wood

1,443 results
  1. physics

    The coefficient of kinetic friction for wood on wood is o.55. The coefficient of kinetic friction for wood on wood is 0.68. For a 3.5kg wood block being pulled horizontally: a. what is the pull force needed to start the wood block moving on a wood floor?
  2. Math

    Thomas needs to cut a piece of wood for a model airplane he is builing. He has four peices of wood: 5 ft, 4 ft, 6 ft, 3 ft long. If the length of wood he needs to cut √11 ft long, which peice of wood should be cut to have the least amount of unused wood.
  3. fun

    how much wood could a wood chuck chuck if a wood chuck could chuck wood?:) Thank you for using the Jiskha Homework Help forum. A woodchuck is a groundhog. The word itself is of Algonquian origin for this marmot. Since "chuck" means "discard" I doubt a
  4. English

    1. He is try to hit a piece of wood with an axe to cut it. (Is this correct?) 2. a piece of wood, two pieces of wood (Do we use these expressions? What about a wood, or two woods?)
  5. physics

    an archer shoots an arrow into a piece of wood. the arrow is traveling at 120km/h when it strikes the wood. the arrow penetrates 3.8cm into the wood before stopping. what is its average acceleration (in m/s squared) into the wood?
  6. Physics

    An archer shoots an arrow into a piece of wood. The arrow is traveling at 120 km/h when it strikes the wood. The arrow penetrates 3.8 cm into the wood before stopping. What is its average acceleration (in m/s2) into the wood?
  7. Physics

    an anchor shoots an arrow into a piece of wood. the arrow is traveling at 120 km/h when it strikes the wood. the arrow penetrates 3.8 cm into the wood before stopping. what is the average acceleration (in m/s^2) into the wood?
  8. physics

    Ten bags of top soil, each weighing 180 N, are placed on a 2.90-m long sheet of wood. They are stacked 0.50 m from one end of the sheet of wood, as shown below. Two people lift the sheet of wood, one at each end. Ignore the weight of the wood, how much
  9. physics

    Ten bags of top soil, each weighing 150 N, are placed on a L = 2.95 m long sheet of wood. They are stacked 0.50 m from one end of the sheet of wood, as shown in Figure 8-27. Two people lift the sheet of wood, one at each end. Ignore the weight of the wood,
  10. physics

    Q.a cube of wood 20cm on each side,floats in water so that 30% is above the surface of the water,and 70% is below.what is the density of the wood(justify the answer) i.what mass of lead mass has to be placed on the top of the block of wood,so that it wi;;
  11. physics

    Q.A cube of wood 20cm on each side,floats in water so that 30% is above the surface of the water,and 70% is below. i.what is the density of the wood(justify the answer) ii.what mass of lead mass has to be placed on the top of the block of wood,so that it
  12. Math

    Sara bought 2 boards of wood one board is 18 inches the other is 30 inches she wants to cut the wood into longest equal parts with no wood left over does Sara have enough wood for 10 equal size peices
  13. math

    Tomas needs to cut a piece of wood for a model airplane he is building. He has four pieces of wood: 5 feet, 4 feet, 6 feet, and 3 feet long. If the length of wood he needs to cut is 11 square root feet long, which piece of wood should he cut to have the
  14. Physics

    A piece of wood with mass m = 2.7 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 460 N on the wood. If the coefficient of static friction between the wood
  15. physics

    A piece of wood with mass m = 2.8 kg is held in a vise sandwiched between two wooden jaws as shown in the figure below. A blow from a hammer drives a nail which exerts a force of 440 N on the wood. If the coefficient of static friction between the wood
  16. maths

    jerry bought a piece of wood 5m long. he used 3/8 of the wood for a frame. and 1/5 to fix a door. he used the remainder of the wood on a kitchen cupboard. what fraction did he use on the cupboard
  17. Physics 30

    A 6.8 g bullet travelling at 395m/s goes through a stationary block of wood in 4.3 *10^-4 and emerges at 102 m/s. what average force did the wood exert on the bullet ? how thick is the wood?
  18. maths

    The inner dimensions of wooden box are 2m, 1.2m, 0.75m. the thickness of wood is 2.5cm.find the cost of wood if the cost of wood of 1cubic metre is rs.5400
  19. chemistry

    the density of a piece of wood is 0.638 g/cm3. The dimensions of the block of wood are 40.0 cm by 50.0 cm by 25.0 cm. What is the mass of the block of wood? Show all calculations.
  20. physics

