1. algebra,

    x=5x+6y change subject to x
  2. Chemistry

    How do you change 15% to moles
  3. Math

    1/2x - 1/4y= 7/2 3/4x + 1/3y= 19/2 To change into y=, do i also multiply by 1/2 and -1/2?
  4. Math

    How do you change 97% into a fraction?
  5. math

    Okay 5/9 + 7/9 I know you change the denominator so 5/6 = 15/18 or 3/18 7/9 = 14/18 or 2/18 which one?
  6. Geology

    rate of change
  7. science

    what is a chemical change?
  8. English

    How might a character change in the course of a novel?
  9. chemistry

    how to change mg/mL into mmol/L?
  10. math

    change 34.55% to a decimal.
  11. change decimal to fraction

    How do I change a decimal that looks like this 0.31 1/4 into a fraction?
  12. physics

    The figure shows an overhead view of a uniform 2.00-kg plastic rod of length 1.20 m on a very slick table. One end of the rod is attached to the table, and the rod is free to pivot about this point without friction. A disk of mass 36.0 g slides without
  13. SCIENCE,PHYSICS

    A thin ring with resistance R=10 Ω and self inductance L=0.2 H rotates with constant angular speed ω=100 rad/s in an external uniform magnetic field perpendicular to the rotation axis. As a result, the magnetic flux created by the external field
  14. math

    juile is making a nacklace out of red, green, and white beads. she strings the beads in order shown above and and continues the pattern. each bead is 1/4 inch in diameter. how many beads of each color will she need to make a necklace 24 inches long?
  15. Chemistry

    Sally Scientist is trying to determine Avogadro's number using a procedure analogous to that in Experiment 4. She fills a watchglass with diameter 11.9 cm with water and is trying to create a monolayer of stearic acid on the top of the water. What is the
  16. Physics

    Starting from rest, a 2500 kg helicopter accelerates straight up at a constant 1.7 m/s2. What is the helicopter's height at the moment its blades are providing an upward force of 29 kN? The helicopter can be modeled as a 2.6-m-diameter sphere. How do you
  17. Chemistry

    Based on the following observations for 3 unidentified metals (Z, X, and D) and solutions of their metal cations (Zn+ and En+), rank the metals in terms of reducing agent strength, from lowest to highest. -When metal X is placed in an aqueous solution of
  18. Physics

    As your vacation job, you are driving a concrete mixer (mass 3300 kg). While driving down a hill (angle α = 29° with the horizontal), suddenly, a cow steps out on the road. You hit on the brakes, and with each locked wheel leaving 24 meters of skid
  19. solid mensuration

    Find the area of a cyclic quadrilateral whose 2 sides measure 4 & 5 units, & whose diagonal coincides with a diameter of the circle. Suppose the radius of the circumscribing circle is 2 sq.root of 3 units. Please include solution. Thanks.
  20. Physics Help!!

    A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.
  21. Biology

    Why is the diameter of the afferent arteriole to the glomerulus larger than the efferent ateriole? Explain one example of a homeostatic mechanism in the body. Explain why the control of carbon-dioxide in the blood is a negative feed back mechanism.
  22. Physics

    A Silver bowl has a mass of 1.78kg. It is shaped like a cylinder and has a diameter of 35.0 cm and a height of 8.00cm. It is placed in water. Find (a)the volume of water it displaces, (b) The buoyant force exerted on it by the water, and(c)how deeply it
  23. college algebra

    A circular vent pipe with a diameter of 5.5 inches is place on a roof that has a slope of 1/4. Find an equation of the ellipse that should be cut from the roof so that the pipe will fit. roound parameters to the nearest hundreth.
  24. College Physics

    If one micrometeorite (a sphere with a diameter of 1.8 10-6 m) struck each square meter of the Moon each second, estimate the number of years it would take to cover the Moon with micrometeorites to a depth of one meter? Find how long it would take to fill
  25. College Algebra

    A circular vent pipe with a diameter of 5.5 inches is place on a roof that has a slope of 1/4. Find an equation of the ellipse that should be cut from the roof so that the pipe will fit. roound parameters to the nearest hundreth.
  26. physics

    A motorcycle daredevil wants to ride up a 50.0 m (50.0 m long, not 50.0 m high) ramp set at a 30.0° incline to the ground. It will launch him in the air and he wants to come down so he just misses the last of a number of 1.00 m diameter barrels. If the
  27. Phyiscs

    A hollow copper tube (diameter = 4.01 cm) is sealed at one end and loaded with lead shot to give a total mass of 0.218 kg. When the tube is floated in pure water, what is the depth, z, of its bottom end?
  28. math

