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To compare the acidity of different solutions, chemists use the pH (which is a single number, not the product of p and H). The pH is defined in terms of the concentration, x, of hydrogen ions in the solution as
Find the rate of change of pH with respect to hydrogen ion concentration when the pH is 2.
A candle is 50 centimeter in front of a convex spherical mirror that has a focal length of 31 centimeter. Evaluate the magnification of the image
A nanowire is a (nearly) one-dimensional structure with a diameter on the order of a few nanometers. What is the tension in the middle
What type of information would you tell the prospective employer?. Explain how would you share be to your advantage or disadvantage?
A small boat is moving at a velocity of 5.58 m/s when it is accelerated by a river current perpendicular to the initial direction of motion. what will the new velocity of the boat be after 55.8 s
Can a satellite be sent out to a distance where it will revolve about the earth with an angular velocity equal to that at which the earth rotates, so that it remains always above the same point on the earth? Must the plane of its orbit be an equat..
A rope is attached between two trees with a boy hanging from it. The trees are 9.3 m apart and while the boy is hanging onto the rope, How far is the boy from the nearest tree
the helicopter in the drawing is moving horizontally to the right at a constant velocity. the weight of the helicopter
Light in a trasnparant material (index of refraction 1.333) strikes a boundary with another transparant material. (n=1.010), What is the critical angle for total internal reflection
a block on a frictionless horizontal surface is attached to a spring (k=30 N/m). the mass is displaced to the right of equilibrium and released from rest. calculate amplitude of oscillations
A pulley system lifts a 1345-N weight a distance of 0.975 m. Paul pulls the rope a distance of 3.90 m, exerting a force of 375 N. How efficient is the system? What is the mechanical advantage?
The rock strikes the ground a horizontal distance of 44 m from the base of the building. Assume that the ground is level and that the side of the building is vertical. How long did the rock take to hit the ground? Give your answer in seconds to two d..
A 200 kg body is pulled up an inclined plane 15 m long and 5 m high. The force required to pull the body up the plane at a slow uniform speed is 976 N. compute the ideal mechanical advantage, the actual mechanical advantage and the efficiency of t..
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