A newly discovered planet has a radius twice as large as earth's and a mass five times as large. Part A What is the free-fall acceleration on its surface? Express your answer to two significant figures and include the appropriate units. Value Units Specify the units of your answer. Review a list of acceptable units No credit lost. Try again. Submit Previous Answers Request Answer ? Provide Feedback Two meteoroids are heading for earth. Their speeds as they cross the moon's orbit are 1.0 km/s Lapis your new appropriate w 11.1 km Previous Answers Correct Correct answer is shown. Your answer 11142.49(-11.142) was either rounded differently required for this part Part B The second misses the earth by 5000 km. What is its speed at its closest point? Express your answer with the appropriate units. Submit A 8131.93 m S Previous Answers Request Answer ? X Incorrect; Try Again: 2 attempts remaining Review your calculations and make sure you round to 3 significant figures in the last step