The table below shows the right ascensions of two stars at a location. Name of star Right ascension (in hours)
Star 1 5
Star 2 3

Which of these statements is correct about the stars?
Star 1 will rise two hours before Star 2.
Star 1 will rise three hours before Star 2.
Star 1 will cross the meridian four hours before Star 2.
Star 1 will cross the meridian seven hours before Star 2.

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