Aroom in the lower level of a cruise ship has a 30-cmdiameter circular window. If the
midpoint of the window is 5 m below the water surface, determine the hydrostatic force
acting on the window, and the pressure center. Take the specific gravity of seawater to
be 1.025

What is the average speed of a car that travels 40 mph for 1 hour and 60 mph in another hour?

Aperson walks first at a constant speed of 4.89 m/s along a straight line from point a to point b and then back along the line from b to a at a constant speed of 2.95 m/s. what is the average speed over the entire trip?

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?