Why do airplanes need to be pressurized for passenger safety when flying high in the atmosphere?

Which changes of state are characterized by having atoms that gain energy? Check all that apply melting sublimation freezing vaporization condensation depositoin

Explain the origin of all matter in the Universe

Centripetal force keeps an objectmoving in a circle and A. in a straight line. B. always pulls toward the center. C. pushes it out in space.

A tennis ball is hit when it is 1.30 meters above the court. The ball's velocity leaving the racket is 8.08 m/s horizontally, how far away does the ball land?

What is the direction of magnetic field lines inside any magnet? A.) they travel from north to south B.) they travel from south to north C.) they travel in a loop D.) they travel back and forth within the magnet E.

Steam enters an adiabatic turbine steadily at 3 mpa and 400°c and leaves at 50 kpa and 100°c. if the power output of the turbine is 2 mw, determine (a) the isentropic efficiency of the turbine and (b) the mass flow rate of the steam flowing through

StA A boat takes off from the dock at 2.5 m/s and speeds up at 4.2 m/s2 for 6.0 s. How far has the boat traveled? Round your answer to the nearest whole number.

Which inventor created a delivery system for electricity that was deemed safer than Thomas Edison's system? a. Henry Flagler b. George Proctor c. George Westinghouse d. Thomas DeSaille Tucker

Which is the most closely related to the color of an acid-base indicator when dipped into solution? A.) The hydronium ion concentration in the solution. B.) The total amount of solution present. C.) The number of water molecules in the solution. D.

If a cell is placed inside a solution that has a higher concentration of solute than on the inside of the cell, what can be said about the movement of water? a. Water will move out of the cell, causing it to swell. b.