annette
Most popular questions and responses by annette
Physics
a 5kg block is pushed 3m up a vertical wall with constant speed by a constant force of magnitude f applied at an angle of 30 degrees with the horizontal. if the coefficient of kinetic friction between block and wall is .3, determine the work done by a) f
asked on April 20, 2013 
physics
A 79kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s. (a) Calculate the mechanical work done by the sprinter during this time. J (b) Calculate the average power the sprinter must generate. W (c) If the sprinter converts food energy to
asked on April 29, 2013 
physics 70
A .275 kg. object is swung in a vertical circular path on a string .850 m. long. A) What are the forces acting on the ball at any point along this path? B) Draw freebody diagrams for the ball when it is at the bottom of the circle and when it is at the
asked on April 21, 2013 
Physics
Two blocks of masses m1 = 2kg. and m2 = 4kg. are each released from rest at a height of h = 5m. on a frictionless track, and undergo an elastic headon collision. a)Determine the velocity of each block just before the collision. b) Determine the velocity
asked on April 20, 2013 
english
what is the object pronoun of this sentence? the thief stole the expensive diamonds. should it be the thief stole them.
asked on March 24, 2009 
statistics
A sample of 352 subscribers to Wired magazine shows the mean time spent using the Internet is 13.4 hours per week, with a sample standard deviation of 6.8 hours. Find the 95 percent confidence interval for the mean time Wired subscribers spend on the
asked on March 19, 2012 
Chemistry 152
to obtain the rate of the reaction 5Br(aq) +BrO3 (aq) + 6H+ (aq) 3Br2(aq) + 3H2O(l) you might follow the Br concentration or the BrO concentration.How are the rates in terms of these species related?
asked on December 6, 2013 
math
Josh has 5/8 of a foot of plywood. To finish building the deck, he needs five time that amount. How many feet of plywood does Josh need? A.) 3 feet B.) 3 1/2 feet C.) 3 1/8 feet D.) 3 2/9 feet
asked on December 10, 2014 
Chemistry
Calculate the volume of concentrated reagent required to prepare the diluted solutions indicated: (a) 18 M H2SO4 to prepare 225 mL of 2.0 M H2SO4 (
asked on December 21, 2011 
physics
A 79kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s. (a) Calculate the mechanical work done by the sprinter during this time. J (b) Calculate the average power the sprinter must generate. W (c) If the sprinter converts food energy to
asked on April 29, 2013 
math
Ms. Johnson's class is having a pizza party. If there are 14 students and 7 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza that each student receives? A.) 1/3 B.) 1/4 C.) 1/2 D.) 1/8
asked on December 9, 2014 
physics
An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the
asked on April 29, 2013 
physics
A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 g piece of copper at 84°C. The other sample has a mass of 58 g and is originally at a
asked on April 29, 2013 
english
If you are writing a formal paper, how do you write 1600s (as in the century)? Is there an apostrophe: 1600's? Thank you for using the Jiskha Homework Help Forum. This is what the MLA guide says concerning dates: Full dates when written in the text may be
asked on May 13, 2007 
physics
A nuclear power plant has an electrical power output of 1900 MW and operates with an efficiency of 32%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 106 kg/s, what is the rise in temperature of the flowing water? °C
asked on April 29, 2013 
chem
Will someone help me with this problem, please? Calculate the mass in grams of 1.20*10^24 molecules of CO2. Well, convert it to moles of CO2. number moles= 1.2*1024/avagnumber Now, you take the molecular mass of CO2 (12 + 2*16) and multiply that by the
asked on March 21, 2007 
art
what did the artist most likely do to create this piece of art? A. had no prior knowledge of perspective B. investigated the scenery before painting it C. chose the colors that were pleasing rather than accurate D. omitted the use of proportion to keep
asked on December 1, 2014 
physics
A 22.0L tank of carbon dioxide gas (CO2) is at a pressure of 9.40 105 Pa and temperature of 22.0°C. (a) Calculate the temperature of the gas in Kelvin. K (b) Use the ideal gas law to calculate the number of moles of gas in the tank. mol (c) Use the
asked on April 29, 2013 
American history
Which of the following best describes the columbian exchange that occurred during the age of discovery
asked on May 31, 2013 
chemistry
49kg woman cheats on her diet and eats a 582Calorie (582 kcal) jelly doughnut for breakfast. (a) How many joules of energy are the equivalent of one jelly doughnut? J (b) How many stairs must the woman climb to perform an amount of mechanical work
asked on April 29, 2013 
thermal heat
Consider the following. (a) Find the work done by an ideal gas as it expands from point A to point B along the path shown in the figure. MJ (b) How much work is done by the gas if it compressed from B to A along the same path? MJ
asked on April 29, 2013 
physics
In a running event, a sprinter does 4.9 105 J of work and her internal energy decreases by 9.1 105 J. (a) Determine the heat transferred between her body and surroundings during this event. J (b) What does the sign of your answer to part (a) indicate?
