Ablock of mass 10 kg and measuring 250 mm on each edge is pulled up an inclined surface on which there is a film of sae 10w-30 oil at 30° f (the oil film is 0.025 mm thick). find the steady speed of the block if it is released. if a force of 75 n is applied to pull the block up the incline, find the steady speed of the block. if the force is now applied to push the block down the incline, find the steady speed of the block. assume the velocity distribution in the oil film is linear. the surface is inclined at an angle of 30° from the horizontal

What is friction? how does it affect the motion of an object?

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.

Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.