whn a body hanging frm a spring balance is immersed in water it floats in water just below the surface of water & shows 100g loss in its weight

1-wht is thw weight of body in water?
2-wht is thw weight of body in air
3-wht is upthrust on the body?
4-wht is the vol. of body?
given-acc. due to gravity=10m/s,vol. of 1gm of water=1mL

density of water = 1 gram/cm^3

1. weight in water is 0

2.volume = 100 cm^3 because it displaced 100 grams of water
Therefore if neutrally buoyant it weights 100 grams in air.

3. Buoyant force = 100 grams . That was given.

4. volume = 100 cm^2 as we said

To find the answers to the questions, we'll use the information given and apply relevant concepts. Let's go through each question one by one:

1. What is the weight of the body in water?
When an object is immersed in a fluid, it experiences a buoyant force acting opposite to the force of gravity. This buoyant force reduces the effective weight of the object. In this case, the body floats just below the surface of the water, indicating that the buoyant force is equal to the weight of the body in water. Therefore, the weight of the body in water is 100g (as given).

2. What is the weight of the body in air?
The weight of an object in air is its actual weight without any buoyant force acting on it. Since we know that the body loses 100g of weight when immersed in water, the weight of the body in air would be 100g more than its weight in water. Hence, the weight of the body in air is 100g + 100g = 200g.

3. What is the upthrust on the body?
The upthrust (or buoyant force) is the force exerted by a fluid on an immersed object. It is equal to the weight of the fluid displaced by the object. In this case, when the body is immersed in water and floats, its weight loss of 100g is caused by the upthrust acting on it. Therefore, the upthrust on the body is 100g.

4. What is the volume of the body?
To calculate the volume of the body, we can use the fact that the weight loss of the body in water is equal to the weight of the water it displaces. Since 1g of water occupies 1mL of volume (as given), the weight loss of 100g corresponds to 100mL of water displaced. Thus, the volume of the body is 100mL.

In summary:
1. Weight of the body in water = 100g
2. Weight of the body in air = 200g
3. Upthrust on the body = 100g
4. Volume of the body = 100mL