How do we determine the amount of dark matter in elliptical galaxies?

Evaporates can provide an ideal speed racing surface. True or False

If you can run 100 meters in 20 seconds, what is your speed?

When would potential energy be the greatest: at the top of a river with a steeper slope or gentle slope?

A pebble is dropped from a cliff. Neglecting air resistance, if the rock falls for 4 seconds. How fast is it moving?

A sealed pressure cooker allows steam to escape only through an opening in the lid. a separate metal object, called a petcock, sits on top of the opening and prevents steam from leaving until the pressure within the cooker overcomes the weight of

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.