one hour, and 60 mi. south for 30 minutes, what is the total displacement of the car? PLEASE HELP ME!!!!
asked on June 10, 2013 
Physics**Scientist
Please help me with this!! I really can't find it. 1) This scientist used his device by dropped a spool of wire through a magnetic field. 2)This scientist used a torsional balance to show that the magnetic repulsion between magnetic poles varied by the
asked on May 30, 2013 
Physics***
1) Assume that you have two objects one with a mass of 10 kg and the other with a mass of 15 kg each with a charge of +3.0x10^6 C and separated by a distance of 2 m. What is the electric force that these objects exert on one another? 2) Determine what
asked on May 30, 2013 
Physics**
1) Assume that you have two objects one with a mass of 10 kg and the other with a mass of 15 kg each with a charge of +3.0x10^6 C and separated by a distance of 2 m. What is the electric force that these objects exert on one another? 2) Determine what
asked on May 29, 2013 
Precalculus...
How do you remove the 2 pi in this problem? csc 19pi/4 remove 2 pi > (8pi/4) > 11pi/4 > 3pi/4 >> i really don't know how do they the 2 pi twice so it would become 8pi. Please help me!
asked on May 20, 2013 
Physics SI unit
• what is the SI unit for electric force ?
asked on April 25, 2013 
Physics *Electrical Scientist* please help me!!!
* JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
asked on April 20, 2013 
Physics "scientists"
* JJ Thomson * a) How does his experiment of cathode ray tube relates to electrostatics? >> PLEASE HELP ME!! :( :)
asked on April 20, 2013 
Physics *Electrical Scientist* Please help me!!
* JJ Thompson * * what was he credited for discovering the cathode ray tube? * How does his experiment relate to electrostatics? >>PLease help me!!!! :)
asked on April 20, 2013 
Physics *Electrical Scientist* please help me!!!
* JJ Thompson * what was he credited for discovering the cathode ray tube? * How does his experiment relate to electrostatics? >>PLease help me!!!! :)
asked on April 19, 2013 
Physics Hear
1) Peter is heating water on the stove to boil eggs for a picnic. How much heat is required to raise the temperature of his 10.0kg vat of water from 20.0℃ to 100.0℃? Formula>> Q=mTcp 2)Under the spreading chestnut tree of the village blacksmith dunks
asked on April 11, 2013 
Physics Heat
1) Peter is heating water on the stove to boil eggs for a picnic. How much heat is required to raise the temperature of his 10.0kg vat of water from 20.0℃ to 100.0℃? Formula>> Q=mTcp 2)Under the spreading chestnut tree of the village blacksmith dunks
asked on April 10, 2013 
English III Love of Life By: Jack London
Love of Life by Jack London I'm really having problems, how to start the body of my essay in this story. Can you give me some hint, how to make the 1st step? thank you :)
asked on April 7, 2013 
English III Love of Life By: Jack London
Love of Life by: Jack London What is the cite of naturalism in the essay?? Please help me with this!! :( :) Thank you!!
asked on April 6, 2013 
Precal
Convert from DMS to Radians 1) 61degree 24' 2) 75degree 30' Convert from Radians to Degress 1) 2 2) 1.3 Please help how to solve and calculate it in calculator. I got confused. :( :)
asked on March 27, 2013 
Precalculus
Convert from DMS to Radians 1)61degree 24' 2) 75degree 30' Convert from Radians to Degrees 1) 2 2) 1.3 Please Help me, just tell me how to solve them and do it in the calculator.
asked on March 26, 2013 
Precalculus.
Wesley and Delia are playing a math game. Wesley gives Delia these step to follow. Step 1: Multiply a number by 6 and then subtract by 4. Step 2: Divide the result by 2 Step 3: Add 3 to the result from the second step. If Delia's final answer is 19, What
asked on March 25, 2013 
Precalculus
1) What is the equivalent of this? 5x(2x+7y)+7xy4x(y+3)
asked on March 23, 2013 
physics impulse
A 2 kg cart rolls across the floor and runs into the wall and sticks. Before the collision the cart has a velocity of 4 m/s in the x direction. The collision took place in 0.1 s. 1) What was the cart's momentum before the collision? 2) What was the cart's
asked on March 21, 2013 
English III Freedom Writers
have you watched the movie Freedom Writer? can you please help me with my assignment? 1) consider the reasons why the groups have been used. 2) How this representations of different cultural groups are challenging or stereotypical? PLEASE HELP MEEE!!!!!
asked on March 20, 2013 
Physics MOMENTUM
1) A 1 kg moving at 1 m/s ha s a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A 0.010n kg bullet is shot from a 0.500 kg gun at speed of 230 m/s. Find the speed of the gun.
asked on March 20, 2013 
Physics Impulse
A 2 kg cart rolls across the floor and runs into the wall and sticks. Before the collision the cart has a velocity of 4 m/s in the x direction. The collision took place in 0.1 s. 1) What was the cart's momentum before the collision? 2) What was the cart's
asked on March 20, 2013 
Physics Heat
1) While Laurie is boiling water to cook spaghetti, the phone rings, and all 1.5 kg of water boils away during her conversation.If the water was initially at 15℃, how much heat must have been gained for all of it to turn into a water vapor? 2)By January,
asked on March 20, 2013 
physics.
