
physics cant firgure this out
A Carnot air conditioner maintains the temperature in a house at 298 K on a day when the temperature outside is 310 K. What is the coefficient of performance of the air conditioner?
asked by peter on December 10, 2010 
Mathematics
The daytime temperature in Sutherland was recorded as 9 degrees Celsius. During the night the temperature dropped by 16 degrees Celsius. Express an equation?
asked by Mustard on November 5, 2015 
Physics
Two ideal gases have the same mass density and the same absolute pressure. One of the gases is helium (He), and its temperature is 298 K. The other gas is neon (Ne). What is the temperature of the neon?
asked by Frustrated on December 3, 2012 
chemitry
A block of aluminum with a volume of 98.5 cm3 absorbs 67.4 J of heat. If its initial temperature was 32.5°C, what is its final temperature? (density of aluminum = 2.70g/cm3)
asked by Alyssa on September 21, 2012 
Bloemhof Gekombineerde Skool
The daytime temperature in Sutherland was recorded as 9 degrees Celsius. During the night the temperature dropped by 16 degrees Celsius. Express an equation?
asked by Masetshaba on November 5, 2015 
Chemistry
A piece of iron (Cp = 0.450 J/(gi°C)) that has a mass of 21.5 g and an initial temperature of 100.0°C is submerged in X g of water (Cp = 4.184 J/(gi°C)) at 20.0°C. The temperature of the system (iron and water) changes to 21.4°C. What is the value of
asked by Jess on February 22, 2015 
Chemistry
what mass of precipitate will form if a saturated solution of potassium nitrate is dropped from a temperature of 70 degrees celsius to a temperature of 45 degrees celsius?
asked by Abby on May 18, 2015 
Chemistry
Two solid objects, A and B, are placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g water at 10.0 degrees Celsius. Object A increases the water temperature by 3.50
asked by Samantha on December 1, 2010 
Science
A piece of unknown metal with a mass of 68.6 grams is heated to an initial temperature of 100 Celsius and dropped into 42 grams of water with an initial temperature of 20 Celsius in a calorimeter the final temperature of the system is 52.1 Celsius the
asked by Raven on September 18, 2016 
AP Chemistry
Two solid objects, A and B, are placed in boiling water and allowed to come to temperature there. Each is then lifted out and placed in separate beakers containing 1000 g water at 10.0 degrees Celsius. Object A increases the water temperature by 3.50
asked by Samantha on December 2, 2010 
Identifying Furniture Styles & Periods
1. Which one of the following elements is characteristic of Gothic furniture? A. Melonbulb turnings B. Tracery designs C. Carving of acanthus leaves D. Animal shapes 2. A sideboard is a A. type of card table. B. dropleaf table. C. chest of drawers. D.
asked by Suzan on August 3, 2011 
Physics
A ball and a thin plate are made from different materials and have the same initial temperature. The ball does not fit through a hole in the plate, because the diameter of the ball is slightly larger than the diameter of the hole. However, the ball will
asked by Chase on November 9, 2012 
Intermediate Algebra
You are 6 feet in height. If you are standing away from the base of the lamppost, you can see where your shadow stops. If you are 10 feet from the base of the lamppost and your shadow stops 5 feet from where you stand, what is the height of the lamppost?
asked by Please Help! :) on December 10, 2012 
Intermediate Algebra
You are 6 feet in height. If you are standing away from the base of the lamppost, you can see where your shadow stops. If you are 10 feet from the base of the lamppost and your shadow stops 5 feet from where you stand, what is the height of the lamppost?
