wooden ball lies in a vessel with water so that half of it is immersed in water.
With what force does the ball press on the bottom of the vessel if the mass of the ball is = 2 kg, the density of the tree is _д = 800 kg / m3, and the density of the water is _в = 1000 kg / m3?

When you push downward on a book at rest on a table, you feel an upward force. does this force depend on friction? defend your answer.

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Which best describes how fluids change as they travel through different portions of the convection currents? they change to solids at the outer portion of the convection currents. they change to solids at the inner portion of the convection currents. they become more dense at the outer portion of the convection currents. they become more dense at the inner portion of the convection currents