Recent content by chaotiiic

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    Amount of energy rerquired to raise temperature

    ok thanks
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    Amount of energy rerquired to raise temperature

    both. another method i found online was to do (12000grams)*1cal/(g*K)*25 = 300,000 calories which is close to my first result. also i wasnt sure if the answer should be in joules or calories.
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    Amount of energy rerquired to raise temperature

    Homework Statement What amount of energy is required to raise the temperature of 12.0 kg of water from 0 degrees Celsius to 25 degrees Celsius? Homework Equations Q = m*c*ΔT 1 calorie = 4.186J specific heat capacity for water = 4.19x10^3 The Attempt at a Solution Q = m*c*ΔT =...
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    Volume of water a ship must displace to float

    ok thanks
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    Volume of water a ship must displace to float

    so is it g*(2.00x10^5) = (1.00x10^3)*V*g g cancels V = 200,000/1000 = 200m^3
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    Volume of water a ship must displace to float

    Homework Statement What volume of water must a ship that masses 2.00x10^5 kg displace to float? Homework Equations density = mass/volume density of water = 1.00x10^3 The Attempt at a Solution 200,000/1000 = 200 m^3 im guessing that in order to float you must displace your own...
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    Standing sound waves for fundamental and first two overtones

    actually my teacher said there wasnt enough data given for the problem to be solved. :/
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    Standing sound waves for fundamental and first two overtones

    Homework Statement Standing sound waves are produced in a pipe that is 1.40 m long. For the fundamental frequency and the first two overtones, determine the locations along the pipe (measured from the left end) of the displacement nodes if the pipe is open at both ends. Homework...
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    Conservation of angular momentum in a spinning figure skater

    oh well it doesn't matter. i just took my test tonight and probably failed.
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    Conservation of angular momentum in a spinning figure skater

    is there an equation for that or is it already given in the problem. my book says nothing about inertia of torso
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    Conservation of angular momentum in a spinning figure skater

    im still off. I_i = 2.16 I_f = M(R^2) = .5 + .4 = .9 i used thin walled hollow cylinder 2.16*2.5= 5.42 5.42 = .9ω_f ω_f = 6.02rad/s did i do something wrong? am i suppose to use thin walled hollow sphere? it gets me 7.39
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    Conservation of angular momentum in a spinning figure skater

    Homework Statement The outstretched hands and arms of a figure skater preparing for a spin can be considered a slender rod pivoting about an axis through its center. When the skater's hand and arms are brought in and wrapped around his body to execute the spin, the hands and arms can be...
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    What is the torque if the rope is attached

    a and b are right. c is 8*4500=36,000
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    What is the torque if the rope is attached

    Homework Statement a large stone obelisk that is 8meters tall is laid down flat in the center of a Roman piazza and is going to be tilted into place by a rope and pulley system tied to a team of donkeys. If the team of donkeys always pulls with a constant force of 4500N, what is the torque if...
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    Revolutions of a tire and angle in radians thru warranty

    43,427,909.66 revolutions. to find the angle do i multiply this by 2pi?