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Hydrogen peroxide decomposes in water by a first order process. A 0.156 M solution of H2O2 decomposes with an initial rate of 1.14E-5 M/s. what is the rate constant for the decomposition reaction? What is the half life? how long will it take for the reaction to be 87.5% complete?
An 8 g of ice cube at %u2013 120 C is put into a thermos flask containing 100 cm3 of tea at 850C. What is the drop in temperature for tea
A 2.50-kg stone is dropped from rest at a height of 3.75 m. What impulse does gravity impart to this stone from the instant
The position of a 2.6 kg mass is given by x = (2t^3-4t^2), where t is in seconds. What is the net horizontal force on the mass
The height of a helicopter is given by h=150+5(t)^3. Where h is in meters and s is in seconds. After 5s the helicopter releases a small mailbag. what is its velocity just before impact with the ground
A child makes a "raft" by inserting a pin perpendicularly into the flat surface of a cork with diameter D. What is the maximum height h of the pin if its tip is completely hidden from view when observed from above the surface of the water
The Space Shuttle travels at a speed of about 7.50 103 m/s. The blink of an astronaut's eye lasts about 100 ms. How many football fields (length = 91.4 m) does the Shuttle cover
A mercury barometer reads 735.0 mm on the roof of a building and 764.5 mm on the ground. determine the height of the building
two sources source a and source b are emitting the same frequency f with the same amplitude a but are out of phase from
Electrons are accelerated through a voltage difference of 175 kV inside a high voltage accelerator tube. What is the final kinetic energy of the electrons?
A proton and an alpha particle (charge = 2e, mass = 6.64 10-27 kg) are initially at rest, separated by 2.30 10-15 m. What are both of their speeds at infinity
In a vacuum, two particles have charges of q1 and q2, where q1 = +3.66 ?C. They are separated by a distance of 0.213 m,
q1. the sound level measured in a room by a person watching a movie in a home theatre system varies from 66 db during a
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