Questions Asked on
April 29, 2017

  1. physics help

    You drive down the road at 39 m/s (88 mi/h) in a car whose tires have a radius of 34 cm. What is the period of rotation of the tires?2sf value/units Through what angle does a tire rotate in one second?2sf value/ units

    asked by anonymous
  2. Math

    On centimeter dot grid draw all possible rectangles with a perimeter of 16 cm and sides whose lengths are whole centimeters

    asked by Nooreen
  3. Math

    A number cube is rolled 360 times, and the results are recorded as follows: 61 ones, 26 twos, 36 threes, 76 fours, 73 fives, and 88 sixes. What is the experimental probability of rolling a 2 or a 3? A. 0.07 B. 0.17 C. 0.26 D. 0.83

    asked by \_(^_^)_/
  4. Geometry

    Given: ABCD is a trapezoid, AB = CD, BK ⊥ AD (they are perpendicular , AK = 10, KD = 20 Find: BC AD I got that BC is 15 and AD is 35 so I got BC/AD=15/35 is this answer right? and is so can you add the answer and an explanation

    asked by Allie
  5. geography

    Explain the effects of the poor service delivery. There must evidence that i actually investigate the poor service delivery physically where possible. Explanation must be with regard to social or Economic or Environmental problem

    asked by Angel
  6. Math

    Point Q belongs to side AB of square ABCD. The distances from point Q to the diagonals of the square are 2 ft and 3 ft. Find the diagonal of the square.

    asked by Allie
  7. physics help

    Some dragonflies splash down onto the surface of a lake to clean themselves. After this dunking, the dragonflies gain altitude, and then spin rapidly at about 1100 rpm to spray the water off their bodies. When the dragonflies do this "spin-dry," they tuck

    asked by anonymous
  8. math

    the area of a regular hexagon is given as 384√3 a. how long is each side of a hexagon b. find the radius of a hexagon c. find the apothem of a hexagon

    asked by darik
  9. Science please help

    12. Measure the temperature of two unknown samples with your thermometer 13. Record both temperatures using the scale on the straw. please help ive been stuck for about 1 hour and a half

    asked by banna
  10. Maths, physics, chemistry,

    The weight of H2C2O4.2H2O required to prepare 500 ml of 0.2N solution is a)126g b)12.6g c)63g d)6.3g

    asked by Deepak
  11. math

    A certain disease has an incidence rate of 0.8%. If the false negative rate is 7% and the false positive rate is 3%, compute the probability that a person who tests positive actually has the disease. Show all work.

    asked by un
  12. Language connections academy

    Has anyone read walk two moons by Sharon Creech?

    asked by Katie Brown
  13. science

    Of the following, which is NOT an adaptation made by reptiles to life on land? thick, dry, water-proof skin exchange oxygen and carbon dioxide in lungs only eggs with leathery shells open circulatory system I think its either C or B

    asked by SwimmerGirl
  14. Social Studies

    which of the following is the best description of a reason the Soviet Union collapsed ? A) Development of the Strategic Defense Initiative * B) The stars wars defense system was successful C) Gorbachev allowed political parties other than his own D) A

    asked by Help Ms Sue
  15. Chemistry

    A possible set of quantum numbers for the last electron added to complete an atom of potassium in its ground state is a) n=4, l=0, ml=0, ms= -1/2 b) n=3, l=1, ml=0, ms= -1/2 c) n=4, l=1, ml=0, ms= +1/2 d) n=3, l=1, ml=1, ms= +1/2 e) n=4, l=2, ml=1, ms=

    asked by Anon
  16. Calculus

    find the volume of the solid formed by revolving the region bounded by the graphs of y=x^3 y=1 x=2 about the y-axis

    asked by Ke$ha
  17. math

    sin130.tan60 ÷cos540.tan230.sin400

    asked by reduction formula trigonometry
  18. Grade 12 Advanced Functions

    The length of a child's square-based jewelry box is 5cm more than its height. The box has a capacity of 500cm^3. Solve a polynomial equation to determine the dimensions of the box.