    As shown in the diagram, a bullet of mass 7.0 g strikes a block of wood of mass 2.1 kg. The block of wood is suspended by a string of length 2.0 m, forming a pendulum. The bullet lodges in the wood, and together they swing upward a distance of 0.40 m from
  21. optimization calculus

    sandy is making a closed rectangular jewwellery box with a square base from two different woods . the wood for top and bottom costs $20/m^2. the wood for the side costs $30/m^2 . find dimensions that minimize cost of wood for a volume 4000cm^3?
  22. physics

    A 2.5 wood block is pulled along a wood floor at a steady speed. A second wood block, with mass 3.5 , is attached to the first by a horizontal string. what is the magnitude of the force pulling on the first block
  23. physics

    A 25 g bullet is fired from a gun into a 1.35 kg block of wood initially at rest. (The bullet sticks in the wood). The wood is driven 9.5 m across a horizontal surface with coefficient of friciton 0.25. Find the speed of the bullet just before impact.
  24. physics

    A 3.6 kg wood block is launched up a wooden ramp that is inclined at a 30¡ angle. The block's initial speed is 13 m/s. (Use µk = 0.20 for the coefficient of kinetic friction for wood on wood.) What vertical height does the block reach above its starting
  25. physics

    The 2.0 kg wood box in the figure(Figure 1) slides down a vertical wood wall while you push on it at a 45 ∘ angle. The coefficient of kinetic friction of wood on wood is μk = 0.200. What magnitude of force should you apply to cause the box to slide down
  26. Math

    Bella sells a jewelry at a market. She cuts out a rectangular piece of wood for a necklace display. The lenght of the piece of wood is 3/4 foot. The width of the piece of wood is 1/3 foot. What is the area, in square feet, of the piece of wood bella cuts
  27. math

    a cubical wooden box of internal edge 1m is made of 5cm thick wood.The box is open at the top . if the wood costs Rs. 9600 per cubic metre, find the cost of the wood required to make the box?
  28. math

    A cube of wood measures 5 centimeters on a side and weighs 19 grams. What is the density of the cube of wood? Will the cube of wood float in water?
  29. chemistry

    14/6 c has a half-life of 5600 years. An anyalsis of charcoal from a wood fire shows that 14c content is 25 per cent of living wood. how many years have passed since fire for the wood was cut
  30. Physics - Spring

    Suppose a 1.5kg block of wood is slid along a floor and it compresses a spring that is attached horizontally to a wall. The spring constant is 555N/m and the block of wood is traveling 9.0m/s when it hits the spring. Assume that the floor is frictionless
  31. math

    Jackson has a 2-meter plank of wood. He cuts two pieces of wood that are each 0.55 meter long. Then he cuts another piece that is 0.28 meter long. He uses the remainder of the wood to make a ramp. What length of wood did he use for the ramp?
  32. Science

    Carbon-14 has a half-life of about 5,600 years. Archaeologists analyze a piece of wood found at an ancient village site and determine that, of he initial 100 grams of Carbon-14 in the wood, onl 3.125 grams are left. How old is the wood?
  33. Physics

    A block of wood, with density 828 kg/m3 , has a cubic shape with sides 0.340 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. The lead pulls the wood into the water until it is just completely covered with water.
  34. Physics Please help

    A block of wood, with density 828 kg/m3 , has a cubic shape with sides 0.340 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. The lead pulls the wood into the water until it is just completely covered with water.
  35. Physics

    A block of wood, with density 828 kg/m3 , has a cubic shape with sides 0.340 m long. A rope of negligible mass is used to tie a piece of lead to the bottom of the wood. The lead pulls the wood into the water until it is just completely covered with water.
  36. science

    The ashes left after the woods burns have less mass than the wood had . which statement explains what happened to the rest of the wood's mass. a. it was lost as heat b. it is in gases in the air c. it is still in the wood d it is in the ashes, but its
  37. PHYSICS

    A piece of wood is floating at the surface of some water as illustrated (the diagram is not to scale). The wood has a circular cross section and a height h = 4.0 cm. The density of water is 1.00 g/cm3. The distance y from the surface of the water to the
  38. Plane and Solid Geometry

    A piece of wood whose ends are square was cut from a cylindrical piece of wood which was cut from the same pieces of wood whose ends are squares 10 centimeter by 10 centimeter and length 20 centimeter. Find the volume of wood(smallest volume) with the
  39. Physics-science

