Two students are on a balcony 19.6 m above the street. one student throws a ball vertically downward at 14.7 m/s; at the same instant, the other student throws a ball ver- problems 53 tically upward at the same speed. the second ball just misses the balcony on the way down. (a) what is the difference in the two ballsâ time in the air? (b) what is the velocity of each ball as it strikes the ground? (c) h
Answers: 3
Physics, 22.06.2019 22:50, mdg5605
The illuminance of a surface varies inversely with the square of its distance from the light source. if the illuminance of a surface is 120 lumens per square meter when its distance from a certain light source is 6 meters, by how many meters should the distance of the surface from the source be increased to reduce its illuminance to 30 lumens per square meter?
Answers: 3
Physics, 23.06.2019 00:30, ehaynie
Which of the following statements are true for an isothermal process? check all that apply. - during an isothermal process, the work done by the gas equals the heat added to the gas. - during an isothermal process, the internal energy of the system changes. - an isothermal process is carried out at constant temperature. - an isothermal process is carried out at constant pressure. - an isothermal process is carried out at constant volume.
Answers: 1
Physics, 23.06.2019 02:40, jackphilander2285
The two metal spheres in the figure are connected by a metal wire with w switch in the middle. initially the switch is open. sphere 1, with the larger radius, i'd given a positive charge. sphere 2, with the smaller radius, is neutral. then the switch is closed. afterward, sphere 1 has charge q1, is at potential v1 and the electric field strength at its surface is e1. the values for sphere 2 are q2, v2, and e2. a. is v1 < ,> , or = to v2? explain. b. is q2 < , > , or = explain? c. is e1 < ,> ,or = to e2? explain?
Answers: 1
Two students are on a balcony 19.6 m above the street. one student throws a ball vertically downward...
Mathematics, 04.11.2019 06:31
Mathematics, 04.11.2019 06:31
Mathematics, 04.11.2019 06:31
Mathematics, 04.11.2019 06:31
Mathematics, 04.11.2019 06:31