Computing the potential energy
Mary weighs 475 N and she walks down a flight of stairs to a level 5.00 m below her starting point. What is the change in Mary's potential energy
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Critique federal government's method(s) for granting pay raises. Describe the methods and make recommendations for improvement. Be realistic and consider if and how the difficult economy is impacting your employer.
A loudspeaker of mass 17.0 {rm kg} is suspended a distance of h = 2.20 {rm m} below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.70 {rm m}.
Assume that the kinetic energy of a 1100{rm kg} car moving at 125{rm km/h} could be converted entirely into heat. What amount of water could be heated from 21C to 52C by the car's energy.
An 9.0 m, 200 N uniform ladder rests against a smooth wall. The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. How far up the ladder can an 760 N person climb befor
When a 124 N bag of nails hangs motionless from a single vertical strand of rope, how much tension is exerted in the strand?
A 21.2 mL sample of a weak monoprotic acid, HX, requires 50.0 mL of 0.045 M NaOH to reach the equivalence point. After the addition of 30.0 mL of NaOH, the pH is 4.90. What is the Ka of HX?
A toy car runs off the edge of a table that is h = 1.150 m high. The car lands d = 0.425 m from the base of the table. How fast was the car going on the table?
An 800 N gorilla swings from vine to vine. As the gorilla grabs a new vine, both vines form an angle of 30o with the vertical. What is the net force on each vine?
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