Clickers1

Clickers1 - 1. What happens with the scale reading after...

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1. What happens with the scale reading after you immerse an object into the water? 1. Scale reading will increase 2. Scale reading will decrease 3. Scale reading will remain constant. 0.00 kg M
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Answer 1: Scale reading will increase by the value of buoyant force. When we immerse the block into the water, there is a buoyant force from the water to the block. Accordingly, when two bodies interact, there is an equal downward force from the block acting on the water.
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2. A water flows through a horizontal pipe of the shape as shown. Where is the water pressure larger? 1. From the left 2. From the right 3. In the middle 4. The same everywhere
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Answer 2. According to Bernoulli’s equation p+ ρ v 2 /2+ ρ gh=const, hence the larger the speed the smaller the pressure (at a constant height). It is also clear that since the water slows down while flowing from the right to the left, it is the force due to pressure difference which is responsible for it.
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Clickers1 - 1. What happens with the scale reading after...

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