1) A racing car has a mass of 1525 kg. What is its kinetic energy if it has a speed of 35 m/s? * 23 Conservation of Momentum 2) A 3.0 kg ball is moving at 3 m/s and strikes a 1.5 kg ball moving at 2 m/s. After the collision, the 1.5 kg ball moves to the
asked on March 18, 2013 
Physics 11th grade 'Heat' `
1) While Laurie is boiling water to cook spaghetti, the phone rings, and all 1.5 kg of water boils away during her conversation.If the water was initially at 15℃, how much heat must have been gained for all of it to turn into a water vapor? 2)By January,
asked on March 16, 2013 
Physics 11th grade 'Heat' .
Finishing his ginger ale, Ramesh stands at party holding his insulated foam cup that has nothing in it but 0.100 kg of ice at 0℃. 1) In sentence above, How much more heat must be gained to raise the temperature of the melted ice to room temperature of
asked on March 15, 2013 
Physics 11th Grade "HEAT' 2
1) Emily is testing her baby's bath water and finds that is too cold,so she adds some hot water from kettle on the stove. If Emily adds 2.00 kg of water at 80.0 degree celcius to 20.0 kg of bath water at 27.0 degree celcius , what is the final temperature
asked on March 14, 2013 
Physics 11th grade 'Heat'
1) Nova, whose mass is 50.0 kg, stays out skiing for too long and her body temperature drops by 2.00 degree celsius . What is the amount of heat lost from Nova's body? (cHuman body= 3470 J/kg degre celcius) 2) Phoebe's insulated foam cup is filled with
asked on March 13, 2013 
Physics 11th grade 3
1) A box with a mass of 17 kg is moving at a velocity of 3.75 m/s. If the box was pushed with a force of 75 N how far did it go? 2) Calculate the momentum for a 0.18 kg rifle bullet traveling 369 m/s. 3) What is the impulse needed to stop the bullet? 4)Ice
asked on March 12, 2013 
Physics 11th grade 2
1) A 20 kg rock is on the edge of a 100 m cliff. a. What potential energy does the rock possess relative to the base of the cliff? b. The rock falls from the cliff. What is the kinetic energy just before it strikes the ground? c. What speed does the rock
asked on March 11, 2013 
Physics 11th grade
1) A racing car has a mass of 1525 kg. What is its kinetic energy if it has a speed of 35 m/s? 2) How much potential energy does Tim,with mass 60.0 kg, gain when he climbs a gymnasium rope a distance of 3.5 m? Benchmark Review
asked on March 10, 2013 
Physics ~please help me~
1.) Two people of the same mass climb the same flight of stairs. The first person climbs the stairs in 25 s; the second person does so in 35 s. a) Which person does more work?Explain b) Which person produces more power?Explain 2.) Lee pushes a 20 kg mass
asked on March 9, 2013 
Physics ~Thermodynamics~
* Pressure * 1) what other ways can the pressure of a gas be changed? * Internal Energy * 2) A cup of hot tea is poured from a teapot, and a swimming pool if filled with cold water. a) Which one has a higher internal energy? b) Which has a higher average
asked on March 5, 2013 
Precalculus
*polynomial in standard form 1)5/12+7/18=5/6 2) 3x/(x+1)1/(x)=______/x^21x
asked on February 28, 2013 
Precalculus
fraction 1) 5/12+7/185/6 2) 3x/x11/x=_____/x^21x 3) x+1/x^25x+63x+11/x^2x6= 4)2x^23x1 5) 3x^2+2x2 6) x^23x9 45 with formula B+_sqrt(B)^2+(4)(A)(C)/2A please help!
