
Physics
A force sensor is used to measure a force applied to a 7.5 kg box on a hard, horizontal surface. It records that the box starts to move when the force is equal to 16.5 N. This force makes the box start to move with an acceleration of 0.5 m/s2. Find s and k
asked by Bella on September 30, 2009 
Math
Ralph brought his car to the mechanic to be repaired. The total bill including parts and labor was $445. The parts cost $120. He also paid d dollars per hour for 5 hours of labor. Which equation can be used to find the number of dollars, d, he paid per
asked by Keyla on November 3, 2016 
Physics
Sense I'm not taking Physics C but Physics B I guess I'm not expected to find the value of the drag force sense that would involve soem calculus. I just have a question though. If we performed a lab outside wouldn't the drag force vary from time to time
asked by Phyiscs on August 9, 2009 
physics
You are watching an archery tournament when you start wondering how fast an arrow is shot from the bow. Remembering your physics, you ask one of the archers to shoot an arrow parallel to the ground. You find the arrow stuck in the ground 50.0 m away,
asked by sagi on October 20, 2010 
Physics
You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its maximum horizontal range. You shoot the gun straight up, and it takes 3.8 s for the dart to land back at the barrel. What is the maximum
asked by Tina on October 17, 2011 
chemistry
The molar heat of solution of a substance is found to be +35.34 kJ/mol. The addition of 0.20 moles of this substance to 1.5 L water initially at 55. °C results in a temperature decrease. Assume the specific heat of the resulting solution to be equal to
asked by kate on February 16, 2011 
Math
A circle C has center at the origin and radius 9. Another circle K has a diameter with one end at the origin and the other end at the point (0,17). The circles C and K intersect in two points. Let P be the point of intersection of C and K which lies in the
asked by Salman on February 5, 2010 
Physics
A large flatbed truck hauls a heavy wood crate as shown. The crate is not tied down and simply rests on the metal bed of the truck. Find the maximum acceleration the truck can have if the crate is not to slide along the truck bed. (Static friction is 0.5
asked by Sara on November 5, 2014 
Calculus
A circle C has center at the origin and radius 9. Another circle K has a diameter with one end at the origin and the other end at the point (0,17). The circles C and K intersect in two points. Let P be the point of intersection of C and K which lies in the
asked by Salman on February 5, 2010 
history
what are the two towns near boston that in 1775 the first battles of the american revolution fought in? See below. =) Whatis the answer? you said see below but there's no answer. Writeacher wants you to look at the Wikipedia website that she linked in her
asked by Mack on February 18, 2007 
Accounting
On April 1, 2013, Ringo Company borrowed $20,000 from its bank by using a 9%, 12 month note, with the interest to be paid on the maturity date. I need to know the amount of interest on the maturity date, the names of accounts the amount goes under, then I
asked by Larry on February 28, 2016 
Math
A bag contains 5 slips of paper. On each slip is written the name of a member of the Avila familyMr.Avila,Mrs.Avila,their son,or one of their 2 daughters. Find the probability of each outcome if you take a piece of paper out of the bag without looking.
