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The Name Of The Textbook: "Junior Physics" By A.V. Peryshkin

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Posted by Alexander on November 17, 2001 20:21:55 UTC

and N.A. Rodina. "Mir" publisher, Moscow, 1985.

It is the official textbook for 6 and 7 grades in Russia.

At the end of the textbook there is a section: rewiew questions (p.320-333). The problem I mentioned is from the section: Work and Power, p. 328 (in original problem velocities are in km/h).

So, Luis, how about solving that 7-grade problem?


A couple more problem from the same text:

1) A sportsman whose mass is 70 kg jumps to the height 200 cm in 0.4 s. What power does he develop during the jump? (p.328)

This one from the same 7-grade text makes many of my US university students stuck forever with no clue:

2) Electric kettle with the resistance 100 ohm is connected to 220 V outlet. How much water is heated by it from 20 C to the boiling point in 20 min? (p. 332)

Luis, can YOU pass russian 7-grade physics? (I am deeply afraid that with your PREHISTORIC knowledge in physics - not a chance).

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