College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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Can you explain please in this situation I am not sure since this number have an exponent how should I count significant figures in it how it works in this case
Transcribed Image Text:How many significant figures are proper in the results of the following calculation: 18.72
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We have to identity number of significant figures in 18.72 .
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- 4 please need help, keep in mind the 7 basic units and watch the sig figs. Please write in standard form need to see all the numbers in solution thank you so mucharrow_forwardPractice) a. To convert feet (ft) to meters (m), the number of feet should be multiplied by which of the following conversion factors? i. 1 m/3.28 ft ii. 3.28 ft/1 m b. To convert sq.in to sq.ft, the number of sq.in should be multiplied by which of the following conversion factors? i. 144 sq.in/1 sq.ft ii. 1 sq.ft/144 sq.in c. To convert sq.yd to sq.ft, the number of sq.yd should be multiplied by which of the following conversion factors? i. 1 sq.yd/9 sq.ft ii. 9 sq.ft/1 sq.yd 3. (Practice) Determine the final units of the following expression: 9.8m/s2 ×100cm/1m×1in/2.54cm×1ft/12in 4. (Practice) a. Determine the conversion factors that can be used to convert miles per gallon (mpg = mi/gal) to kilometers per liter (km/liter), given that 1 liter = 0.22 gallons and 1 kilometer = 0.6214 miles. b. Using the conversion factors you determined in Exercise 4a, convert 25 mpg into km/liter. 5. (Automotive) a. An automobile engine’s performance can be determined by monitoring its rotations per…arrow_forwardCan i get help with these problems pleasearrow_forward
- a) Acceleration is described as space divided by time squared. Determine the dimensions of acceleration and its SI units.b) Kinetic Energy K has dimensions kg m2/s2. It can be written in terms of momentum p and mass m following the equation below. Determine the dimensions of the momentum and its SI units. c) The unit of force is the newton N, where 1 N = 1 kg m/s2. Determine the dimensions and the SI units of the momentum in terms of newtons.d) Newton’s law of universal gravitation is F =Gm1m2/r2 , where F is the magnitude of the gravitational force exerted by one object on another, m1 and m2 are the masses of the objects, and r is the distance between them. Determine the dimensions and the SI units of the proportionality constant G.arrow_forwardBEHAICE EVA MAC Hint 1 The following lengths are given in meters. Use metric prefixes to rewrite them so the numerical value is bigger than one but less than 1000. For example, 7.9 × 10-3 m can be written as 7.9 mm. a. 4.7 x 10° m = ? Answer all b. 0.054 m = ? point? C. 6.9 x 10 – 10 ? m = cter? d. 5.7 x 104 m = m/sona cortain dayarrow_forwardDraw direction vectors in unit cells for the following cubic directions: a) [1 -2 3] b) [1 0 -3]arrow_forward
- 18 please need help, keep in mind the 7 basic units and watch the sig figs. Please write in standard form need to see all the numbers in solution thank you so mucharrow_forwardAccording to the article Alien Antimatter Crashes into Earth 2 : More than 60 years ago, future Nobel laureate Sheldon Glashow predicted that if an collided with an antineutrino the antimatter answer to the nearly massless neutrino electron, it could produce a cascade of other particles. The "Glashow resonance - phenomenon is hard to detect, in large part because the antineutrino needs about 1,000 %3D times more energy than what's produced in the most powerful colliders on Earth. Let's compare this event to an ordinary baseball with a mass of 146 g. Please use three significant figures in your calculations.arrow_forwardI need help with knowing what to cirlce. The " increases decreases" part.arrow_forward
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