Physics, 22.04.2020 17:21 Haleysaraya1
You obtain a spectrum of an object in space. The spectrum consists of a number of sharp, bright emission lines. Is this object a cloud of hot gas, a cloud of cool gas, or a star?
Answers: 3
Physics, 22.06.2019 10:40
As you are trying to move a heavy box of mass m, you realize that it is too heavy for you to lift by yourself. there is no one around to , so you attach an ideal pulley to the box and a massless rope to the ceiling, which you wrap around the pulley. you pull up on the rope to lift the box. use g for the magnitude of the acceleration due to gravity and neglect friction forces. once you have pulled hard enough to start the box moving upward, what is the magnitude f of the upward force you must apply to the rope to start raising the box with constant velocity? express the magnitude of the force in terms of m, the mass of the box.
Answers: 1
Physics, 22.06.2019 19:00
Abatter hits a 0.140-kg baseball that was approaching him at 30 m/s and, as a result, the ball leaves the bat at 40 m/s in the reverse of its original direction. the ball remains in contact with the bat for 2.0 ms. what is the magnitude of the average force exerted by the bat on the ball?
Answers: 1
You obtain a spectrum of an object in space. The spectrum consists of a number of sharp, bright emis...
History, 13.09.2021 21:00
English, 13.09.2021 21:00
Chemistry, 13.09.2021 21:00
English, 13.09.2021 21:00
Mathematics, 13.09.2021 21:00
Chemistry, 13.09.2021 21:00
Biology, 13.09.2021 21:00
Health, 13.09.2021 21:00
English, 13.09.2021 21:00