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Physics Capa Problems

# Physics Capa Problems - Physics Capa Problems(Set 1 A right...

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Physics Capa Problems (Set 1) A right cylinder has a radius r of 17.5 cm and a height h of 48.7 cm. What is the volume of the cylinder in m 3 ? Hint: The volume of a cylinder is π r 2 h, where r is the radius of the base, and h is the height. Solution: V = π r 2 h = π · (17.5·10 -2 m) 2 · 48.7·10 -2 m = 0.0468548909328833 m 3 The thread spacing of a screw is listed as 0.011260 mm. How many significant digits are given? Hint: You may want to re-read the section on significant figures. Leading 0's don't count in the significant figures, even if they appear after the decimal point. The trailing 0 counts for the significant figures. This means that the number of significant figures in your case is 5 How far in miles would a schoolbus go in 3 hours, 15 minutes at 70 km/h? Hint: You have to convert minutes into a fraction of an hour. To learn the conversion from miles to km use the help appendix for unit conversion . Solution: 1 mile = 1.609 km The schoolbus travels a distance d = v · t = 70 km/hour · (1 mile / 1.609 km) · (3 hour + (15 minutes / 60)) = 141.392169049099 miles

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Choose the correct SI units for the function of x, v, a, t, and m given. A. kg·m 2 /s 2 B. kg·m/s 2 C. kg·m 2 /s D.kg·m/s E. kg·m 2 /s 3 F. kg·m 2 G.m/(s·kg) H. m/s 2 E: mv 2 /t B: mv/t G: v/m D: mv If A=22.3 s 1 m 4 kg 6 and B=12.1 m 1 s 4 kg 2 , then C=A/B is ... Please enter both the numerical part and the unit of C. Use "*" for multiplication, and "^" for exponentiation. Example: 4.63 kg/(m*s^2) 1.8430 m^3*kg^4/s^3 Consider A=144 g·km and B=36 mg·km Please identify which operations are possible, and which are not. If the operation is possible, also check the given result. Examples: You cannot add 5m and 3s, so "this operation is impossible."
You can add 5m and 3cm, so "this operation is possible" - however, the answer 8m would false. This is correct: You can divide A by B, and get 4000 This operation is impossible: You can add A and B 2 , and get 144.001296 m·kg This operation is possible, but the answer is false: You can multiply A and B, and get 5.184 m·kg This is correct: You can multiply A and B, and get 5.184 m 2 kg 2 This is correct: You can add A and B, and get 144.036 m·kg Average Velocity A student walks 0.55 km to class in 5 minutes and then back in 5.4 minutes. What is his average velocity in m/s? Hint: The average velocity is the displacement divided by the time. However, in this case, the displacement is zero since the initial and final positions are the same. Solution: Since the displacement is 0, so is the average velocity. Distance

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After landing, a jet airplane comes to rest uniformly (the acceleration is constant) in 10 seconds. The landing speed of the aircraft is 190 km/hour. How far, in m, does the aircraft roll? Hint : This is a constant acceleration problem . The easy way to do it to use v ave the average velocity , which is half way between the initial and the final. Just multiply this by the time.
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