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(a) The maximum sodium intake for a person on a 2000 calorie diet should be 2400 mg/day. How many grams of sodium is this per day? (b) The recommended daily allowance (RDA) of the trace element chromium is 120$\mu g /$ day. Express this dose inconsidered safe (although the safety of higher doses has not yet been established. Express this intake in grams per day. (d) The electrical resistance of the human body is approximately 1500 ohms when it is dry. Express this resistance in kilohms.(e) An electrical current of about 0.020 amp can cause muscular spasms so that a person cannot, for example, let go of a wire with that amount of current. Express this current in milliamps.

(a) 2.4$g$(b) 1.2$* 10^{-4} g$c) 0.5$g$d) 1.5$k \Omega$e) 20$m A$

Physics 101 Mechanics

Chapter 1

Models, Measurements, and Vectors

Physics Basics

Muhammad S.

December 14, 2021

Problem#1

Cornell University

University of Winnipeg

McMaster University

Lectures

04:16

In mathematics, a proof is a sequence of statements given to explain how a conclusion is derived from premises known or assumed to be true. The proof attempts to demonstrate that the conclusion is a logical consequence of the premises, and is one of the most important goals of mathematics.

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In mathematics, algebra is one of the broad parts of mathematics, together with number theory, geometry and analysis. In its most general form, algebra is the study of mathematical symbols and the rules for manipulating these symbols; it is a unifying thread of almost all of mathematics.

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(a) The maximum sodium int…

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one problem. So I recommended sodium intake for someone with two 1,000 calories a day is 24 100 mil Agree? We want to multiply this by what to give in grams per day. Okay, so we need the converted. We have millions for daily what they get to great yesterday. So you want milligrams on bar and 10 grams on top. So these will cancel. So for one gram, there is 1,000 milligrams in it. So now we can do this Multiplication when you get to point or grams per day. Perfect part B. We have 120 micrograms per day and we want to look by this. Buy something to get grams per day again. So we want out of this by creams on tough liquid greens on bottoms of these cancel. So for a one gram, there's 10 to the six micrograms and it so whatever you do, it's multiplication. We see that this is 1.2 terms to living for crane spreading. Moving on to see we have 500 no grooms per day. We want to cover Mr Du Inte grins for Dae So the one grand per 1,000 there are rooms. This is going to be Teo five. Perfect. We're going to D now. We're left. We start out with 1,500 owns, and we want to get this to kill homes. So you call something, You know what moves on the swings? We were only to the cancer out, so that's gotta be on Barter killer owns on top. So for one of your own, there's 1,000 always in it. So if we do's multiplication, we're left with 1.5. Killer owns final ing for E. We start out with 0.2 amps and you want to get this two millenniums so we multiply this by our conversion factor. This pull some number of military arms. We want to figure out how many milligrams are in one year. The one has 1,000 electricity, so we know that this is equal to 20 times

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