Object a is stationary while objects b and c are in motion. forces from object a do 20 j of work on object b and -5 j of work on object c. forces from the environment do 4 j of work on object b and 8 j of work on object c. objects b and c do not interact. what are δktot and δu if (a) objects a, b, and c are defined as separate systems and (b) one system is defined to include objects a, b, and c and their interactions?
Answers: 1
Physics, 22.06.2019 00:40
The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.
Answers: 1
Physics, 22.06.2019 14:30
Which of the following changes will increase the capacitance of a parallel-plate capacitor? (there could be more than one correct choice.) a) increase the charge on the plates b) decrease the poten5al between the plates c) increase the potential between the plates d) introduce a dielectric material between the plates e) decrease the separation between the plates
Answers: 3
Physics, 22.06.2019 19:30
Coal contains energy. a. light b. kinetic c. chemical d. mechanical
Answers: 1
Object a is stationary while objects b and c are in motion. forces from object a do 20 j of work on...
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