Physics, 11.04.2020 03:21, superpuglover5924
Two students are each given a spherical balloon that has a long string attached and is filled with an unknown gas whose density is referred to by the variable rhoG. The filled balloons each have a radius referred to by the variable R and a volume referred to by the variable V, and the balloons rise when released. A small valve is fitted to each balloon to allow the balloon to be deflated in a controlled manner. part (a) The string and the balloon itself (not including the gas) have a combined known mass of MB. Derive an expression for the acceleration of the balloon when it is released in terms of the given quantities and physical constants, as appropriate. Air resistance is negligible, and the known density of air is rhoA. part (b) The first student is given a stopwatch and a tape measure and asked to use only this equipment in an experiment to determine the density of the gas inside the balloon from a graph of the data. Describe an experimental procedure the student can use to accomplish this.
Answers: 2
Physics, 22.06.2019 13:30, sukiyoshi10
Global warming will produce rising sea levels partly due to melting ice caps but also due to the expansion of water as average ocean temperatures rise. to get some idea of the size of this effect, calculate the change in length of a column of water 1.00 km high for a temperature increase of 1.00ΒΊc. note that this calculation is only approximate because ocean warming is not uniform with depth. (answer in Γ10^{-3} β3 m)
Answers: 1
Physics, 22.06.2019 16:50, anaismami1
During a medieval siege of a castle, the attacking army uses a trebuchet to hurl heavy stones at the castle walls. if the trebuchet launches the stones with a velocity of at an angle of 50.0Β°, (a) how long does it take the stone to hit the ground? (b) what is the maximum distance that the trebuchet can be from the castle wall to be in range? (c) how high will the stones go? show all your work.
Answers: 2
Two students are each given a spherical balloon that has a long string attached and is filled with a...
Mathematics, 02.07.2020 20:01