20. Of these four materials used as a dielectric, which is the best insulator?

a. Pure water

C. Glass

b. Petroleum

d. Air

What is the difference between geosynchronous and non-geosynchronous satellites? What are the pros and cons of these two types of satellites?

Define the term bolt?

A common procedure for measuring the velocity of an air stream involves insertion of an electrically heated wire (called a hot-wire anemometer) into the air flow, with the axis of the wire oriented perpendicular to the flow direction.

Two resistors of values 7.0 and 15.0 Ω are connected in parallel. This combination in turn is hooked in series with a 3.8 - Ω resistor and a 22.3-V battery. What is the current in the 3.8 - Ω resistor?

A cylindrical water-storage tank has a height of 7.7 m and a radius of 6.0 m. The storage tank is full of water but is vented to the atmosphere. The bottom of the tank is 26 m off the ground.

Familiarity with basic fastener properties: For each of the standard fasteners specified informally below, determine the major diameter d, the pitch p, the pitch diameter dp, and the bolt length L.

The diameter of a cylinder is called the a.) stroke b.) bore c.) principal length d.) radius

Consider the following grooves, each of width W, that have been machined from a solid block of material. (a) For each case obtain an expression for the view factor of the groove with respect to the surroundings outside the groove.

What is the last step to the design process? A: Define the problem B: Present solution C: Evaluate a solution D: Develop a solution

The controller can be considered the brain of closed loop system