Under what circumstances could you levitate a bit of paper or a crumb and  raise it to be almost stable above the surface?     Small pieces of cookie crumbs could float above the surface until the comb moved.     There was no stable example.  The materials either rested on the surface or they flew up and accelerated.     Everything I tried floated and did not reach the comb, but would rise above the surface.     Larger pieces of paper could

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A 1400 kg hippo is completely submerged, standing on the bottom of a lake. What is the approximate value of the upward normal force on the hippo?

Dndgin9 What is the weight of a cube with density 100 g/cm^3 and sides 0.2 m mo2m iN 2 mg Piro 800 N 80 N 8000 N 8 N

while visitin a winery, you observe  wine shooting out of a hole at the bottom of a barrel.  The hole is .8 m below the top surface of wine.  Determine speed of wine leaving barrel's hole.  What would happen if there was a sealed lid on top of barrel? Why?

A hippopotamus is napping under water with only the end of its snoot above the surface. It has a mass of 1100 kg and a volume of 1.0 m3. How much force in Newtons does the hippo exert on the ground? (fresh water, density 1g/cm3)? A. 10 N B. 100 N C. 1,000 N D. 1,100 N E. 10,000 N

A person has placed a large, open-topped container 10m high. They fill the container with water to the top. With a sharp needle, they poke a tiny hole near the bottom of the container. The water sprays horizontally out of the hole, arcs through the air like a projectile, and splashes 15m away. How high above the hole is the top of the container?

A 16 cm diameter Styrofoam ball (p = 0.3 g/cm³) is released from the bottom of a tank filled with an unknown liquid. If the terminal speed of the ball is 1.66 m/s, what is the density of the liquid? The drag coefficient of the ball is 0.50. O 0.23 g/cm3 O 0.45 g/cm3 O 0.88 g/cm3 O 0.18 g/cm3

A cannon is sitting in a boat which is floating in a small pond. You attach one end of a chain to the boat and the other end of the chain to the cannon and throw the cannon out of the boat. The cannon hangs from the boat without touching the bottom of the pond. The water level on the sides of the lake when the cannon is hanging from the boat is ___________ when the cannon was inside the boat. A. exactly the same as. B. a little lower than C. a little higher than

The conservation of momentum, conservation of angular momentum, and pascals principle are major topics in physics. What do these concepts have in common? Explain how they are similar.