College Physics, Volume 1
2nd Edition
ISBN: 9781133710271
Author: Giordano
Publisher: Cengage
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Chapter 1, Problem 5Q
To determine
The new standard has over the old.
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A light-year is a measure of the astronomical distance that light traverses in a vacuum in 1 year.
(a) How many kilometers does light traverse in 1 ly?
km
(b) What is the speed of light c in terms of ly per year.
ly/y
(c) Express your answer from (b) in terms of feet per nanosecond.
ft/ns
The meter is the standard unit of length for physics. Which of these is the current way we define that standard?
Based on a metal bar serving as a length "standard " that is kept by the National Institute of Standards and Technology (NIST) in the U.S.
Based on the average distance from the Earth to the Sun.
Based on the diameter of the Earth.
Precisely how far light travels in 1/299792458 second.
I don't understand this. why365.0g is significant figures? I think its effective number is 3, and why 362mL has 3 effective numbers. Isn't 362.0mL and 362mL the same thing?
Chapter 1 Solutions
College Physics, Volume 1
Ch. 1.3 - Give the number of significant figures for all the...Ch. 1.4 - Prob. 1.2CCCh. 1.5 - The area of a surface can be measured in units of...Ch. 1 - Suppose a friend told you that the density of a...Ch. 1 - Prob. 2QCh. 1 - Prob. 3QCh. 1 - Prob. 4QCh. 1 - Prob. 5QCh. 1 - Prob. 6QCh. 1 - Prob. 7Q
Ch. 1 - Prob. 8QCh. 1 - Prob. 9QCh. 1 - Prob. 1PCh. 1 - You take a long walk on a sandy beach. When you...Ch. 1 - Prob. 3PCh. 1 - Prob. 4PCh. 1 - Prob. 5PCh. 1 - Prob. 6PCh. 1 - Prob. 7PCh. 1 - Prob. 8PCh. 1 - Prob. 9PCh. 1 - Prob. 10PCh. 1 - Prob. 11PCh. 1 - Prob. 12PCh. 1 - Prob. 13PCh. 1 - Prob. 14PCh. 1 - Prob. 15PCh. 1 - Prob. 16PCh. 1 - Prob. 17PCh. 1 - Prob. 18PCh. 1 - Prob. 19PCh. 1 - Prob. 20PCh. 1 - Prob. 21PCh. 1 - Prob. 22PCh. 1 - Prob. 23PCh. 1 - Prob. 24PCh. 1 - Prob. 25PCh. 1 - Prob. 26PCh. 1 - Prob. 27PCh. 1 - Prob. 28PCh. 1 - Prob. 29PCh. 1 - Consider the equation mgh=12mv2 where m has units...Ch. 1 - Prob. 31PCh. 1 - Prob. 32PCh. 1 - Prob. 33PCh. 1 - Prob. 34PCh. 1 - Prob. 35PCh. 1 - Prob. 38PCh. 1 - Prob. 39PCh. 1 - Prob. 40PCh. 1 - Prob. 41PCh. 1 - Prob. 42PCh. 1 - Prob. 43PCh. 1 - Prob. 44PCh. 1 - Steep grade. A mountain road makes an angle = 8.5...Ch. 1 - Prob. 46PCh. 1 - Prob. 47PCh. 1 - Prob. 48PCh. 1 - Prob. 49PCh. 1 - Prob. 50PCh. 1 - Prob. 52PCh. 1 - Prob. 53PCh. 1 - Prob. 54PCh. 1 - Prob. 55PCh. 1 - Prob. 56PCh. 1 - Prob. 57PCh. 1 - Prob. 58PCh. 1 - Prob. 59PCh. 1 - Prob. 60PCh. 1 - Prob. 61PCh. 1 - Prob. 62PCh. 1 - The unit of area called the acre comes from an old...Ch. 1 - Prob. 64PCh. 1 - Prob. 65PCh. 1 - Prob. 66PCh. 1 - Prob. 67PCh. 1 - Prob. 68PCh. 1 - Prob. 69PCh. 1 - Prob. 70PCh. 1 - Prob. 71PCh. 1 - Prob. 72PCh. 1 - Prob. 73PCh. 1 - Prob. 74PCh. 1 - Prob. 75P
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- While a meter is the fundamental unit of length, most distances traveled by humans are measured in miles or kilometers. Why do you think this is?arrow_forwardWhat is the answer for 206.7 +0.28 × 0.439 with the correct number of significant figures? (q122) a) 206.82 b) O206.823 c) O206.8229 d) O206.8arrow_forwardWithin the Solar System, a convenient unit of measurement is the Earth-Sun distance, called an astronomical unit (AU). For bigger distances, we use the light year (LY), the distance that light travels in one year. Starting with the values you can look up in the Appendices for the speed of light and the astronomical unit, calculate how many “light minutes” there are in 1 AU.arrow_forward
