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A bright object and a viewing screen are separated by a distance of 79.4 cm. At what location(s) between the object and the screen should a lens of focal length 12.8 be placed in order to produce a crisp image on the screen?
Assume a dampening depth, d, of 30 cm and a period, lambda, of 24 hours (8.64 x 104 sec). Assume a volumetric heat capacity, C, of 0.5 cal/cm °C, find the thermal diffusivity and conductivity
A piece of Nichrome wire has a radius of 7.2 x 10-4 m. It is used in a laboratory to make a heater that dissipates 3.30×102 W of power, estimate the necessary length of wire
salt water has a greater density than freshwater. a boat floats in both freshwater and saltwater. the buoyant force on the boat in salt water is __________ than in freshwater
Light of wavelength 568.0 nm is incident on a narrow slit. The diffraction pattern is viewed on a screen 62.5 cm from the slit. What is the width of the slit
A double-concave lens has equal radii of curvature of 15.1 cm. An object placed 14.2 cm from the lens forms a virtual image 4.94 cm from the lens. What is the index of refraction of the lens material
A circular wire loop of radius 0.170 m carries a current of 9.00 mA, and is placed in a 50.0 mT magnetic field. What is the maximum magnitude of this torque
A 42-g ball consists of a plastic spherical shell and a water-filled core. the shell has an outside diameter equal to 56.2 mm, What is the density of the plastic
For chlorine gas, the van der Waals constants are: a = 0.658 J·m3/mol2, and b = 5.62 × 10-5 m3/mol. What is the pressure in the container
q. a speed ramp at an airport is basically a large conveyor belt on which you can stand and be moved along. the belt of
he rest energy of an electron is 0.511 MeV. The rest energy of a proton is 938 MeV. Assume both particles have kinetic energies of 2000 MeV. Find the speed of the proton
Resistors are assigned a power rating. If the power rating isexceeded significantly, the resistor will overheat and crack.Suppose you have a 9 k ,0.2 watt resistor. What is the maximum voltage it can safelyhandle?
Three resistors are connected in series across a battery, What is the greatest voltage that the battery can have without one of the resistors burning up
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