Question

6.1 seconds contain this many picoseconds.
6.1×10^{12}
6.1×10^{-12}
6.1×10^{9}
6.1×10^{-9}
6.1×10^{15}
question 2
1 pts
a student measures a pencil and determines that is has a length of 11.4 cm. what is the length of this pencil in inches?
4.49 inches
11.4 inches
30.0 inches
5.70 inches
question 3
1 pts
what is the density of a 600. ml liquid sample that weighs 450. grams?
0.750 g/ml
1.33 g/ml
270 g/ml
0.370 g/ml

Explanation:

Question 1

Step1: Recall conversion factor

1 second = $10^{12}$ picoseconds.

Step2: Calculate picoseconds in 6.1 seconds

$6.1\times10^{12}$ picoseconds.

Step1: Recall conversion factor

1 inch = 2.54 cm.

Step2: Convert cm to inches

$11.4\div2.54\approx4.49$ inches.

Step1: Recall density formula

Density $
ho=\frac{m}{V}$, where $m$ is mass and $V$ is volume.

Step2: Substitute values

$
ho=\frac{450}{600}= 0.750$ g/mL.

Answer:

$6.1\times10^{12}$ picoseconds

Question 2