The outer surface of the glass expands faster than the inside surface since glass is a fairly good thermal insulator. The outer surface tries to expand without the inner surface doing so at the same time. This is the secret of Pyrex glass. It is more conductive to heat and the inner and outer surface expand (and contract) at the same time.

4 0

3 years ago

A 0.5kg pair of shoes weigh 0.3N on Pluto, what is the pull of gravity there?

lara [203]

Answer:

g= 0.6 m/s2

Explanation:

F = Mg

0.3 = 0.5g

g= 0.3/0.5

7 0

3 years ago

A square coil, enclosing an area with sides 3.2 cm long, is wrapped with 2,720 turns of wire. A uniform magnetic field perpendic

marishachu [46]

Answer

$\epsilon = -0.74\ V$

Explanation:

given,

Side of square coil = 3.2 cm

Number of turns = 2720

magnetic field in the coil increases to = 0.45 T

time interval = 1.7 s

average induced voltage in the coil = ?

length = 0.032 m

Area = 0.032² = 0.001024 m²

induced voltage

$\epsilon = -NA \dfrac{dB}{dt}$

$\epsilon = -2720 \times 0.001024 \times \dfrac{0.45}{1.7}$

$\epsilon = -0.74\ V$

The average voltage induced in the coil is equal to $\epsilon = -0.74\ V$

3 0

3 years ago