Choose all of the correct statements concerning acids and bases. HCl will turn blue litmus paper red a pH of 2 is a stronger acid than a pH of 5 the pH of NaOH is around 3 a substance with a pH of 9 will turn blue litmus paper red acids release hydrogen ions in solution litmus paper can be used to test the strength of an acid or base

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2