    A block of wood has a mass of 3.6kg and specific gravity of 0.6. It is to be loaded with lead of density of 11300 kg per cubic metre so that it floats in water with 0.90 of its volume immersed. What mass of lead is needed? (a) if the lead is on top of the
  40. Math

    Scarlet-Camille needs three lengths of wood to finish a project. She needs one piece measuring 148 cm, one piece measuring 38 cm, and one piece measuring 42 cm. Every time Scarlet-Camille cuts a length of wood she loses 3 mm of wood. If Scarlet-Camille can
  41. physics

    A bullet of mass 10 g has a speed of 500 m/s. a) What is its kinetic energy? b) if it penetrates a block of wood a distance of 10 cm before coming to rest, what is the average frictional force stopping the bullet? A second bullet identical to the first is
  42. Physics

    A 0.075-kilogram dart strikes a 2-kilogram stationary block of wood. If the dart sticks in the wood and the dart and wood fly off together at 1.5 meters per second, what was the approximate original speed of the dart?
  43. Math 10

    A carpenter needs to cut 50 cm pieces of wood for table legs. If he has 5 yards of wood, how many legs can he cut? Does he have any wood left over?
  44. math

    A wood burner burns 180 pounds of wood in 5/2 days . How many pounds of wood is needed for the burner in 1 month.
  45. Physics

    A 14g bullet is traveling at 306m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of wood?
  46. Physics

    A 41g bullet is traveling at 499m/s when it strikes a block of wood. If the block of wood exerts a force of 50,000 N opposing the motion of the bullet, how far will the bullet penetrate the block of wood?
  47. science

    Which object listed below will scatter light? A.a peice of wood B.a tinted window C.a pair of eyeglasses D.a clear window panel i think that's d sorry tyler bake r that is wrong ! A frosted window scatters light, but b, c, and d all let light go through in
  48. physics

    A 6.2 g piece of clay is propelled horizontally onto a block of wood with a mass of 18.4 g. The wood block is initially at rest on a 1.75 m tall post. After the collision the wood block will land 2.2 m from the base of the post. Find the initial speed of
  49. Math

    A carpenter sawed a piece of wood into 3 pieces of wood into 3 pieces. The ratio of wood pieces is 1:3:6. The longest piece is 2.5 feet longer than the shortest piece. Use the draw a diagram strategy to find the length of the original piece.
  50. Physics

    A bullet with a mass of 0.01kg is fired horizontally into a block of wood hanging on a string. The bullet sticks in the wood and causes it to swing upward to a height of 0.1m If the mass of the wood block is 2kg, what is the initial speed of the bullet?
  51. Physics

    1. A bullet of 0.0500 kg is fired into a block of wood. Knowing that the bullet left the gun with a muzzle velocity of 350. m/s, and the bullet penetrates .15 m into the block of wood, determine: a) The average force required to stop the bullet. b) The
  52. PHYSICS HELP!-Hooke's Law

    You should expect concrete to have an elastic constant that is _____ than wood. a. larger than b. smaller than c. equal to So...based on what I looked up as the definition for elastic constant and linear elasticity, I think conrete is less elastic than
  53. college physics 1

    The coefficient of static friction between a block of wood of mass 29.2-kg and a rough table is 0.51. The table is slowly tilted until the block of wood starts to slide down the surface. At what angle of the table with respect to the horizontal does the
  54. Physics - Aristotle and his theory

    Aristotle beleived that wood was a combination of fire, water, and earth. Use his 4 element theory to explain why a wooden boat floats on water. His theory is hard for me to understand. The only thing I know is that the boat floats on the water because the
  55. Math

    Mike had some pieces of wood to build a doghouse. He cut each piece in fourths. Then he had 24 pieces of wood. How many whole pieces of wood did Mike have to start with?
  56. Chemistry

    1. A piece of rectangular wood that measures 3.0 cm by 6.0 cm by 4.0 cm has a mass of 80.0 grams. What is the density of the wood? Would the piece of wood float in water? 2. I threw a plastic ball in the pool for my dog to fetch. The mass of the ball was
  57. physics

    a bullet of mass 20g is fired into a block of wood of mass 400g . if the bullut and wood move together with speed of 20ms-1 calclate(i) speed with the bullet hits the wood ii the kinetic energy lost iii state the energy changes involed
  58. Physics

    A 0.13 kg bullet traveling at 614 m/s hits a 5.7 kg block of wood and stays in the wood. What is the velocity (speed)of the wood block immediately after the bullet hits it
  59. Philosophy

