During convection of air currents,

a. all air rises.

b. cool air sinks.

c. warm air sinks.

d. air is cooled by a heat source.

Which scenario represents the weakest force? (Assume particles in all scenarios are the same distance apart.) Protons and neutrons are held together inside the nucleus. Two particles are attracted to one another by static electricity.

What about the atomic model shown below was shown incorrect?

What force is necessary to accelerate a 70kg object at a rate of 4.2m/s squared

Which best describes a difference between electric current and static electricity

A supersonic jet is 3,600 kilometers east of U. S. airspace and has been flying for 3 hours. If the jet flies at a constant velocity of 2,400 kilometers per hour to the west, how much time will it take the jet to reach U. S.

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.