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An elastic cord has an unstreched length of 8.1 m and a cross-section of 2 cm^2. If the Young's Modulus of the material is made from is 310 MN/m^2 what is the effective spring constant of the cord for stresses and strains where Young's Modulus is valid?
As part of a safety investigation, two 1900 cars traveling at 23 are crashed into different barriers. Find the average forces exerted on (a) car that hits a line of water barrels and takes 1.5 to stop, and (b) car that hits a concrete barrier and ta..
A wire 3.00 m long and 0.450 mm2 in cross-sectional area has a resistance of 39 at 20°C. what is the temperature coefficient of resistivity
A young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.32 rad/s^2. If the tangential acceleration of the yo-yo at the end of the string is 0.15 m/s^2, how long is string.
A thin spherical shell rolls down an incline without slipping. what is the angle the incline makes with the horizontal
A glass window pane is exactly 20 cm by 36 cm at 10oC. By how much has its area increased as it temperature is 33oC, assuming that it can expand freely? Take the coefficient of thermal expansion for the glass to be exactly 9 x 10-6/Co.
What is the highest height reached by the rocket. what is its initial speed as it leaves the ground.
The work needed to remove an electron from the surface of sodium is 2.3 eV. How big maximal velocity will have electrons if the surface of sodium will be illuminated with ultraviolet light wave length
The gauge pressure in a helium gas cylinder is initially 26atm. What fraction of the original gas remains in the cylinder
A solenoid that is 111 cm long has a cross-sectional area of 13.8 cm2. There are 958 turns of wire carrying a current of 7.62 A. Calculate the energy density of the magnetic field inside the solenoid
Starting from rest, object 1 is subject to a 10Nforce for 2.0 s. Object 2, with twice the mass, is subject to a 15N force for 3.0 s
Which vector has the largest x component and y component
What is current temperature and peak wavelength What is the proper description of their situation
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