    asked by Zara
  19. geometry

    The side of one square is equal to 1m, and its diagonal is equal to the side of a second square. Find the diagonal of the second square.

    asked by Anonymous
  20. math

    Determine the quadrant in which the terminal side of the given angle lies. 230°

    asked by J.B.
  21. Calc

    Find a Cartesian equation for the curve and identify it. r=5cscx

    asked by Anonymous
  22. Math

    This 3 demensional shape has 7 faces that are rectangles as well as two bases that are polygons. What is this shape ?

    asked by Bob
  23. Pre

    How many different license plate number can be made using 2 letters followed by 4 digits selected from the digits 0-9 a) if letters and digits may be repeated? b) if letters may be repeated, but digits may not be repeated? c) if neither letters nor digits

    asked by Kelley
  24. 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
  25. Math fp1

    The roots of the quadratic equation z^2+(4+i+qi)z+20=0 are w and w* I) in the case where q is real, explain why q must be -1

    asked by Stephan
  26. Maths

    A circular pond of radius 4m has a path of width round it. Find the area of the path

    asked by value
  27. Calculus

    Find the distance traveled by a particle with position (x, y) as t varies in the given time interval. x = cos^2 t, y = cos t, 0 ≤ t ≤ 9π and the length of the curve so far i got ∫0 to 9pi √((-2cos(t)sin(t))^2+(-sint)^2) I am having trouble

    asked by rob
  28. math

    The perimeter of the base of the regular quadrilateral pyramid is P = 30 cm. Find the sum of all edges of this pyramid, if the perimeter of a lateral face is 27.5 cm

    asked by guy
  29. Physics

    a ballon carrying a ball is moving vertically upward with velocity 12 m/sec. when the ballon is at height 65m the ball is dropped,with what speed ball hit the ground?

    asked by Piyush
  30. Math

    An aeroplane starts from P and flies due west on the same latitude covering a distance of 1232KM to point T. Calculate the difference in angles between P and T

    asked by Yas
  31. math

    Circle the prime numbers in the following set of numbers. Show your work. 953, 1,427, 2,971 I can tell whether each number is prime but I am having a hard time with individual numbers

    asked by Matthew
  32. math

    Find the speed of a point on the rim of a 24cm diameter fly wheel which is turning at 2800 revolutions per minute. Give your answer in meters per second.

    asked by Sporsho
  33. physic

    A small fly wheel fitted to a motor with a moment of inertia of 80 kg m² slows down from 9000 rpm to 5500 rpm in 7.5 seconds. For the fly wheel, calculate: • The rate of deceleration which you can assume to be constant • The braking torque.

    asked by john
  34. math

    The perimeter of the base of the regular quadrilateral pyramid is P = 30 cm. Find the sum of all edges of this pyramid, if the perimeter of a lateral face is 27.5 cm

    asked by Anonymous
  35. Math

    Ten students took a math exam. As the teacher evaluated the math exams, she noticed that 8 of the ten students scored above the median. Is this possible? Why I am leaning towards yes it is possible. Kinda confused

    asked by Miles
  36. Chemistry

    What is the molarity of a solution containing 1.23g of LiOH in enough water to give a final volume of 380ml? I know the MW of Li is 6.941, O is 15.9594 and H is 1.00794. Using this info the number of mols in 1.23g of LiOH is 0.05144

    asked by Raelene
  37. Chemistry

    Calculate the ph of a solution that is 0.2M In NH3 and 0.3M in NH4Cl we find that the acid dissociation constant ka for NH3 is 5.7×10^-10

    asked by Lana
  38. math

    If there are 10 red marbles and 30 blue, what is the probability of randomly selecting a blue marble?

    asked by iggy
  39. Math

    there are 680 coins divided into 3 piles. The second pile has three times as many coins as the first. The third pile has 50 more coins than the second pile. Solve This problem using a tape diagram.

    asked by Melissa
  40. Math

    This 3-dimensional shape has 6 faces that are triangles as well as one base that is a polygon. What is this shape?

    asked by Melissa
  41. Math - combinatorics/ permutations

    There are nine differently-titled books on a shelf. Four books have red covers, while the other five have black covers. How many different arrangements of the books can there be, if (a) there are no restrictions on the order in which the books are placed?

    asked by Rob
  42. L.A.