asked by Anonymous on December 9, 2012 
engineering science
The power in a resistor RLOAD of 10 Ω when connected to a 100 volt supply is measured using a voltmeter and ammeter. There are two possible ways of connecting the meters as shown in FIGURE 2. The resistances RA and RV represent the internal resistances of
asked by David on December 9, 2010 
Physics
2. State whether each of the following would be apt to produce systematic or random errors in these experiments and explain why: (a) the corners of the cylinder are slightly rounded; (b) the end faces of the cylinder are parallel to each other but not
asked by Sean on March 13, 2011 
environmental science
Nashville, Tennessee has precipitation year round, and it can get pretty miserable when the summer hits ( average temperature 79'F). Winters are mild with the coolest month average temperature at 37'F. What climate is it? a) Not Temperate b) Humid
asked by pam on September 1, 2010 
Statistics check
Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O  Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct to
asked by Tracy 10 on June 25, 2013 
math
Street  Horizontal  Vertical rise Distance ft. of street ft. ___________________________________ Dixie hill 80.  40 Bell hill  80.  20 Liberty hill 80.  60 Which hill is the steepest? Explain. A. Bell hill; it rises one foot for for every 4 feet
asked by sad with math on April 26, 2015 
biology
1. Which sentence from the section "Line Graphs" BEST introduces when to use a line graph to display information to the reader? A line graph uses dots connected by lines to show how amounts change over time. A dot over each month would represent the
asked by person on January 22, 2018 
math
one hundred feet directly overhead, a plane and a dirigible start flying due east. If the plane travels three times faster than the dirigible, what is the greatest angle of sight between the two vehicles from your position? Assume the plane passes from
asked by Yen on May 2, 2010 
Statisitcs
The mean height of fully grown birch trees are 18 feet with a standard deviation of 1.2 feet, normally distributed. Random samples of size 9 are drawn from this population and the mean of each sample is determined. Find that mean and the standard error of
asked by D on November 14, 2012 
Math
x=square footage of a house y=asking price in thousands of the house. x goes from 1200 square feet to 1500 square feet. the regression equation is y^= .0686x+83.24 A. what are the explanatory and response variables? B. Interpret the slope. C. Is it
asked by Trisha on December 17, 2015 
english
The fishing having become so poor, we packed up camp and moved to another lake. past participial phrase noun clause adverb clause nominative absolute elliptical clause
asked by marie on November 7, 2014 
Physics
two campers in a national park hike from their cabin to the same spot on a lake each taking a different path. the total distance traveled along path 1 is 7.5 km and that along path 2 is 8.2 km. what is the final displacement of each camper?
asked by Jay on October 7, 2016 
AP Biology  Starch
Hello, I'm in deep need of your knowledge. If you may help me, I would appreciate it. The question is regarding the high catalyzation of starch, since it breaksdown at 100 C, why is the high temperature needed? Thanks Sally As I remember, the action of
asked by Sally on September 28, 2006 
PreCalc/Trig
A body was found at 6 a.m. outdoors on a day when the temperature was 50oF. The medical examiner found the temperature of the body to be 66oF. What was the approximate time of death? Use Newton's law of cooling, with k = 0.1947. A. Midnight (12 a.m.) B. 5
asked by Anonymous on December 30, 2014 
science
Cagliari, on the island of Sardinia, receives almost no summer rain Its average summer temperature is 76'? and average winter temperature is 50'F What climate is it? a) humid subtropical b) not temperate c) Mediterranean d) Marine west coast c
asked by pam on September 2, 2010 
Math
What descriptive statistical information is needed in order to determine if a current temperature of 75degree is a departure from the average temperature of 65 for that date of the year in that particular location, if the record low is 35 and record high
asked by Shelby on June 11, 2013 
physics
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115°F. Six months later the temperature has dropped to 2°F.How much space now exists between each rail?
asked by Jason on October 21, 2014 
Chemistry
You mix 45 ml of .20M HCl with 45 ml of .20M KOH in a calorimeter. The temperature of both reactions before mixing is 21.5oC. The temperature rises for the mixture to 22.7oC after mixing. What is the enthalpy change per mole of water produced?
asked by Jessica on July 22, 2015 
Physics
Assume a goose has a 2.0cmthick layer of feather down (on average) and a body surface area of 0.14 m2 . What is the rate of heat loss (conduction only) if the goose, with a body temperature of 41 ∘C, is outside on a winter day when the air temperature
asked by Bernardo on January 28, 2016 
chemistry
Question Part Points Submissions Used A swimming pool, 20.0 m ✕ 12.5 m, is filled with water to a depth of 3.85 m. If the initial temperature of the water is 18.9°C, how much heat must be added to the water to raise its temperature to 28.7°C? Assume
asked by D on March 25, 2014 
Chemistry
It took 400 calories of heat to raise 50 mL of water from 20 degrees Celsius to its final temperature. What was that temperature? Ok I understand the equation q=mass x SH x change in temp. I am lost on how to set it up to find my final temp. Please help.
asked by Shambrey on March 14, 2011 
physics...damon please help
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115°F. Six months later the temperature has dropped to 2°F.How much space now exists between each rail?
asked by Maranda on October 22, 2014 
Science
Ten pounds of liquid water is at a temperature of 180 degrees F at standard atmospheric conditions. Determine the energy required to convert this to water vapor (steam) at a temperature of 212 degrees F.
