It is required to design a single stage Spur / helical gear reducer (According to the attached table). The gear box has an input power of 4.5 (kW), an input speed of 2500rpm (rpm), a transmission ratio of 2.5, and a service life of 15 (kh). the pressure angle is 20 o and the helix angle may be chosen between 20 o and 30 o . Detail drawings of a similar gear-box are shown on the following pages. The pinion can be integrated with (or mounted on) the driving shaft (5) . The gear is mounted on the driven shaft (3) by means of a feather 6x6x15 (11). Both shafts are supported on the casing through two ball bearings (e. g. D = 35 mm, B = 11). A guffro sealing (e.g. D = 25 mm, B = 7 mm) is used to prevent leakage of oil from both ends of input and output shafts. Covers are fixed to the casing of the gear box through 4 bolts (e.g. M3x8). the upper and lower parts of the casing are fixed together by means of ten M6x18. Also there are two positional pins 3x10 . You are asked to submit the following documents: a) A short technical report including your design and checking calculations. basically i need the first part which is designing a pinion and a gear meshed together and getting me a factor of safety for bending stress between 2.5 to 4~ and a factor of safety for contact stress between 1.2 to 1.4 Im stuck and i thought i could ask for help.
Go to http://phet.colorado.edu/simulations/sims.php?sim=Lasers and click on Run Now. 1) Laser medium basics.. A. Pumping a two state system. This simulation uses an “optical pump” as an energy source for a laser. Turn the light source on a medium level with the preset wavelength. What do you observe about the emitted photons? (Are they spontaneous emissions, stimulated emissions or both… and how can you identify this?) When you change the intensity of the light source to a very low level, what do you notice about the emitted photons? When you change the intensity of the light source to a very high level, what do you notice about the emitted photons? When you have the intensity at a medium level but decrease the lifetime, what do you notice about emissions? When you have the intensity at a medium level but increase the lifetime, what do you notice about emissions? When you tune the light to a color that has a lower energy than the preset color, what do you observe? When you tune the light to a color that has a higher energy than the preset color, what do you observe? B. Pumping a three state system. When you change to a three state system, can you still only pump electrons to a higher energy level with the red light or is there another light energy that works now? Explain. What characteristics do you observe about the emission events when you pump with the additional color? (Are all emissions the same color, are they stimulated, spontaneous, etc.?) Click on “display photons emitted from upper state.”) What transition do these photons represent, and what region of the spectrum are these photons in? When you increase the lifetime of the upper state what happens to the emission events? When you in increase the lifetime of the lower state what happens to the emission events?
Watch the video in the link below then select a step in the rube goldberg device and qualitatively describe what is going on during the selected step and the transactions to/ from the neighboring steps. https://www.youtube.com/watch?v=agSY2r7iNiA
i need someone do this homework for me , and i need it correct 100% pls 1- A muon (an elementary particle) enters a region with a speed of 5.34 × 106 m/s and then is slowed at the rate of 2.16 × 1014 m/s2. How far does the muon take to stop? Number the tolerance is +/-2% 2-The brakes on your automobile are capable of creating a deceleration of 4.8 m/s2. If you are going 126 km/h and suddenly see a state trooper, what is the minimum time in which you can get your car under the 90 km/h speed limit? (The answer reveals the futility of braking to keep your high speed from being detected with a radar or laser gun.) Number the tolerance is +/-2% 3-In the figure here, a red car and a green car move toward each other in adjacent lanes and parallel to an x axis. At time t = 0, the red car is at xr = 0 and the green car is atxg = 221 m. If the red car has a constant velocity of 22.0 km/h, the cars pass each other at x = 44.0 m. On the other hand, if the red car has a constant velocity of 44.0 km/h, they pass each other at x = 76.4 m. What are (a) the initial velocity and (b) the (constant) acceleration of the green car? Include the signs. (a) Number (b) Number 4-A startled armadillo leaps upward, rising 0.530 m in the first 0.218 s. (a) What is its initial speed as it leaves the ground? (b) What is its speed at the height of 0.530 m? (c) How much higher does it go? Use g=9.81 m/s2. (a) Number (b) Number (c) Number 5- Flying Circus of Physics In a forward punch in karate, the fist begins at rest at the waist and is brought rapidly forward until the arm is fully extended. The speed v(t) of the fist is given in the figure for someone skilled in karate. How far has the fist moved at (a) time t = 50 ms and (b) when the speed of the fist is maximum? (a) Number (b) Number
I need someone help me out with the physic lab report purpose you have to write purpose, Procedure: Part 1 Resistor Circuits, Part 2 Characteristic Curves, calculation in data, graphs, Analysis and in conclusion
Click on the link below to download the lab activity as a Microsoft Word Document or PDF. You may either print it out and complete it, or type all of your responses on the Word document, however note that some labs require you to show calculations or draw a picture, which are much harder on Word than by hand.
A ranger in a national park is driving at 49 km/h when a deer jumps onto the road 67 m ahead of the vehicle. After a reaction time of t s, the ranger applies the brakes to produce a deceleration of 3.5 m/s2. What is the maximum reaction time al- lowed if the ranger is to avoid hitting the deer? Answer in units of s
the toy car runs off the edge of a table that is 1.225-m high.the car lands 0.400m from the base of the table. A) how long did it take the car to fall? B) How fast was the car going on the table?
Exploring Creation with Physics 2nd edition module 14 practice problem 7: a +3.8mC charged particle (m=5.0kg) is shot with an initial velocity of 245 m/sec towards a +1.5mC stationary charge. If the particle starts out 1.2 meters from the stationary charge, how close will it come to the charge before stopping and moving away? Also, does anyone know where I could find this solution key for free online? Thanks!