    -- How much wood could a wood chuck chuck, if a wood chuck could chuck wood? -- How much will could Will Smith smith, if Will Smith could smith wills? Thank you for using the Jiskha Homework Help Forum although I seriously suspect this is NOT a homework
  60. Science

    A block of wood has a mass of 120 g and volume of 200 cm3. What is the density of the wood?
  61. Chemistry

    A 1.75 gram perfect cube of wood has a side measure of 2.45 cm, what is the density of the wood?
  62. science

    when wood burns, the ashes have different chemical properties from the wood.true or false?
  63. science

    If wood weights 18 grams with a density of 0.5 what is the volume ans what type of wood is it
  64. Chemistry

    A piece of wood sinks in ethanol but floats in gasoline. Give a range of possible densities for the wood?
  65. maths

    a carpenter needs to cut a plank of wood that is 3.75m long into 5 equal pices what is the length of each piece of wood?
  66. chemistry

    Hello. Please, help me do this. I would be really thankful! Find the mass of triacetate, which you can get from 1.62 ton of wood waste. The yield of process is 75% and there are 50% of cellulose in wood.
  67. science

    Hello. Please, help me do this. I would be really thankful! Find the mass of triacetate, which you can get from 1.62 ton of wood waste. The yield of process is 75% and there are 50% of cellulose in wood.
  68. Physical Science

    If six blocks of wood were cut from the same board , would all the pieces of wood have the same density?
  69. Math

    The top of a table is in the shape.of a regulations pentagon. The wood should measure 1 1/2 feet on each side. What is the perimeter of the piece of wood?
  70. Physics

    A 4.1 g dart is fired into a block of wood with a mass of 20.2 g. The wood block is initially at rest on a 1.2 m tall post. After the collision, the wood block and dart land 2.6 m from the base of the post. Find the initial speed of the dart.
  71. Physics

    A 3.5 g dart is fired into a block of wood with a mass of 22.8 g. The wood block is initially at rest on a 1.3 m tall post. After the collision, the wood block and dart land 2.6 m from the base of the post. Find the initial speed of the dart. m/s
  72. Physics

    A 4.5 g dart is fired into a block of wood with a mass of 23.8 g. The wood block is initially at rest on a 1.3 m tall post. After the collision, the wood block and dart land 3.6 m from the base of the post. Find the initial speed of the dart.
  73. Physics

    A 4.3 g dart is fired into a block of wood with a mass of 22.6 g. The wood block is initially at rest on a 1.4 m tall post. After the collision, the wood block and dart land 3.1 m from the base of the post. Find the initial speed of the dart.
  74. physics, buoyance

    A wood cube 0.20m on each side has a density of 730kg/m3 and floats levelly in water. Part A What is the distance from the top of the wood to the water surface? Part B What mass has to be placed on top of the wood so that its top is just at the water
  75. Physics

    A 4.3 g dart is fired into a block of wood with a mass of 22.6 g. The wood block is initially at rest on a 1.4 m tall post. After the collision, the wood block and dart land 3.1 m from the base of the post. Find the initial speed of the dart.
  76. Momentum

    A 4.4 g bullet is fired into a block of wood with a mass of 21.3 g. The wood block is initially at rest on a 1.3 m tall post. After the collision, the wood block and bullet land 2.4 m from the base of the post. Find the initial speed of the bullet.
  77. physics

    A 0.52 kg piece of wood floats in water but is found to sink in alcohol (specific gravity = 0.79) in which it has an apparent mass of 0.040 kg. What is the SG of the wood?
  78. Physics

    A 2.0 kg wood block is launched up a wooden ramp that is inclined at a 25 ∘ angle. The block's initial speed is 14 m/s . The coefficient of kinetic friction of wood on wood is μk=0.200. What vertical height does the block reach above its starting point?
  79. science

    a piece of wood that measures 3.0 cm by 4.0 cm by 5.0 cm has a mass of 90.og. what is the density of the wood? would the piece of wood float in water? remember the density of water is 1.00g/ml
  80. 8th grade science

    The densities of four different woods are shown below. Wood Sample Densities Type of wood: African Teakwood Density(g/cm3) 0.98 Type of wood: Balsa Density(g/cm3) 0.14 Type of wood: Cedar Density(g/cm3) 0.55 Type of wood: Ironwood Density(g/cm3) 1.23 Which
  81. Physics

