# College Physics with Mastering Physics

Physics & Astronomy

## Quiz 1 :Measurement and Problem Solving

Question Type
A sailor tells you that if his ship is traveling at 25 knots (nautical miles per hour), it is moving faster than the 25 mi/h your car travels. How can that be
Free
Essay

The conversion formula of nautical miles to miles to solve this problem is as follows:
The speed of the ship is 25 nautical miles per hour.
Now, convert this unit into miles per hour.
Thus, in terms of miles/hour, the speed of the ship is 28.75 mi/h and this speed is greater than the speed of the car which is moving at 25 mi/h.
Hence, the statement of the sailor is true stating that his ship moving with speed 25 nautical miles per hour is greater than the car moving with speed 25 mi/h.

Tags
Choose question tag
Explain why a metric ton is equivalent to 1000 kg.
Free
Essay

The metric ton is not the unit of weight and is for the unit of mas. It is defined as the mass of 1.0 cubic meter of water.
One cubic centimetre is equal to one gram.
Hence the 1.0 metric ton is equal to 1000 kg.

Tags
Choose question tag
What replaced the original definition of the second and why Is the replacement still used
Free
Essay

A second is a basic time unit based in SI units.
A solar day is not the interval of time that elapses between two successive crossings of the same longitude line (meridian) by the Sun. A second was fixed as 1/86400 of this apparent solar day (1 day = 24h =1440min =86400s).
The mean solar day replaces the original second definition.
The mean solar day is the time which is calculated based on the crossing of sun across the meridian. This is the calculation of time with respect the position of sun in the sky. The mean solar day is defined as the period where the earth makes the rotation on the axis of earth. This is equal to 24 hours.
This replacement is not used now.
These are now replaced by atomic clocks. Because, 1 second is defined as the 9,192,631,770 cycles of a Cesium - 133 atomic clock.

Tags
Choose question tag
Give a couple of major differences between the SI and the British system.
Essay
Tags
Choose question tag
Why are there not more SI base emits
Essay
Tags
Choose question tag
Convert the following: (a) 40 000 000 bytes to MB, (b) 0.5722 mL to L, (c) 2.684 m to cm, and (d) 5 500 bucks to kilobucks.
Essay
Tags
Choose question tag
Why is weight not a base quantity
Essay
Tags
Choose question tag
If a fellow student tells you he saw a 3-cm-long ladybug, would you believe him How about another student saying she caught a 10-kg salmon
Essay
Tags
Choose question tag
Which of the following is the SI base emit for mass: pound, (b) gram, (c) kilogram, or (d) ton
Tags
Choose question tag
How many base units are there in the SI: (a) 3, (b) 5, (c) 7, or (d) 9
Tags
Choose question tag
(a) What volume in liters is a cube 20 cm on a side (b) If the cube is filled with water, what is the mass of the water
Essay
Tags
Choose question tag
The metric system is a decimal (base-10) system, and the British system is, in part, a duodecimal (base-12) system. Discuss the ramifications if our monetary system had a duodecimal base. What would be the possible values of our coins if this were the case
Essay
Tags
Choose question tag
Explain why 1 mL is equivalent to 1 cm 3.
Essay
Tags
Choose question tag
Which of the following is not related to a volume of water: (a) kilogram, (b) pound, (c) gram, or (d) tonne
Tags
Choose question tag
The prefix giga - means (a) 10 9 , (b) 10 9 , (c) 10 6 , (d) 10 6.
Tags
Choose question tag
The only SI standard represented by material standard or artifact is the (a) meter, (b) kilogram, (c) second, (d) electric charge.
Tags
Choose question tag
What size cube (in centimeters) would have a volume equal to that of a quart
Essay
Tags
Choose question tag
The prefix micro - means (a) 10 6 , (b) 10 6 , (c) 10 3 , (d) 10 3.