The , is a dimensionless group important in heat transfer calculations. it is defined as , where is the heat capacity of a fluid, is the fluid viscosity, and is the thermal conductivity. for a particular fluid, 0 583 j/(g c), 0 286 w/(m c), and 1936 lb /(ft h). estimate the value of without using a calculator (remember, it is dimensionless), showing your calculations; then determine it with a calculator.

The variables for this experiment include mass, volume and the materials in the various balls, as well as their densities. in part iii, you will be investigating the questionable baseball. use the drop-down menus to complete the sentences and identify the independent and dependent variables. in part iii, the independent variable, the one that is intentionally manipulated, is . in part iii, the dependent variable, the one that you measure the response in, is

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

What is the role of lenses in microscopy?