Physics, 12.09.2021 14:40 Amandachavez94
Bài 1: Một vật dao động điều hoà theo phương trình: x = 5cos2pt(cm)
a) Xác định biên độ dao động, chu kỳ, pha ban đầu của dao động
b) Lập biểu thức của vận tốc và gia tốc
c) Tính li độ, vận tốc và gia tốc ở thời điểm t = s
d) Tính vận tốc của vật ở li độ x = 2,5 cm
Answers: 3
Physics, 22.06.2019 11:50
Two resistors r1 and r2 may be connected either in series or parallel across an ideal battery with emf ε. we desire the rate of energy dissipation of the parallel combination to be 8.75 times that of the series combination. if r1 = 105 ω, what are the (a) smaller and (b) larger of the two values of r2 that result in that dissipation rate?
Answers: 2
Physics, 22.06.2019 17:20
The magnitude of the magnetic field at a certain distance from a long, straight conductor is represented by b. what is the magnitude of the magnetic field at twice the distance from the conductor? a. at twice the distance, the magnitude of the field is 4b.b. at twice the distance, the magnitude of the field is 2b.c. at twice the distance, the magnitude of the field is b/2.d. at twice the distance, the magnitude of the field is b/4.e. at twice the distance, the magnitude of the field remains equal to b.
Answers: 3
Physics, 23.06.2019 01:30
If the pressure in a gas is doubled while its volume is held constant. true or false
Answers: 3
Bài 1: Một vật dao động điều hoà theo phương trình: x = 5cos2pt(cm)
a) Xác định biên độ dao động,...
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
History, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Biology, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Biology, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Mathematics, 14.09.2020 15:01
Biology, 14.09.2020 15:01