The normal body temperature of a goat is 39.9 degree celcius, and that of an Australian spiny anteater is 22.2 degree celcius. Express these temperatures in degrees Fahrenheit.

Which part of the peripheral nervous system does Janet use to tie her shoe?

Some radioactive materials emit a type of radiation called alpha particles at high velocity.

(a) What is the kinetic energy in joules of an alpha particle with a mass of 6.6 X 10 $^{-27}$kg and a speed of 1.5 X 10 $^{7}$m/s? Express the number in scientific notation.

(b) Express the number and unit using an appropriate prefix.

The height of a horse is usually measured in hands instead of in feet, where 1 hand equals 1/3 ft (exactly).

(a) How tall in centimeters is a horse of 18.6 hands?

(b) What is the volume in cubic meters of a box measuring 6 X 2.5 X 15 hands?

The volume of water used for crop irrigation is measured in acrefeet, where 1 acre-foot is the amount of water needed to cover 1 acre of land to a depth of 1 ft.

(a) If there are 640 acres per square mile, how many cubic feet of water are in 1 acre-foot?

(b) How many acre-feet are in Lake Erie (total volume = 116 mi$^{3}$)?

Make a graph that shows the relationship between the mass and volume of aluminum samples of different sizes. Use the y-axis to plot mass and the x-axis to plot volume. What does the shape of the graph tell you about the density of aluminum?

$$\begin{matrix}\text{Block} & \text{Mass} & \text{Volume}\\\text{number} & \text{(g)} & \mathrm{(cm^{3})}\\\text{1} & \text{1.20} & \text{0.443}\\\text{2} & \text{3.59} & \text{1.33}\\\text{3} &\text{5.72} & \text{2.12}\\\text{4} & \text{12.4} & \text{4.60}\\\text{5} & \text{15.3} & \text{5.66}\\\text{6} & \text{19.4} & \text{7.17}\\\text{7} & \text{22.7} & \text{8.41}\\\text{8} & \text{24.1} & \text{8.94}\\\text{9} & \text{34.0} & \text{12.6}\\\text{10} & \text{36.4} & \text{13.5}\\\end{matrix}$$

Convert the following quantities into SI units with the correct number of significant figures:

(a) 5.4 in.

(b) 66.31 lb

(c ) 0.5521 gal

(d) 65 mi/h

(e) 978.3 yd$^{3}$

(f) 2.380 mi$^{2}$

The world record for the women’s outdoor 20,000-meter run, set in 2000 by Tegla Loroupe, is 1:05:26.6 (seconds are given to the nearest tenth). What was her average speed, expressed in miles per hour with the correct number of significant figures? (Assume that the race distance is accurate to 5 significant figures.)

Express the results of the following calculations with the correct number of significant figures:

(a) $\frac{3.41-0.23}{5.233} \times 0.205$

(b) $\frac{5.556 \times 2.3}{4.223-0.08}$

Express the results of the following calculations with the correct number of significant figures:

(a) 4.884 X 2.05

(b) 94.61 $\div$ 3.7

(c ) 3.7 $\div$ 94.61

(d) 5502.3 + 24 + 0.01

(e) 86.3 + 1.42 - 0.09

(f) 5.7 X 2.31

Round off the following quantities to the number of significant figures indicated in parentheses:

(a) 7.0001 kg (4)

(b) 1.605 km (3)

( c) 13.2151 g/cm$^{3}$ (3)

(d) 2,300,000.1 (7)

Round off the following quantities to the number of significant figures indicated in parentheses:

(a) 35,670.06 m (4, 6)

(b) 68.507 g (2, 3)

( c) 4.995 X 10$^{3}$ cm (3)

(d) 2.309 85 X 10$^{-4}$ kg (5)

You are beachcombing on summer vacation and find a silver bracelet. You take it to the jeweler and he tells you that it is silver plated and will give you $10 for it. You do not want to be swindled so you take the bracelet to your chemistry lab and find its mass on a balance (80.0 g). To measure the volume you place the bracelet in a graduated cylinder containing 10.0 mL of water at 20$\degree$C. The final volume in the graduated cylinder after the bracelet has been added is 17.61 mL. The density of silver at 20$\degree$Cis 10.5 g/cm$^{3}$and 1 cm$^{3}$ = 1 mL. What can you conclude about the identity of the metal in the bracelet?

Convert the following measurements from scientific notation to standard notation:

(a) 3.221 X 10$^{-3}$ mm

(b) 8.940 X 10$^{5}$ m

(c ) 1.350 82 X 10$^{-12}$ m3

(d) 6.4100 X 10$^{2}$ km