True or false

1. The detonation of a low explosive produces a pressure wave that travels at less than 340 m/s. Obj. 5.2

In a bicycle race, a bicyclist coasts down a hill with a 7 % grade to save energy. The mass of the bicycle and rider is 80 kg, the projected area is 0.2 m2, and the drag coefficient is 0.9. Air temperature is 17 ºC.

I have two questions to ask. 1.) When does the iron core in an electromagnet become magnetic? 2.) What is the principle called that allows us to produce electricity?

The motion of a particle is defined by the relation x = t3 - 6t2 + 9t + 3, where x and t are expressed in feet and seconds, respectively. Determine When the velocity is zero The position, acceleration and total distance traveled when t = 5 sec

Technician A says that load-carrying ball joints should always have some play in them. Technician B says that follower ball joints should never have some play in them. Who is correct? a. Technician A b. Technician B c. Both A and B d.

Check the answer that best describes the relationship between f (x) and x. (For example if f (x) is Θ (x) check that as your answer and not O (x) or Ω (x) even though these are true also in this case.) (a) f (x) = 10 is A. O (x) O (x) B.

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

What is the main role of matrix in composites! a) - to transfer stress to the other phases b) - to protect phases from environment c) - to reduce the hardness d) - to enhance ductility