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3 years ago

If the same pressure is exerted over a greater area will more of less force result? Group of answer choices :

Physics

1 answer:

Zigmanuir [339]3 years ago

8 0

Answer:

More force

Explanation:

Pressure and force are related by the equation:

$p=\frac{F}{A}$

where

p is the pressure

F is the force

A is the area

We can re-arrange the equation as

$F=pA$

In this problem, the pressure is kept the same (p' = p) while the area is increased. As we can see from the previous equation, the force applied is directly proportional to the area: therefore, a greater area means also a greater force.

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Compute the longitudinal strength of an aligned carbon fiber-epoxy matrix composite having a 0.25 volume fraction of fibers, ass

zmey [24]

Answer:

632.5 MPa

Explanation:

$\sigma_{m}$ = Matrix stress at fiber failure = 10 MPa

$V_f$ = Volume fraction of fiber = 0.25

$\sigma_f$ = Fiber fracture strength = 2.5 GPa

The longitudinal strength of a composite is given by

$\sigma_{cl}=\sigma_{m}(1-V_f)+\sigma_fV_f\\\Rightarrow \sigma_{cl}=10(1-0.25)+(2.5\times 10^3)\times 0.25\\\Rightarrow \sigma_{cl}=632.5\ MPa$

The longitudinal strength of the aligned carbon fiber-epoxy matrix composite is 632.5 MPa

8 0

2 years ago

Air will break down (lose its insulating quality) and sparking will result if the field strength is increased to about 3 × 106 N

CaHeK987 [17]

Answer:

Explanation:

Given

Electric Field Strength $E=3\times 10^6\ N/C$

When a charged particle enters the Electric field it Experience a force in the direction of electric field (for positive charge and vice-versa for negative charge)

charge on Electron $q=1.6\times 10^{-19}\ C$

mass of electron $m=9.1\times 10^{-31}\ kg$

Force $F=q\times E$

$F=1.6\times 10^{-19}\times 3\times 10^6$

$F=4.8\times 10^{-13}\ N$

acceleration of electron $a=\frac{F}{m}$

$a=\frac{4.8\times 10^{-13}}{9.1\times 10^{-31}}$

$a=0.527\times 10^{18}\ m/s^2$

6 0

2 years ago

When electrons are accelerated by 2450 V in an electron microscope, they will have

Anni [7]

I think the answer to this is 0.811nm

5 0

2 years ago

Refraction can occur only when light is _____.

Lorico [155]

Answer:

Refraction can occur only when light is transmitted

8 0

2 years ago

Maria is camping when she starts to smell smoke. She turns on her radio and hears that a forest fire is heading her way. How can

wolverine [178]

Answer:

Her nervous system will send signals to tell her arms and legs to start moving. Her respiratory system will increase her breathing rate, the extra oxygen will be delivered throughout the circulatory system to her body tissues, her muscles will start to interact with her skeletal system for movement.

Explanation:

I just took this practice so hopefully it's right.

7 0

2 years ago