Average frictional force exerted on firefighter by the pole
Starting from rest, a 89-kg firefighter slides down a fire pole. The average frictional force exerted on him by the pole has a magnitude of 815 N, and his speed at the bottom of the pole is 3.0 m/s. How far did he slide down the pole?
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A slingshot fires a pebble from the top of a building at a speed of 17.8 m/s. The building is 30.0 m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the pebble is fired in the following directions.
Why does the pH change when you add a salt/common ion? What is the effect of adding a strong acid or base to asolution?
A teacher ask her class, "How many children are there in your family, including yourself?" The mean response is about 3 children. According to the 2000 census, families that have children average 1.86 children. Why is a sample like this biased tow
Calculate the following by hand: Draw the process on P-v and T-s diagrams? What are the maximum and minimum temperatures of the cycle in °R?
The employee taken at random turns out to be male. Compute the probability that he earns more than $30,000 a year (to 4 decimals).
Compute the cooling load for a window facing south at 36 deg N latitude at 1:00 P.M. sun time in july. The glass is 5-mm sheet in an aluminum frame with no thermal break with venetian blinds of medium color.
Discuss the resonance and inductive effects of a halogenatom with respect to the reactivity of a halobenzene compared to benzene in electrophilic aromatic substitution reactions.
Imagine that the correlation between the number of hours a child watches tv in a week and his/her score on a common measure of sustained attention (The CPT - Continuous Performance Test) is - .48. The CPT is scaled so that higher scores indicate b
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