Aflattened combination of matter containing stars, gas, and dust in a spiral galaxy can be identified as: a. a galaxy b. a disk c. an elliptical galaxy d. gravitation lensing

What does si stand for,when referring to a system of measurement

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.

In the united states, tornadoes generally occur because of the freezing of ocean water underwater earthquakes meeting of cool and warm air masses shifting of warm and cool ocean currents