Abowling ball of mass m = 1.1 kg is launched from a spring compressed by a distance d = 0.27 m at an angle of θ = 41° measured from the horizontal. it is observed that the ball reaches a maximum height of h = 3.9 m, measured from the initial position of the ball. let the gravitational potential energy be zero at the initial height of the bowling ball part (a) what is the spring constant k, in newtons per meter? part (b) calculate the speed of the ball, vo in m/s, just after the launch.

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.

What structural formula represents 4 electrons shared between two atoms?

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