asked by Lance on November 28, 2011 
physics
Q.1.Find the total mechanical energy in one time period? my sir says that it is (1/2)mw^2A^2 but according to me it should be 1/4mw^2A^2.How? Q.2.The total mechnical energy of a spring mass system in SHM is E = (1/2)mw^2A^2.Suppose the oscillating particle
asked by anonymous on December 25, 2009 
physics
A man pushing a mop across a floor causes the map to undergo two displacements. The first has a magnitude of 200 cm and makes an angle of 120° with the positive x axis. The resultant displacement has a magnitude of 240 cm and is directed at an angle of
asked by grace on September 10, 2011 
trigonometry
An observer at A looks due north and sees a meteor with an angle of elevation of 70deg. At the same instant, another observer 30miles east of A, sees the same meteor and apprroximates its position as N 50deg W but fails to note its angle of elevation. Find
asked by Winsel on August 10, 2010 
Math
You want to create an open rectangular box from a rectangular box. from a square piece of cardboard 20 inches by 20 inches. You will cut a 3 inch square from each corner. Draw a diagram and find the length of the box. Can someone help me with this diagram
asked by Olivia on August 24, 2014 
math
The sides of the outside square in the figure are 8 inches long. The corners of the next smaller square are at the midpoints of the outside square, and so on. a.) find the sum of the perimeters of the first three squares. Imagine that the process of
asked by Jennifer on October 25, 2015 
Math
Find The Area of the composite figure The shape has 5 sides with 3 right angles. The upper side has 14 inches; the left side has 12 inches, the base has 20 inches, and the right side has 10 inches A. 120 in. squared B. 234 in. squared C. 228 in. squared *
asked by ER98 on February 18, 2019 
Maths
A circle C has center at the origin and radius 9. Another circle K has a diameter with one end at the origin and the other end at the point (0,17). The circles C and K intersect in two points. Let P be the point of intersection of C and K which lies in the
asked by Salman on February 5, 2010 
Physics
You have a 30g quarter on an old LP turntable at a radius of 30 cm from the turntable's center. If the coefficient of Friction between the coin and the turntable is 0.6, at what speed will the coin slide off the turntable? Hint: this is a circular motion
asked by Trevor on November 18, 2007 
Chemistry
What volume of 0.01 M NaOH should be required to raise the pH of a litre of 25 mM H2SO4 to 4.0? I started out by attempting to find the initial pH of H2SO4 and determined I need 2.57 units of pH to raise it to 4. I know that somewhere I use the HH
asked by Sara on September 22, 2013 
Algebra
Beth is a bush pilot in Alaska. On a recent trip, she flew 600 miles with a tail wind in four hours. On the return trip, it took five hours to fly the 600 miles against the wind. Find the speed of the plane with no wind. Could you please explain how to
asked by Delia on June 8, 2009 
math
find the constant of proportionality and unit rate for the data in the table. Then write the equation to represent the relationship between time t and distance d Time Distance 2 t 90 miles 3 hrs 135 miles 5 hrs 225 miles 6 hrs 270 miles i need to show how
asked by Natasha on April 4, 2017 
physics
c) A 0.26kg rock is thrown vertically upward from the top of a cliff that is 32 m high. When it hits the ground at the base of the cliff the rock has the speed of 29 m/s. Assuming that the air resistance can be ignored, find i. the initial speed of the
asked by charley on September 6, 2012 
phy
1. A Uniform rod AB 3m long weighing 3 Kg is held horizontally by two strong vertical strings at its ends. A weight of 7 kg is hanging on the rod at a distance of 1m from end A and another weight of 12 Kg is hanging at 0.5 m from end B.(a)Make the free
asked by shiva on August 24, 2010 
Math
One end of a rope is tied to the top of a pole which is 30cm long and the rope is pulled tant then the other and is tied to a peg on the level ground.the angle of elevation which the rope makes with the ground is 55 degree celsius. Find the distance from
asked by Anonymous on March 7, 2012 
statistics
A new treatment for AIDS is to be tested in a small clinical trial on 15 patients.The proportion p^ who respond to the treatment will be used as an estimate of the proportion p of (potential)responders in the entire population of AIDS patients. If in fact
asked by todd on February 15, 2008 
Physic
A uniform plank of length 3 m is supported by two wooden trestles L and M as shown in the diagram above. L exerts a force of 80n upwards and M a force of 160N upwards. M is O.5m from the centre of gravity of the plank. calculate the weight w of the plank
asked by juanita on February 26, 2017 
Precalculus
Consider an opentop box constructed from an 8.5 × 11 inch piece of paper by cutting out squares of equal size at the corners, then folding up the resulting flaps. Denote by x the sidelength of each cutout square. a) Draw a picture of this construction,
asked by Arian on May 2, 2016 
Statistics
Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the
asked by Abbey on February 27, 2015 
Math: Calculus
Can someone help me out here with these two problem? I have know idea where to start. 1)The equation: 10(x1)(x2)(x3)=1, has three real solutions a
asked by REALLY NEED HELP!!!! on November 4, 2010 
History
“Without consideration of ‘traditions’ and prejudices, it [Germany] must find the courage to gather our people and their strength for an advance along the road that will lead this people from its present restricted living space to new land and soil,
asked by Sarah on April 22, 2016 
Science
1.You notice green scum floating on the surface of a pond. How can you tell whether these organisms are plants? 2.Explain, using an example how water may become polluted 3.Why is conservation important today? 4.Most people drive cars and heat their homes
asked by CONATY on April 15, 2013 
Math help ms sue.
