Recent content by blackdog666

Please, can anyone help me.

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...

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...

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...

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.

Oh, sorry I meant to say calculate the atmospheric density.

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...