Two blocks, A and B, have the same size and shape. Block A floats in water, but block B sinks in water
Which block has the larger buoyant force on it?
1.Block A has the larger buoyant force on it.
2.Block B has the larger buoyant force on it.
3.Neither; they have the same buoyant force on them.
4.Impossible to determine from the given information.
2
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The figure represents the velocity of a particle as it travels along the x-axis. At what value (or values) of t is the instantaneous acceleration equal to zero?
A) t = 0 B) t = 0.5 s and t = 2 s C) t = 1 s
A puddle holds 150 g of water. If 0.75 g of water evaporates from the surface, what is the approximate temperature change of the remaining water? (Lv = 540 cal/g)
a. –2.7°C c. -0.27°C b. +2.7°C d. +0.27°C
What is the most likely outcome after the collision between two spiral galaxies?
A. the destruction of most of their stars B. formation of a larger galaxy C. enhanced formation of spiral arms D. All of these choices are correct.
A puck moves on a horizontal air table. It is attached to a string that passes through a hole in the center of the table
As the puck rotates about the hole, the string is pulled downward very slowly and shortens the radius of rotation, so the puck gradually spirals in towards the center. What happens to the puck's angular speed?