    A rectangular tank measure 4m by 2.5m by 10m. If the empty tank is to be filled in 10mins by a cylindrical pipe through which water is forced at a rate of 1 metre per second, find to 3 significant figures the diameter of the pipe in centimetres.
  29. math

    a closed tin is in the shape of acylinder of diameter 10cm and height 15cm.use the value 3.14 for pie to find a)the total surface area of the tin b)the value of the tin to the nearest naira if tin plate cost 450 per m2
  30. physics

    A 4.4 diameter merry-go-round is rotating freely with an angular velocity of 0.63 . Its total moment of inertia is 1800 . Four people standing on the ground, each of mass 66 , suddenly step onto the edge of the merry-go-round.
  31. math (word problem)

    Suppose a car tire has a diameter of 26 inches. How many rotations will thee tire make if the car travels 1 mile? Round to the nearest tenth. If you get answer please show work of how to get there. Thanks!
  32. physics ( help)

    The active element of a certain laser is made of a glass rod 30cm long and 1.5cm in diameter. The average coefficient of linear expansion of glass is 9 x 10^-6°C-1. If the temperature of the rod increases by 65°C, what is the increase in its volume?
  33. math

    an agriculture field is rectangular, with dimensions 100m by 42m.a 20 m deep well of diameter 14 m is dug in a corner of the field and the earth taken out is spread evenly over the remaining part of the field.find the increase in the level of the field
  34. Fluid

    A research submarine is designed to operate 3 km below the ocean surface. If then interior pressure is 1 atm, what is the total pressure on a 15cm diameter window and force on window. The average density of seawater is 1028 kg/m3
  35. PHYSICS ---HELP!

    A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.
  36. Chemistry

    A student measures the initial temperature of an object as 28.33oC and the final temperature as 62.35 oC. What is the change in temperature in units of Kelvin? An unknown metal is found to have a specific heat capactiy of 0.235. From this, calculate its
  37. ENGLISH

    Which sounds better? "If I WAS to do this experiment again, I would change the regular (plain) water to salt water." OR "If I WERE to do this experiment again, I would change the regular (plain) water to salt water."
  38. math (rate)

    A blue candle is twice as long as a red candle. The blue candle takes 6 hours to burn out, and the red candle takes 15. After 5 hours, what fractional part of each candle is left? The blue candle's length is what fraction of the red candle's length?
  39. math

    tiangle pqr is an equilateral triangle in a circle. the height of the triangle is 18 cm. the diameter of the circle is 24 cm. find the perimeter of the triangle. can you help me solve this question?
  40. physics

    A hollow cylinder and a solid cylinder have the same diameter. Determine which has the greater moment of inertia with respect to an axis of rotation along the axis of the cylinder.
  41. Physics

    A battery is used in an experiment and is connected by a 37.5 cm long gold wire with a diameter of 0.590 mm. If the battery has a voltage of 1.70 V and the resistivity of the wire is 2.4×10-8 Ω m, what is the current in the wire?
  42. Geometry

    A machine for baling hay produces cylindrical bales that are 5 feet in diameter and 4 1/3 feet in height. how many cubic feet are in each bale of hay?
  43. ocean view

    a bicycle tire rim has a diameter of24.5 inches, and the tire is 2.25 inches thick. find the circumference ofthe outside of the tire.
  44. math

    a sand pile in a shape of an upside-down cone has a volume of 350 m2 . The diameter of the base pof the pile is 7m. what is the height of the sand pile?
  45. math

    a sand pile in a shape of an upside-down cone has a volume of 350 m2 . The diameter of the base pof the pile is 7m. what is the height of the sand pile?
  46. math

    An open cylindrical tank has an internal diameter of 5.6 cm and an internal height of 4 cm. The inside of the tank was painted. What area of the tank, in square centimeters
  47. math

    a sand pile in a shape of an upside-down cone has a volume of 350 m2 . The diameter of the base pof the pile is 7m. what is the height of the sand pile?
  48. Physics

    A 30m high cylindrical water tank has a diameter of 14m. The tank is two-thirds full of water. What is the pressure at the bottom of the tank?
  49. Math

    A painting shaped like a circle had a diameter of 20 inches. A circular frame extends 2 inches around the edge of the painting. How much wall space does the framed painting need? Use 3.24 for pi.
  50. math

    an inner tube for a bicycle has a diameter of 2 inches and measures about 82 inches along its circumference. What formula would you use to determine the numbers of cubic inches of air the inner tube can hold
  51. physics

    a wire of lengh 2meter has a resistance of 4 ohms,obrain the resistance if specific resistance is doubled,diameter is doubled and the length is made three times of the first.
  52. GED-Word Problems

    Roland drives a mixer for a cement company. The mixer is a cylinder 10 feet long with a diameter of 9.5 feet. What is the volume of the mixer?
  53. Math