    A .22 rifle bullet, traveling at 373m/s, strikes a block of soft wood, which it penetrates to a depth of 0.125m. The block of wood is clamped in place and doesn't move. The mass of the bullet is 1.90. Assume a constant retarding force.How much time is
  82. Science

    Imagine you find a piece of wood on the beach. The next day, the wood is 100 meters farther north. How might it have moved? Your answer should refer to currents
  83. Science

    Imagine you find a piece of wood on the beach. The next day, the wood is 100 meters farther north. How might it have moved? Your answer should refer to currents
  84. Physic

    If a 35 g arrow moving at 160 km/h penetrates a block of wood suspended by a rope, what impulse is delivered to the block? (Answer: 1.56kg * m/s) What velocity will the wood block acquire if its mass is 7.0 kg? Ignore the mass of the arrow compared to that
  85. Calc

    a large closed storage rectangular box with a base constructed with two different types of wood. the base is made up of wood $5 per square feet and the top and sides are made of wood $3 per square feet suppose the amount available to spend is $1000 find
  86. Physics

    Two blocks of identical mass are placed in water. One is made of aluminum, the other of wood. The wood block is noted and therefore floating. Upon which is the buoyant force greater? 1) on the aluminum block, 2) on the wood block or 3) they both experience
  87. Physics

    Two blocks of identical mass are placed in water. One is made of aluminum, the other of wood. The wood block is noted and therefore floating. Upon which is the buoyant force greater? 1) on the aluminum block, 2) on the wood block or 3) they both experience
  88. Maths

    A closed rectangular wooden box has external dimensions 17x12x10. If the wood is 1cm thick, calculate the volume of wood required to make it. (All measurements are in Cm)
  89. math

    the diagram shows a piece of wood in the shape of a cuboid. diagram: 3cm width, 20cm length, 1.2m for the volume of cuboid The piece of wood is 3cm by 20cm by 1.2m. The mass of wood will float in sea water if the density of the wood is less than the
  90. physics

    A block of wood of mass 6.0 kg slides along a skating rink at 12.5 m/s^2 [w] . The block slides onto a rough section of ice that exerts a force of 30 N force of friction on the block of wood. The acceleration of the block of wood is 5.0 m/s^2 [E] and it
  91. physics

    A block of wood of mass 6.0 kg slides along a skating rink at 12.5 m/s^2 [w] . The block slides onto a rough section of ice that exerts a force of 30 N force of friction on the block of wood. The acceleration of the block of wood is 5.0 m/s^2 [E] and it
  92. chemistry

    water has a density of 1g/cm3 ; if 2 different pieces of the wood are put into water which will float and which will sink ? Wood 'a' has a density of 1.19g cm3 Wood "b" has a density of .67 g/cm3 Explain your answer?
  93. physics

    the coefficient of starting friction for wood on wood is 0.55. What is the force of friction of a wood block of mass 3.5 kg being pulled on a wood floor? i think i use the formula F=mMA where F is the force needed to move a solid from rest, m=coefficient
  94. chemistry

    I need to understand the following question 14/6 C has a half-life of 5600years. an analysis of charcoal from a wood fire shows that its 14c content is 25 per cent higher that of living wood How many years have passed.
  95. physics

    equal masses m of stone and wood reach thermal equilibrium at T=290. the initial temperature of the wood reach is T=285. find the initial temperature of the stone.(specific heat of wood=1764 and specif heat of stone =882)
  96. Calc

    Gloria would like to construct a box with volume of exactly 55ft3 using only metal and wood. The metal costs $12/ft2 and the wood costs $9/ft2. If the wood is to go on the sides, the metal is to go on the top and bottom, and if the length of the base is to
  97. adv functions

    joe is building a wooden cylindrical storage box. the box will have a volume og 6pi m^3. for design purposes, the thick wood for the top and the bottom costs $6/m^2 and the thinner wood for the sides cost $5/m^2. a)express the cost of the wood as a
  98. How much?

    How much wood could a wood chuck chuck if a wood chuck could chuck wood? I NEED THE ANSWER ASAP!!
  99. physics

    A metal wedge can be used to split wood pieces. This one has a base only 2 inches across. The length of the wedge is 12 inches. The largest force you can exert with your hammer is 500lbs. As you pound your wedge into the wood, what is the largest sideways
  100. math

    Frank has a rectangular piece of wood 45 cm by 75 cm. what are the largest identical squares. Frank can make by cutting the wood. What assumptions have you made.

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