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Suppose high school students work together in small groups to study the material in the courses. Some groups have a strong positive effect, helping the students get on top of the course work. Some groups have a negative effect. And some groups have no effect. Are study groups consistent with the model used by Evans and Schwab? If not, which assumptions are contradicted?
A parallel plate capacitor has a plate area of 2.5 m2, spacing of 0.52 mm, and dielectric material between the plates with k=9.8. How much energy is stored by the capacitor
A 785 Hz sound wave travels through a gas. If the wavelength of the sound is 0.6 m, what is the speed of sound in the gas
A uniform, 257-{\rm N} rod that is 2.05 {\rm m} long carries a 225-{\rm N} weight at its right end and an unknown weight W toward the left end, how far must the fulcrum be moved to restore balance
What is the charge on negative electrode. Find out the wavelength.
a long spring is stretched and attached to two walls 5.42 m apart. the mass of the spring is 276 g. the tension in the
A motorcyclist is able to ride on the vertical wall of a bowl- shaped track . his weight is counteracted by the friction of the wall on the tires. what force increase or decrease if he rides faster.
An evacuated tube uses an accelerating voltage of 44.0 kV to accelerate electrons to hit a copper plate and produce x rays. Non-relativistically, what would be the maximum speed of these electrons?
Suppose you are climbing up stairs, gaining 10 meters of height per minute. In order to do that, your body has to do some work, using energy, at a given rate. What is the power produced by your body? Ignore energy losses.
a swimmer is capable of swimming 0.60 ms in still water.a if she aims she aims her body directly across a 55 meter wide
A 75kg person goes down a straight slide inclined at 32 degrees above the horizontal. what is the persons acceleration
Physics Lab Report - Procedure, Data and Calculations. Was your value of the velocity of sound approximately equal to the accepted value, within a reasonably small percent error? What specific defects in the equipment or procedure might have contri..
A 22 {\rm kg} sphere is at the origin and a 12 {\rm kg} sphere is at (x, y) = ( 22 {\rm cm} , 0 {\rm cm}) At what point or points could you place a small mass such that the net gravitational force on it due to the spheres is zero?
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