I put a force of 75N on an object to keep it going in a circle 4m long, Its speed is 3.0m/s, what is its mass?

Four objects are being tested to see how they are affected by fluid friction. object w has a surface area of 4.5 cm2, object x has a surface area of 2.5 cm2, object y has a surface area of 6.2 cm2, and object z has a surface area of 3 cm2. which object would experience the most fluid friction?

What is created when solids, liquids, an gases mix with one another

What tightening torque should be used for a hexagonal head screw (not split-bolt) on a 250 kcmil conductor?