Recent content by blackdog666

  1. B

    Calculating Force and Distance in a Hydraulic Lift System

    Homework Statement In a hydraulic lift, the radii of the pistons are 2.50 cm and 10 cm. A car of mass 1000 kg is to be lifted for inspection. b) what force must be applied to the proper piston to be able to lift the car with ease? C) If the smaller piston is pushed by 10 cm, how far is the...
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    Determining the change in temperature

    Homework Statement A person sitting in a room has a heat output of 200W. Please calculate... A) How much energy does a room of 45 people release over a course of 1 hour? B) Assuming that all the energy in part a is transferred to a room of 300 M^3 of air. The air has a specific heat...
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    Why Does Ted Experience Dizziness When Standing Up Too Quickly?

    Homework Statement Ted is lying down and attempts to stand up. However Ted stands up too fast, and experiences dizziness. To compensate for this effect, the vessels in Ted's head expand. Why does this dizziness happen and why does the body respond by expanding the vessels in Ted's head...
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    Atmospheric density calculation (of mars)

    Yeah. I'm really confused. I'll ask my teacher the next time I see her, and see if maybe she left out some information.
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    Atmospheric density calculation (of mars)

    Oh, sorry I meant to say calculate the atmospheric density.
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    Atmospheric density calculation (of mars)

    Homework Statement gravitational constant G=6.67x10^-11 Nm^2/Kg^2, M=6.42x10^23 Kg, and R=3.40x10^6 m for mars. Calculate the atmospheric density of Mars. Homework Equations Density of water = 1000 Kg/m^3 Atmospheric pressure = 30 Pa (from what I've calculated) p=M/V The Attempt at a...
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