How many electrons must be removed from a neutral object to leave a net charge of Q2 = 1.7 µC?
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- Express the quantity 254934 m in each of the following. Km Express your answer using six significant figures1. A car speedometer has a 6% uncertainty. What is the range of possible speeds (in km/h) when it reads 80 km/h? km/h (lowest) km/h (highest) 2. Convert this to miles per hour. mi/h (lowest) mi/h (highest)5. When 12 times a number is added to the square of that number, the result is ‒32. Determine the two numbers that fit this condition. Answer step-by-steps. 6. A cannonball is fired from ground level on an arc described by h = ‒t2 + 8t, where h = the height in metres and t is the time in seconds. How many seconds after firing will it land? Answer step-by-steps.
- Part II. Significant Figures The significant figures in a number are all figures that are obtained from the measuring process and exclude those zeros that are included solely for the purpose of locating the decimal point. This definition will be clarified with a number of examples. Number 123 12.3 2016 2.016 2.016 X 10³ 2.01 X 10¹ 2.0 X 10³ 2 X 10³ 10³ 410 410. 4.1 X 10² 4.10 X 10² 41.0 .00159 1.59 X 10 3 0.2 Significant Figures Commentsa) A robin flies a distance of 45 963 cm. How far has it flown in kilometres?(b) What is the speed in metres per second of a car that is travelling at 82 km/h? (c) What is the speed in kilometres per hour of a 27.78 m/s baseball pitch?(d) How many seconds are there in a calendar year, given that a calendar year has 365.24 days in it? T/I5. A hiker travels from camp through the forest. The hiker follows 3 trails and becomes lost. The first is 180 m due west. The second one is 210 m in a direction of 35.00 east of south. The third one is 280 m at 30.0° north of east. What are A) the distance and B) direction the hiker need to walk to return to the camp?
- You live 5.7 miles from school. How many meters away from school do you live? Hint - You must convert miles to feet then feet to meters.-1 3. -2 х + 4, 9. Solve X' subject to 3 3 X(0)10) The speed limit on some interstate highways is roughly 120 km/h. a) What is that speed in meters per second? b) How many miles per hour is this?