You are the science officer on a visit to a distant solar system. prior to landing on a planet you measure its diameter to be 1.8 * 107 m and its rotation period to be 22.3 hours. you have previously determined that the planet orbits 2.2 * 1011 m from its star with a period of 402 earth days. once on the surface you find that the free-fall acceleration is 12.2 m/s2. what is the mass of (a) the planet and (b) the star?

Apossible explanation for a set of facts that can be tested by further investigation is called

Mass (kg) force (n) 5 25 10 50 15 75 20 100 a student was trying to find the relationship between mass and force. he placed four different masses on a table and pulled them using a spring scale. the table shows the different masses used in the experiment and the force required to pull each mass. the student concluded that more force was required to pull heavier objects. what comment would you make regarding his conclusion? a) no clear relation can be observed between mass and force from the data. b) there is a direct proportion between the mass and force listed in the table. c) gravity should have been taken into account while performing the experiment. d) there is an inverse proportion between the mass and force listed in the table.

Awind turbine is rotating counterclockwise at 0.5 rev/s and slows to a stop in 10 s. its blades are 20 m in length. (a) what is the angular acceleration of the turbine? (b) what is the centripetal acceleration of the tip of the blades at t=0s? (c) what is the magnitude and direction of the total linear acceleration of the tip of the blades at t=0s?