Logout Open In App
Open In App
Warning: foreach() argument must be of type array|object, bool given in /var/www/html/web/app/themes/studypress-core-theme/template-parts/header/mobile-offcanvas.php on line 20

Chapter 1: Q4. (page 17)

For an answer to be complete, the units need to be specified. Why?

Short Answer

Expert verified

It is important to specify the units to complete an answer to improve accuracy and give clearer meaning.

Step by step solution

01

Step 1. Defining magnitude and unit

It is important to specify the units in an answer because it adds more meaning. The number, along with the unit, is called magnitude.

A unit is used to compare the magnitudes of quantities of similar nature. It acts as a reference for measurements.

02

Step 2. Example showing the importance of units

The value of distance only in figure, say 5, does not convey a clear meaning. After adding the unit meter, it becomes five meters, which conveys distance accurately.

The value of time as only ten does not convey a clear meaning. After adding the unit seconds, it becomes ten seconds, which conveys time accurately.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Express the following using the prefixes of Table 1–4:

(a)1×106volts

(b)2×10-6meters

(c)6×103days

(d)18×102bucks

(e)7×10-7seconds

How many significant figures does the number 0.0078 have?

(a) 1.(b) 2.(c) 3.(d) 4.

What is the area and its approximate uncertainty of a circle of the radius of3.1×104cm?

Write the following numbers in powers of 10 notation: (a) 1.156, (b) 21.8, (c) 0.0068, (d) 328.65, (e) 0.219, and (f) 444.

The smallest meaningful measure of length is called the Planck length, and it is defined in terms of three fundamental constants in nature: the speed of light , the gravitational constant G=6.67×10-11 m3×kg-1×s-2, and Planck’s constant h=6.63×10-34 m2×kg×s-1. The Planck length ℓpis given by the following combination of these three constants:

ℓp=Ghc3

Show that the dimensions ofℓpare length [L], and find the order of magnitude ofℓp. [Recent theories (Chapters 32 and 33) suggest that the smallest particles (quarks, leptons) are ‘strings’ with lengths on the order of the Planck length,10-35 m. These theories also suggest that the ‘Big Bang’, with which the universe is believed to have begun, started from an initial size on the order of the Planck length.]
See all solutions

Recommended explanations on Physics Textbooks

Physics of Motion

Read Explanation

Magnetism and Electromagnetic Induction

Read Explanation

Atoms and Radioactivity

Read Explanation

Oscillations

Read Explanation

Translational Dynamics

Read Explanation

Wave Optics

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free