Physics, 08.10.2019 14:50 tieragroff
A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the ground, it is traveling 7 m/s. assuming that there is no air resistance, which statement is true?
a. the initial potential energy is less than the final kinetic energy
b. the mechanical energy is not conserved
c. the initial potential energy is greater than the final kinetic energy
d. the mechanical energy is conserved
Answers: 3
Physics, 22.06.2019 09:30, smiley29162
Gasoline comes from petroleum, which is made from ancient living things. petroleum, therefore, contains a type of energy. a. heat b. nuclear c. biological d. chemical potential
Answers: 2
Physics, 22.06.2019 10:30, Bayabbay8380
Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.
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
A2-kg bowling ball is 2.5 meters off the ground on a post when it falls. just before it reaches the...
English, 23.02.2021 23:40
Mathematics, 23.02.2021 23:40
Mathematics, 23.02.2021 23:40
Physics, 23.02.2021 23:40
Biology, 23.02.2021 23:40
History, 23.02.2021 23:40
Physics, 23.02.2021 23:40