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AnnZ [28]
3 years ago
14

Describe any major landmarks (buildings, bridges, historical sites, etc.) that were destroyed during the valdivia earthquake.

Physics
1 answer:
yawa3891 [41]3 years ago
6 0

Answer:

Homes, Workplaces, Statues, Meuseums

Explanation:

if you did look into it you would know after the earthquake there was a tsunami which flooded alot of places, this made many homeless, jobless, and many lossing vaklueable things

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A woman falls to the ground while wearing a parachute. The air resistance of the parachute is 500N. If the woman falls at a cons
alina1380 [7]

the answer is less than 500 n

6 0
3 years ago
An office worker has his lunch on the 53rd floor of an office building. In which case is the gravitational potential energy of t
Ann [662]

Options

a. The worker carried the lunch up to the 53rd floor in the elevator.

b. The worker got a ride in a helicopter to the top of the 68-floor building and then carried the lunch down in the elevator to the 53rd floor?

c. The Worker carried it up the stairs to the 53rd floor.

d. Gravitational potential energy does not depend on the path taken.

Answer:

The gravitational Energy would remain the same in all cases.

Explanation:

Gravitational Energy is a conservative energy and its potential energy comes from gravitational actions.

An instance is when someone lifts a weight from the floor to a certain height and then dropped the weight back to the floor; the work done by the field will not be altered at all; it'll be the same throughout.

If otherwise, it'll be against thermodynamics 2nd law of physics because the object would have remaining energy after returning to the starting point,

For this reason, the gravitational potential energy only depends from the height, and is independent from the path taken to reach there.

4 0
3 years ago
According to the Theory of Continental Drift, what did the Earth’s continents look like 255 million years ago? What is the name
dmitriy555 [2]
The name of this landmas is known as <em></em>Pangaea, was a supercontinent that existed during the late Paleozoic and early Mesozoic eras. It formed approximately 300 million years ago and began to break apart after about 100 million years. 

Theres an image of how this supercontinet looked

3 0
3 years ago
Read 2 more answers
A house at the bottom of a hill is fed by a full tank of water 5m deep and connected to the house by a pipe that is 110m long at
yawa3891 [41]

Answer:

a) p=964178.7\ Pa

b) h=98.2853\ m

Explanation:

Given;

  • depth of the water-tank, d=5\ m
  • length of the pipe, l=110\ m
  • inclination of the pipe from the horizontal, \theta =58^{\circ}

a)

Now the effective vertical height of the water column from the free surface of the water to the bottom of the pipe at house:

h=d+l.\sin\theta

h=5+110\sin58

h=98.2853\ m

Now the pressure due to effective water head:

p=\rho.g.h

where:

\rho= density of the liquid, here water

g= acceleration due to gravity

h= height of the liquid column

p=1000\times9.81\times 98.2853

p=964178.7\ Pa

b)

Now the height of water corresponding to this pressure will be the same as the effective water head by the law of conservation of energy.

h=98.2853\ m

6 0
3 years ago
Copper and aluminum are being considered for a high-voltage transmission line that must carry a current of 51.5 A. The resistanc
Sliva [168]

Answer:

a).Jcu= 436.44x10^{3} \frac{A}{m^{2}}

b).λcu=1.05728 \frac{kg}{m}

c).Jal= 274.66 x10^{3} \frac{A}{m^{2}}

d).λcu=0.487 \frac{kg}{m}

Explanation:

a).

ζcu=1.7x10^{-8}Ωm

ζal=2.76x10^{-8}Ωm

A=\frac{w}{R}

wcu=ζcu*l

Acu=\frac{1.7x10^{-8}*1000}{0.144} =1.18x10^{-4} m^{2}

J=\frac{I}{Acu}=\frac{51.5A}{1.18x10^{-4}m^{2}} \\J=436.44x10^{3} \frac{A}{m^{2}}

b).

mass per unit Copper

λcu=Dcu*Acu

λcu=8960 \frac{kg}{m^{3}}*1.18x10^{-4} m^{2}

λcu=1.05728 \frac{kg}{m}

c).

wal=ζal*l

Aal=\frac{2.7x10^{-8}*1000}{0.144} =0.187x10^{-3} m^{2}

J=\frac{I}{Aal}=\frac{51.5A}{0.187x10^{-3}m^{2}} \\J=274.66x10^{3} \frac{A}{m^{2}}

d).

mass per unit Aluminum

λal=Dal*Aal

λal=2600 \frac{kg}{m^{3}}*0.1875x10^{-3} m^{2}

λcu=0.487 \frac{kg}{m}

3 0
3 years ago
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