asked on April 29, 2013 
physics
An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the
asked on April 29, 2013 
physics 52
A car rounds a banked curve where the radius of curvature of the road is R=100m., the banking angle 10 degrees and the coefficient of static friction is .10 (slippery conditions). A) Determine the range of speeds the car can gave without slipping up or
asked on April 21, 2013 
Math
A moving truck fills up a shipment at an old address, at (2,1). It travels 7 blocks south and 6 blocks east to the new address. What is the location of new address?
asked on April 28, 2011 
Chemistry
How many moles of Cu are required to produce 16.25 g of H2O
asked on July 13, 2017 
ethics
Viktor Frankl states that it is ______ to define lifes meaning in broad and sweeping terms. a. Necessary. b. Easy. c. Impossible. d. Possible but very hard.
asked on November 28, 2014 
physics
An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the
asked on April 29, 2013 
algebra
perform the product in simplified form please show the work. (2x+1)(3x2)
asked on December 11, 2009 
4th grade
A MAN HAS 6 HOUSES. INEACH HOUSE HE KEEPS 6 CATS. EACH CAT HAS 6 WHISKERS. AND ON EACH WHISKER SIT 6 FLEAS. A. HOW MANY CATS ARE THERE? B. HOWMANY WHISKERS ARE THERE ON ALL THE CATS? C.HOW MANY FLEAS SIT ON ALL THE CATS' WHISKERS? D. ANSWER THE LAST LINE
asked on January 8, 2009 
criminal investigations
do the objectives of a criminal investigation change with the type of investigation
asked on December 7, 2011 
healthcare
Is quality related to culture? Why or why not?
asked on June 26, 2010 
Algebra I
Suppose you throw a ball up in the air from the top of a 160 foot building. It's height h in feet after t seconds is given by the function h= 8t^ + 48t + 160 a) When does the ball reach it's maximum height? b) What is the ball's maximum height? c) How
asked on March 6, 2017 
calculus
Implicit diff. y^2 + 4xy +4y^2=40 2yy'+ _______ + 8y*y=0 I am confused with the 4xy. Would you write this out to be 4x*y'+4y OR 4x*4y' + 4y*4x'? Please help
asked on October 5, 2014 
Algebra
During a hurricane evacuation from the east coast of Georgia, a family traveled west. For part of the trip, they averaged but as the congestion got bad, they had to slow to If the total time of travel was 7 hours, how many miles did they drive at the
asked on August 12, 2013 
electricity and electronics
a battery consists of five cells connected in series if the voltage developed by each cell is 1,5 the total voltage developed by the battery is 5 x 1.5 = 7.5 V Battery voltages add when connected in series.
asked on August 10, 2005 
Chemistry
How many moles of Cu are required to produce 16.25 g of H2O
asked on July 13, 2017 
Algebra
Suppose you throw a ball up in the air from the top of a 160 foot building. It's height h in feet after t seconds is given by the function h= 8t^ + 48t + 160 a) When does the ball reach it's maximum height? b) What is the ball's maximum height? c) How
asked on March 6, 2017 
medicall billing and coding
I need research to do a paper on POA INDICATORES. with penn foster
asked on September 12, 2013 
physics
Consider the following figure. (a) Determine the work done on a fluid that expands from i to f as indicated in the figure. J (b) How much work is done on the fluid if it is compressed from f to i along the same path? J
asked on April 29, 2013 
math
A sheet of cardboard measures 9 feet by 6 feet. Gina makes the entire sheet of cardboard into a closed box that is a perfect cube. What is the surface area of the box?
