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Some interesting tongue twisters to improve your fluency

Let's try to pronounce.  ◇Supercalifragilisticexpialidocious ◇Pneumonoultramicroscopicsilicovolcanoconiosis ◇I scream, you scream, we all scream for ice cream. ◇I have got a date at a quarter to eight; I’ll see you at the gate, so don’t be late. ◇I saw a kitten eating chicken in the kitchen. ◇I thought I thought of thinking of thanking you. ◇He threw three free throws. ◇Four fine fresh fish for you. ◇Nine nice night nurses nursing nicely. ◇We surely shall see the sun shine soon. ◇If you notice this notice, you will notice that this notice is not worth noticing. ◇A proper copper coffee pot. ◇Give Papa a proper cup of coffee in a copper coffee cup. ◇Betty bought butter but the butter was bitter, so Betty bought better butter to make the bitter butter better. ◇I thought a thought. But the thought I thought wasn’t the thought I thought I thought. If the thought I thought I thought had been the thought I thought, I wouldn’t have thought I thought. ◇If practice makes perfect and perfect ...
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Why catching hilsa fish is banned in Bangladesh for 22 days in 2026?

Why catching hilsa fish is banned in Bangladesh for 22 days in 2026? Hilsa a GI product of Bangladesh from 2017 will not be allowed to catch form October 8 to 29 for 22 days nationwide to create a welcoming environment for mother hilsa fish that migrates from the sea to rivers to spawn. Unfortunately, the situation of rivers are not welcoming for hilsa as several power plants are the threat like Payra Thermal Power Plant, Patuakhali Thermal Power Plant, Barishal Coal-Fired Power Plant.  The major breeding grounds include Barishal, Chandpur and Bhola which will be monitored strictly. The Bangladesh Coast Guard and the fisheries department will work together to implement the declared ban of not catching hilsa fish. The question will be about the situation of the fishermans involved in fishing as their livelihood. For this the government will provide VGF food assistance to fishermen during the banning time period.  One of the hindrances of hilsa production, the several power plan...

বাংলা সাহিত্য ও ব্যাকরণ অংশ

HSC physics second paper chapter four

 Reverse arrangement 🙂 Go to the bottom and scroll up🙃

Hypothesis testing practice problems and answers

📘 Example: F-Test for Two Variances 🎯 Problem: Two factories produce the same type of product. A quality inspector wants to know if their product weight variances are different. The data: Factory A: Sample size Sample variance Factory B: Sample size Sample variance At a 5% significance level , test whether the variances are significantly different . ✅ Step 1: Set Hypotheses We are testing: (variances are equal) (variances are not equal) ✅ Step 2: Compute F-statistic Use the formula: F = \frac{\text{larger variance}}{\text{smaller variance}} = \frac{20}{10} = 2.00 Let: Numerator df = Denominator df = ✅ Step 3: Find Critical Values We use a two-tailed test at α = 0.05 → Each tail has 0.025. We need: Upper critical value Lower critical value From F-distribution tables: → so F_{0.025,14,11} = \frac{1}{3.21} \approx 0.311 ✅ Step 4: Decision Rule Reject if or Our F = 2.00 → Lies between 0.311 and 3.29 ✅ Step 5: Conclusion ...

Class lecture 01 for HSC