An
underground military base is designed to withstand up to three
direct hits from air-to- surface...
An
underground military base is designed to withstand up to three
direct hits from air-to- surface missiles. An enemy aircraft armed
with missiles, each having a 30% chance of a direct hit, starts
firing at the base.
What is the expected number of missiles needed to destroy the
base?
Find the variance, standard deviation and the second moment of
the aircraft destroying the base.
Solutions
Expert Solution
Therefore,
Expected number of missiles needed to destroy the base = 0.9 = 1
( approx. )
Variance = 0.63
Standard Deviation = 0.794 ( rounded up to 3 decimal places
)
A football is kicked straight up into the air; it hits the
ground 3.6 s later.
Part A
What was the greatest height reached by the ball? Assume it is
kicked from ground level.
Express your answer with the appropriate units.
ymax
ymax
=
nothingnothing
SubmitRequest Answer
Part B
With what speed did it leave the kicker's foot?
A 30N ball has been thrown vertically up ward into the air
from reference surface. It has been observed that when the ball is
20m above the surface, its velocity reaches 30m/s. Find:
1- Theball'svelocityjustasitleftthesurface
2- Themaximumheighttheballreaches.
A 30N ball has been thrown vertically up ward into the
air from reference surface. It has been observed that when the
ball is 20m above the surface, its velocity reaches
30m/s. Find:
(a) The ball's velocity just as it left the
surface.
(b) The maximum height the ball reaches.
A ball is shot up from a surface that is 20 m above the surface
with an initial speed of 10 m/s.
1. What is the magnitude of the ball's displacement from the
surface after 3.00 second has elapsed?
2. What max height will the ball reach from the surface of the
earth?
3. How much time elapses between the throwing of the ball and
its reaching to the earth?
4. Calculate the magnitude of the velocity of the ball...
Describe three different respiratory systems that are designed
to work in air, in soil, or water environments. Include in your
descriptions the limitations and advantages of these three
different respiratory system designs.
1. an undulated surface that is designed to reduce friction by
eliminating wear particles from the sliding interface. The
interface is subjected to normal force N. The sliding speed is so
low that the interfacial temperature rise is negligible relative to
the melting point of the material. We are planning to use metals
for the sliders.
a. Determine the optimum dimensions of the undulated
topography.
b. Discuss the consequence of deviating from the optimum
geometry.
2. A conical asperity is...
an undulated surface that is designed to reduce friction by
eliminating wear particles from the sliding interface. The
interface is subjected to normal force N. The sliding speed is so
low that the interfacial temperature rise is negligible relative to
the melting point of the material. We are planning to use metals
for the sliders.
a. Determine the optimum dimensions of the undulated
topography.
b. Discuss the consequence of deviating from the optimum
geometry.
For the past
112112
years, a certain state suffered
2828
direct hits from major (category 3 to 5) hurricanes. Assume
that this was typical and the number of hits per year follows a
Poisson distribution. Complete parts (a) through (d).
(a) What is the probability that the state will not be hit by
any major hurricanes in a single year?
The probability is
1-The number of hits to a website follows a Poisson process.
Hits occur at the rate of...
For the past 104 years, a certain state suffered 27 direct hits
from major (category 3 to 5) hurricanes. Assume that this was
typical and the number of hits per year follows a Poisson
distribution. Complete parts (a) through (d). a) What is the
probability that the state will not be hit by any major hurricanes
in a single year? The probability is nothing. (Round to four
decimal places as needed.) (b) What is the probability that the
state will...
Assessment from the movie "Up in the Air" –
evaluate the effectiveness of the
implementation and execution of
the HR practices. Give your opinion and provide justification.