Physics, 12.03.2020 13:25 beckers0115
Кусок проволоки и лампочка имеют одинаковые сопротивления. Лампочку подключают к сети так, что она нагревается на 750С. На сколько процентов нужно увеличить длину проволоки, чтобы их сопротивления вновь сравнялись?
Answers: 1
Physics, 22.06.2019 14:30
What distance does a car travel as its speed changes from 0 to 20 m/s in 17 s at constant acceleration?
Answers: 1
Physics, 23.06.2019 06:30
Acopper sheet has a volume of 100 cm³. if the density of copper is 8.9 g/cm³, what is the mass of the sheet? a. 11 g b. 8.9 g c. 189 g d. 890 g
Answers: 1
Physics, 23.06.2019 07:30
Aspring has a relaxed length of 33 cm (0.33 m) and its spring stiffness is 6 n/m. you glue a 76 gram block (0.076 kg) to the top of the spring, and push the block down, compressing the spring so its total length is 15 cm. you make sure the block is at rest, then at time t=0 you quickly move your hand away. the block begins to move upward, because the upward force on the block by the spring is greater than the downward force on the block by the earth. calculate y vs. time for the block during a 0.09-second interval after you release the block, by applying the momentum principle in three steps each of 0.03-second duration.
Answers: 1
Кусок проволоки и лампочка имеют одинаковые сопротивления. Лампочку подключают к сети так, что она н...
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