1. a partially filled balloon that has helium in it is released off the top of a 400m building. because of the helium, the acceleration due to gravity is decreased to 2.5 m/s2. how long does it take for the balloon to reach the ground ?
2. a rubber ball travelling at 10 m/s for 4 seconds at 450 north of east collides with a wall. the ball reflects off the wall at the same speed and continues to move for 3 seconds. what is the displacement of the ball?

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

happy to

pls mark as brainliest.

cell differentiation  is how generic embryonic  cells  become specialized  cells. this occurs  through a process called gene expression. gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a  cell  functions.

explanation:

volts times amps 6 x 0.5 3w

an electric circuit