Afriend tosses a baseball out of his second floor window with initial velocity of 4.3m/s(42degrees below the horizontal). the ball starts from a height of 3.9m and you catch the ball 1.4m above the ground.
a) calc the time the ball is in the air (ans. 0.48s)
b)determine your horisontal distance from window (ans. 1.5 m)
c)calc the speed of ball as you catch it (ans: 8.2m/s)

i dont get what 42 m below the horizontal is, can someone give me direction on how to do this?

Abatter hits the baseball a with an initial velocity of v0 = 110 ft/sec directly toward fielder b at an angle of 23° to the horizontal; the initial position of the ball is 2.2 ft above ground level. fielder b requires 0.44 sec to judge where the ball should be caught and begins moving to that position with constant speed. because of great experience, fielder b chooses his running speed so that he arrives at the “catch position” simultaneously with the baseball. the catch position is the field location at which the ball altitude is 8.4 ft. determine the velocity of the ball relative to the fielder at the instant the catch is made.

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.

When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.