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Questions Asked on January 22, 2012

a ball of mass 8kg falls from rest from a height of 100m.neglecting air resistance,calculate its total energy after falling a
1. 21 answers
2. asked by valentino anthony
3. 6,873 views
Burning 32 g of CH4 in excess oxygen will produce how much CO2 according to the equationCH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)
1. 20 answers
2. asked by heens
3. 6,353 views
calculate the energy, in joules and caloriesrequired to heat 25.0g of water form 12.5 deg. celcius to 25.7 deg. celcius i know
1. 1 answer
2. asked by shaun
3. 2,931 views
A chemical reaction is run in which 132 joules of work is done by the system amd the internal energy changes by 469 joules.
1. 2 answers
2. asked by Hannah
3. 2,914 views
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
1. 7 answers
2. asked by David
3. 2,911 views
_______ is the study of how to increase resources andcreate conditions that will make better use of resources. A. Resource
1. 1 answer
2. asked by Heather
3. 2,872 views
Given that a sample is approximately bell-shaped with a mean of 60 and a standard deviation of 3, the approximate percentage of
1. 1 answer
2. asked by Dawn
3. 2,827 views
How many moles of atoms are in one mole of AlPO4?
1. 1 answer
2. asked by Diana
3. 2,518 views
1. Is it farther to go from Venezuela to Bolivia or Venezuela to Cuba? Venezuela to Bolivia2. What is the name of the salt lake
1. 6 answers
2. asked by Reed
3. 2,483 views
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
1. 7 answers
2. asked by Anonymous
3. 2,401 views
a farmer wants to put a fence around a rectangular field and then divide the field into three rectangular plots by placing two
1. 1 answer
2. asked by Mary
3. 2,187 views
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
1. 1 answer
2. asked by WLP
3. 2,080 views
In the Daytona 500 auto race, a Ford Thunderbird and a Mercedes Benz are moving side by side down a straight-away at 66.5 m/s.
1. 2 answers
2. asked by sarah
3. 1,881 views
The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to
1. 1 answer
2. asked by ThuyD
3. 1,747 views
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
1. 1 answer
2. asked by Robert
3. 1,709 views
Based on the balanced equation2NBr3 + 3NaOH → N2 + 3NaBr + 3HOBr calculate the number of of excess reagent units remaining
1. 1 answer
2. asked by Kyle
3. 1,624 views
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
1. 1 answer
2. asked by john
3. 1,556 views
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
1. 9 answers
2. asked by mo
3. 1,542 views
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
1. 1 answer
2. asked by john
3. 1,467 views
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
1. 7 answers
2. asked by I need a answer to this ASAP please help
3. 1,410 views
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
1. 1 answer
2. asked by Anna
3. 1,384 views
Find the surface area of a conical grain storage tank that has a height of 42 meters and a diameter of 20 meters. Round the
1. 1 answer
2. asked by Ash
3. 1,369 views
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
1. 1 answer
2. asked by Tarisha
3. 1,369 views
A 1500 kg car traveling at 17.6 m/s to thesouth collides with a 5000 kg truck that is initially at rest at a stoplight. The car
1. 5 answers
2. asked by Angel
3. 1,364 views
Several outside groups regularly monitor the activities of Metro Chemical Corporation. These groups are interested in the firm's
1. 0 answers
2. asked by Anonymous
3. 1,338 views
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
1. 2 answers
2. asked by jay
3. 1,320 views
how can the concept of specific heat capacity of water be used to explain the heating and cooling patterns of oceans and climate
1. 1 answer
2. asked by Skye
3. 1,262 views
when hydrogen is fitted into reactivity series of metals , it comes immediately after
1. 3 answers
2. asked by didi
3. 1,254 views
Hydra are small freshwater animals. They can double in number every two days in a laboratory tank. Suppose one tank has an
1. 1 answer
2. asked by Jane
3. 1,220 views
how do you solve this.prove: cos2A plus cosA divided by sin2A minus sinA equal to cos2A plus 1 divided by sinA
1. 1 answer
2. asked by lungisile ntobela
3. 1,174 views
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. 1 answer
2. asked by Summer
3. 1,171 views
Find the area of a circle circumscribed about an equilateral triangle whose side is 18 inches long.
