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A certain concrete will support a maximum compressive stress of 1.28 107 N/m2 before being crushed. A column of uniform width is to be made with this concrete. How tall can the column be if the stress in it at any point is not to exceed one half the maximum value? The weight density of the concrete is 2.30 104 N/m3.
an object is located 23.0 cm to the left of a diverging lens having a focal length f -30.0 cm. use the correct sign
The contraction of the left ventricle (chamber) of the heartpumps blood to the body. estimate the force exerted by the ventricle at maximum pressure
a straight wire of length 2.09 m carries a current of 24.9 a. it is placed on a horizontal tabletop in a uniform
A laser beam is incident on two slits with a separation of 0.230 mm, and a screen is placed 5.10 m from the slits. what is the wavelength of the laser light
An ideal air conditioner operating on a Carnot cycle absorbs heat Q2 from a house at temperature T2 and discharges Q1 to the outside at temperature T1, consuming electrical energy E.
What is the magnitude of the contact force on the student by the backpack.
a uniformly charged isolated conducting sphere of 1.2 m diameter has a surface charge density of 8.1 mcm2. use gausss
A sample of an unknown material weighs 260N in air and 155 N when immersed inalcohol of specific gravity 0.700. What is the volume of the material
A cylinder of solid material weight 10.5 kg i the air, and 9.00 kg when submerged in water and 3 kg when submerged in another liquid. determine the density of the cylinder
the second order maximum produced by a diffraction grating with 560 lines per centimeter is at an angle of 3.1 degrees.
Electrons are used in a single-slit diffraction experiment. Such an experiment works well if the slit has a width of 10 times the wavelength. what is the electron energy
One mole of oxygen molecules occupies a cubic vessel of side length 10 cm at a temperature of 18 C. Calculate the pressure of the gas on the walls
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