A boy who is 1.5 meters tall is standing 15 meters away from a 6.5 meter wall. He throws a ball at a 45 degree angle. gravity is 10m/s2 with no air resistance. Find the minimum velocity needed in order for the ball to reach the wall. I dont know what formulas to use since im not given the time

Aplane flies directly between two cities, a and b, which are separated by . from a to b, the plane flies into a headwind. on the return trip from b to a, the wind velocity is unchanged. the trip from b to a takes less than the trip from a to b. what is the airspeed of the plane, assuming it is the same in both directions

Imagine you are standing in the antarctic during the southern hemisphere summer. the sky is clear and blue. there are no clouds in the sky. your shadow is cast on the icy ground. what is the color of the shadow?

As microwave light travels through a liquid, it moves at a speed of 2.2 x 108 m/s. if the frequency of this light wave is 1.1 x 108 hz, what is the wavelength of this microwave?