What are the different types of forces acting on the water molecules in contact with sides of the vessels

Curious carl calculated the density of a cube to be 4.50 g/cm3. what is the density of the cube in g/l?

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

What is the electric force acting between two charges of -0.0045 c and -0.0025 c that are 0.0060 m apart? use fe=kq1q2/r^2 and k = 9.00 x 10^9 n*m^2/c^2 a. 1.7 x 10^7 n b. -1.7 x 10^7 n c. -2.8 x 10^9 n d. 2.8 x 10^9 n