Aloaded ore car has a mass of 950 kg. and rolls on rails ofnegligible friction. it starts from rest ans is pulled up a mineshaft by a cable connected to a winch. the shaft is inclined at30.0 degrees above the horizontal. the car accelerates uniformly toa speed of 2.20m/s in 12.0s and then continues at constant speed.(a) what power must the winch motor provide when the car is movingat constant speed? (b) what maximum power must the winch motorprovide? (c) what total energy has transfered out of the motor bywork by the time the car moves off the end of the track, which isof length 1250m?
Answers: 1
Physics, 21.06.2019 14:40
An implanted pacemaker supplies the heart with 72 pulses per minute, each pulse providing 6.0 v for 0.65 ms. the resistance of the heart muscle between the pacemakerβs electrodes is 550 Ο. find (a) the current that flows during a pulse, (b) the energy delivered in one pulse, and (c) the average power supplied by the pacemaker.
Answers: 3
Physics, 21.06.2019 18:00
This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical
Answers: 2
Physics, 22.06.2019 00:30
Glass is transparent to visibile light under normal conditions; however, at extremely high intensities, glass will absorb most of the light incident upon it. this works through a process known as multiphoton absorption. in this process, several photons are absorbed at the same time. if very intense light whose photons carry 2ev of energy is shined onto a material with a band gap of 4ev, that light can be absorbed through two-photon absorption, because two photons have the right amount of energy to bridge the band gap. what is the minimum number of photons of 800-nm light that are needed to equal or exceed the band gap of fused silica glass
Answers: 1
Physics, 22.06.2019 11:30
Madison pushes with a 210-n horizontal force on a 24-kg crate of coffee resting on a warehouse floor. the force of friction on the crate is 74 n. what is the acceleration?
Answers: 1
Aloaded ore car has a mass of 950 kg. and rolls on rails ofnegligible friction. it starts from rest...
Mathematics, 09.07.2019 12:00
Mathematics, 09.07.2019 12:00
Mathematics, 09.07.2019 12:00
Mathematics, 09.07.2019 12:00
Mathematics, 09.07.2019 12:00
Mathematics, 09.07.2019 12:00
Biology, 09.07.2019 12:00
Mathematics, 09.07.2019 12:00