asked on February 27, 2013 
Physics Power
1.) How much energy does a 60 W light bulb consume in 1 hour? 2.) Beth pulled her brother (m=85 kg) in a 10 kg sled with a constant force of 95 N for 100 m. a) How much work did Beth do in moving her brother? b) How much power did she expend if it took her
asked on February 26, 2013 
Physics ~really need help!~
1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at
asked on February 25, 2013 
Physics ~please help me!~
1.)A 0.5 kg hockey puck moving at 35 m/s hits a straw bale, stopping in 1 s. a) What impulse is delivered to the ball? b) What force is exerted on the puck? 2.) A racing car with a mass of 1400 kg hits a slick spot and crashes headon into a concrete wall
asked on February 25, 2013 
Physics Impulse
1.)A 0.5 kg hockey puck moving at 35 m/s hits a straw bale, stopping in 1 s. a) What impulse is delivered to the ball? b) What force is exerted on the puck? 2.) A racing car with a mass of 1400 kg hits a slick spot and crashes headon into a concrete wall
asked on February 25, 2013 
Physics Conservation of Momentum
1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at
asked on February 25, 2013 
Physics Impulse part 2
1) A 0.50 kg object is at rest. A 3.00 N force to the right acts on the object during a time interval of 1.50 s a) What is the impulse? b) What is the velocity of the object at the end of this time interval? 2) A 2250 kg car traveling to the west at 20.0
asked on February 25, 2013 
Physics Conservation of Momentum
1) A 1 kg mass moving at 1 m/s has a totally inelastic collision with a 0.7 kg mass. What is the speed of the resulting combined mass after the collision? 2) A cart of mass 1 kg moving at a speed of 0.5 m/s collides elastically with a cart of mass kg at
asked on February 24, 2013 
Physics Impulse
1.)A 0.5 kg hockey puck moving at 35 m/s hits a straw bale, stopping in 1 s. a) What impulse is delivered to the ball? b) What force is exerted on the puck? 2.) A racing car with a mass of 1400 kg hits a slick spot and crashes headon into a concrete wall
asked on February 24, 2013 
Physics Momentum
1) Two 1 kg balls move away from each other, one traveling 5 m/s to the right, the other 5 m/s to the left. What is the magnitude of the total momentum of the system? 2) Two 1000 kg cars drive east; the first moving at 20 m/s, the second at 40 m/s. What is
asked on February 20, 2013 
Physics ~ CONSERVATION OF MOMENTUM ~
1.) A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? 2.) A 3.0 kg ball at 3 m/s and strikes a 1.5 kg ball moving at 2
asked on February 20, 2013 
Physics ~ CONSERVATION OF MOMENTUM~
1.) A 10,000 kg railroad car traveling at a speed of 24.0 m/s strikes an identical car at rest. If the cars lock together as a result of the collision, what is their common speed afterward? 2.) A 3.0 kg ball at 3 m/s and strikes a 1.5 kg ball moving at 2
asked on February 18, 2013 
Precalculus need help!!
Quadratic Formula 1.) x+6/x=7 2.) 4x/x+4 + 3/x1 = 15/x^2+3x4 3.) x+3/x  2/x+3 = 6/x^2+3x formula: B+ sqrt B^2 + (4)(a)(c)/2a f u only wanted to use the formula it's not necessary though. please help me! it's going to pass tomorrow!! please!
asked on February 18, 2013 
Physics ~IMPULSE~
a) A tennis racket a 450 N force on a 0.05 kg tennis ball over a 0.006 s time period. What is the impulse applied to the ball? b) A ball (0.5 kg) is thrown with a velocity of 15 m/s. A receiver catches the ball and brings it to rest is 0.02 s. a) What is
asked on February 17, 2013 
Physics ~MOMENTUM~
a) what is the momentum of a 4.6 kg baseball moving at 1.4 m/s? b) a child is running with a velocity of 4.5 m/s and has a momentum of 120 kgm/s. What is the child's mass? ~formula~ P=mv help please!!!
asked on February 17, 2013 
Physics ~please help me!
1.) A car (m=1200 kg) moves form 2.0 m/s to 15.0 m/s in 100 m. a) What is the initial kinetic energy of the car? b) What is the final kinetic energy of the car? c) what is the net work applied to the car? d) what force is applied to the car? 2.) A simple
asked on February 3, 2013 
Physics ~Conservation of Energy~ part 2
1.) A 500 kg roller coaster is pulled to the top of a hill 45 m high and arrives at the top with a zero speed. a) how much work has done by the vhain to pull the car to the top? b) how much potential energy does it have at the top? c)What is the total
asked on January 30, 2013 
Physics ~Conservation of Energy~
1.) At one point in its fall, an object (m=2.5 kg.) has a kinetic energy of 5 J(joule) and a potential energy of 10 J. a) what is the total energy of the system? b) what is the velocity at this point? The object continues to another point where its
asked on January 30, 2013 
Physics ~Work Kinetic Energy~
1.)A ball (m 0.5 kg) starts from rest and has 300 J(joule) of work applied to it. a) what is the initial kinetic energy of the ball? b) what is the final kinetic of the ball? c) what is the final velocity of the ball? 2.)A boy is doing chinup. If the boy
asked on January 30, 2013 
physics
an electron (m= 9.11 x 10^31 kg) and a proton (m+ 1.6 x 10^27 kg) are separated by 1.0 x 10^10 m. what is the gravitation force between them? help please!