    Which sentence is punctuated correctly? A. One of only two in existence today, this manuscript rarely leaves the museum's vault. B. One of only two in existence today this manuscript rarely leaves, the museum's vault. C. One, of only two in existence

    asked by ?
  43. Chemistry

    Three bottles lost their labels. One contained an aqueous solution of HCl, another an aqueous solution of HNO3, and the third contained an aqueous solution of H2SO4. Write an experimental procedure that would allow you to correctly identify the contents of

    asked by Anonymous
  44. Math

    Hello, What are the different formulas for circles (radius, circumfrence, diameter, area)? Thank you

    asked by Alexa
  45. thermodynamic

    If the energy used to heat up a block of 2kg of copper is 115.8 kJ, what is the temperature it was heated to if the starting temperature was 100oC and the specific heat capacity is 386 J/kgK. please help. thanks

    asked by jaz
  46. Advanced Functions grade 12

    f(x)= a(x+4)(x+1)(x-2) Find a

    asked by Zara
  47. Chemistry

    Do all salts conduct electricity in water? Why or why not?

    asked by Michael1
  48. Math

    Megan read an average (mean) of 2 books a day for 4 days. How many books will Megan need to read on days five and six so that she can say that she read an average of 3 books a day over 6 days?

    asked by tammy
  49. Math

    Ten students took a math exam. As the teacher evaluated the math exams, she noticed that 8 of the ten students scored above the mean. Is this possible?

    asked by Miles
  50. social studies

    5 causes of contemporary problems

    asked by somto
  51. Statistics

    Can 2 X 2 between-subject ANOVA be used if participants were from the same class and all completed the same survey? For example, say the two conditions were athletic status(athlete vs non-athlete) and parent status (parent or not a parent) and all

    asked by 2-way ANOVA
  52. Calculus

    Determine the remainder for Sn where n=5 or n=9 for the following series. ∑n=1 to ∞ (n^2+1)/(n^4) S5= R5= S9= R9=

    asked by Janna
  53. electrical

    how to calculate the size of cable for 40kw motor

    asked by uluubi
  54. Advanced Functions

    Solve the polynomial inequality algebraically. x^2-2x-8 ≤ 0

    asked by Zara
  55. Chemistry

    Three bottles lost their labels. One contained an aqueous solution of HCl, another an aqueous solution of HNO3, and the third contained an aqueous solution of H2SO4. Write an experimental procedure that would allow you to correctly identify the contents of

    asked by Anonymous
  56. business

    Why do states require centers to be licensed?

    asked by Anonymous
  57. Maths

    A single ordered data set includes the following data. 2, 4, 5, 6, 8, 10, x. What is the largest possible value of x if it is not an outlier?

    asked by todd
  58. chemistry

    How do you know if a compound is predicted to be polar or non-polar? Especially if they use imaginary elements as examples?

    asked by I need some help please
  59. Math

    How you can quickly calculate the mean of the following test scores without adding the numbers. 76,73,78,75

    asked by Tammy
  60. English

    I wrote two thesis statements, which one is good. Which one should I use for my essay. 1) Over the recent years, the use of illicit drugs has increased to some extent with the rise of drug legalization campaigns, though, with reformation and implantation

    asked by Daniel
  61. uni of huddersfield

    An electron (m = 9 x 10-31 kg) leaves the cathode of a radio tube with zero initial velocity and travels in a straight line to the anode, which is 1 cm away. It reaches the anode with a velocity of 6 x 106 m s-1 i)calculate the acceleration and the force ?

    asked by Rohit