asked on January 24, 2013 
math
i am a number between 20 and 30. when you put me into 6 equal groups, there is an even number in each group and 1 is left over. what number am i?
asked on April 25, 2011 
math
If the recipe for 4 pancakes is 6tbsp flour and 1/4 pint milk how much milk and flour would you use for 1/4, 1/2, 2, 5, and 3 pancakes?
asked on December 20, 2012 
Nutrition
Josephine is a 20 year old female who is present for an eating disorder not otherwise specified. She currently teaches salsa lessons at the community college and is in her last semester of college. She reports she is living at home and the food her mom
asked on June 6, 2011 
statistics
What is the correct methodology for defining null and alternative hypothesis? Give an example
asked on June 4, 2010 
algebra
perform the indicated operation and give the answer in simplified form. 6x^2y^3(3xy^2)^2 _________________ xy^2
asked on December 11, 2009 
maths
Solve k^2 + km = 8 m = k 6 Can you show me stepby step please?
asked on September 21, 2009 
Maths
Solve k^2 + km = 8 m = k 6 Can you show me stepby step please?
asked on September 21, 2009 
Calculas
Can someone please walk me through the steps for the following Partial derivatives problems: f(x,y) = x^7  8y  3, find x and y f(x,y) = 7 / 5x+4y, find x and y
asked on June 11, 2008 
Calculas
Can someone walk me through the following questions: Partial Derivatives f(x,y) = x^7 8y 3 find x and y f(x,y) = 7 / 5x + 4y, find x and y
asked on June 11, 2008 
Mathematics
When 8 is added to 2 times a number the sum is 32.what is the number. Is it 16 or 4
asked on April 26, 2016 
math
How do you know 1 and 2/3 divided by 3 and 1/2 has to be less than 1/2, without calculating the quotient? Please explain :)
asked on March 21, 2014 
Chemistry
The temperature of 550. g of water is increased from 16.0 degrees Celsius to 28.2 degrees Celsius by burning fuel. How many joules of energy is needed to increase the temperature of the water to 28.2 degrees?
asked on February 5, 2014 
math
the length of the base of a triangle is 4 times its altitude. if the area of a triangles is 162cm2 find the altitude
asked on February 11, 2011 
statistics
what are a couple of benefits and limitations of manual calculations?
asked on June 16, 2010 
statistics
how can I start a introduction off for a statistical paper?
asked on May 28, 2010 
Literature
I am really having trouble with the convention in literature could I have some examples?
asked on August 22, 2007 
electricity and electronics
a transformer has a primany voltage of 115 v and secondary voltage of 24 v if the number of tures in the primany is 345 how many turns are in the secondary The voltage ratio Vsecondary/Vprimary = 24/115 = 0.209 This equals the turns ratio
asked on August 10, 2005 
Science
State and explain five causes of disability in children during the post natal period.
asked on September 25, 2017 
Math
I am charged 80 cents for a 15 minute phone call. How much is that call per minute?
asked on April 21, 2017 
MATH
my overall score including my final is a 72 did I pass
asked on March 4, 2016 
History
Descride 5 reasons for the outbreak of the Haitian revolution
asked on October 15, 2014 
Strayer
Choose two dimensions, describe them, and explain the relationship between your chosen dimensions. Provide at least two examples to support your explanation.
asked on February 9, 2014 
english
I need help paraphrasing this paragraph. Because addiction treatment aims to change deeply embedded habits, relapse can be part of the process. However, this is a wellknown feature of diabetes, hypertension, asthma, and other chronic diseases with
asked on January 19, 2014 
Chemistry
How many moles of Al(OH) are required to completely react with 2.75mol of H2SO4?
asked on February 13, 2013 
math
If the recipe for 4 pancakes is 6tbsp flour and 1/4 pint milk how much milk and flour would you use for 1/4, 1/2, 2, 5, and 3 pancakes?
