A ship is 150m long and has a wetted area of 5000m2. If it is encrusted with barnacles, the ship requires 7000 hp (horsepower) to overcome friction drag when moving in seawater at 15 kn (knots) and 20oC. What is the average roughness of the barnacles

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm

Apair of 10μf capacitors in a high-power laser are charged to 1.7 kv.a. what charge is stored in each capacitor? b. how much energy is stored in each capacitor?