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The concentration of H3O+ in your swimming pool is 3 x 10-11 M. What is the pH of your swimming pool?
suppose that the position vector fot a particle is given as a function of time by r(t) =x(t)i + y(t)j, with x(t) = at+b and y(t) = ct^2 + d, where a= 1.50m/s, b =1.25m, c= 0.123m/s^2, and d =1.02m
The gravitational attraction between them is 7.03×10?6N when their centers are 22.0cm apart. What is the mass of the lighter object
An open flask sitting in a lab fridge looks empty, but we know that actually it is filled with a mixture of gases called air. If the flask volume is 0.00415 m3 and the air is at standard temperature and pressure, how many gas molecules does the flask..
When the dried-up seed pod of a scotch broom plant bursts open, it shoots out a seed with an initial velocity of 2.66 at an angle of 30.0 below the horizontal. Obtain how long does it take for the seed to land
electric train consider the possibility of a new design for an electric train. the engine is driven by the force on a
A 5.5-kg block slides on a level surface and stops because of friction. Its initial speed is 9.0 m/s and the temperature of the surface is 20oC. Determine the entropy change of the block, which is the system in this process.
Establish the speed of transverse waves on a string under a tension of 80.0 N if the string has a length of 2 m and a mass of 5 g. (b) Calculate the power required to create these waves if they have a wavelength of 16 cm and an amplitude of 4 cm.
An engine running at 62.5% efficiency transfers 154 J of heat to the cold reservoir through each cycle. How much heat does the engine receive from the hot reservoir each cycle?
A bike and rider have a total mass equal to 200 kilogram. Calculate the net force on the bike
The time constant of an RC circuit is 4.5 s. How much time t is required for the capacitor (uncharged initially) to gain one-half of its full equilibrium charge?
q1. what is the maximum speed with which a 1200- car can round a turn of radius 71 on a flat road if coefficient of
Find the work done by an ideal engine which extracts 11500.0 J of heat from its hot reservoir while operating between 530.0 K and 310.0 K
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