ଡଙ୍ଗା କାହିଁକି ପାଣିରେ ଭାସି ରହିଛି?

The first point "୧. ସମଗ୍ର ପ୍ରଶ୍ନର ଉତ୍ତର ଲେଖ।" is an instruction to answer the entire question paper, not a question itself. I will proceed with the first actual question, which is question number ୨ (2). ୨. ଡିଙ୍ଗା କାହିଁକି ପାଣିରେ ଭାସି ରହିଛି? (Why does the boat float on water?) Step 1: Identify the core principle. A boat floats due to the principle of buoyancy, which is explained by Archimedes' principle. Step 2: Explain the interaction with water. When a boat is placed in water, it displaces a certain volume of water. This displaced water creates an upward force on the boat, known as the buoyant force. Step 3: Relate buoyant force to the boat's weight. According to Archimedes' principle, the buoyant force acting on the boat is equal to the weight of the water it displaces. For the boat to float, this buoyant force must be equal to or greater than the total weight of the boat. Step 4: Consider density. Boats are designed so that their overall average density (including the air within their structure) is less than the density of water. This allows them to displace enough water to generate sufficient buoyant force to support their weight, causing them to float. ଡଙ୍ଗା ପାଣିରେ ଭାସିବାର ମୁଖ୍ୟ କାରଣ ହେଉଛି ଉତ୍ପ୍ଳବନ। ଯେତେବେଳେ ଡଙ୍ଗା ପାଣିରେ ରଖାଯାଏ, ଏହା କିଛି ପରିମାଣର ପାଣିକୁ ବିସ୍ଥାପିତ କରେ। ଆର୍କିମିଡିସ୍ ନୀତି ଅନୁଯାୟୀ, ଡଙ୍ଗା ଉପରେ କାର୍ଯ୍ୟ କରୁଥିବା ଉତ୍ପ୍ଳବନ ବଳ ବିସ୍ଥାପିତ ଜଳର ଓଜନ ସହିତ ସମାନ। ଯଦି ଏହି ଉତ୍ପ୍ଳବନ ବଳ ଡଙ୍ଗାର ଓଜନ ଠାରୁ ଅଧିକ କିମ୍ବା ସମାନ ହୁଏ, ତେବେ ଡଙ୍ଗାଟି ଭାସିବ। ଡଙ୍ଗାର ହାରାହାରି ଘନତା ଜଳର ଘନତା ଠାରୁ କମ୍ ଥିବାରୁ ଏହା ଭାସେ।