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Sav [38]
3 years ago
11

A window washer stands on a scaffolding 30m above the ground. If he did 23,520J of work to reach the scaffolding, what is his ma

ss?
Physics
1 answer:
kolezko [41]3 years ago
7 0
W.d = mgh

23520 = m × 9.81 × 30
23520 ÷ (9.81 × 30 ) = m
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An increase in temperature the kinetic energy and average speed of the gas particles. As a result, the pressure on the walls of
Cerrena [4.2K]

Answer:

a

The pressure will increase

b

T_2 =  576^oC

Explanation:

From the ideal gas law we have that

     PV  =  nRT

We see that the temperature varies directly with the pressure so if there is an increase in temperature that pressure will increase

   The initial  temperature is T_i  =  10^oC = 10 + 273 =  283 \  K

The objective of this solution is to obtain the temperature of the gas where the pressure is tripled

Now from the above equation given that nR and V  are constant  we have that

    \frac{P}{T}  =  constant

=>  \frac{P_1}{T_1}  =\frac{P_2}{T_2}

Let assume the initial  pressure is P_1 =  1 Pa

So tripling it will result  to the pressure being P_2 =  3 Pa

So

     \frac{1}{283}  =\frac{3}{T_2}  

=>   T_2  =  3 *  283

=>    T_2  =  3 *  283

=>    T_2  = 849 \ K

Converting back to ^oC

   T_2  =  849 -  273

=>  T_2 =  576^oC

8 0
3 years ago
What dictates the minimum and maximum pressure allowed for plumbing fixtures?
DENIUS [597]
The answer is: the building codes, which are a set of rules that regulate the conditions that a building must meet. Those requirements are very important to guarantee safety of both the people who are building it and the people who are going to work or live inside of the building in the future
8 0
3 years ago
Read 2 more answers
What is the charge of an atom with 21 protons and 6 electrons
Svetach [21]

Answer:

Scandium with an ion charge of +3

Explanation:

4 0
3 years ago
Read 2 more answers
An airplane touches down on the runway with a speed of 70 m/s2. Determine the airplane after each second of its deceleration.
ivann1987 [24]
<span>vf^2 = vi^2 + 2*a*d
---
vf = velocity final
vi = velocity initial
a = acceleration
d = distance
---
since the airplane is decelerating to zero, vf = 0
---
0 = 55*55 + 2*(-2.5)*d
d = (-55*55)/(2*(-2.5))
d = 605 meters


</span>
5 0
3 years ago
Explain how energy balance sets planetary temperature? Imagine a planet colder than expected for energy balance and explain why
RUDIKE [14]

The planetary temperature energy balance is obtained by radiating back the absorbed radiation energy from outer-space, by the planet and thus acquiring thermal equilibrium.

What is the process of attaining thermal equilibrium by Earth?

The Stefan-Boltzmann law states that the more the temperature a planet has, the more it will radiate out to reach thermal equilibrium.

We know that outer space contains large masses of radiative energy freely distributed in its vast expanse. A small fraction of this energy is absorbed by the Earth through the atmosphere, surface land, clouds etc.

Now, radiative balance is achieved when a planet's surface continuously warms up until it reaches its peak at which point the same amount of absorbed energy can then be radiated back to space. The relative amount of energy radiated back by a planet is dependent upon the size of the planet.

A colder planet relatively absorbs lower amount of radiation energy from space. In some time, as the planet heats up enough, the energy is radiated back to the space attaining thermal equilibrium.

Learn more about Stefan-Boltzmann law here:

<u>brainly.com/question/14919749</u>

#SPJ4

6 0
1 year ago
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