3 years ago

Distinguish between pressure and force

1 answer:

3 0

Force is (mass × acceleration) measured in Newton

Pressure is the 'force' per unit area measured in Newton/m^2 (pascal)

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In that case the ratio is
2v/2L1 : 3v/4L2 = 4L2 : 3L1 .

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3 years ago

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3 years ago

contractor will use a package emulsion having a specific gravity of 1.25 and relative bulk strength of 130 to open an excavation

tester [92]

Answer:

The burden distance is 7 ft

Solution:

As per the question:

Specific gravity of package emulsion, $SG_{E} = 1.25$

Specific gravity of diabase rock, $SG_{R} = 2.76$

Diameter of the packaged sticks, d = 3 in

Now,

To calculate the first trail shot burden distance, B:

$B = [\frac{2SG_{E}}{SG_{R}} + 1.5]\times d$

$B = [\frac{2\times 1.25}{2.76} + 1.5]\times 3 = 7.22$

B = 7 ft

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3 years ago

A person who is properly constrained by an over-the-shoulder seat belt has a good chance of surviving a car collision if the dec

postnew [5]

Answer:

Distance = 0.738 m

Explanation:

Solution:

First convert Km/h into m/s.

75 km/h * 1000 m/km * 1 hr/3600 sec = 20.8333 m/s

According to third equation of motion:

$Vf^{2}$ – $Vi^{2}$ = 2 * acceleration * distance

Vf= final velocity

Vi= initial velocity

putting values in third equation of motion....

$0.2^{2}$ – $20.8333^{2}$ = 2 * (-30 * 9.8) * distance

note:

negative sign is due to deceleration

Distance = 0.738 m

8 0

3 years ago