![subject](/tpl/images/cats/fizika.png)
Physics, 28.06.2019 19:30 latezwardjr15
Aball having a mass of 500ghits wall with a 10m/s velocity. wall applies 4000 n force to the ball and it turns back with 8m/s velocity . what it the ball- wall contact ?
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Other questions on the subject: Physics
![image](/tpl/images/cats/fizika.png)
Physics, 21.06.2019 22:00, markyyy53
Aroll in a paper machine is powered by a separately excited dc machine. operating point 1 (under load): the roll typically operates at 764 rpm and must provide 301 nm of torque to oppose the load of the paper. the armature voltage is 230v for this operating point operating point 2 (no load): when the load is removed the speed of the roll increases to 900 rpm (the field characteristics are unchanged) la ea dev m (a) calculate the maximum torque (units of nm) that the motor can supply with this applied voltage (b) calculate the value of the armature resistance, ra (in ohms) (c) at operating point 1 (loaded condition), the field current, i, and the total input power (armature field), are measured to be to be 10 a and 28,600 w respectively. use this information to calculate the value of the field resistance, rf (in ohms). (d) (d) at operating point 1 (loaded condition), calculate the motor efficiency. express your answer as a percent to at least 2 significant digits. (d) if the field voltage is reduced by 1/2, calculate the new stall torque (in nm) of the motor (f). if the field voltage is reduced by 1/2, calculate the new no-load speed (in rad/sec)
Answers: 1
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 02:10, CrownedQueen
"an open tank has the shape of a right circular cone. the tank is 6 feet across the top and 5 feet high. how much work is done in emptying the tank by pumping the water over the top edge? note: the density of water is 62.4 lbs per cubic foot."
Answers: 2
![image](/tpl/images/cats/fizika.png)
Physics, 22.06.2019 16:40, dylan6981
The astronauts on the space shuttle flights experienced an acceleration of 29 m/s2 (about 3 "g's") during lift-off. what upward force must the astronaut's seat apply to the astronaut in order to cause this acceleration? assume the astronaut's mass is 70 kg, and compute this force when the acceleration is near the earth's surface so their weight equals latex: mg m g .
Answers: 3
You know the right answer?
Aball having a mass of 500ghits wall with a 10m/s velocity. wall applies 4000 n force to the ball an...
Questions in other subjects:
![Konu](/tpl/images/cats/mat.png)
![Konu](/tpl/images/cats/istoriya.png)
History, 06.03.2020 04:02
![Konu](/tpl/images/cats/fizika.png)
![Konu](/tpl/images/cats/biologiya.png)
Biology, 06.03.2020 04:03
![Konu](/tpl/images/cats/mat.png)
Mathematics, 06.03.2020 04:03
![Konu](/tpl/images/cats/fizika.png)
Physics, 06.03.2020 04:03
![Konu](/tpl/images/cats/biologiya.png)
![Konu](/tpl/images/cats/en.png)
![Konu](/tpl/images/cats/mat.png)