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cluponka [151]
3 years ago
8

Using your own worlds, write a brief paragraph about: (1) why substitutional vacancies exist in metals and (2) why the equilibri

um concentration of substitutional vacancies increases with temperature.
Physics
1 answer:
Talja [164]3 years ago
6 0
Ummmmmmmmmm is this what subject??????? Because I hv no idea unless u tell me a subject
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A free-falling projectile is launched from the ground and has a hangtime of 6 seconds before hitting the ground. How high did it
grandymaker [24]

1A)  

x=v0x*t=v0cosθ*t  

x=52co31*3.2=142.6 m  

1B)  

y0=1/2gt^2-v0y*t=1/2gt^2-v0sinθt  

y=0.5*9.8*3.2^2-52*sin31*3,2=23.4 m  

2A)  

x=2v0^2sin(2θ)/g  

v0=[xg/2sin(2θ)]^1/2=14.4 m/s  

the initial speed relative to the ground is  

v=v0-4.4=10 m/s  

2B)  

fly time is  

t=2voy/g  

t=2*14.4/9.8=2.94  

2C)  

mgy=1/2mv0y^2  

y=v0y^2/(2g)=10.58 m

7 0
3 years ago
Two Carnot air conditioners, A and B, are removing heat from different rooms. The outside temperature is the same for both rooms
lakkis [162]

Answer:

(a)  333.77 J

(b) 237.85 J

(c) 4763.77 J

(d) 4667.85 J

Explanation:

Temperature of source, TH = 314 K

Temperature of A, Tc = 292 K

Temperature of B, Tc' = 298 K

heat taken out, Qc = 4430 J

Let the heat deposited outside is QH and QH' by A and B respectively.

\frac{Q_H}{Q_c}=\frac{T_H}{T_c}\\\\Q_H = \frac{4430\times314}{292}=4763.77 J

Now

\frac{Q_H'}{Q_c}=\frac{T_H}{T_c'}\\\\Q_H' = \frac{4430\times314}{298}=4667.85 J

(a) Work done for A

W = QH - QC = 4763.77 - 4430 = 333.77 J

(b) Work done for B

W' = QH' - Qc = 4667.85 - 4430 = 237.85 J

(c) QH = 4763.77 J

(d) QH' = 4667.85 J

4 0
3 years ago
What would happen if you charged a balloon by
Luda [366]

When you rub a balloon against your hair or clothing, electrons that were previously on the hair/clothing will "jump" onto the balloon. Therefore, the balloon now has a negative charge accumulated on its surface.

When you bring that balloon near another balloon with a neutral charge, they will stick to each other, because the electrons on the surface will be attracted to the positive charges on the other. The positive charges that were previously randomly oriented now line up at the surface. However, after some time, the electrons move around back to their former random positions.

8 0
3 years ago
Convert 365 years to days. Using one step conversion. :) Please help w this
nikitadnepr [17]

Answer:

133225

Explanation:

6 0
3 years ago
Read 2 more answers
A standard electrical outlet has three wires connected to it: the hot, the neutral, and the ground. There is no potential differ
Over [174]

Answer:

The neutral wire and the ground wire.

Explanation:

The black wire is the hot wire

The neutral wire provides the return path for the current provided by the hot wire.

The ground wire is connected to any metal parts in an appliance for example microwave.

A standard electrical outlet has three wires connected to it: the hot, the neutral, and the ground. There is no potential difference between the neutral wire and the ground wire.

7 0
3 years ago
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