we have seen that two

we have seen that two monochromatic light waves can interfere construtively or destruvtively, depending on their phase difference. one consequence of this phenomena is a. a rainbow b. the formation of an image by a converging lens, such as the lens in your eye. c. the appearence of a miraage in the dessert. d. the way in w ...continues

consider an oil film (n=1.5)

consider an oil film (n=1.5) on water (n=1.33) and light of wavelength 600 nm in air, incident on the film. the minimum film thickness for constructive interfernce of the light in air is: a. 113.nm b. 200.nm c. 150.nm d. 100.nm

Light

a beam of light falls from air onto a slab of transparent plastic at an angle of incidence of 45 degrees. the angle of refraction of the refracted ray in the plastic is 30 degrees. the refractive index of the plasti is 1 2 square root 2 1/2

a safe

a safe with a mass of 150kg is at rest on the floor. what is the minimum horizontal force needed to move the safe if the coefficent of static friction between the safe and the floor is 0.3? a.441n b. 51n c.501n d.41n

a sound

a sound level of 0 db corresponds to an intensity of: a. 10^-6 w/m^2 b. 10^-8 w/m^2 10^-12 w/m^2 0 w/m^2

a force

a force of 30N is applied perpindicularly to the face of a door at a distance of 1.5 m from the hinge of the door. find the torque on the door about its hinge a. 20 n/m b. 2nm c. 45Nm d. 20Nm

the unit of work is

what is the unit of work a.kg m^2/s b. kg m/s c. kg m/s^2 d. kg m^2/s^2

a cylindrical specimen of steel

a cylindrical specimen of steel of cross sectional area 5 cm^2 is subjected to a tensile force of 800 N. the stress in material is a. 8.0 * 10^3 N/m^2 b 4.0 * 10^3 N/m^2 c. 1.6 * 10^6 N/m^2 d. 3.2 *10^6 N/m^2

the specific heat of a

the specific heat of a gas at constant pressure is 1.70 times the specific heat at constant volume. find the specific hea at constant pressure(universal gas constant R= 8.31j/(mol k) a. 12.5j/mol k b.24.0 j/mol k c. 18.0 j/mol k d. 20.2 j/mol k

two objects have the same kinetic energy. if the

two objects have the same kinetic energy. if the object is moving 3 times faster than second object, what is the second object's mass in comparison to the first object's mass? a. 3 times larger b. it is the same c. 9 times larger d. can not determine