The solar system moves at the speed of 828,000 km/h. Tara writes the following steps to calculate this speed in decameters/second (dm/s). [1 km = 100 dm] Step 1: Divide 828,000 by 100. Step 2: Divide the result obtained in step 1 by 60. Step 3: Divide the result obtained in step 2 by 60. Step 4: Write the number obtained in step 3 with the unit dm/s. Which step is incorrect in the conversion?

Question

Chemistry

Dulce Faulkner

9 September, 19:06

The solar system moves at the speed of 828,000 km/h. Tara writes the following steps to calculate this speed in decameters/second (dm/s). [1 km = 100 dm] Step 1: Divide 828,000 by 100. Step 2: Divide the result obtained in step 1 by 60. Step 3: Divide the result obtained in step 2 by 60. Step 4: Write the number obtained in step 3 with the unit dm/s. Which step is incorrect in the conversion?

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Answers (1)

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Hadassah Duarte · Answer 1

The correct answer is Step 1. Step 1: Divide 828,000 by 100 is incorrect.

Since Tara wants to convert km to dm, she should multiply by 100.

Conversion factor: 1 km = 100 dm

So the correct step would be as follows:

828,000 km/h x (100 dm/1 km) = 82,800,000 dm/hr