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the second low of thermodynamics tell us that the amount of disorder, called entropy, is always increasing. Does the growth of a plant or animal violate the second low? a. yes, a plant or animal is more highly ordered b. no, the total entropy of the universe increased c. the answer is unknown
An alpha particle (m = 6.7 x 10^-27kg, q = +3.2 x 10^-19C) has a speed of 30km/s at point A and moves to point B where it momentarily stops. Only electric forces act on the particle throughout this motion. Find out the electric potential difference.
If the speed of the wave is 10 percent less in the organ than in the medium above, determine the depth of the tumor below the organ's surface.
A steel band exerts a horizontal force of 76N on a tooth at point B. What is the torque on the root of the tooth about point A.
A 2.0 kg mass (mA) and a 5.50 kg mass (mB) are connected to a lightweight cord that passes over a frictionless pulley. The pulley only changes the direction of the force exerted by the rope.
What is the mass of the block on the left. Find this angle of the thread.
In what time interval does it reach this velocity. How high would the insect jump if air resistance were negligible.
What will be the resulting speed of the boat. A 74 kg fireman slides down a 4-m pole by applying a frictional force of 384 N against the pole with his hands. If he slides from rest, how fast is he moving once he reaches ground.
Two parallel plates 0.600cm apart are equally and oppositely charged. An electron is released from rest at the surface of the negative plate and simultaneously a proton is released from rest at the surface of the positive plate. How far from the n..
A bat flying in a cave emits a sound and receives its echo 0.37s later. How far away is the cave wall? (Hint: The sound has to travel to the wall and then back again. Use 340 m/s for the speed of sound.)
A ski jumper has 1.2 ´ 10 J of potential energy at the top of the ski jump. The friction on the jump slope is small, but not negligible. What can you end about the ski jumper's kinetic energy at the bottom of the jump.
What tension in Newtons should a 50cm length of string support in order to whirl an attached 2000g stone in a circular path at 5 m/s.
Three charges are situated at corners of a rectangle. How much energy would be expended in moving the 8µC charge to infinity.
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