Recent content by ctpengage

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    Period of oscillation of spring system

    guys?
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    Period of oscillation of spring system

    does anyone have a link to an animation
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    Period of oscillation of spring system

    Please help this question has been giving me nightmares.
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    Period of oscillation of spring system

    Can anyone please describe the motion qualitatively? I cannot visualize this problem. After the blow, the spring is maximally compressed and the block on the right moves to the right, away from the wall. I know that the left mass leaves the wall the first time that the right mass has its maximum...
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    Penguin huddling -Heat transfer mechanisms -Radiation problem

    cmon guys please help
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    Penguin huddling -Heat transfer mechanisms -Radiation problem

    Homework Statement To withstand the harsh weather of the Antarctic emperor penguins huddle in groups. Assume that a penguin is a circular cylinder with a top surface area of 0.34m2 and a height of 1.1m. If penguins huddled closely to form a huddled culinder with a top surface area of Na and...
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    Heat transfer mechanisms problem; Conduction

    please answer
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    Heat transfer mechanisms problem; Conduction

    Homework Statement Diagram is attached showing part (a) and part (b) Two identical rectangular rods of metal are welded end to end (a), with temperature of T1=0 0C on the left side and a temperature of T2=100 0C on the right hand side. In 2.0 minutes, 10J is conducted at a constant rate...
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    Thermal expansion, percent change in density problem

    oh my god thanks so much
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    Thermal expansion, percent change in density problem

    Homework Statement When the temperature of a metal cylinder is raised from 0.0°C to 100°C, its length increases by 0.23%. Find the percent change in density. Homework Equations ∆L = L∆T p=m/v The Attempt at a Solution I don't have any real idea how to start the problem. How...
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    Current density, resistance and resistivity problem

    please answer guys
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    Current density, resistance and resistivity problem

    In a problem it states that: A 10.71 V battery is connected to a resistive strip that consists of three sections with the same cross-sectional areas but different conductivities. In the solution to the problem it stipulates that the current density of the three sections are equal. Where in...
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    Calculating the capacitance problem

    Homework Statement If an uncharged parallel-plate capacitor (capacitance C) is connected to a battery, one plate becomes negatively charged as electrons move to the plate face (area A). The depth d from which the electrons come in the plate in a particular capacitor is plotted against a range...
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    Net force, force diagrams, normal force

    The problem is this: a 0.250 kg block of cheese lies on the floor of a 900 kg elevator cab that is being pulled upward by a cable through distance d1 = 2.40 m and then through distance d2 = 10.5 m. (a) Through d1, if the normal force on the block from the floor has constant magnitude FN = 3.00...
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    Net force, force diagrams, normal force

    its just that for a simple problem of that nature, in the student solutions manual it made use of the normal force for the solution.