Okay so i already answered this question a. what is the density of an 84.7g sample of an unknown substance if the sample occupies 49.6cm^3? but question b. stumped me so question b. is what volume would be occupied by 7.75g of this same substance?

The crank oa rotates in the vertical plane with a constant clockwise angular velocity ω0 of 5.6 rad/s. for the position where oa is horizontal, calculate the force under the light roller b of the 10.6-kg slender bar ab.

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz.

Rank the six combinations of electric charges on the basis of the electric force acting on q1. define forces pointing to the right as positive and forces pointing to the left as negative. rank positive forces as larger than negative forces. q1,q2,q3 = positive(+) q1 = + q2 = + q3 = - q1 = + q2= - q3= + q1= - q2= + q3= + q1= + q2= - q3= - q1,q2,q3 = negative