asked on January 28, 2013 
Physics
The sun has a mass of 1.99x10 30 kg the earth has a mass of 5.98x10 24 kg and is 1.496x10 11 m from the sun a) Calculate the force of gravity acting on the eaarth by the sun b) CAlculate the force of gravity acting on the sun by the earth
asked on January 9, 2013 
Precal
f(x)= x+1 and g(x)= square root of x3 please help me!
asked on December 13, 2012 
physics
a child knocks a ball off a table with a height of 0.60 m. The initial velocity of the ball is 2.4 m/s. What will be the horizontal distance between the edge of the table and where the ball lands?
asked on November 29, 2012 
physics
an eagle flying in a horizontal path drops a twig from a height of 8.2 m. The twig travels 12 m horizontally before it hits the ground. What was the eagle's initial speed?
asked on November 29, 2012 
physics
a tennis ball is thrown vertically upward with an initial velocity of +8.0 m/s a) what is the velocity of the ball when it returns to its starting point? b) how long is the ball in the air? c) how high does the ball reach?
asked on November 29, 2012 
physics
a tennis ball is dropped from the top of 12.2 m tall building. b) how long does it take for the ball to hit he ground? c) what is the velocity of the ball the split second before it hits the ground?
asked on November 29, 2012 
physics
a ball is thrown up and reaches a maximum height of 5 m. a) what is the initial velocity of the ball? b) how long does it take for the ball to reach its maximum height? c) what is the final velocity of the ball? if i returns to where it was thrown from?
asked on November 29, 2012 
Macroeconomics
Wondering if I am doing this correctly?? If net taxes are increased by 3 billion dollars by how much would we expect real GDP to change? My answer is: d) If the government increases taxes by 3 billion dollars we would use the tax multiplier to determine
asked on November 4, 2012 
Physics
a bb gun has a muzzle velocity of 325 ft/sec. How long will it take the bb to hit the ground? How far will the bb travel?
asked on September 21, 2012 
English Vocab
For the sentence, The school administration declared a new rule that all students, even boys, must wear pink socks, but when questioned, they refused to ______________ upon the reasoning for this decision. In the blank, which word suits best? Expound or
asked on September 20, 2012 
Physics
A man pushes a lawn mower on a level lawn with a force of 200N it 40% of this force is directed downward how much woek is done by the man in pushing the mower 6.0m Q. It the man in the above question expended 60 W of power in pushing the mower 6.0m, how
asked on September 19, 2012 
Macroeconomics
Ok so this probably seems easy but I am not sure how to work these. We are given a table with data Price Paper Price 2010 2 100 2.5 2011 3 125 3 2012 4 150 3.5 we are usig 2011 as base year a) what is nomial GDP? b) Real GDP? c) GDP Price Index d) CPI Is
asked on September 12, 2012 
American Government
The Constitution created a confederate system of government?
asked on July 27, 2012 
American Government
Most amendments have _____. (A.) expanded and clarified the principles embodied in the Constitution B. radically changed and undermined the principles of the Constitution C. been approved just by Congress D. restricted the right to vote
asked on July 27, 2012 
American Government
With which of the following statements would the Founding Fathers have disagreed? A.Government, which exists to regulate the behavior of the people, must itself be regulated. (B.) For the sake of simplicity, all the powers of government should be
asked on July 27, 2012 
geometry
Write a flow proof:if angle 1 and angle 2 are vertical angles, and angle 2 and angle 3 are complementary, then angle 1 and angle 3 are complementary.
asked on March 9, 2011 
social studies
since warm air carries more moisture, what would you expect the climate to be like in the gulf stream
asked on February 6, 2011 
social studies
mahogany logs from central America sometimes wash up in scotland. how do you explain this?
asked on February 6, 2011 
social studies
early explorers sailing west across the Atlantic usually sailed south to the canary island, first. why do you think they did?
asked on February 6, 2011 
math
136+215÷3=
asked on November 8, 2010 
math
136+215÷3=
asked on November 8, 2010 
social studies
Who called for completeself government for the settlers in the North west territory.
asked on March 11, 2009

Math
12 necklaces will be made
posted on September 7, 2017 
math 6th grade
i dont really get it so help ussssssssss
posted on November 22, 2016 
health
Me too. lol
posted on December 21, 2013