Physics, 23.10.2020 21:40, kayelynn003
A metal ball of mass 100 g is heated to 90 ° C and then cooled to 25 ° C. The heat lost in the process is 2.5 kJ. Another metal ball of mass 200 g is heated to 90 ° C and then cooled to 25 ° C. The heat lost in the process is 5.0 kJ. What can be concluded from the data?
Answers: 3
Physics, 22.06.2019 02:00, honeybaby675610
Askydiver weighing 140 lb (including equipment) falls vertically downward from an altitude of 19,000 ft and opens the parachute after 18 s of free fall. assume that the force of air resistance, which is directed opposite to the velocity, is of magnitude 0.55|v| when the parachute is closed and is of magnitude 14|v| when the parachute is open, where the velocity v is measured in ft/s. assume that acceleration due to gravity has magnitude 32 ft/s/s; remember that weight is the product of mass and gravitational acceleration. (a) find the speed of the skydiver when the parachute opens. (b) find the distance fallen before the parachute opens. (c) what is the limiting velocity vl after the parachute opens? (d) determine how long the sky diver is in the air after the parachute opens. (e) plot the graph of velocity versus time from the beginning of the fall until the skydiver reaches the ground.
Answers: 1
Physics, 22.06.2019 08:50, potatoismeh1
You are given a vector a = 125i and an unknown vector b that is perpendicular to a. the cross-product of these two vectors is a × b = 98k. what is the y-component of vector b?
Answers: 1
A metal ball of mass 100 g is heated to 90 ° C and then cooled to 25 ° C. The heat lost in the proce...
Mathematics, 08.02.2021 20:30
English, 08.02.2021 20:30
Mathematics, 08.02.2021 20:30