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3 years ago

When heat is removed from a substance , describe how the molecules are affected

Physics

2 answers:

kkurt [141]3 years ago

6 0

I believe they would electron rate would slow down and the molecules would shrink.

I am almost positive that this is correct. I hope it helps!

AnnyKZ [126]3 years ago

5 0

Explanation: When heat is removed from a substance The electron rate slows down and the molecules shrink.

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A solid silver sphere of radius a = 2.5 cm has a net charge Qin = - 3.0 mC. The sphere is surrounded by a concentric copper sphe

MatroZZZ [7]

Answer:

Part a)

tex]V = -1 \times 10^8 Volts[/tex]

Part b)

$V_{inner} = V_{outer} = -1 \times 10^8 volts$

Part c)

$V = -7.30 \times 10^8 Volts$

Explanation:

Part a)

Net charge distribution on each shell is given as

On surface of radius "a"

$q_a = -3.0 mC$

on radius "b"

$q_b = 3 mC$

on radius "c"

$q_c = -1.0 mC$

Now potential at the outer shell is

$V = \frac{kq_c}{r_c}$

$V = \frac{(9\times 10^9)((-1\times 10^{-3})}{0.09}$

$V = -1 \times 10^8 Volts$

Part b)

Since copper sphere is a conducting sphere so here it will be an equi potential surface

So the potential will remain same throughout the surface of this sphere

Now we can say

$V_{inner} = V_{outer} = -1 \times 10^8 volts$

Part c)

Now electric potential at inner sphere is given as

$V = \frac{kq_a}{r_a} + \frac{kq_b}{r_b} + \frac{kq_c}{r_c}$

$V = \frac{(9\times 10^9)(-3 mC)}{0.025} + \frac{(9\times 10^9)(3 mC)}{0.06} + \frac{(9\times 10^9)(-1 mC)}{0.09}$

$V = -7.30 \times 10^8 Volts$

3 0

3 years ago

A student drops an egg from the roof of their house onto a trampoline. The egg feels a change in momentum of 2.2 kg^ * m/s in 1.

geniusboy [140]

Answer:

F = m a = m v / t where v is the change in velocity in time t

F = p / t since m v is equal to p

F = 2.2 (kg m / s) / 1.1 s = 2 kg-m / s^2 = 2 N

Or you can use the impulse equation

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2 years ago

Một nguồn O phát sóng cơ dao động theo phương trình u = 4cos(4pi t - pi/4). Tốc độ truyền sóng là 1m/s.

brilliants [131]

Answer:

ytrxrddyoxswsdyxgxghfx

jdjdu3jthh

hhhujusbrnog

hhjfjtinrny

ykrjrhrnirjtjjtt

tkrjthr74uu3jt

hri4urjjrjtjjtjtjy

Explanation:

uueuhhhwuejroskanficndui39wn

jebfufkr

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3 years ago

Obviously, we can make rockets to go very fast, but what is a reasonable top speed? assume that a rocket is fired from rest at a

steposvetlana [31]

I’ve answered this problem before and there were 2 parts in this problem.

The solution would be like this for this specific problem:

A. Vf = Vi + Vex*ln(Mi / Mf) 
0.002 * 3e8m/s = 0 + 2000m/s * ln(Mi / Mf) 
300 = ln(Mi / Mf) 
1.9e130 = Mi / Mf

B. 4000m/s = 2000m/s * ln(Mi / Mf) 
2 = ln(Mi / Mf) 
7.389 = Mi / Mf 
Mf = Mi / 7.389 = 0.135*Mi

3 0

3 years ago

Balanced- Forces acting on an object are balanced if the ....

choli [55]

Answer:

there is an equal and opposite force
moving

Explanation:

When balanced forces act on an object at rest, the object will not move. If you push against a wall, the wall pushes back with an equal but opposite force. Neither you nor the wall will move. Forces that cause a change in the motion of an object are unbalanced forces.

7 0

4 years ago