A hollow sphere has a 4.4 m long string wrapped around it. The free-end of the string is held and the hollow sphere is released thus unwinding the string as it falls. Determine how fast the hollow sphere will be going at the moment the string is completely unwound assuming no thermal energy is generated.
Answers: 1
Physics, 22.06.2019 11:20, cjd1214812148
The ultracentrifuge is an important tool for separating and analyzing proteins. because of the enormous centripetal accelerations, the centrifuge must be carefully balanced, with each sample matched by a sample of identical mass on the opposite side. any difference in the masses of opposing samples creates a net force on the shaft of the rotor, potentially leading to a catastrophic failure of the apparatus. suppose a scientist makes a slight error in sample preparation and one sample has a mass 10 mg larger than the opposing sample. if the samples are 12 cm from the axis of the rotor and the ultracentrifuge spins at 70,000 rpm, what is the magnitude of the net force on the rotor due to the unbalanced samples? ( be thorough on your answer)
Answers: 3
Physics, 22.06.2019 18:00, abigail018
Which statement is true if the refractive index of medium a is greater than that of medium b? a. total internal reflection is possible when light travels from air to medium b to medium a. b. total internal reflection is possible when light travels from medium a to medium b. c. total internal reflection is possible when light travels from medium b to medium a. d. total internal reflection is possible when light travels from air to medium a. e. total internal reflection is possible when light travels from air to medium b.
Answers: 1
A hollow sphere has a 4.4 m long string wrapped around it. The free-end of the string is held and th...
History, 26.03.2020 20:37
Chemistry, 26.03.2020 20:37
Mathematics, 26.03.2020 20:37
English, 26.03.2020 20:37
History, 26.03.2020 20:37
Mathematics, 26.03.2020 20:37