ok...asking this again, what is a fossil fern providing evidence the continents once were joined (science)

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

Which is the best for showing percentages of different types of cars sold(gas hybrid , electric , other ) in the united states ?

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