অষ্টম শ্রেণীর পরিবেশ ও বিজ্ঞান অধ্যায় 1.3 - তাপ বিস্তারিত আলোচনা পৃষ্ঠা ২৯ - ৪০
অষ্টম শ্রেণীর পরিবেশ ও বিজ্ঞান অধ্যায় 1.3 - তাপ বিস্তারিত আলোচনা পৃষ্ঠা ২৯ - ৪০
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00:30If t is final and t is initial, then we can write the value of the object in terms of m.
00:42Then the value of the object, which we will see later, depends on these three conditions.
00:50Let me show you.
00:52The value of the object, which we will show with q,
00:57then q is proportional to m, the value of the object.
01:00q is proportional to the quantity of the object,
01:06and this q depends on the value of the object.
01:10I will show you how it depends on the value of the object later.
01:13Now let's put these two together.
01:16q is proportional to m into t f minus t i.
01:23q is proportional to m into t f minus t i.
01:28If we put this q together,
01:30if we take a constant of this proportionality,
01:34let's say k, then k into m t f minus t i.
01:40If t f is 30 and t i is 15,
01:45then this is our initial formula.
01:50We have to work on this.
01:52Let me tell you how many small things are written here.
01:55For example, if for any value of m,
01:58q is taken to increase t degree centigrade,
02:00then for a value of 2m, we will need 2q.
02:05Then the value of q will increase.
02:07For a value of 2m, if we increase 2t degree centigrade,
02:09then 2 into 2q will be 4q.
02:12You have to understand that the amount of heat
02:15increases with the volume of the object and the area of the object.
02:22Let's write q equals to k into m into t.
02:31Then we have to find q by m into t.
02:38Actually, the amount of calories in a cube is calculated in calories.
02:45The amount of calories in a cup is calculated in grams.
02:48And the amount of calories in a tea is calculated in degrees centigrade.
02:53So, the amount of calories in a cup is calculated in grams per degree centigrade.
02:56So, the amount of calories in a cup is calculated in grams per degree centigrade.
03:16So, if we calculate the amount of calories in a cup in grams per degree centigrade,
03:26If we calculate the amount of calories in a cup in grams per degree centigrade,
03:36If we calculate the amount of calories in a cup in degrees centigrade,
03:41If we calculate the amount of calories in a cup in degrees centigrade,
04:10In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
04:17In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
04:38In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
04:46In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
05:06In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
05:19In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
05:35In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
05:50In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
06:02In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
06:31In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
07:00In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
07:07In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
07:26In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
07:51In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
08:14In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
08:43In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
08:58In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
09:23In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
09:38In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
09:58In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
10:18In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
10:38In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
10:58In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
11:18In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
11:38In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
11:58In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
12:18In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
12:38In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
12:58In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
13:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
13:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
14:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
14:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
14:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
15:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
15:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
15:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
16:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
16:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
16:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
17:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
17:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
17:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
18:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
18:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
18:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
19:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
19:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
19:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
20:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
20:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
20:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
21:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
21:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
21:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
22:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
22:38In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
22:58In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
23:18In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
23:48In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
24:08In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.
24:28In this case, we have to calculate the amount of calories in a cup in grams per degree centigrade.