Multiple Choice 1. Write the ratio in the simplest form. 45:15 (1 point) 9:3 3:1 1:3 4:1 2. Solve the following proportion. r over five equals nine over twentyone (1 point) r = 2.14 r = 9 r = 11.66 r = 37.8 3. Sarah’s mother has a miniature village
asked by josh on December 16, 2013 
physics
A 40.2kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of 1.84 m/s. Her hands are in contact with the wall for 1.17 s. Ignore friction and wind resistance. Find the average force
asked by BrookeNeed on October 27, 2016 
physics
A 40.2kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of 1.82 m/s. Her hands are in contact with the wall for 1.16 s. Ignore friction and wind resistance. Find the average force
asked by anonymous on November 4, 2018 
Physics
A 51.2kg skater is standing at rest in front of a wall. By pushing against the wall she propels herself backward with a velocity of 1.99 m/s. Her hands are in contact with the wall for 1.20 s. Ignore friction and wind resistance. Find the average force
asked by Jojo on July 26, 2019 
Physics
If vector a and b are two non collinear unit vectors and vector a+ vector b=√3 then find the value of ( vector a vector b).(2 vector a+ vector b)
asked by DEEPTI on July 8, 2017 
Physics
A swimmer tries to go straight across a river that is 500m wide. The swimmer can swim at 1.5m/s. There is a current of .05m/s downstream. Calculate a) the actual velocity of the swimmer b) how long it will tale to reach the far shore c) how far donstream
asked by Sally on February 8, 2009 
Physics  urgent!!!
A swimmer tries to go straight across a river that is 500m wide. The swimmer can swim at 1.5m/s. There is a current of .05m/s downstream. Calculate a) the actual velocity of the swimmer b) how long it will tale to reach the far shore c) how far donstream
asked by Sally on February 8, 2009 
mathStatistics
I need help with the following questions and appreciate any and all help given. 1. Faced with rising fax costs, a firm issued a guideline that transmissions of 10 pages or more should be sent by a 2day mail instead. Exceptions are allowed, but they want
asked by Gayla on June 8, 2008 
physics
After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between
asked by tom on March 14, 2016 
physics
A spherically symmetric object, with radius R = 0.700 m and mass M = 1.90 kg, rolls without slipping across a horizontal floor, with velocity V = 1.200 m/s. It then rolls up an incline with an angle of inclination θ = 40.0 deg and comes to rest a distance
asked by Juicy on November 3, 2015 
Maths
Please, I still need help with this. I need to make tables of values for both horizontal and vertical stretching, but I wasn't in class and missed the lesson. I don't really understand how to get the values; at first I figured you'd get the value of y by
asked by Isobelle on September 14, 2008 
Maths
I need to make tables of values for both horizontal and vertical stretching, but I wasn't in class and missed the lesson. I don't really understand how to get the values; at first I figured you'd get the value of y by just pluging in whatever value of x
asked by Isobelle on September 14, 2008 
Physics
In an action movie, the villain is rescued from the ocean by grabbing onto the ladder hanging from a helicopter. He is so intent on gripping the ladder that he lets go of his briefcase of counterfeit money when he is 130above the water. If the briefcase
asked by Michelle on September 13, 2012 
american education
· · Post response to the following: The classroom is increasingly becoming a diverse arena. Students from all walks of life and with various abilities and challenges come together in a single classroom today. In an effort to incorporate every student’s
asked by scooby91320002 on June 26, 2008 
Physics
The work function for potassium is 2.24eV. If potassium metal is illuminated with light of wavelength 310 nm, find the maximum kinetic energy of the photoelectrons. I have tried everything and still keep getting the wrong answer. The speed of light is 3 ×
asked by Emily on April 13, 2010 
particle in a box
Find the ground state energy of a particle restricted to move in one dimension subject to the potential below using perturbation theory. The box is like a normal box except it has a step in the middle of it making it have 2 wells with length a and the
asked by Jill on April 19, 2009 
Maximal area and dimensions of a window
Hey Jiskha, came across this problem in my maths homework and I can't seem to solve it. Can someone maybe help me out? A Norman window has the shape of a rectangle with a semi circle on top; diameter of the semicircle exactly matches the width of the
asked by Frank on November 14, 2016 
physics
After placing a 0.500 m dent in the landlords van, the two management students are told they and their 200 daN beer freezer have to go. The new ramp is inclined at an angle of 32.1 o relative to the horizontal. The coefficient of static friction between
asked by tom on March 13, 2016 
Trigonometry (Logarthims)
Give checks to the following two questions Use logarithms and the law of tangents to solve the triangle ABC, given that a=21.46 ft, b=46.28 ft, and C=32°28'30" without logarithms i can do this problem easily and i have. but when i try solving it with
asked by Anon on February 24, 2011 
English
I have to do an essay and i have trouble answering some of the questions.Thnaks!I need help with the second question.(its anthropology) 1)whatare Different forms that marriages take in the world? Polygany, monogamy, polygny, polyondry,exogomy & exogomy.