asked by Anil on September 3, 2012 
math
Hello lovelies♡ I don't get this problem but hopefully you can help this girl out, hehe! One reading at an Artic research station showed that the temperature that it was six hours ago. What was the temperature in Smalltown six hours ago? Thanks and Have
asked by Julie Jules on September 27, 2017 
physics
assume that a hailstone at 0 degrees celsius falls through air at a uniform temperature of 0 degrees celsius and lands on a sidewalk also at this temperature. from what initial height must the stone fall in order to entirely melt upon impact?
asked by ann on July 27, 2011 
Math
The number N of bacteria in a refrigerated food is given by N(T) = 10T2 − 20T + 700, 1 ¡Ü T ¡Ü 20where T is the temperature of the food in degrees Celsius. When the food is removed from refrigeration, the temperature of the food is given by T(t) = 5t
asked by Kristi on October 15, 2012 
physics
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115°F. Six months later the temperature has dropped to 2°F.How much space now exists between each rail?
asked by Jason on October 21, 2014 
physic
four moles of gas are contained in 2 litre vessel at the temperature of 200c at a pressure of 10atm.the gas is allowed to expand to anew volume of a 4litres ,but at the same time maintening the original temperature.what is the new pressure?
asked by Anonymous on April 26, 2013 
Chem.
A balloon has a volume of 240 mL at room temperature (25°C or 298 K). What temperature would you have to heat or cool the balloon to in order to change its volume to 360 mL (Answer in Kelvin)? please write out the formula and how you solved this so I can
asked by Sandee on September 12, 2017 
Maths
At 7pm the outdoor temperature was 12degrees celsius. By 11pm the temperature in degrees celsius had dropped x degrees celsius. Which expression represents the temperature reading at 11pm. a 12x b 12+x c12 d 12x e 12 a is my answer A total of m
asked by Claire on August 14, 2013 
Math
Projectile motion: Let's suppose you throw a ball straight up with an initial speed of 50 feet per second from a height of feet. a) Find the equation that describes the motion as a function of time. My answer was x = 0 and y=16t^2+50t+6 b) How long is the
asked by Abbey on April 16, 2010 
Math
A large elm tree died after it was struck by lightning. The property owner thinks he can remove it himself, but is concerned that it will fall on his greenhouse. He takes several measurements before attempting to cut it down. At 3 PM he measures the shadow
asked by Flora on January 31, 2016 
physics(please help...very urgent.....)
A ball is hit at an angle of 36 degrees to the horizontal from 14 feet above the ground. If it hits the ground 26 feet away (in horizontal distance), what was the initial velocity? Assume there is no air resistance. i have posted the same question earlier
asked by arun on April 12, 2011 
3rd grade Grammar
I can't figure out if the teacher is trying to trick me. I'm supposed to find the plural subject in the following sentences. I can't find a plural subject. Can you help me. 1. Yellowstone National Park is in Wyoming. (can't figure this out) 2. This park
asked by Claire on March 3, 2009 
Math
1. Write a rule to describe the translation of a point from (3,3) to (2,2). a. (x,y) > (x  1, y + 1) b. (x,y) > (x + 1, y + 1) c. (x,y) > (x  1, y  1) d. (x,y) > (x + 1, y  1) 2. The coordinates of an ordered pair have opposite signs. In
asked by Indigo on May 26, 2015 
Physcis
As two trains move along a track, their conductors suddenly notice that they are headed toward each other. The figure gives their velocities v as a function of time t as the conductors slow the trains. The figure's vertical scaling is set by vs = 29.0 m/s.
asked by Nidhi on January 30, 2017 
math
Yolanda is putting up a fence for her dog in the shape of a square. Each foot of fencing costs $7. If Yolanda is planning to have each side of the fence be 10 feet long, how many feet of fencing will Yolanda need?
asked by Nina on September 19, 2012 
calculus
A fence 5 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by sonia on November 21, 2012 
Calculus
fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Anonymous on November 6, 2014 
Calculus
A fence 8 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by JAY Z on April 30, 2014 
Math
Clark has 7 1/2 feet of wire. Part A. How many 3/4 foot pieces can Clark cut from the 7 1/2 feet of wire? Part B. Using the information in Part A, interpret the meaning of the quotient in terms of the two fractions given.
asked by Anonymous on July 20, 2016 
Intermediate Algebra
A model rocket is launched from a height of 50 feet. the formula: h=16t^2+70t+50 describes the rocket's height,h,in feet t seconds after it was launched. how long will it take the rocket to reach the ground.
