A toy cannon uses a spring to project a 5.30g -soft rubber ball. The spring is originally compressed by a 5.00 cm and has aforce constant of 8.00N/m. when the cannon is fired, the ball moves15.o cm through the horizontal barrel of the cannon and thebarrel exerts a constant friction force of 0.032 N of the ball. a) with what speed does the projectile leave the barrel of the cannon?b) at what point does the ball have max speed? c) What is the maximum speed.

1. what is the relationship between wavelength and the penetrating power of an electromagnetic wave? a) the penetrating power has no relationship to the wavelength. b) the penetrating power increases as the wavelength increases. c) the penetrating power decreases as the wavelength increases. d) the penetrating power decreases as the wavelength decreases. 2. as ice melts and turns into water, the speed of sound through the material would most likely do what? justify your answer. a) the speed would not change because the material is always water. b) the speed of sound would increase because the density of water is less than that of ice. c) the speed of sound would increase because energy is added to ice in order to make it melt. d) the speed of sound would decrease because sound travels faster through solids than liquids. 3.which of these waves need a medium to travel through? a) sound b) x-rays c) infrared rays d) visible light

You notice the birds sitting on the electrical wires which of the following explain why the birds don't get shocked

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