- 1. A student is using a track photogate to determine the time it takes her to run 50 meters. She records the following times: Trial Time (seconds) 1 5.420 5.464 3 5.728 4 5.496 5 5.644 6. 5.794 7 5.540 The data she collects has a mean of 5.583714 seconds, with an absolute uncertainty computed to be 0.141074 seconds. Report her 50-meter time as a confidence interval (а) using the mean and the absolute uncertainty given above. Another student measures his 200-meter run time (b) to be 20.7 ± 0.3 seconds. Report the relative uncertainty of each student and identify which has the more precise run time.arrow_forwardWhat is the value of n+r/(2.000) 2, written with the correct number of significant figures? O 3.92699 O 3.9269 O 3.9270 O 3.927 O 3.93arrow_forwardImagine that in the measurement of 4.6 cm long metallic cylinder, your measurements in centimeters are (3.0, 3.5, 4.0, 4.5, 5.0, 5.5,6.0). What is the standard error of your length measurement. O 1.08 O 0.022 O 0.22 O 0.41 O2.22arrow_forward
- use these formula to solve the problem: I1+I2=13 eq 1 I1R1+I3R3=Va eq 2 I2R2+I3R3=Vb eq 3arrow_forwardGiven that the Diameter of Earth is about 7200 miles, how many Earths would fit across the Sun? You turn toward the east, seeing the full moon rising. You find that half of your finger tip at arm's length also covers the diameter of the Moon! Given that the diameter of the Moon is about 2160 miles, approximately how far from Earth is the Moon in miles and km according to your calculations?arrow_forwardA light-year (ly) is the distance light travels in one year (at speed of 2.998 ×× 108 m/sm/s ). An astronomical unit (AU) is the average distance from the Sun to Earth, 1.50 ×× 108 km. 1 year = 3.156 ×× 107 s. How many meters are there in 1.70 ly? Express your answer using three significant figures. Express in scientific notation! 1.70 ly = _________________m How many AU are there in 1.70 ly light-year? Express your answer using three significant figures. Express in scientific notation! 1.70 ly = _________________AUarrow_forward
- A scientist is working with 19 meters of gold wire. How long is the wire in millimeters? Be sure to include the correct unit in your answer.arrow_forwardA tape measure that can be read to the nearest eighth of an inch gives your height as 62 3/8 inches. A new laser device at the doctor’s office that gives readings to the nearest 0.05 inch gives your height as 62.35 inches. Your true height is 62.50 inches. a. Which measuring device is more accurate? (WORK: Compare the absolute errors for the measuring devices.) Answer: Tape OR Laser is more accurate. (Circle your choice above.) b. Which measuring device is more precise? (WORK: Compare the increments of measure for the measuring devices.) Answer: Tape OR Laser is more precise. (Circle your choice above.)arrow_forwardA scanning electron micrograph of xylem vessels in a corn root shows the vessels magnified by a factor of 598. In the micrograph the xylem vessel is 2.80 cm in diameter. What is the diameter of the vessel itself?arrow_forward
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