Physics, 29.06.2021 23:20, maskoffvon
Một vật dao động điều hòa với biên độ 13cm, tại thời điểm ban đầu vật ở biên dương. Sau khoảng thời gian ∆t vật đi được quãng đường 136,5cm. Vậy trong khoảng thời gian 2∆t vật đi được quãng đường là bao nhiêu
Answers: 2
Physics, 22.06.2019 00:00, madskate9993
During physical science, ms. greene challenged her students to produce an energy transformation. james and jill wrapped a 4-inch nail with a coil of fifty turns of wire. they connected one end of the coil to one terminal of a knife switch. they connected the other terminal of the knife switch to the battery. finally, they connected the end of the coil to the other terminal of the battery. james held the tip of a 1-inch nail near the flat end of the 4-inch nail. jill closed the knife switch quickly and then opened it. the 1-inch nail was pulled toward the 4-inch nail. what is the best explanation of why the nail moved? a) electrical energy was converted to mechanical energy in the 1-inch nail. b) the 4-inch nail became an electromagnet and the magnetic force attracted the 1-inch nail. c) the electric current in the 4-inch nail was converted to mechanical energy in the 1-inch nail. d) the 4-inch nail had a positive charge and the 1-inch nail had a negative charge. opposites attracted.
Answers: 1
Physics, 22.06.2019 07:00, divadebbgirl1
Examine the equation. 23490th→23088ra+42he what kind of barrier would you need to block the radioactive particles from this reaction? a. a piece of paper b. a sheet of aluminum foil c. a two-inch block of lead d. a solid concrete block
Answers: 1
Physics, 22.06.2019 20:00, teescub9738
In an old-fashioned amusement park ride, passengers stand inside a 3.0-m-tall, 5.0-m-diameter hollow steel cylinder with their backs against the wall. the cylinder begins to rotate about a vertical axis. then the floor on which the passengers are standing suddenly drops away! if all goes well, the passengers will “stick” to the wall and not slide. clothing has a static coefficient of friction against steel in the range 0.60 to 1.0 and a kinetic coefficient in the range 0.40 to 0.70. part a what is the minimum rotational frequency, in rpm, for which the ride is safe? express your answer using two significant figures. f f = rpm
Answers: 1
Một vật dao động điều hòa với biên độ 13cm, tại thời điểm ban đầu vật ở biên dương. Sau khoảng thời...
Business, 08.04.2021 20:10
Chemistry, 08.04.2021 20:10
Mathematics, 08.04.2021 20:10
Mathematics, 08.04.2021 20:10
History, 08.04.2021 20:10
Mathematics, 08.04.2021 20:10
Computers and Technology, 08.04.2021 20:10