asked by nicole on November 19, 2012 
Math
A fence 3 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Anonymous on March 21, 2017 
Math
A deepsea exploring ship is pulling up a diver at the rate of 25 feet per minute. The diver is 200 feet below sea level. How deep was the diver 10 minutes ago?
asked by Mo on October 18, 2016 
Calculus
A fence 6 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Pete on July 13, 2010 
geometry
A flower bed in the corner of your yard is in shape of a right triangle. The perpendicular sides of the bed measure 6 feet 8 inches and 8 feet 4 inches. Calculate the area of the flower bed.
asked by kim on March 4, 2012 
Calculus
A fence 2 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Anonymous on October 28, 2011 
Algebra
A ramp leads up to a building. The top of the ramp is 4 feet above the ground, and the bottom is 14 feet from the building. what is the length of the ramp? I think the answer is 18 ft. choices are: A. 18.6ft B. 18ft C. 14.6ft D. 10ft
asked by Anonymous on June 13, 2014 
Math
A fence 4 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Salman on November 7, 2009 
Math: Calculus
A fence 6 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by REALLY NEED HELP!!!! on October 29, 2010 
Calc Help Please
A fence 2 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building? Help!
asked by Anonymous on August 8, 2013 
Calculus
A fence 6 feet tall runs parallel to a tall building at a distance of 20 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Ashlyn on April 22, 2018 
math
Jay is going to cover his kitchen floor with tiles that are each 1 square foot. The floor is shape in a rectangle that is 4 feet wide and 9 feet long. How many tiles are needed to cover the floor.
asked by mona on March 23, 2016 
Math
A turtle crawls up a 12 foot hill after a heavy rainstorm. The turtle crawls 4 feet, but when it stops to rest, it slides back 1 1/2 feet. How many tries does the turtle make before it makes it up the hill?
asked by Mathew on October 10, 2011 
Calc
A fence 5 feet tall runs parallel to a tall building at a distance of 5 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Manny on April 5, 2009 
Calculus
A fence 3 feet tall runs parallel to a tall building at a distance of 7 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Alessandra on November 5, 2014 
Geometry
Larry has a ladder that is 16' long. If he sets the base of the ladder on level ground 5 feet from the side of the house, how many feet above the ground will the top of the ladder reach when it rests against the house?
asked by Nena on February 6, 2014 
algebra
The strength of a wood beam varies inversely with its length. A beam is 33 feet long can support 1200 pounds. How much weight can a similar beam support if it is 23 feet long?
asked by alex on February 11, 2012 
calculus
A fence 5 feet tall runs parallel to a tall building at a distance of 3 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by sonia on November 21, 2012 
math
Suppose an object is dropped from a height h0 above the ground. Then its height after t seconds is given by h=−16t^2+h0, where h is measured in feet. If a ball is dropped from 48 feet above the ground, how long does it take to reach ground level?
asked by Marie on September 7, 2015 
calculus
A fence 4 feet tall runs parallel to a tall building at a distance of 5 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by zama on November 8, 2009 
Calculus
A fence 4 feet tall runs parallel to a tall building at a distance of 6 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Anonymous on October 28, 2011 
Math
An object is projected directly upward from the ground. Its distance in feet from the ground in t seconds is s equals s=112t−16t^2 The object will be 160 feet from the ground after () second(s) and after () second(s). The object strikes the ground
asked by Greg on April 18, 2016 
Calculus
A fence 4 feet tall runs parallel to a tall building at a distance of 2 feet from the building. What is the length of the shortest ladder that will reach from the ground over the fence to the wall of the building?
asked by Anonymous on April 20, 2015 
College Chem 2
Calculate the solubility Ag2CrO4(s) in a 0.100 M solution of AgNO3 and compare its solubility with Ag2CrO4 solubility in pure water at room temperature. The Ksp for Ag2CrO4 is 9.0 x 10^12 at room temperature. The Kspfor Ag2CrO4 at room temperature in pure
asked by Avery on December 9, 2016 
math
Leah is two years old. She stacked cubes to make the figure shown. If one cube has a length of one centimeter and volume of one cubic centimeter, what's the volume of Leah's figure
asked by Knyla on February 22, 2016 
English  ms. sue
this be last question What figure of speech portrays the wharf’s ‘crooked legs stockinged in barncales”? where else do it occur? How do it further the description? I not get this one I think the figure of speech be personification but I not get where
asked by Mohammad on March 28, 2012 
Chemistry
The figure (Figure 1) shows the reaction of element A (lavender spheres) with element B (tan spheres). Write the balanced chemical equation for this reaction in terms of A and B.
