What is the expected nuber of failures in 100 fligghts if a rocket engine has a failure rate if 0.01%?
What is the expected nuber of failures in 100 fligghts if a rocket engine has a...
Problem 1 A model rocket has engine with an average thrust of 6.92 N. The rocket mass is 72.5g,which includes fuel mass 22.3 g. The duration of fuel burning is 2.52 s a) What is the average exhaust speed v, of the engine? (12 points) b) What is the final speed i of this rocket if it were to be fired from International Space Station with initial speed v-7660 m/s? Assume the fuel burns at a constant rate (13 points)...
PLEASE SHOW YOUR WORK A model rocket engine has an average thrust of 5.26 N. It has an initial mass of 25.4 g, which includes fuel mass of 12.5 g. The duration consumed.) of its burn is 1.90 s. (Assume all the fuel is (a) What is the average exhaust speed of the engine? m/s (b) This engine is placed in a rocket body of mass 44.5 spacewalk? Assume the fuel burns at a constant rate. g. What is the...
1. One hundred (100) parts were tested for 10 hours, and 10 failures occurred during the test. The times when the failures occurred are 1, 3, 6, 2, 3, 6, 8, 9, 2, and 1 hour, respectively. What is the failure rate? 2. Field data have indicated that Unit A has a failure rate of 0.0004 failure per hour. Calculate the reliability of the unit for a 150-hour mission.
11.3.81 Q22 In a certain four-engine vintage aircraft, now quite unreliable, each engine has a 12% chance of failure on any flight, as long as it is carrying its one-fourth share of the load. But if one engine fails, then the chance of failure increases to 24% for each of the other three engines. And if a second engine fails, each of the remaining two has a 36% chance of failure. Assuming that no two engines ever fail simultaneously, and...
At time t=0 a 2150 kg rocket in outer space fires an engine that exerts an increasing force on it in the +x−direction. This force obeys the equation Fx=At2, where t is time, and has a magnitude of 889.66 N when t=1.25 s. What impulse does the engine exert on the rocket during the 2.9 s interval starting 2.00 s after the engine is fired?
A 130-kg (including all the contents) rocket has an engine that produces a constant vertical force (the thrust) of 1750 N. Inside this rocket, a 14.3-N electrical power supply rests on the floor. (a) Find the acceleration of the rocket. (b) When it has reached an altitude of 120 m, how hard does the floor push on the power supply? (Hint: Start with a free-body diagram for the power supply.)
A model rocket flies straight up into the air. After the engine burns out, a spring pushes the bottom and top of the rocket apart. The velocity just before the rocket separates is vi, going up. Immediately after the rocket separates, the bottom part has speed vb = 0. If the top has mass mt and the bottom has mass mb, what is the energy provided by the spring? Assume all of the energy stored in the spring was released...
The time between failures of a laser is known to have the exponential distribution with the mean of 500 hours a) What is the probability there are no failures in 1000 hours b) What is the expected time until the 3rd failure?
A rocket engine in deep space is programmed to provide a thrust force given by the following function of time: ?(?)=30?F(t)=30t The rocket has a mass of 80 kg. A) How far will it have traveled after 9.1 seconds, assuming it starts from rest?
The time between failures of a laser in a machine, X, is exponentially distributed with a mean of 25,000 hours. In other words, 1 a= (failures/hour). 25,000 Exponential Distribution (pdf): f(x) = 1.0-\x, for x > 0. (a) What is the probability that the next failure occurs in 27,000 hours? (b) What is the expected time until the third failure? (c) What is the probability that the time until the third failure exceeds 25,000 hours?