A 0.2 kg block of ice at 0°C is placed into a Styrofoam calorimeter cup with an unknown mass of water at 20°C. When thermal equilibrium is reached, the final temperature is measured to be 5°C. What was the mass of the water initially in the cup?​

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

What are chlorofluorocarbons and what impact do they have on the atmosphere?

At a certain instant after jumping from the airplane a, a skydiver b is in the position shown and has reached a terminal (constant) speed vb = 52 m/s. the airplane has the same constant speed va = 52 m/s, and after a period of level flight is just beginning to follow the circular path shown of radius ρa = 2330 m. (a) determine the velocity and acceleration of the airplane relative to the skydiver. (b) determine the time rate of change of the speed vr of the airplane and the radius of curvature ρr of its path, both as observed by the nonrotating skydiver.