1. 1 answer
2. asked by cat
3. 1,171 views
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 <
1. 1 answer
2. asked by amber
3. 1,142 views
The total sales of a company in 2008 were $45,000. In 2011, it grew to $84,000. Use� as the number of years since 2000 and � as
1. 2 answers
2. asked by Marta P
3. 1,108 views
The axes being inclined at an angle of 30°, find the equation to the straight linewhich passes through the point(-2,3) and is
1. 1 answer
2. asked by Kewal
3. 1,040 views
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
1. 2 answers
2. asked by john
3. 1,025 views
Data collected on volcanic eruptions give a mean time between eruptions of 29 months. Assume these eruptions occur as a Poisson
1. 0 answers
2. asked by sand
3. 1,022 views
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
1. 2 answers
2. asked by mo
3. 1,016 views
Can you give me a 1 paragraph example of casual analysis? Its for my report in English. Thank you so much! :)
1. 1 answer
2. asked by Irish
3. 1,010 views
The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to
1. 0 answers
2. asked by Thuy Nguyen
3. 1,003 views
In 1-2 paragraphs answer the following:What was the Truman Doctrine and how did it come about?
1. 1 answer
2. asked by Diesel
3. 996 views
Which is NOT a responsibility of the Department of Agriculture?1. The opening of foreign markets to U.S. agricultural products
1. 3 answers
2. asked by Help
3. 976 views
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
1. 6 answers
2. asked by Hannah
3. 976 views
At a teacher’s conference on the first Saturday in November in Palm Springs, CA, 100teachers meet in a large room. Each
1. 1 answer
2. asked by lily
3. 965 views
2)Which of the following equations represents a reaction for which the delta H can be called a standard enthalpy of formation,
1. 2 answers
2. asked by Hannah
3. 964 views
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
1. 1 answer
2. asked by Jazmyne
3. 936 views
Can someone guide me on how to solve this problem: A sample of 52 night students ages is obtained in order to estimate the mean
1. 1 answer
2. asked by concy
3. 933 views
A ball is droped from a height of 16 m on each bounce, it rebounds 0.5 of the distance it fell how far has the ball traveled.
1. 1 answer
2. asked by Abdela said yimer
3. 928 views
A 42.5 kg student runs down the sidewalk andjumps with a horizontal speed of 4.16 m/s onto a stationary skateboard. The student
1. 1 answer
2. asked by Angel
3. 914 views
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
1. 3 answers
2. asked by Joy
3. 911 views
why ice floats on water?
1. 1 answer
2. asked by akshat
3. 904 views
The number 3136 is the sum of the first how many odd whole numbers?
1. 3 answers
2. asked by lily
3. 901 views
A 200.0 kg astronaut and equipment move with a velocity of 2.00 m/s toward an orbitingspacecraft. The astronaut will fire a
1. 1 answer
2. asked by sarah
3. 889 views
Which is NOT a responsibility of the Department of Agriculture?1. The opening of foreign markets to U.S. agricultural products
1. 1 answer
2. asked by Help
3. 866 views
Please show me how to solve:Doctors can use radioactive iodine to treat some forms of cancer. The half-life of iodine - 131 is 8
1. 1 answer
2. asked by Jane
3. 865 views
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
1. 1 answer
2. asked by annonymous
3. 831 views
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,
1. 7 answers
2. asked by 12-year-old-poet
3. 828 views
i have 2 questionsstoichiometry loss of CO2 1. record the amount of CO2 produced vs the amount of Na2CO3. I did 7 beakers with
1. 4 answers
2. asked by janey
3. 827 views
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
1. 2 answers
2. asked by andreya
3. 808 views
Are we affected more by nature or nurture growing up?Nature being a person’s genes determining their physical and behavioral
1. 10 answers
2. asked by Rebecca
3. 804 views
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?
1. 1 answer
2. asked by Cori
3. 797 views
An insulated beaker contains 250.0 grams of water at 25C. Exactly 41.6 g of a metal at 100.0C was dropped in the beaker. The
1. 4 answers
2. asked by bob
3. 786 views
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
1. 1 answer
2. asked by adeyeni
3. 785 views
Given a right circular cone, you put an upside-down cone inside it so that its vertex is at the center of the base of the larger
1. 0 answers
2. asked by Mari
3. 783 views
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
1. 1 answer
2. asked by john
3. 776 views
The fetal pig does not have functional lungs, since the lungs are not being used is there any need to transport blood tot he
1. 1 answer
2. asked by Annie
3. 771 views
In a group of 9 coins, one is fake and weighs slightly more. What is the fewest numberof times you need to use a pan balance to
1. 1 answer
2. asked by claudia
3. 761 views
if we multiply a fraction by itself and divide the product by its reciprocal,the fraction thus obtained is 512/27.the original
1. 2 answers
2. asked by shruti
3. 758 views
A boy throws the ball vertically upwards with an initial velocity of 15m\s,what is the magnitude and direction of the ball
1. 1 answer
2. asked by soul
3. 744 views
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
1. 0 answers
2. asked by annonymous
3. 740 views
How had U.S. policy toward Europe changed by the end of 1947? Why did this change occur?
