How much work is done on the rock by the rope
A 2 kg rock, tied to a 3 meter long rope, is spun around in a horizontal circle at 4 m/s. How much work is done on the rock by the rope as it goes around the circle one time at constant speed? (answers are in units of Joules)
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What is the probability that there are anywhere from 2 to 4 (inclusive) that do not have a useful life of at least 800 hours in a batch?
Find the 99% confidence interval of the mean number of jobs? To estimate the true mean within 1/2 job with 99% confidence, how large of a sample is needed?
An oscillating LC circuit has a current amplitude of 9.80 mA, a potential amplitude of 276 mV, and a capacitance of 232 nF. What are: (a) the period of oscillation (b) the maximum energy stored in the capacitor
What is most nearly the amount of work done to overcome friction to slide the block a distance of 20 meters across this surface.
Do they qualify for any of the loans in Question 10 if the bank requires a total housing cost ratio less than 28% and a total debt-to-payments income ratio of 36%?
The number of customers arriving per hour at a certain automobile service facility is assumed to follow a Poisson distribution with a mean of 5.6 customers per hour. What is the probability that there are at least 50 arrivals in an 8-hour shift?
An electron was accelerated from rest through a potential difference of 9900 V. What is its speed? The mass of an electron is 9.11 x 10-31 kg, and its charge is 1.602 x 10-19 C. Please show work.
A sphere of diameter 100 mm, rotating at a rate of 286 rpm, is situated in a stream of water (15 degree C) that has a velocity of 1.5 m/s. Determine the lift force (in Newtons) of the rotating sphere.
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