A base ball is through with an initial velocity of 1/2m/s that makes on angle of 53 degree the horizontal (take g=10m/s square) a. The time required to reach maximum hight?
b. The time for with the stays in air?
c. The maximum hight reached by the ball?
d. the hight of the ball after 4second?
e. The vertical & Horizontal components of its velocity just after 4second?
f. The magnitude of its velocity b just after 4second?
g. The range of projection?

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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