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3 years ago

How can you tell that a rolling soccer ball is in motion

1 answer:

4 0

When a soccer ball is kicked the resulting motion of the ball is determined by Newton's laws of motion. From Newton's first law, we know that the moving ball will stay in motion in a straight line unless acted on by external forces. A force may be thought of as a push or pull in a specific direction; a force is a vector quantity. If the initial velocity and direction are known, and we can determine the magnitude and direction of all the forces on the ball, then we can predict the flight path using Newton's laws.

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MP3 BrainPoP Quiz

alexgriva [62]

Answer:

The typical CD sound file is 10 times larger than a typical 5 minute .mp3 file.

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3 years ago

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Which of the following statements represents the number of columns in a regular two-dimensional array named values?

puteri [66]

Answer:

(a) values[0].length

Explanation:

In programming languages such as Java, an array is a collection of data of the same type. For example, a and b below are an example of an array.

a = {5, 6, 7, 9}

b = {{2,3,4}, {3,5,4}, {6,8,5}, {1,4,6}}

But while a is a one-dimensional array, b is a regular two-dimensional array. A two-dimensional array is typically an array of one-dimensional arrays.

Now, a few thing to note about a two-dimensional array:

(i) The number of rows in a 2-dimensional array is given by;

arrayname.length

For example, to get the number of rows in array b above, we simply write;

b.length which will give 4

(ii) The number of columns in a 2-dimensional array is given by;

arrayname[0].length

This is with an assumption that all rows have same number of columns.

To get the number of columns in array b above, we simply write;

b[0].length which will give 3

Therefore, for a regular two-dimensional array named values, the number of columns is represented by: values[0].length

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3 years ago

To type the letter address, _________ space from the dateline

miskamm [114]

Answer: Double

Explanation:

I just took the test

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3 years ago

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Someone, please answer this.

Sav [38]

Answer: A loop will continue running until the defined condition returns false . ... You can type js for , js while or js do while to get more info on any of these. ... initialization - Run before the first execution on the loop. ... But it can be used to decrement a counter too. statement - Code to be repeated in the loop.

Explanation:

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3 years ago

Write a C program that creates two threads to run the Fibonacci and the Runner processes. Threads will indicate the start and th

OleMash [197]

Answer:

see explaination

Explanation:

#include <pthread.h>

#include <stdio.h>

int sumOfN = 0;

int arr[1000];

int n;

void * findSumOfN(void *a){

printf("Thread 1 Starting\n");

sumOfN = (n * (n+1)) / 2; //finds sum of first n natural numbers

printf("Thread 1 Finished\n");

pthread_exit(0);

}

void * fibonacci(void *a){

printf("Thread 2 Starting\n");

arr[0]=0;

arr[1]=1;

for(int i=2;i<n;i++) //find fibonacci numbers iteratively

arr[i]=arr[i-1]+arr[i-2];

printf("Thread 2 Finished\n");

pthread_exit(0);

}

int main(void){

printf("Please enter the value of n \n");

scanf("%d", &n);

if (n <= 0)

{

printf("Wrong input ! \n"); //input validation

return 0;

}

pthread_t thread1, thread2;

pthread_create(&thread1,NULL, findSumOfN, NULL); //Create threads

pthread_create(&thread2,NULL, fibonacci, NULL);

pthread_join(thread1,NULL); //Start threads

pthread_join(thread2, NULL);

printf("The sum of first %d numbers is : %d \n",n, sumOfN);

printf("The first %d fibonacci numbers are : \n",n);

for (int i = 0; i < n; ++i)

{

printf("%d ", arr[i]);

}

printf("\n");

return(0);

}

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4 years ago