A red wheel speeds up with tangential acceleration aaa at a distance rrr from its center. A blue wheel has a tangential acceleration of 2a2a2, a at a distance 4r4r4, r from its center. How does the angular acceleration of the red wheel \alpha_\text {red}α red alpha, start subscript, start text, r, e, d, end text, end subscript compare with the blue wheel \alpha_\text {blue}α blue alpha, start subscript, start text, b, l, u, e, end text, end subscript?

What are some properties of transverse waves?

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

Researchers conducted an experiment to identify the effects of three different hand sanitizers on the growth of bacteria. the researchers grew one type of bacteria in twenty-four identical covered petri dishes. then, they opened eighteen petri dishes and applied the three hand sanitizers to six petri dishes each. they left the remaining six petri dishes closed as a control group. when the researchers measured the growth of bacteria two days later, the six dishes that had no hand sanitizer showed the least amount of bacterial growth. the researchers concluded that not using any hand sanitizer would lead to the least bacterial growth. which statement best explains why the researchers’ conclusion was not justified? the experiment tested too many variables. the control group was not treated the same as the experimental group. the sample size of twenty-four petri dishes is not large enough. the single type of bacteria is not adequate to make any conclusions.