The earliest civil engineer known by name is Imhotep. As one of the officials of the Pharaoh, Djosèr, he probably designed and supervised the construction of the Pyramid of Djoser (the Step Pyramid) at Saqqara in Egypt around 2630–2611 BC.

8 0

3 years ago

A cannon ball is fired with an arching trajectory such that at the highest point of the trajectory the cannon ball is traveling

ELEN [110]

Answer:

The radius of curvature is 979 meter

Explanation:

We have given velocity of the canon ball v = 98 m/sec

Acceleration due to gravity $g=9.81m/sec^2$

We know that at highest point of trajectory angular acceleration is equal to acceleration due to gravity

Acceleration due to gravity is given by $a_c=\frac{v^2}{r}$ , here v is velocity and r is radius of curvature

So $\frac{98^2}{r}=9.81$

r = 979 meter

So the radius of curvature is 979 meter

8 0

4 years ago

Can you identify the major theme illustrated by each of the following examples? If necessary, you may review the themes in Chapt

Bingel [31]

Where are the master plans stored and order given?

7 0

3 years ago

An isolation transformer whose main purpose is to reduce voltage spikes will have a turns ratio of?

garik1379 [7]

Answer:

An isolation transformer whose main purpose is to reduce voltage spikes will have a turns ratio of 1 to 1.

This is due to the windings input and output having the same waveform and amplitude.

6 0

2 years ago