Recycled plastics cannot be used to produce new food containers because __

Consider a system of a cliff diver and the earth. the gravitational potential energy of the system decreases by 28,000 j as the

olga2289 [7]

The decrease in gravitational potential energy of the system is given by

$\Delta U = (mg) \Delta h$

where

m is the mass, g is the gravitational acceleration, and $\Delta h$ is the variation of height of the system.

$(mg)$ also corresponds to the weight of the diver, therefore if we rearrange the equation and we use $\Delta U=28000 J$ and $\Delta h=32.0 m$ , we can find her weight:

$mg=\frac{\Delta U}{\Delta h}=\frac{28000 J}{32 m}=875 N$

5 0

4 years ago

Good coding specialists share which of the following characteristics?

Anarel [89]

The correct option is C.
For an individual to become a code specialist, such a person must have advanced computer skills especially in coding processes. The medical field has many sub specialties, therefore a coding specialist must choose to work in a particular area of medicine which interest him most. Such people must also be able to work independently.

5 0

3 years ago

Read 2 more answers

E) Thermal energy is released during

vichka [17]

Answer:

e) True, f) False

Explanation:

e) Let consider a close system, that is, a system with no mass interactions with surroundings. Then, we get the following expression by the First Law of Thermodynamics:

$Q_{net,in} - W_{net, out} = \Delta U$ (1)

Where:

$Q_{net, in}$ - Net input heat, measured in joules.

$W_{net, out}$ - Net output work, measured in joules.

$\Delta U$ - Change in thermal energy, measured in joules.

Please notice that work comprises all kind of work (i.e. mechanical, electric, magnetic), whereas heat comprises all heat interactions including chemical and radioactive phenomena.

If thermal energy is released, then $\Delta U < 0$ , which is caused by three scenarios:

(i) $Q_{net,in} < 0$ , $W_{net, out} < 0$ , $|Q_{net,in}|>|W_{net,out}|$

(ii) $Q_{net, in} > 0$ , $W_{net,out} > 0$ , $|Q_{net,in}|$

(iii) $Q_{net,in}< 0$ , $W_{net, out}>0$

In the case $Q_{net,in} > 0$ , $W_{net, out}$ , the thermal energy of the system is increased. Therefore, thermal energy is released during some energy conversions. Answer: True

f) A liquid solidifies when temperature goes below point of fusion, meaning a realease of heat with no work interactions. That is:

$Q_{net, in} = \Delta U$ , $Q_{net, in} < 0$ (2)

If $Q_{net, in} < 0$ , then $\Delta U < 0$ . Then, if a liquid absorbs heat energy, then thermal energy is increase and the liquid does not solidifies. Answer: False.

7 0

3 years ago

Write the mathemetical relation between work force and displacement

il63 [147K]

Answer:

Work is measured as the product of force and the displacement in the direction of the force. Work = force × displacement in the direction of the force.

8 0

2 years ago

Simple question (Serious answers)

yuradex [85]

Answer: 1

Explanation:

hey i m Lola 16 years old hope this helped you ! :D

7 0

3 years ago

Recycled plastics cannot be used to produce new food containers because ___