    A triangle with a Base of 8 inches and a height of 7 inches has a circular section of diameter 3 inches removed from its center. What is the remaining area of the triangle? (Use π = 3.14)
  54. math

    a. half circle with a radius of 20 cm b. half circle with a diameter of 3 ft find the perimeter of each of the half circles. i thought the answers were 12.42 ft for b and 165.6 cm for a, but i was told that i was wrong
  55. Math

    The diameters of bolts produced by a certain machine are normally distributed with a mean of 0.25 inches and a standard deviation of 0.01 inches. What percentage of bolts will have a diameter greater than 0.24 inches? A. 79.13% B. 82.46% C. 84.13% D.
  56. Math

    An inner tube for a bicycle has a diameter of 2 inches and measures about 82 inches along its circumference. What formula would you use to determine the numbers of cubic inches of air the inner tube can hold
  57. Math

    An inner tube for a bicycle has a diameter of 2 inches and measures about 82 inches along its circumference. What formula would you use to determine the numbers of cubic inches of air the inner tube can hold
  58. Math

    the diameter of a car tire is 52cm. While the car is being driven the tier picks up a nail how high above the ground will the nail be after the car has traveled 0.1km
  59. Physic

    A 1/2 inch diameter piston moves 10 inches when 30 Lbs of force is applied how far will it move a 6 inch diamter piston and how much weight will this piston lift.
  60. Surface areas and volumes

    The inner diameter of a circular well is 3.5m .It is 10m deep (a) find the inner curved surface area (b)the cost of plastering the curved surface at the rate of 40/-per m^2
  61. Physic

    A1/2 inch diameter piston moves 10 inches when 30 Lbs of force is applied, how far will it move a 6 inch Diamter piston, and how much weight will this piston lift?
  62. Physics E&M

    A 68.0 g hollow copper cylinder is 90.0 cm long and has an inner diameter of 1.0 cm. The current density along the length of the cylinder is 1.60×10^5(A/m^2). What is the current in the cylinder? Ive tried many ways but am not getting the correct answer.
  63. maths

    A hollow cylinder open at both ends is made of steel 2 cm thick. What will be the volume of steel used in making the cylinder, if the external diameter is 24 cm and the length of the cylinder is 55 cm.
  64. math - please help

    The 7 inch diameter drive drum of a belt conveyor is turning at 130 rpm. What is the belt speed (ft/min) if there is no slip between the belt and drum?
  65. Math

    Andelko measured the largest chord on his slice of pizza, and found it was 20 cm long. from the midpoint of the chord to the outside of the pizza, the shortest distance was 2 cm. what was the diameter of the pizza?
  66. geometry

    Andelko measured the largest chord on his slice of pizza, and found it was 20 cm long. From the midpoint of the chord to the outside of the pizza, the shortest distance was 2 cm. What was the diameter of the pizza?
  67. Math

    A triangle with a Base of 8 inches and a height of 7 inches has a circular section of diameter 3 inches removed from its center. What is the remaining area of the triangle? (Use π = 3.14)
  68. OPTICS

    PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?
  69. Physics

    If you look at yourself in a shiny Christmas tree ball with a diameter of 9.0 cm when your face is 38.0 cm away from it, where is your image? (Your answer should be positive if the image is in front of the ball's surface, and negative if the image is
  70. chemistry

    An indicator has the reaction Hln(aq) ¡ê H+(aq) + In-(aq). Explain how the indicator can change color when a strong base is poured into a solution of this indicator. Will a strong base dissociate? Which way will this cause the reaction to shift? Is there
  71. AP Chemisty

    N2(g)+3F2 yields 2Nf3(g) Delta H(degree)298=-264KJ mol-1;Delta S(degree)298=-278J K-1 mol-1 The following questions relate to the synthesis reaction represented by the chemical equation above. a.)CAlculate the value of the standard free energy change,
  72. Environmental Problems

    Where in the US and Canada is deforestation, air pollution, water pollution, and climate change happening? San Francisco Aereas near all population centers would be the most acute, as you get further North the polution is less and, the deforestation is
  73. Physics

    A toy gun uses a spring to shoot a ball with a mass of 5.0 g. The spring is “loaded” by compressing it 5.0 cm and has a spring constant of 288 N/m. The end of the spring is at the end of the gun (the ball does not travel any distance inside the gun
  74. GEOMETRY

    The diameter of a circle has endpoints P(–10, –2) and Q(4, 6). a.Find the center of the circle. b.Find the radius. If your answer is not an integer, express it in radical form. c.Write an equation for the circle.
  75. Algebra 1 Honors

    The volume of a cylinder is 157 cubic inches. The base of the cylinder has a diameter of 5 inches. What is the height of the cylinder? Round to the nearest tenth of an inch.
  76. Physics

    A car travels around a circular track (4 km diameter). Its tires have frictional coefficients: mS = 0.3 & mK = 0.2. If the track is flat, how fast can the car travel around the track and still maintain control?
  77. physics

