The collar of mass m is released from rest while in position a and subsequently travels with negligible friction along the vertical-plane circular guide. determine the magnitude of the normal force exerted by the guide on the collar (a) just before the collar passes point b, (b) just after the collar passes point b (i. e., the collar is now on the curved portion of the guide), (c) as the collar passes point c, and (d) just before the collar passes point d. use the values m = 0.6 kg, r = 2.1 m, and k = 225 n/m. the unstretched length of the spring is 0.59r.

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Ways that industry and agriculture use physical properties to separate substances

What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 480 ? the index of refraction of the film is 1.34, and there is air on both sides of the film. express your answer in nanometers. hint 1. how to approach th