Physics, 30.03.2020 18:01 spazzinchicago
The pulley has radius R and moment of inertia I. The rope does not slip over the pulley. The coefficient of friction between block A and the tabletop is 4k. the system is released from rest, and block B descends. a) Use energy methods to calculate the speed of block B as a function of the distance d that it has descended. b) Use forces and torques to calculate the speed of block B as a function of the distance d that it has descended.
Answers: 3
due to the height covered= KE gained by 
+ frictional heat gained by 
= 
Another question on Physics
Physics, 22.06.2019 19:50
The heater element of a 120 v toaster is a 5.4 m length of nichrome wire, whose diameter is 0.48 mm. the resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ω·m. the toaster is operated at a voltage of 120 v. (a) what is the power drawn by the toaster? (b) if the cost of electricity is 12 ¢ per kilowatt-hour, and it takes 2 minutes to toast bread, how much does it cost for toasted bread? (c) when the heater element is at room temperature, is the resistivity in the nichrome wire greater than, less than, or equal to it’s resistivity when at operating temperature? explain.
Answers: 3
Physics, 22.06.2019 23:20
Consider each of the electric- and magnetic-field orientations given next. in each case, what is the direction of propagation of the wave? a)\vec ein the +xdirection,\vec bin the +ydirection. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction b)\vec ein the -y direction,\vec bin the +x choose+ x direction- x direction+ y direction- y direction+ z direction- z direction c)\vec ein the +z direction,\vec bin the -x direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction d)\vec ein the +y direction,\vec bin the -z direction. choose+ x direction- x direction+ y direction- y direction+ z direction- z direction
Answers: 3
Physics, 23.06.2019 02:30
What are two examples of phase changes that skip a phase during transition?
Answers: 1
You know the right answer?
The pulley has radius R and moment of inertia I. The rope does not slip over the pulley. The coeffic...
Questions
Mathematics, 15.04.2020 19:37
History, 15.04.2020 19:38
Physics, 15.04.2020 19:38
Mathematics, 15.04.2020 19:38
Social Studies, 15.04.2020 19:38
Business, 15.04.2020 19:39
History, 15.04.2020 19:39
