When was the speaker invented?

Write a program to calculate and return total surface area of a box using FUNCTION _END FUNCTION.

Andrei [34K]

Answer:

def funct1():

h=int(input("Enter height of the box"))

w=int(input("Enter the width of the box"))

L=int(input("Enter the length of the box"))

surface_area=2*(h*w + h*L + w*L)

return surface_area

a=funct1()

print(a)

Explanation:

Please check the answer section.

6 0

3 years ago

What is zenmap typically used for? how is it related to nmap? describe a scenario in which you would use this type of applicatio

slava [35]

Zenmap is the graphical User Interface representation for NMAP Security Scanner. It is an open-source program designed to make NMAP easy for starters to use. Typically, it is used to collect and identify a list of hosts, OS, as well what services are running on them by using a port scanning tool. It is used specifically for the scanning and vulnerability phase of ethical hacking.

A network administrator who wishes to audit all the devices on a specific IP scheme in a network can use NMAP. The admin can go ahead and scan the ports to know exactly which ports are closed and which are opened.

8 0

3 years ago

3.A ball is thrown into the air with an initial velocity of 15 m/s. a.How long does it take the ball to reach maximum height?b.W

ehidna [41]

Answer: a) = 1.5 sec. b= 11.5 m. c=0 d= 1.5 sec.

Explanation:

a) Once thrown into the air , the only influence on the ball is gravity, so, we can conclude that the acceleration acting on the ball is the one due to gravity, i.e., g= 9.8 m/sec².

Applying the definition of acceleration, we can write the following equation:

a= (vf-vo) / t ⇒ g = vf-vo / t. (1)

Now, when the ball reaches to his maximum height, it stops momentarily, and then starts to fall, so for this height, we can write vf=0.

Replacing in (1), and solving for t, we get:

t = (0 -vo) / g = -15 m/s/ - 9.8 m/sec² (Taking upward as positive direction)

a) t= 1.5 sec.

Replacing this value in the kinematic equation for displacement, when vo=15 m/s, we get:

hmax: 15 m/sec . 1.5 sec -1/2. 9.8 m/sec². (1.5 sec) ² (2)

b) hmax= 11.5 m

c) vf= 0 (as explained above)

Finally, in order to know how long the ball takes to return to its initial height, we know that for the falling part of the trajectory, vo=0, so we can write the equation for displacement as follows:

h=-hmax (because it returns to the same starting point)= 1/2 gt²=-11.5 m

Solving for t, we get:

d) t=1.5 sec.

It can be seen that the time used in going up, it is the same for going down, to travel the same distance.

This result is completely general and applies to any free fall problem.

3 0

3 years ago

In an office there is a unisex bathroom with n toilets. The bathroom is open to both men and women, but it cannot be used by men

Gnesinka [82]

Answer:

Check the explanation

Explanation:

#include <stdio.h>

#include <stdlib.h>

#include <pthread.h>

#include <semaphore.h>

int mcount,wcount;

sem_t x,y,z,wsem,msem,cap;

void delay(void)

{

int i;

int delaytime;

delaytime = random();

for (i = 0; i<delaytime; i++);

}

void *woman(void *param)

{

sem_wait(&z);

sem_wait(&wsem);

sem_wait(&y);

wcount++;

if(wcount==1)

{ sem_wait(&msem); }

sem_post(&y);

sem_post(&wsem);

sem_post(&z);

sem_wait(&cap);

printf("woman in!\n");

delay();

printf("\twoman out!\n");

sem_post(&cap);

sem_wait(&y);

wcount--;

if(wcount==0)

{ sem_post(&msem); }

sem_post(&y);

}

void *man(void *param)

{

sem_wait(&z);

sem_wait(&msem);

sem_wait(&x);

mcount++;

if(mcount==1)

{ sem_wait(&wsem); }

sem_post(&x);

sem_post(&msem);

sem_post(&z);

sem_wait(&cap);

printf("\t\tman in!\n");

delay();

printf("\t\t\tman out!\n");

sem_post(&cap);

sem_wait(&x);

mcount--;

if(mcount==0)

{sem_post(&wsem);}

sem_post(&x);

}

int main(void)

{

int i;

srandom(60);

mcount = 0;

wcount = 0;

sem_init(&x,0,1); // for sem_init, initial value is 3rd argument

sem_init(&y,0,1);

sem_init(&z,0,1);

sem_init(&wsem,0,1);

sem_init(&msem,0,1);

sem_init(&cap,0,4); // eg. cap initialized to 4

pthread_t *tid;

tid = malloc(80*sizeof(pthread_t));

// You can use your cobegin statement here, instead of pthread_create()

// I have forgone the use of pthread barriers although I suppose they would nicely imitate the functionality of cobegin.

// This is merely to retain simplicity.

for(i=0;i<10;i++)

{

pthread_create(&tid[i],NULL,woman,NULL);

}

for(i=10;i<20;i++)

{

pthread_create(&tid[i],NULL,man,NULL);

}

for(i=0;i<20;i++)

{

pthread_join(tid[i],NULL);

}

return(0);

}

5 0

3 years ago

Louis is a civil engineer and wants to use a line on a floor plan that is indicative of the position from which a section is tak

frutty [35]

Answer:

A

Explanation:

horizontal line

8 0

2 years ago

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