asked by just need help on April 10, 2019 
Physics
Use conservation of energy to determine the angular speed of the spool shown in Figure P8.36 after the 3.00 kg bucket has fallen 3.20 m, starting from rest. The light string attached to the bucket is wrapped around the spool and does not slip as it
asked by Nicole on October 26, 2011 
measurement
A tree in Melaine's yard is 35 feet tall. Melanie is 5 feet tall. The tree is how many times as tall as Helen?
asked by stella on January 5, 2012 
Math
Rafi had a board that was 15/1/2 feet long.he cut three pecies off the board that are each 3/7/8 feet long.how much off thw board is left?
asked by Jayshell on September 6, 2018 
Algebra
The height of Tower A is 940 feet more than Tower B. The two towers have a combined height of 1,540 feet. What are the heights of each tower?
asked by Sarah on May 22, 2016 
math
at 2 p.m., the level of the water in the pool was 10 feet. at 6 p.m., the level of water was 2 feet. find the constant rate of change in the water.
asked by macail on March 6, 2012 
8th Grade Algebra
Taylor's front porch is rectangular. The length is 3 feet more than the width. The perimeter of the porch is 14 feet. What is the width of the porch?
asked by Kayleen on January 11, 2014 
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 by Annette on April 29, 2013 
physics
In Figure P4.30, m1 = 10.5 kg and m2 = 4.5 kg. The coefficient of static friction between m1 and the horizontal surface is 0.60 while the coefficient of kinetic friction is 0.30. Figure P4.30
asked by nat on February 21, 2010 
geometry
216 in cubed is the volume of a figure 27 in cubed is the volume of a similiar figure what is the scale factor?
asked by Nasser on March 23, 2011 
math
The busy Mother pours herself a coffee into a paper cup before making her way to the amusement park. The coffee temperature is 35 C when the cup is placed on the kitchen counter. The Mother needs to tend to her son and her coffee is forgotten. When the
asked by emily on April 6, 2018 
calculus
Coroners estimate time of death using the rule of thumb that a body cools about 2 degrees F during the first hour after death and about 1 degree F for each additional hour. Assuming an air temperature of 70 degrees F and a living body temperature of 98.6
asked by Anonymous on November 29, 2010 
math
A carpenter is constructing a triangular roof for a storage shed as shown in the figure. Part A isosceles triangle = 15 degrees and 15 degrees length of bas is 45 How high will the peaks of the rise above in the top of the shed? b/2 = 22.5 tan(15) = h/22.5
asked by kudu on November 27, 2015 
Calculus
I really need help with this problem an automobile accelerates from rest at 1 + 3(square root)t mph/sec for 9 seconds. How far does it travel in those nine seconds? I have found that the velocity, after nine seconds, is 63 I have figuredout the answer but
asked by James on April 1, 2007 
physics
A 1.3 block of ice is initially at a temperature of 3.5. If 6.6×105 of heat are added to the ice, what is the final temperature of the system? Find the amount of ice, if any, that remains. Suppose the amount of heat added to the ice block is doubled. By
asked by katelyn on November 22, 2010 
lwtech
In order to build a bridge across a river, a surveyor is hired to find the distance across the river. The surveyor places a stake on either side of the river. As shown in the diagram below (the diagram is not drawn to scale). He measures the bearing to the
asked by Anonymous on June 25, 2014 
math
PHIL'S WIFE ROWENA, IS DECORATING A PORTION OF THE KITCHEN WALL BEHIND THE STOVE IN A MOSAIC MADE UP OF EQUAL NUMBERS OF BLACK,WHITE, AND RED TILES. THE SPACE MEASURES 6 FEET BY 2 FEET. THE MOSAIC TILES ARE 6 INCH SQUARES. HOW MANY RED TILES ARE REQUIRED?
asked by pinky on February 12, 2013 
Math B
The path of a rocket fired during a fireworks display is given by the equation s(t)=64t2,( t do the 2nd power) where t is the time in seconds and s in the height in feet. What is the maximum height in feet the rocket will reach? In how many seconds will
asked by Caroline on January 29, 2010 
Math7 grade
An architectural drawing has a scale of 2 in=5 feet. If living room is 15 feet by 18 feet ,what is the living room size . What is the area of the living room in drawing. What is the area of actual. Living room . How do they compare. Using proportion and
asked by Ina on November 2, 2016 
science
what will cold air moving over a warm body of water create? A)a rain shadow affect B)lake effect snow C)an urban heat island D)higher temp. My answer is B, am i right of not please tell me your answer
asked by May on November 15, 2012
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