Physics, 01.02.2021 14:00 villarrealc1987
A swimmer accelerates 4 m/s² while applying a force of 20N. What is the swimmer’s mass?
0.2 kg
5 kg
80 kg
80 pounds
Answers: 2
Physics, 22.06.2019 11:20
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 13:00
Which of the following correctly describes what happens when an atomic bomb explodes? small pieces of fissionable material are joined and form a body with a mass greater than the critical mass, the relative number of neutrons escaping decreases, and a chain reaction and explosion result. large pieces of fissionable matter are brought together quickly and form a body with a mass smaller than the critical mass, the relative number of escaping neutrons increases, and a chain reaction and explosion result.
Answers: 2
Physics, 22.06.2019 15:30
What is a view of science and psychology that says the value of knowledge depends on its usefulness? a. pragmatism b. psychotherapy c. physiology
Answers: 2
Physics, 22.06.2019 20:50
An ideal otto cycle has a compression ratio of 8. at the beginning of the compression process, air is at 95 kpa and 27°c, and 750 kj/kg of heat is transferred to air during the constant-volume heat-addition process. assuming constant specific heats at room temperature, determine (a) the pressure and temperature at the end of the heat-addition process, (b) the net work output, (c) the thermal efficiency, and (d) the mean effective pressure for the cycle. (4390 kpa, 1730 k; 423 kj/kg; 56.4%; 534 kpa)
Answers: 1
A swimmer accelerates 4 m/s² while applying a force of 20N. What is the swimmer’s mass?
0.2 kg
Mathematics, 18.01.2020 07:31
Mathematics, 18.01.2020 07:31
Social Studies, 18.01.2020 07:31
Mathematics, 18.01.2020 07:31
Mathematics, 18.01.2020 07:31
Mathematics, 18.01.2020 07:31
Mathematics, 18.01.2020 07:31
Computers and Technology, 18.01.2020 07:31
History, 18.01.2020 07:31
Business, 18.01.2020 07:31
Mathematics, 18.01.2020 07:31