asked by Amber on December 10, 2011 
algebra
A ladder is resting against a wall. The top of the ladder touches the wall at a height of 15 feet and the length of the ladder is one foot more than twice the distance from the wall. Find the distance from the wall to the bottom of the ladder. (Hint: Use
asked by astrid on April 2, 2008 
MATH
The height h (in meters) of a cannonball t seconds after it is fired into the air is given by h=4t^2+16t+9. a) What is the initial height of the cannonball? What feature does this correspond to on the graph? b) Find the height of the cannonball after 1
asked by Josh on March 8, 2014 
Maths
A number of two digits is such that four times the unit digit is five times greater than the tens digit. When the digits are reversed,the number is increased by nine. Find the number
asked by Anonymous on September 12, 2018 
Math Please check
Please double check me Find the median of the following set of numbers 47,20,52,35,58,57 a. 49 1/2 b 47 c 48 1/2 d 52 Answer: a Which of the following numbers are integers? 2/3, 35, 0.093,650, 42.5 a 0.093 and 42.5 b 35 and 650 c 2/3 d 650 answer: c
asked by Sherri on March 23, 2008 
Algebra
Use synthetic division to find P(3) for P(X)= x^4  2x^3  4x + 4 So I know how to do synthetic division and all, but I'm still somehow not coming up with the correct answer! Below is my work so far. Please help me interpret it so that I can get the
asked by Mitch n' Joey on December 1, 2017 
algebra
The total toll charge for one car and five bicycles to cross a bridge is $7.50. The toll for a car is $1.50 more than for a bicycle. Find the cost for a car to cross the bridge.
asked by Jake on September 10, 2012 
Geometry
I have a circle with 2 lines that are connected and tangent to the circle. The lines are CA and CB angle ACB is 50 degrees. Arc AB inside of the tangent lines is X degrees find X
asked by Aaron on June 3, 2009 
Math
Will is five feet tall. He casts a 3 feet shadow at the same time that a tree casts a 9 feet shadow. Use similar triangles to find the height of the tree.
asked by Lillia on November 29, 2012 
Math Please check
Please double check me Find the median of the following set of numbers 47,20,52,35,58,57 a. 49 1/2 b 47 c 48 1/2 d 52 Answer: a Which of the following numbers are integers? 2/3, 35, 0.093,650, 42.5 a 0.093 and 42.5 b 35 and 650 c 2/3 d 650 answer: c
asked by Sherri on March 23, 2008 
physics
The red laser light used in supermarket scanners has a wavelength of 633 x 109 m. (This is 633 nanometers, 633 nm). Find the frequency of the red laser light.
asked by Tim on April 16, 2012 
maths percentage
in a 400ml can of mixed juice, 41% is MAngo Juice, 3205% is pineapple juice and the rest is water. find the volume of Mango, pineapple and water ?
