4. For a freely falling body, vertical velocity at 5th second is:
a) 39.2 ms-1
b) 49 ms -1
c) 19.6 ms-1
d) 94.9 ms-1

Photons with the highest energy have the longest period

Examine the drawing of a molecule. each ring represents an atom of nitrogen (n). what’s the chemical formula of this substance?

An airplane is flying with a velocity of 240 m/s at an angle of 30.0∘ with the horizontal, as the drawing shows. when the altitude of the plane is 2.4km, a flare is released from the plane. the flare hits the target on the ground. what is the angle θ?