    A typical red blood cell has a mass of 3.0 10-16 kg. A blood sample placed in a centrifuge is subjected to a force of 4.6 10-11 N when the centrifuge is operated at 138 rev/s. What is the diameter of the centrifuge?
  78. maths/physics

    PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?
  79. math

    A cue shaped box fits exactly around a soccerball with a diameter of 22.28 cm. What percent of the box is empty space? Help understand how to get to the answer, and wat it would be Cube shaped box*
  80. maths/physics

    PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?
  81. Elementary Statistics

    The diameters of pencils produced by a certain machine are normally distributed with a mean of 0.39 inches and a standard deviation of 0.04 inches. If 500 pencils are selected how many would you expect to have a diameter more than 0.33 inches?
  82. geomtry

    A diameter of a circle has endpoints P(-10,2) and Q(4,6) a. find the center of the circle. b. find the radius of your answer is not an interger express in radical form c. write an equation for the circle
  83. english

    the stems measure a foot in diameter=transitive people use bamboo in many ways=transitive in japan the hollow stems serve as water pipes= transitive
  84. Calculus(PLZ HELP)

    A serving bowl has an inside diameter of 12 inches and a depth of 4 inches. The bowl is fashioned from part of a sphere. Find the capacity (volume) of the bowl.
  85. Physics

    With the engines off, a spaceship is coasting at avelocity of +260m/s through outer space. The ship carries rockets that are mounted in firing tubes, the back ends of which are closed. It fires a rocket straight ahead at an enemy vessel. The mass of the
  86. college physics

    A Loop wire has a diameter of 1.00 cm. It carries a current which generates a magnetic field of 3.00 MT at the center of the loop. What is the current in the loop?
  87. math

    The head of a round piston has a pressure of 210 psi pushing down on it. The piston is 3 inches in diameter. What is the force pushing the piston down?
  88. math question

    A pool company will install a round swimming pool in the middle of a yard that measures 40 ft. by 20 ft. If the pool is 12 ft. in diameter, how much of the yard will still be available?: *
  89. math

    two circles intersect at point T.if the small circle has a raduis of 4 and C is the center of the larger circle,then the diameter of the larger circle must be 1]4 2] 8 3] 12 4]16 5] not enough information is given
  90. Math

    A cotton reel has a diameter of 3cm. 91 metres of cotton goes around it. How many times does the cotton go around the reel? And give your answer to the nearest ten
  91. physics

    A eye pupil of 1 cm diameter can resolve about what angle in radians? First of all I don't understand what they mean by resolve. Resolve the light coming into the eye?
  92. math

    find the weight of lead pipe 3.5 m long the ext . diameter of the pipe is 2.4 cm and thickness of the pipe is 2 mm given 1 cm of lead weighs 10g
  93. Physics

    Two 18.0 cm diameter charged rings face each other, 22.0 cm apart. The left ring is charged to + 40.0 nC and the right ring is charged to + 15.0 nC. What is the force on a + 0.50 nC charge placed at the mid point?
  94. History of America

    How did America’s Involvement change after the fall of France and the air war against Britain? Congress declared war on Germany There was no formal change of policy American advisors trained the resistance The President admitted “disappointment” 19.
  95. Its not English, but its GENERAL STUDIES

    Write half page for each topic. What do you feel about? or something you wish to know or learned ? in college about? 1. Test preperation. 2. Faculty expectaton. I am uncertain what you want here. We will be happy to critique your writing. What do you feel
  96. INTRO TO PHYSICS

    Each of the following objects has a radius of 0.174 m and a mass of 2.16 kg, and each rotates about an axis through its center (as in the table below) with an angular speed of 37.3 rad/s. Find the magnitude of the angular momentum of each object. >Hoop
  97. physics

    A disk rotates about its central axis starting from rest and accelerates with constant angular acceleration. At one time it is rotating at 7.8 rad/s; 60 radians later, its angular speed is 19 rad/s. Calculate (a) the angular acceleration (rad/s2), (b) the
  98. Art History

    A. Pyramid B.Propaganda C.Babylonians D.Cuneiform E.Gudea of Lagash F.Ziggurat G.Amorites H. Clay I.The Sumerians J.Mesopotamia 1. Ancient region of Southwest Asia between the Tigris and Euphrates rivers. 2. They invented the wheel 3. Sumerian writing
  99. (2-8) Chemistry - Science (Dr. Bob222)

    Which of the following statements is correct? A) The internal energy of a system increases when more work is done by the system than the heat that flows into the system. B) The system does work on the surroundings when an ideal gas expands against a
  100. Chemistry!

    Calculate the work involved if a reaction with an enthalpy change of -2418 kJ is carried out in a vessel with a mobile, frictionless piston. Other details: the reaction is H2(g) + 1/2Oxygen2(g) yields H2O(g) with enthalpy change of -241.8 kJ/mol. The