asked by maria on October 23, 2016 
physics
a 5.1 kg bucket water is raised from a well by a rope. the acceleration of gravity is 9.81 m/s^2. if the upward acceleration of the bucket is 4.5m/s^2, find the force exerted by the rope on the bucket of water.
asked by Mayra on January 20, 2011 
math
three(3) cards are drawn from a deck of playing cards.find the probability that the first card is red,the second card is a black king,and the third card is a black king
asked by crystal on March 12, 2012 
math
In a school, 156 students passed geography or history. There were 75 students who passed in both subjects. If 9 more passed Geography than history, find how many were taking each subject
asked by Daniel on July 29, 2019 
data management
For MAMMALS, find the munber of: a) 7letter words b) 7letter word beggining with MA c) 4letter words i) all letters different ii) 2 letters same,2 different iii) 2 pairs same letters iv) 3 letters same
asked by Lisa on January 19, 2008 
math
If the sides of a square are lengthened by 8cm, the area becomes 144 cm^2 Find the length of a side of the original square. The length of a side of the original square is?cm
asked by Tina on February 4, 2010 
Trig
The angle of depression from the top of the building to a point on the ground is 29degrees30', the point of the ground is 36 meters from the top of the building. Find the height of the building
asked by SK on November 28, 2010 
math
a number rounds off to 4000.The digit in the hundreds place is twice the digit in the tens place.The sum of the digits is 12.The number uses only two different digits.Find the number.
asked by rosemarie on July 14, 2016 
Math
Kevin has a triangle table cloth with side lengths of 5 inches,12 inches. He wants to cover a right angle triangle table cloth. Find if the cloth is appropriate for the
asked by Davena on March 13, 2017 
Math
There are 10 egg sandwiches, 6 chicken sandwiches and 4 tuna sandwiches on a tray . A sandwich is randomly chosen. Find the probability an egg sandwich is chosen .
asked by Sam on May 9, 2018 
Algebra
Write an equation of the direct variation that includes the point (–3, –9). Direct variation can be expressed with this equation: y = kx Using your point, let's find k. 9 = 3k 3 = k Equation: y = 3x Thanks it makes sense
asked by Todd on March 20, 2007 
probability statistics
A jar contains 6 red, 7 white, and 7 blue marbles. If a marble chosen at random. Find the following probabilities? A)P(red) B)P(white) C)P(red or blue) D)P(red and white)
asked by charles on August 10, 2016 
maths
In TRIANGLE ABC points P,Q,R arethe points lies inside triangle in such a way that Ap= PR, BQ=QP &QR=RC n area of triangle PQR =100 then find the Area of ABC
asked by sanjay on November 11, 2015 
maths
If E the universal set contains all rectangles of length x and breadth y, where x and y are integers and x>y. A contains rectangles with area of 24m2 B contains rectangles , each with length multiples of 3 and area of 24m2. Find n(A), n(B), and n(A ^B)
asked by Fatima on July 8, 2011 
math
When Hugo was 9 years old he was 56 inches tall. Hugo is now 12 years old and he is 62 inches tall. Find the percent of increase in Hugo’s height to the nearest tenth.
asked by maggie on January 31, 2014 
Maths
A two digits number is such that four times the unit digit is five times greater than the tens digit. When the digits are reversed, the number is increased by nine. Find the number?
asked by Anonymous on September 11, 2018 
3rd grade math
suppose there are 2 pieces of the cake left over but you don't know how many pieces there were in the whole cake. explain how you could find the number of pieces in the whole cake if taylor told you that 1/5 of the cake was left.
asked by mandie on March 28, 2014 
Math
Find the measures of two supplementary angles if the difference of their measures is 56 degrees I know supplementary angles are the sum of the measure if two angles is 180 degrees but then what is the question asking?
asked by Dani on November 16, 2010 
Maths
Solve the following system of linear equations by addition. Indicate whether the given system of linear equations is consistent, inconsistent, or dependent. If the system is consistent, find the solution. {−7x + 7y −9x + 9y == −21 −27
asked by Leticia on July 12, 2016 
Math
Play tickets cost $24 for two adults and two children. A child's ticket costs half as much as an adults ticket. Find cost of child's ticket
asked by Mary on November 7, 2015 
math
a man from point A 80 m with beariNBC N 60 degree E walked toward the point of destination C, while another man from point B walked 60m with bearing S 30 degree E also toward C. find the distance between A and B
asked by reggy on September 14, 2015 
calculus
A plane flies 810 miles from A to B with a bearing of 75 degrees. Then it flies 648 miles from B to C with a bearing of 32 degrees. Find the straightline distance from and bearing from C to A.
