An air conditioning unit turns off once it reaches its goal temperature. The house warms up and the air conditioning unit turns on again. When the air conditioning unit turns on, it is an example of:

A)input

B)process

C)output

D)feedback

D) feedback.

Explanation:

An air condtioning unit consists of the following elements according to available choices:

Inputs: Refrigerant, air from surroundings, electricity.

Process: Refrigeration cycle.

Output: Conditioned air at goal temperature.

Feedback: Activation and deactivation of the air conditioning unit depending on indoor temperature.

When the air conditioning turns on and off to keep goal temperature indoors, a control stage consisting in a controller and a action element is acting to reverse the behavior of the process with a view to keep goal temperature.

Hence, correct answer is D.

a: 45.9 meters

b: 4.29 seconds

step-by-step explanation:

a: h(t)=1/2(-9.8)(3)^2+0(3)+90

h(t)=-4.9(3)^2+90

h(t)=-44.1+90

h(t)=45.9 meters

b: 0=1/2(-9.8)(t^2)+0t+90

0=-4.9t^2+90

-90=-4.9t^2

18.37=t^2

t=4.29 seconds

in the second question, the numbers aren't exact, but they're a close approximation.

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)