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3 years ago

Difference between load and effort

1 answer:

3 0

Answer. Is that load is a burden; a weight to be carried while effort is the work involved in performing an activity; exertion.

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Describe what happened. When was there more potential energy in the system?

nasty-shy [4]

Answer:

what is the full question

Explanation:

3 0

3 years ago

A wall has inner and outer surface temperatures of 25◦C and 8◦C, respectively. The interior and exterior air temperatures are 35

Angelina_Jolie [31]

Answer:

a) $\frac{\dot Q}{A} =60\ W.m^{-2}$

b) $\frac{\dot Q}{A} =110\ W.m^{-2}$

c) The wall may not be under steady because the two surfaces of the wall are exposed to the air at different temperatures and they have different convective coefficient.

Explanation:

Given:

temperature of the inner surface of the wall, $T_i=25^{\circ}C$

temperature of the outer surface of the wall, $T_o=8^{\circ}C$

temperature of the air outside, $T_{ao}=-3^{\circ}C$

temperature of the air inside, $T_{ai}=35^{\circ}C$

coefficient of heat convection on outside, $h_o=10\ W.m^{-2}.K^{-1}$

coefficient of heat convection on inside, $h_i=6\ W.m^{-2}.K^{-1}$

The heat flux between the interior air and the wall:

The convective heat transfer rate is given as,

$Q=h_i.A.\Delta T$

$\Rightarrow \frac{\dot Q}{A} =h_i\times (T_{ai}-T_i)$

$\frac{\dot Q}{A} =6\times (35-25)$

$\frac{\dot Q}{A} =60\ W.m^{-2}$

The heat flux between the exterior air and the wall:

$\Rightarrow \frac{\dot Q}{A} =h_o\times (T_{ao}-T_i)$

$\frac{\dot Q}{A}=10\times (8-(-3))$

$\frac{\dot Q}{A} =110\ W.m^{-2}$

The wall may not be under steady because the two surfaces of the wall are exposed to the air at different temperatures and they have different convective coefficient.

4 0

4 years ago

Suppose you have a hypothesis you believe to be correct what should you do to make you become a theory

LenKa [72]

D. Collect more evidence and try to convince the other scientist

6 0

4 years ago

If a nichrome wire has a resistance of 15Ω and is connected across the terminals of a 3.0 V flashlight battery, how much current

scoray [572]

Answer:

0.20 A

Explanation:

The current in the wire is given by Ohm's law:

$I=\frac{V}{R}$

where

I is the current

V is the voltage

R is the resistance

In this problem,

V = 3.0 V is the voltage

$R=15 \Omega$ is the resistance

Substituting into the formula,

$I=\frac{3.0 V}{15 \Omega}=0.20 A$

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3 years ago

The potential energy of a pear is 5.0 joules. The pear is 4 m high. What is the mass of the apple?

gregori [183]

Answer:

rrteertewtagtewyewtyewtewy

Explanation:

8 0

4 years ago

Difference between load and effort​

Difference between load and effort