1. 1 answer
2. asked by kiana
3. 727 views
in all but what way does lightning shape our perspective
1. 1 answer
2. asked by vanessa
3. 722 views
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
1. 1 answer
2. asked by Sarah
3. 717 views
The number 3136 is the sum of the first how many odd whole numbers?
1. 1 answer
2. asked by lily
3. 713 views
How did king leopold develop his image as a great humanitarian leader?
1. 2 answers
2. asked by Carlos
3. 705 views
let fbe a function that is even and continuous on the closed interval [0,3]. the function f and itsderivatives have the
1. 0 answers
2. asked by Melanie
3. 701 views
Consider a collection of biased coins, each showing Heads with probability and Tails with probability , independently of the
1. 1 answer
2. asked by sand
3. 689 views
An artifact was found and tested for its carbon-14 content. If 76% of the original carbon-14 was still present, what is its
1. 1 answer
2. asked by Anonymous
3. 685 views
issued 20,000 shares of common stock in exchange for land, buildings, and equipment with fair market prices of $55,000, $120,000
1. 0 answers
2. asked by tammu
3. 677 views
If $100 is invested at 6% compundedA - annually B - quarterly C - monthly what is the amount after 4 years? How much interest is
1. 2 answers
2. asked by Tina
3. 675 views
A model rocket is launched straight upward with an initial speed of 30.0 m/s. It accelerates with a constant upward acceleration
1. 1 answer
2. asked by desperate help
3. 670 views
f (x)= {$50 if 0< x <60}{��_4_�� 3 X - 30 if x >60} What is the cost if the repair man works for 45 minutes? What is the
1. 2 answers
2. asked by Tracy S
3. 666 views
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
1. 1 answer
2. asked by Joy
3. 664 views
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
1. 0 answers
2. asked by westwood
3. 660 views
Can someone please help me to understand the steps in the process of scientific inquiry?
1. 2 answers
2. asked by Patiance
3. 658 views
Why is a pizza cutter handle a lever?
1. 1 answer
2. asked by Annie
3. 654 views
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
1. 0 answers
2. asked by Tiana
3. 650 views
A rock concert, 5.17 10-6 watts/cm2D = dB
1. 1 answer
2. asked by Anonymous
3. 649 views
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
1. 0 answers
2. asked by annonymous
3. 647 views
During a Science day learners use a plastic cold drink bottle as a rocket.They use a bicycle pump to increas the presure inside
1. 1 answer
2. asked by Thabang
3. 642 views
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
1. 3 answers
2. asked by AaA
3. 637 views
Using the FIFO method of inventory pricing, what is the dollar value ending inventory if there were 300 units on hand December
1. 0 answers
2. asked by Terry
3. 633 views
View the results for a hypothetical psychology test psychology test. Then, create a report with the following:The mean score for
1. 3 answers
2. asked by p
3. 631 views
What did George Kennan mean by “containment”? Why did he think it would be a successful strategy?
1. 4 answers
2. asked by Kiana
3. 631 views
One mole of H2O(g) at 1.00 atm and 100.°C occupies a volume of 30.6 L. When one mole of H2O(g) is condensed to one mole of
1. 0 answers
2. asked by Anonymous
3. 627 views
The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea
1. 1 answer
2. asked by Anonymous
3. 627 views
Over a time interval of 2.15 years, the velocity of a planet orbiting a distant star reverses direction, changing from +18.9
1. 1 answer
2. asked by Isaac
3. 626 views
If instead, the swimmer makes 30.5 laps in the same pool in 3 h, determine the total distance the swimmer traveled, the
1. 1 answer
2. asked by lauren
3. 617 views
A lightyear is a unit of length equal to the distance that light travels in 1 year. What is 1lightyear expressed in units of
1. 1 answer
2. asked by Cynthia
3. 616 views
For the reactionAl(s) + 3 HCl(aq)->AlCl3(s) +3/2 H2(g) it was observed that when 4.00g of aluminum reacted with excess HCl,
1. 4 answers
2. asked by Hannah
3. 614 views

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