(Neglecting any water or air resistance) A waterfall is located 55 m downstream from where a boat is launched. If the speed of the river is 4 m/s, then what minimum boat speed is required to cross the 150m wide river before falling over the falls? What angle does the boat's path make with the shore? Assume constant speeds for the current and the boat.

Atriangle with equal sides of length 10 cm has -2.5-nc charged objects at each corner. part a determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. determine the direction of the electrical force exerted on the object at the top corner due to the two objects at the horizontal base of the triangle. horizontally rightward vertically downward vertically upward horizontally leftward

The largest observatory complex in the world is on mauna kea, the tallest mountain on earth. what are some factors astronomers consider when selecting an observatory site? don’t forget practical ones. should astronomers, for example, consider building an observatory on denali (mount mckinley) or mount everest?

How does an insulator stop the flow of an electric current? insulators convert electric energy to other forms of energy