We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.

+0

# Help Please

0
194
2

Use to Dimensional Analysis to Solve:

1. 2500 m = _____ km

2. 7.1 hr = _____ min

3. 460 µL = _____ L

4.83 kg = _____ g

Aug 27, 2018

### 2+0 Answers

#1
+2

Problem 1: We have K H D B D C M(Kilo, Hecto, Deca, Basic, Deci, Centi, and Mili)

To get from meters to kilometers, we have to move the decimal point $$3$$ points to the left. This will give us $$2.5$$ km.

Problem 2: There are $$60$$ minutes in an hour, and there are $$7.1$$ hours, so we need to multiply $$60 \times 7.1 = 426$$ min.

Problem 3: To convert microliters to liters we have to move the decimal point $$6$$ times to the left. This gives us $$0.00046$$ L.

Problem 4: To convert kilograms to grams, we do the exact opposite of what we did in the first problem. We move the decimal point $$3$$ times to the right. This will give us $$4830$$ g.

- Daisy

Aug 27, 2018
#2
+2

Using dimensional analysis

1.  2500 m   x   1 km  / 1000m     [cancel  m ] =  [2500 * 1  /1000]km   =  2.5 km

2. 7.1 hr  x  60min / 1 hr   [cancel hr ] =  [7.1 * 60 / 1 ] min  = 426 min

3 . 460 microliters x  1 L  / 1000000 microliters   [ cancel microliters ] =

[ 460 * 1 / 1000000]  mkicroliters  = .00046  L

4.  4.83 kg  x   1000g / 1 kg   [ cancel kg] =  4.83 x 1000/1 =  4830  g   Aug 27, 2018