asked on December 19, 2012 
scientist
Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard
asked on February 24, 2011 
racial.ethnics
What does the future hold for HispanicLatino panethicity? I assume we will all continue to mix with each other, but will there be anything else?
asked on May 11, 2010 
scientist
How did leeuwenhoek's work influence us today?
asked on April 4, 2010 
business
The vast majority of inside directors are from all but one of the following
asked on December 24, 2009 
algebra
perform the operation and simplify the answer. sqrt 12x^3 . sqrt 3xy^2 Please show work.
asked on December 11, 2009 
college biology
What does enhance genetic diversity?
asked on November 17, 2009 
algebra
Dustin drives 5 miles per hour faster than Kelly. If he leaves town 1 hour after Kelly and they travel in opposite directions, they will have drive equal distances after Dustin has traveled 7 hours. How far apart are they?
asked on September 24, 2009 
science
is life processes a function that a living thing performs to stay alive and produce more of its own kind
asked on May 26, 2009 
Healthcare
What is being done to implement the reform of socialization and care givers?
asked on March 15, 2009 
english
choose the inflected form that is most likely to appear in a dictionary entry and why fastest craziest dogs taller
asked on February 4, 2009 
english
whichwordisaninflectedformthatismostlikelytoappearinadictionaryentryandwhyfastestcraziestdogsortaller
asked on February 4, 2009 
Algebra
create an englis representing an algebraic relationship An English what? Sentence?
asked on July 31, 2007

Algebra I
and that can't be factored
posted on March 6, 2017 
Algebra I
t^2  6t  20 = 0
posted on March 6, 2017 
Algebra I
If I divide the quadratic equation by a 8 wouldn't it be t^  6t  20 = 0
posted on March 6, 2017 
riddle
Time
posted on February 22, 2017 
Math
How to figure out the ratio to 4.518 And 80.810.1 512256
posted on December 15, 2016 
algebra
Jill earns $150 plus 15% commission how much is her income
posted on November 30, 2016 
social studies PLEASE HELP
Hi!!! I'm doing an home work on the four types of sphere. when it rains what happen...🔑🗝🔐🔒🔒
posted on April 26, 2016 
American History
All of the above
posted on February 2, 2016 
payroll
Kipley Company is a small manufacturing firm located in Pittsburgh, Pennsylvania. The company has a workforce of both hourly and salaried employees. Each employee is paid for hours actually worked during each week, with the time worked being recorded in
posted on November 11, 2015 
English
Either you must stop eating my food from the refrigerator or you must pay me for it. What sort of conjunction is used in the sentence? A. Coordinating B. Correlative C. Common D. Subordinating
posted on October 13, 2015 
intro to computers
Your Boss is considering a BYOD program for your company. He asks you if there are any negatives to such a program. What do you tell him.
posted on February 18, 2015 
Geography
the answer is A secondary just took test
posted on November 20, 2014 
Le math
A. (17 • 6) + (20 • 10) B. (17 • 20) – (14 • 10) C. (17• 6) + (14 • 10) D. (17 • 20) – (7 • 14)
posted on September 16, 2014 
Le math
ik
posted on September 16, 2014 
math homework help
107826.25
posted on July 1, 2014 
Child Development
Research shows that the____ is an important factor in a child's development
posted on February 20, 2014 
Science
a
posted on November 4, 2013 
Math
IN A TRIANGLE THE TWO LARGER ANGLES DIFFER BY 10 DEGREE. tHE SMALLER ANGLE 50 DEGREE LESS THAN THE LARGEST ANGLE. WHAT IS THE MEASURE
posted on April 12, 2013 
Research skills
A. 530 C68s 1985 B. 530.1 A12f 1976 C. 530.028 M52c D. 530 A82u 1988 E. 530.0274 C52e
posted on January 13, 2013 
statistics
man cholesterol is 175mg/dl , standard deviation 20mg/dl..approximate normal distribution..what percentage has cholesterol above 155mg/dl? thanks..
posted on July 7, 2012 
criminal investigations
that is exactly what i thought too, the main objective is to solve the crime that is being investigated. thank you Ms. Sue
posted on December 7, 2011 
healthcare
thanks
posted on June 26, 2010