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bearhunter [10]
3 years ago
12

The Danish scientist Niels Bohr proposed a model of the atom that is not totally accurate today but still contains components th

at are useful for today's students.
Bohr's model is sometimes called the __________ model because it resembles a mini-solar system.
A. universal
B. planetary
C. atomic
D. nuclear
Engineering
1 answer:
blagie [28]3 years ago
7 0

Answer:

Option B

Planetary

Explanation:

In 1913, Niels Bohr proposed a model to explain the stability of orbits around the nucleus. Niels believed that light is emitted by an electron when the electron's energy changes. Bohr Atomic Model is sometimes called planetary model because it resembles a mini-solar system.

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Design a PI controller to improve the steady-state error. The system should operate with a damping ratio of 0.8. Compute the ove
blondinia [14]

Answer:

The MATLAB Code for this PI Controller will be:

Kp = 350;

Ki = 300;

Kd = 50;

C = pid(Kp,Ki,Kd)

T = feedback(C*P,1);

t = 0:0.01:2;

step(T,t)

Explanation:

When you are designing a PID controller for a given system, follow the steps shown below to obtain a desired response.

Obtain an open-loop response and determine what needs to be improved

Add a proportional control to improve the rise time

Add a derivative control to reduce the overshoot

Add an integral control to reduce the steady-state error

Adjust each of the gains $K_p$, $K_i$, and $K_d$ until you obtain a desired overall response.

The further explanation is attached in the Word File.

Download docx
5 0
3 years ago
1. The construction process begins with which of the following stages?
Firdavs [7]

Answer:

c) site preparation

Explanation:

A construction process can be defined as a series of important physical events (processes) that must be accomplished during the execution of a construction project.

Generally, in the construction of any physical asset such as offices, hospitals, schools, stadiums etc, the first step of the construction process is site preparation. Site preparation refers to processes such as clearing, blasting, levelling, landfilling, surveying, cutting, excavating and demolition of all unwanted objects on a piece of land, so as to make it ready for use.

This ultimately implies that, site preparation should be the first task to be accomplished in the construction process.

Hence, the construction process typically begins with site preparation before other activities such as the laying of foundation can be done.

Additionally, construction costs can be defined as the overall costs associated with the development of a built asset, project or property. The construction costs is classified into two (2) main categories and these are; capital and operational costs.

7 0
3 years ago
Both model building codes and NFPA __________ can be used to determine the type of construction used in a building.
Alex777 [14]

Answer:

Both model building codes and NFPA 220 can be used to determine the type of construction used in a building.

8 0
2 years ago
Which one of the following questions about population growth is the only TRUE statement?A) The size of a population can never ex
tatyana61 [14]

Answer:

Explanation:

5

6 0
3 years ago
When your hands are on home row, they are resting on the____.
MArishka [77]

Answer:

to which four fingers of each hand return as a base, on a QWERTY keyboard being A, S, D, and F for the left hand and J, K, L, and the semicolon for the right

Explanation:

4 0
3 years ago
Read 2 more answers
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