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3 years ago

What is statement can most likey be useing in the shock waves of atmoic bomb

Physics

1 answer:

Neko [114]3 years ago

8 0

Answer:

The initial energy emission occurs by 80% or more in the form of gamma rays but these are quickly absorbed and dispersed mostly by air in little more than a microsecond, converting gamma radiation into thermal radiation (thermal pulse ) and kinetic energy (shock wave) which are actually the two dominant effects in the initial moments of the explosion. The rest of the energy is released in the form of delayed radiation (fallout or fallout) and is not always counted when measuring the performance of the explosion.

Explanation:

High altitude explosions produce greater damage and extreme radiation flux due to lower air density (photons encounter less opposition) and consequently a higher blast wave is generated.

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A brick 25cm long ,9cm wide 5cm thick has a mass of 1000g determine the greatest pressure that can be exerted by the brick on a

lana66690 [7]

Answer:

The greatest pressure is 2178 Pa

Explanation:

Pressure

It's the force applied perpendicular to the surface of an object per unit area over which the force is distributed.

If F is the force applied and A is the surface area, the pressure is calculated as:

$\displaystyle P=\frac{F}{A}$

The brick has dimensions of 25 cm by 9 cm by 5 cm. There are three possible areas of contact:

$A_1=25*9 = 225 cm^2=0.0225\ m^2$

$A_2=25*5= 125 cm^2=0.0125\ m^2$

$A_3=9*5= 45 cm^2=0.0045\ m^2$

The brick has a mass of m=1000 g = 1 Kg and exerts a force equal to its weight when placed on a flat surface, thus:

F = m.g = 1 * 9.8 = 9.8 N

The greatest possible pressure will occur when the area is the least possible $(0.0045\ m^2)$ , since the pressure and the area are inversely proportional, thus:

$\displaystyle P_{max}=\frac{9.8}{0.0045}$

$\displaystyle P_{max}=2178 \ Pa$

The greatest pressure is 2178 Pa

8 0

2 years ago

The Andromeda Galaxy is faintly visible to the naked eye in the constellation Andromeda. Suppose instead it were located in the

Kaylis [27]

Answer:

a) We could not see it at all.

Explanation:

The most distant object that can be seen is the andromeda galaxy, which we may have a slight view of. The andromeda galaxy is a large galaxy that along with the previous two is also part of the local group. Spiral-type galaxy that is approximately 250,000 light years in diameter (more than twice the diameter of the Milky Way!) And is about 2.9 million light years away from our galaxy. Because of its distance, we have difficulty visualizing this galaxy, we would have this difficulty even if the andromeda galaxy was in the center of the Milky Way, but maintaining its current distance. That is, even if the andromeda galaxy were located in the same direction in space as the center of the Milky Way (but still at its current distance), we could not see it at all.

8 0

3 years ago

A wheel, starting from rest, rotates with a constant angular acceleration of 2.80 rad/s2. During a certain 5.00 s interval, it t

igomit [66]

Answer:

a) time t1 = 2.14s

b) initial angular speed w1 = 6 rad/s

Explanation:

Given that;

Initial Angular velocity = w1

Angular distance = s = 65 rad

time = t = 5 s

Angular acceleration a = 2.80 rad/s^2

Using the equation of motion;

s = w1t + (at^2)/2

w1 = (s-0.5(at^2))/t

Substituting the values;

w1 = (65 - (0.5×2.8×5^2))/5

w1 = 6rad/s

Time to reach w1 from rest;

w1 = at1

t1 = w1/a = 6/2.8 = 2.14s

a) time t1 = 2.14s

b) initial angular speed w1 = 6 rad/s

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4 years ago

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Convert 22°c to fahrenheit

posledela

The answer is:
71.6 °F

7 0

3 years ago

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How many minutes in 1 hour

fgiga [73]

Answer:

Explanation:

Every 60 minutes is an hour

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3 years ago

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