20. A ball of mass 5.0 kg is tied to the end of a 75-cm length of string. The ball and string are swung in a circle in a vertical plane at constant speed y, which is the minimum speed necessary to keep the string taut at all times. The center of the circle is a distance h = 190 cm above the floor.
Suddenly, the string is released at the instant the ball is at point , located half way from the top to the bottom on the ascending arc. After what span of time does the ball hit the floor?
75 cm
Q
O 0.96
O 0.51
O 0.385
O 0.45 s

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

What are igneous intrusions and extrusions

Calculate the capacitance of a system that stores 2.0 x 10^-10c of charge at 100.0 v. use c=q/v. a. 2.0 x 10^-12 f b. 2.0 x 10^-8 f c. 5.0 x 10^11 f d. 5.0 x 10^7 f