Please help with C. I know my calculations are correct however, it keeps telling

Question

Please help with C. I know my calculations are correct however, it keeps telling me my rounding is incorrect

Problem 27.42 An electron has a de Broglie wavelength A 5.3x10 10 m h 6.626 x 10 34 J. s e 1.602 x 10 19 C, me 9.109 x 10 31 kg. Part A What is its momentum? Express your answer to two significant figures and include the appropriate units. kg m 1.25x10-24 My Answers Give Up Submit Correct Part B What is its speed? Express your answer to two significant figures and include the appropriate units. 1.4x10 Subm My Answers. Give Up Correct Part C What voltage was needed to accelerate it from rest to this speed? Express your answer to two significant figures and include the appropriate units. 5.57 V Submit My Answers Give Up incorrect; Try Again; 5 attempts remaining; no points deducted Not quite. Check through your calculations; you may have made a rounding error or used the wrong number of significant figures.

Explanation / Answer

Using

V = KE/q = 5.572297

Rounding off to two significant figures

Answer will be 5.6 V

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