A copper block rests a distance r from the center of a steel turntable. The coefficient of static friction between block and surface is μ
a. Please derive an equation for the angular speed w at which the block would slip
and slide off the turntable
= √/r

b. If the copper block is 0.3 m from the center and the coefficient of static friction is
0.53, at what angular speed will it slip and slide off the turntable? (4.16 rad/s)

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

Which of the choices below is one of the primary gases found in the atmosphere? a. helium b. carbon dioxide c. nitrogen d. argon

Which of the following is not a transverse wave? a) soundb) lightc) radiod) all of thesee) none of these