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Chapter 1: Problem 76

Write CGS unit and SI unit for given following physical quantities: (a) Area (b) Volume (c) Density (d) Velocity or Speed (e) Acceleration (f) Force (g) Weight (h) Pressure (i) Temperature (j) Energy

Short Answer

Expert verified
Answer: (a) Area: CGS - square centimeter (cm^2), SI - square meter (m^2) (b) Volume: CGS - cubic centimeter (cm^3), SI - cubic meter (m^3) (c) Density: CGS - grams per cubic centimeter (g/cm^3), SI - kilograms per cubic meter (kg/m^3) (d) Velocity or Speed: CGS - centimeter per second (cm/s), SI - meter per second (m/s) (e) Acceleration: CGS - centimeter per second squared (cm/s^2), SI - meter per second squared (m/s^2) (f) Force: CGS - dyne, SI - newton (N) (g) Weight: CGS - dyne, SI - newton (N) (h) Pressure: CGS - barye (Ba), SI - pascal (Pa) (i) Temperature: both CGS and SI - degrees Celsius (°C) and kelvin (K) (j) Energy: CGS - erg, SI - joule (J)

Step by step solution

01

(a) Area:

The CGS unit for area is square centimeter (cm^2), while the SI unit is square meter (m^2).
02

(b) Volume:

The CGS unit for volume is cubic centimeter (cm^3), while the SI unit is cubic meter (m^3).
03

(c) Density:

The CGS unit for density is grams per cubic centimeter (g/cm^3), while the SI unit is kilograms per cubic meter (kg/m^3).
04

(d) Velocity or Speed:

The CGS unit for velocity or speed is centimeter per second (cm/s), while the SI unit is meter per second (m/s).
05

(e) Acceleration:

The CGS unit for acceleration is centimeter per second squared (cm/s^2), while the SI unit is meter per second squared (m/s^2).
06

(f) Force:

The CGS unit for force is dyne, where 1 dyne = 1 g * cm/s^2, while the SI unit is newton (N), where 1 N = 1 kg * m/s^2.
07

(g) Weight:

Weight is a force, so it shares the same units with force. The CGS unit for weight is dyne and the SI unit is newton (N).
08

(h) Pressure:

The CGS unit for pressure is barye (Ba), where 1 Ba = 1 dyne/cm^2, while the SI unit is pascal (Pa), where 1 Pa = 1 N/m^2.
09

(i) Temperature:

Both CGS and SI systems use the same units for temperature - degrees Celsius (°C) and kelvin (K).
10

(j) Energy:

The CGS unit for energy is erg, where 1 erg = 1 dyne * cm, while the SI unit is joule (J), where 1 J = 1 N * m.

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