A ball is thrown straight up from ground level. It passes a 2-m-high window. The bottom of the window is 7. 5 m off the ground. The time that elapses from when the ball passes the bottom of the window on the way up, to when it passes the top of the window on the way back down is 1. 3 s.
Required:
What was the ball’s initial velocity?
Answers: 2
Physics, 22.06.2019 10:50, afonseca73
Asheet of steel 1.5 mm thick has nitrogen atmospheres on both sides at 1200oc and is permitted to achieve a steady-state diffusion condition. the diffusion coefficient for nitrogen in steel at this temperature is 6 x 10- 11 m2 /s, and the diffusion flux is found to be 1.2 x 10-7 kg/m2 -s. also, it is known that the concentration of nitrogen in the steel at the high-pressure surface is 4 kg/m3 . how far into the sheet from this high-pressure side will the concentration be 2.0 kg/m3 ? assume a linear concentration profile.
Answers: 3
Physics, 22.06.2019 16:40, odalysesquermon
The force needed to overcome static friction is usually less than that needed to overcome kinetic friction. true or false?
Answers: 1
A ball is thrown straight up from ground level. It passes a 2-m-high window. The bottom of the windo...
Physics, 27.11.2021 07:00
Mathematics, 27.11.2021 07:00
Biology, 27.11.2021 07:00
Social Studies, 27.11.2021 07:10