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pychu [463]
3 years ago
13

Tom says that insulation keeps out the cold. Explain why this statement is incorrect. What should Tom have said?

Physics
2 answers:
ludmilkaskok [199]3 years ago
7 0
It does in the winter and keeps the heat in. During the summer it keeps in the cold air and keeps out the heat.
Zina [86]3 years ago
4 0
There is no such thing as"cold", in the same way that there is no such thing
as "darkness" or "quietness".  "Darkness" is the absence of light, "quietness"
is the absence of sound, and "cold" is the absence of heat.

Tom should have said that insulation <em>keeps the heat in</em> .
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The acceleration of automobiles is often given in terms of the time it takes to go from 0 mi/h to 60 mi/h. One of the fastest st
Rudiy27

Answer:

9.934 m/s²

Explanation:

Given:

Initial speed of the Bugatti Veyron Super Sport = 0 mi/h

Final speed of the Bugatti Veyron Super Sport = 60 mi/h

Now,

1 mi/h = 0.44704 m / s

thus,

60 mi/h = 0.44704 × 60 = 26.8224 m/s

Time = 2.70 m/s

Now,

The acceleration (a) is given as:

a=\frac{\textup{Change in speed}}{\textup{Time}}

thus,

a=\frac{26.8224 - 0 }{2.70}

or

a = 9.934 m/s²

6 0
3 years ago
(a) a light-rail commuter train accelerates at a rate of 1.15 m/s2. how long does it take it to reach its top speed of 80.0 km/h
snow_lady [41]
A = 1.15m/s2, Vf = 80.0km/h --> we need it in m/s, so:
Vf = 80km/h × 1000m/1km × 1h/3600s
= 22.22m/s
Top speed = Vf, initial speed = Vi
time (t) = V(Vf-Vi) ÷ a
t = (22.22-0)m/s ÷ 1.15m/s2
t = 22.22m/s × s2/1.15m
= 19.32 seconds
6 0
4 years ago
The East African rift is an example of what
Alja [10]
The East African rift is an example of a divergent tectonic plate boundary that is developing. Though it is still currently a narrow zone, it is currently experiencing the process of splitting into two different tectonic plates. Over time, the supposed narrow zone can split into a larger one.
5 0
3 years ago
The largest single publication in the world is the 1112-volume set of British Parliamentary Papers for 1968 through 1972. The co
Marat540 [252]

Answer:

m_l=550\ kg is the mass of librarian.

Explanation:

Given:

  • mass of the system, m_s=3.3\times 10^{3}\ kg
  • velocity of librarian relative to the ground, v_l=2.5\ m.s^{-1}
  • velocity of the cart relative to the ground, v_c=0.5\ m.s^{-1}

N<u>ow using the principle of elastic collision:</u>

Net momentum of the system is zero.

m_l\times v_l=(3300-m_l)\times v_c

m_l\times 2.5=(3300-m_l)\times 0.5

m_l=550\ kg is the mass of librarian.

6 0
3 years ago
Read 2 more answers
Please help with this one
olasank [31]

Answer:

OPTION A is the correct answer

6 0
3 years ago
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