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Lana71 [14]
4 years ago
7

Estimate the theoretical fracture strength of a brittle material if it is known that fracture occurs by the propagation of an el

liptically shaped surface crack of length 0.47 mm and that has a tip radius of curvature of 0.001 mm when a stress of 1050 mpa is applied.

Physics
1 answer:
julia-pushkina [17]4 years ago
4 0
The solution as per the attached photo.

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Calculate the magnitude of the force between two 3.60 mC point challenges 9.3 cm apart
vladimir1956 [14]

Q = magnitude of charge on each of the two point charge = 3.60 mC = 3.60 x 10⁻³ C

r = distance between the two point charges = 9.3 cm = 0.093 m

k = constant = 9 x 10⁹ Nm²/C²

F = magnitude of the force between the two point charges = ?

according to coulomb's law , force between two charges is given as

F = k Q²/r²

inserting the values

F = (9 x 10⁹) (3.60 x 10⁻³)²/(0.093)²

F = 1.35 x 10⁷ N

3 0
3 years ago
A jogger runs 300 meters due east and then turns and runs 500 meters due west.
valentina_108 [34]
It’ll be 200 meters West because 500-300=200 and The west direction has the greatest force you could say ... Anytime you have a question asking about displacement you subtract then use the direction with the greatest number ..
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3 years ago
Everything we know about stars comes from studying their _____.
serious [3.7K]
I think its radiation 
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3 years ago
Air having a pressure of 40 psig and a volume of 8 cu ft expands isothermally to a pressure of 10 psig. Find the external work p
DerKrebs [107]

Answer:

357.6 lb-ft

Explanation:

V = Volume = 8 ft³

dP = Change in pressure = (40-10) = 30 psig

Work done is given by

W=VdP\\\Rightarrow W=8\times (40-10)\\\Rightarrow W=240\ psig.ft^3

30\ psig=44.7\ psi\\\Rightarrow 1\ psi=\dfrac{30}{44.7}

So, converting to ft-lb

\dfrac{240}{\dfrac{30}{44.7}}=357.6\ lb-ft

The external work performed during the expansion is 357.6 lb-ft

7 0
4 years ago
A lightbulb is rated to how a power output of 80 w, if the lightbulb is running for 600 seconds, how much energy (work) is it us
enyata [817]

Answer:

Light bulbs are rated in watts to indicate how much energy they consume. Does the wattage of a light bulb have anything to do with brightness? ... In general, that works well with traditional incandescent light bulbs. ... It's also worth noting that kW can be synonymous with “demand” if you're talking to a utility ...

Explanation:

Light bulbs are rated in watts to indicate how much energy they consume. Does the wattage of a light bulb have anything to do with brightness? ... In general, that works well with traditional incandescent light bulbs. ... It's also worth noting that kW can be synonymous with “demand” if you're talking to a utility ...

5 0
3 years ago
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