Physics
What is the minimum speed that a 5-kg conical pendulum can achieve if its 1 m string has a maximum tension rating of 520 N? A. 9.5 m/s B. 10.2 m/s C. 4.9 m/s D. 20.2 m/s E. 12.3 m/s My solution's manual says the answer is B, how is it the answer?
Physics
Consider a 59-cm-long lawn mower blade rotating about its center at 2990 rpm. (a) Calculate the linear speed of the tip of the blade. (b) If safety regulations require that the blade be stoppable within 3.0 s, what minimum angular acceleration will accomplish this? Assume that...
Physics
Sorry something went wrong with my internet and this was posted twice.
Physics
A ball having a mass of 5 kg is attached to a string 1 m long and is whirled in a vertical circle at a constant speed of 13 m/s. (a) Determine the tension in the string when the ball is at the top of the circle. (b) Determine the tension in the string when the ball is at the b...
Physics
Why does the force done by gravity change from positive to negative?
Physics
I see what I was doing wrong now. I was putting the parenthesis in the wrong places. Thank you!
Physics
When I use the first equation I get -90.8 N. What am I doing wrong? I'm putting this is my calculator: 5(169/(.5-9.81)) = -90.76262084 N
Physics
A ball having a mass of 5 kg is attached to a string 1 m long and is whirled in a vertical circle at a constant speed of 13 m/s. (a) Determine the tension in the string when the ball is at the top of the circle. (b) Determine the tension in the string when the ball is at the b...
Chemistry
How many valence electrons are in Na then in the 1+ion of Na?
Chemistry
How much calcium hydroxide is produced from 72.0g of calcium combinig with water?
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