asked by ASH on May 15, 2012 
math
A sum of money is shared among three brothers. The eldest receives 7/13 of it and the 13 next receives 2/3 of the remainder. If the youngest brother receives $6, find the sum of money shared.
asked by Waqas on September 4, 2016 
algebra 34
a 3 mile cab ride cost $7.00. A 7 mile cab ride cost $11.50. Find a linear equation that models cost c as a function of distance d.
asked by vanessa on August 31, 2011 
math
The total toll charge for 1 car and 5 bicycles to cross a bridge is $7.50. The toll for a car is $1.50 more than for a bicycle. Find the cost for a car to cross the bridge.
asked by Jason on July 2, 2009 
Math 5th grade
Find a two mixed numbers such that when you estimate their sum by rounding to the nearest whole number you get a different estimate than when you round to the nearest half. Not sure about rounding to the nearest half???
asked by Ms. H on September 20, 2017 
Calculus
Find the derivatives of the following 18. y=〖cos〗^4 x^4 ANSWER: tanx2 19. y= sinx/(1+ 〖cos〗^2 x) ANSWER: 3sinx 20. y=sinx(sinx+cosx) ANSWER: sinx Can you check my answers?
asked by StevE on November 6, 2014 
algebra & trigonometry
Jerry wants to purchase some items whose cost function is , where x is the number of items. If Jerry spends between $50 and $80, find the minimum and maximum number of items that he can purchase. Thanks
asked by daniel on February 9, 2014 
Physics
A force of 3.00 N acts through a distance of 12m in the direction of the force.Find the work done. Work=force*distance*CosTheta where theta is the angle between force and distance.
asked by fluffy on September 16, 2006 
goemetry
A segment is divided into two parts having lengths in the ratio of 5:3. If the difference between the length of the parts is 6," find the length of each part. x = ? segment 1 = (5x) = ? inches segment 2 = (3x) = ? inches
asked by terri on March 9, 2011 
Physics
The mass of a certain planet is six times the mass of the earth and the diameter of the planet is twice the diameter of the earth. Find the acceleration od gravity on the surface of this planet. HELP ME SOLVE! THANKS!
asked by Shane on October 15, 2009 
Calculus
Use linear approximation, i.e. the tangent line, to approximate (1/0.504) as follows: Find the equation of the tangent line to f(x)=1/x at a "nice" point near 0.504. Then use this to approximate (1/0.504).
asked by Joe on April 3, 2012 
Geometry question
In isosceles ABC, B is the vertex. The measure of angle B can be represented as (8x+2). The measure of angle A can be represented as (9x2). Find the measure of all three angles of the triangle. Be sure to name the angle with it’s measurement (ex: angle
asked by Jim on August 23, 2007 
Math
A NUMBER ROUNDS OFF TO 4000.THE DIGIT IN THE HUNDREDS PLACE IS TWICE THE DIGIT IN THE TENS PLACE.THE SUM OF DIGITS IS 12.THE NUMBER USES ONLY TWO DIFFERENT DIGITS.FIND THE NUMBER.
asked by Winilyn on June 25, 2018 
Problem Solving and Geometry
When Marcie stands 5 feet from a light post, her shadow is 6 feet long. Find the height of the light post if Marcie is 4 feet tall.
asked by Anonymous on June 24, 2011 
Math
An isosceles triangle and a rectangle share a base. The area of the rectangle is 4 times the area of the triangle. The area of the triangle is 60 cm^2 and its height is 15 cm. Find the dimensions of the triangle.
asked by Mary on February 11, 2011 
science
The greatest and least resultant of two forces acting at a point is 29 kgwt and 5 kgwt respectively.If each force is increased by 3 kgwt.Find the resultant of the two new forces when acting at right angles to each other?
asked by Ankit on April 29, 2017
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