Engineering, 11.07.2019 03:30 24hudsonmoss
If i add 30j of heat to a system so that the final temperature of the system is 300k, what is the change in entropy of the system? a)-1 j/k b)- 3 j/k c)- 1 j/k d)- 9 j/k e)- 10 j/k
Answers: 2
Engineering, 04.07.2019 19:10
Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?
Answers: 3
Engineering, 04.07.2019 19:10
Which of the following is the most important advantage of a large field of view? a. allows larger areas to be examined b. relieves eyestrain c. minimizes parallax errors. d. increases precision in proportion to the in- crease in field of view
Answers: 2
Engineering, 05.07.2019 10:10
What is the correct way to measure the overall length of a boat? measure from the tip of the bow to the highest point on the gunwale. measure from the tip of the bow in a straight line to the stern of the boat. measure from the tip of the bow in a straight line to the back seat. measure from port to starboard at the boat's widest point.
Answers: 1
Engineering, 06.07.2019 02:30
A75mm diameter shaft is supported in a journal bearing 75mm long with a diametral clearance of 0. 1mm. it supports a radial load of 1000 n and is lubricated with sae 50 oil at 70°c. find the friction torque and the power loss when the crankshaft rotates at 2900 rev/min.
Answers: 1
If i add 30j of heat to a system so that the final temperature of the system is 300k, what is the ch...
Mathematics, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
English, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
Social Studies, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
Mathematics, 23.12.2020 07:30
Computers and Technology, 23.12.2020 07:30