Recent content by voygehr

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    Find the Launch Speed for a 20m High Projectile

    haha excellent!
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    Find the Launch Speed for a 20m High Projectile

    just solved it! v=34 m/s at 36° thanks anyway! (do I delete this thread now?)
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    Find the Launch Speed for a 20m High Projectile

    Homework Statement The maximum height reached by a projectile is 20 m. The direction of the velocity 1.0 s after launch is 20°. Find the speed of launch. Homework Equations vertical component of velocity = u \sin\theta - gt horizontal component of velocity = u\cos\theta where theta...
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    What is the approximate uncertainty in r for the given formula V=\pi r^{2} h?

    Yes, that makes sense. Thanks!
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    What is the approximate uncertainty in r for the given formula V=\pi r^{2} h?

    Bump. Any ideas?
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    What is the approximate uncertainty in r for the given formula V=\pi r^{2} h?

    That was my first thought as well. But the key says no. And as proved in my previous post, the 5% uncertainty does make sense, however if used in the original equation (or by simply reversing the second) it doesn't sum up.
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    What is the approximate uncertainty in r for the given formula V=\pi r^{2} h?

    Homework Statement V=\pi r^{2} h The uncertainties in V and h are shown below V 7% h 3% The approximate uncertainty in r is: A. 10% B. 5% C. 4% D. 2% 2. The attempt at a solution According to the key the correct answer is B. This answer can be calculated by: r^{2}=\frac{V}{\pi h} which...