Physics

# Problems

PhysicsProblems

### 1.3The Language of Physics: Physical Quantities and Units

34.

A commemorative coin that sells for $40 is advertised to be plated with 15 mg of gold. Suppose gold is worth about$1,300 per ounce. Which of the following best represents the value of the gold in the coin?

1. $0.33 2.$0.69
3. $3.30 4.$6.90
35.
If a marathon runner runs $9.5 miles$ in one direction, $8.89 miles$ in another direction and $2.333 miles$ in a third direction, how much distance did the runner run? Be sure to report your answer using the proper number of significant figures.
1. $20$
2. $20.7$
3. $20.72$
4. $20.732$
36.
The speed limit on some interstate highways is roughly $80 km slash h$. What is this in meters per second? How many miles per hour is this?
1. $62 m slash s$, $27.8 mi slash h$
2. $22.2 m slash s$, $49.7 mi slash h$
3. $62 m slash s$, $2.78 mi slash h$
4. $2.78 m slash s$, $62 mi slash h$
37.
The length and width of a rectangular room are measured to be $3.955 plus-or-minus 0.005 m$ by $3.050 plus-or-minus 0.005 m$. Calculate the area of the room and its uncertainty in square meters.
1. $12.06 plus-or-minus 0.29 m squared$
2. $12.06 plus-or-minus 0.01 m squared$
3. $12.06 plus-or-minus 0.25 m squared$
4. $12.06 plus-or-minus 0.04 m squared$