Aprojectile is fired with a velocity �⃗ at the entrance of a horizontal tunnel of length and height hh. determine the minimum value of the speed and the corresponding value of the angle thetatheta for which the projectile will reach at the other end of the tunnel just about touching the top of the tunnel (assume that this brief interaction between the particle and tunnel does not alter the path of the projectile in any significant way).

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:

current flows in a wire

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.

it's a b and