Supose the frequencies u  ear can respond range over a factor of 103, from around 20 Hz to 20 kHz. Suppose the speedometer measured speeds differing by the same factor of 103, and the greatest speed it reads is 90.0 mph . What is  the slowest nonzero speed it could read, in  mi/h?

The frequency of a sound wave is measured in hertz (Hz). The hertz is identical to per second, that is 1 Hz = 1 s−1. The intensity of a sound wave can be expressed as the power per unit area or, in SI units, W/m2. The intensity of sound is also often commonly quoted using the unit decibel or dB. The distance, d, that a sound wave propagates through a material in a time, t, is given by d = vt, where v is the speed of sound in the material.

Tectonic plates are large segments of the earth's crust that move slowly. Suppose one such plate has an average speed of 3.0 cm per year. (a) What distance does it move in 12 seconds at this speed? (b) What is its speed in miles per million years?

A car takes time t=(2.5±0.1) s to travel a distance Ax=(0.922±0.001) m. VWhat is the relative uncertainty for the time?

A Ship is traveling at a speed of 42 m/s. (a) What is its speed in kilometers per hour? (b) Is itexceeding the 80 km/h speed limit?

given that A+2B = x1j +y1j and 2A-B = x2i + y2j what is A?

Which are the primary and secondary quantities in MLtT, FL(T and FMLtT system of units?

Harvard Bridge, which connects MIT with its fraternities across the Charles River, has a length of 364.4 Smoots plus one ear. The units of one Smoot is based on the length of Oliver Reed Smoot, Jr., class of 1962, who was carried or dragged length by length across the bridge so that other pledge members of the Lambda Chi Alpha fraternity could mark off (with paint) 1-Smoot lengths along the bridge. The marks have been repainted biannually by fraternity pledges since the initial measurement, usually during times of traffic congestion so that the police could not easily interfere. (Presumably, the police were originally upset because a Smoot is not an SI base units, but these days they seem to have accepted the units.) The figure shows three parallel paths, measured in Smoots (S), Willies (W), and Zeldas (Z). What is the length of 33.0 Smoots in (a) Willies and (b) Zeldas? 32 212 258 60 216 (a) Number: i Unit: (b) Number: i Unit:

(Please refer to Fig. 1) W = FAx (Equation 1) F = qE (Equation 2) APEelec = -W (Equation 3) Substituting Eq. 1 in Eq. 3, APE elec Then subs. Eq. 2 in Eq. 4, 4. What does q means in the derived equation? = -FAx (Equation 4) APE etec = -qEAx (Eq. 2.1) Which is what we need to derive.

A car speedometer has a 6% uncertainty. What is the range of possible speeds when it reads 100 km/h?