How far will the platform drop (due to elongation of the wires) if a 50kg load is placed at the center of the platform?ĭetermine the fractional change in volume as the pressure of the pressure of the atmosphere (0.1Mpa) around a metal block is reduced to zero by placing the block in vacuum. Young’s modulus for the material of the wires is 180000Mpa. The wires are 3m long and have a diameter of 2.0mm. The platform is suspended by four wires at its corners. The cross-sectional area of the wire is…… What is the longitudinal stress? If the length after stretching is 120.10m, what is the longitudinal strain? Determine Young’s modulus for the wire. (iii) Determine the Young’s modulusof the wire?ĩ.When an object is submerged in the ocean to adepth of 3000m, the pressure increases by about 3030N/m² decrease in volume when ivnered to this depth? The bulk modulus of aluminum is 7×10¹⁰N/m²ġ0.Find the exerted on the palm of your hand by atmospheric pressure.assume yuor palm measures 0.080 m by 0.10m.Ī telephone wire 120m long and 2.2mm in diameter is stretched by a force of 380N. You exert a hurizontal furce of 0.20N on top surface parallel to the surface and observe a side ways duspalacement of 5mm.what is the shear modulus of the jell-o?Ĩ.A 500N object is hung from the end of awire of cross-sectional area 0.010×10⁻⁴m² as in agure(a).the wire stretches from its origanal lenght of 200.00×10⁻²m to 250.00×10⁻²m. When the temprature rises 10⁰c, such a beam will expand in lenght by 1.2mm if it is free to do this expansion from happening?. it is mounted between two concrete aboutments with no room for expansion. At the top of the box the pressure is 105.0 kPa at the bottom the pressure is 106.8 kPa. Assume the area of yuor fingerip is 1.0 ×10⁻⁴m²,and the area of the needle tip is 2.5×10⁻⁷m².(c) Find the minimum force necessary to pop the balloon with the needle, given thatbthe balloon pops with a pressure of 3.0×10⁵N/m².ĥ.A cubical box 20.00 cm on a side is completely immersed in a fluid. The gauge pressure in the oil acts, by Pascal’s Principle, on the bottom of the large piston to produce the force that lifts the load:Ĥ.Find the pressure exrted on the skin of a balloon if younpreess with a force 2.1N using (a) your finger or(b) a needle. if the diameter of the large piston of the lift is 1 ft, what gauge pressure in Ib/in² must be applied to the oil?Ĥ. A hydraulic lift is to be used to lift a truck weighting 5000lb. Standard atmospheric pressure is 1.01 x 10⁵ Pa. Find the ratio of a systolic blood pressure of 120 (in mmHg) to atmospheric pressure. Consequently, the force on the window pane is perpendicular to the pane and I given byĢ. The atmosphere exerts a force normal to any surface placed in it. How large a force does the air in a room exert on the inside of a window pane that is 40cm x 80cm? (b) If the heat of vaporization of this fictitious substance is 600kJ/kg and the mass is 80 g, how much heat must be added to the 30.0mL of liquid to reach the volume 100mL?ġ. What fraction, x, of the mass of the liquid has vaporized(at pressure P) when the volume is V = 100mL? (a) Suppose the volume V in Fig,15-7 is 30.0ml, while taht of V is 200 ml. Assume an emissivity of 0.900 for the person’s skin.
Find the net radiated power from this person (a) in a dressing room, where the temperatura is 293K(-20⁰C), and (b) outside, where the temperature is 273K (-0⁰C). One of these hardy soyls has a surface area of 1.15m² and a surface temperature of 303 K( -30⁰C). On New Year’s Day several human “polar bears” prepare for their annual dip into the icy waters of Narragansett Bay. The heat capacity of 1.00kg of water is 4186J/K.what is the temperature change of the water if(a)505 J of heat is added to the system, or (b)1010 J of heat is removed?Ĭalculate the radiated power from a sphere with a radius of 5.00 cm at the temperature 355 K. If the tower is 301m high on a 22⁰C day, how much does height decrease when the temperature cools to 0.0⁰C? The Eiffel Tower, constructed in 1889 by Alexandre Eiffel, is an impressive latticework structure made of iron.
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