Ball swing as a pendulum
A 281 ball is tied to a string. It is pulled to an angle of 3.6 and released to swing as a pendulum. A student with a stopwatch finds that 26 oscillations take 18 .
How long is the string?
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A small mailbag is released from a helicopter that is descending steadily at 3.00 m/s.
A conducting slab (think of a large flat sheet of metal) is large compared to the size of individual particles and molecules and carries an excess positive charge. a) Where does the excess charge reside?
You estimate your line of sight with the top of the arch to be 9.8° above the horizontal. Approximately how far (in kilometers) are you from the base of the arch?
Express the work of isothermal reversible expansion of a van der Waals gas in reduced variables and find a definition of reduced work that makes the overall expression independent of the identity of the gas.
We have b = 18 × 109 bits that need to be sent over a channel which has a constant but random rate R bits/second with PMF: pR(r) = 1/3, if r = 3 × 109 bits/second 2/3, if r = 900 × 106 bits/second 0, otherwise. Note that sending
The mass of the gas in the balloon must be 200 kilograms less than the mass of the ambient air it displaces. Pres-sure (ambient and in the balloon) is 100 kPa and ambient temperature is 300 K. Mass of the balloon fabric may be neglected. Determine
A 1.0 ounce piece of chocolate contains 15 of caffeine, and a 6.0 ounce cup of regular coffee contains 105 of caffeine.How much chocolate would you have to consume to get as much caffeine as you would from 3.0 cups of coffee?
A graduate course has 3 biology students and 4 chemistry students. A sample of 2 students is randomly selected from this class to form a committee. Let X denote the number of biology students who were selected. What are the possible values of X?
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