PLEASE HELP ASAP!! Which of the following diagrams represents a complete series circuit?

Three different objects, all with different masses, are initially at rest at the bottom of a set of steps. Each step is of unifo

fgiga [73]

The definition of gravitational potential energy would gravitate allows to find the answers for the energy of each object on the highest rung of the ladder are:

a) expression for gravitational potential energy is $U_p = m g \ \Delta y$

b) Energy value

* Body 1 U_p = 82 J

* Body 2 U_p = 38.6 J

* Body 3 18.5 J

The gravitational potential energy is a configuration energy that represents the amount of work that the system can do for a given configuration, its expression is

$U_p = m g \ \Delta y$

Where $U_p$ is the gravitational potential energy, m the mass of the body and Δy the difference in height.

In this case it indicates that the minimum height is at the bottom and is equal to zero, the steps of a ladder have a height of approximately y = 15 cm = 0.15 m

They indicate the mass of the bodies are m₁ = 3.10 kg, the mass of the body 2 m₂ = 1.46 kg , the mass of the third object is not observed, suppose it is m₃ = 0.7 kg.

They indicate that the body is placed on the last step, suppose it is a standard 18-step ladder, therefore the total height is

y = # _ steps y_each step

y = 18 0.15

y = 2.70 m

the gravitational potential energy to the capacity of the body is

body 1

$U_p$ = m₁ g Δy₁

U_p = 3.10 9.8 (2.70 -0)

U_p = 82 J

body 2

U_p = 1.46 9.8 ( 2.7-0)

U_p = 38.6 J

body 3

U_pUp = 0.70 9.8 (2.7-0)

U_p = 18.5 J

In conclusion, using the definition of gravitational potential energy, we can find the answers for the energy of each object on the highest rung of the ladder are;

a) expression for gravitational potential energy is $U_p = m g \ \Delta y$

b) Energy value

* Body 1 U_p = 82.0 J

* Body 2 U_p = 38.6 J

* Body 3 U_p = 18.5 J

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8 0

3 years ago

The thermal efficiency of a power cycle operating in a reversible manner is found to be 50%. Assuming that the same 2 thermal re

inna [77]

Answer:

Explanation:

The thermal efficiency of a Power cycle $\eta = \dfrac{Q_H -Q_c}{Q_H}$

where;

$\eta = 50\% = 0.5$

$Q_H = Heat \ flow \ from \ higher \ temperature$

$Q_c = Heat \ flow \ from \ lower \ temperature$

$0.5 = \dfrac{Q_H -Q_c}{Q_H}$

$0.5 Q_H = Q_H - Q_c$ --- (1)

$Q_c = 0.5 Q_H$ ---- (2)

The coefficient of performance is:

$COP_R = \dfrac{Q_c}{Q_H -Q_c}$

let replace the value of $Q_c = 0.5 Q_H$ in the above equation then;

$COP_R = \dfrac{0.5Q_H}{Q_H -0.5 Q_H}$

$COP_R = \dfrac{0.5Q_H}{0.5 Q_H}$

$COP_R = 1$

The

On the other hand, the heat pump

$COP_{HP} = \dfrac{Q_H}{Q_H -Q_c}$

By replacing equation (1) into the above equation; we have:

$COP_{HP} = \dfrac{Q_H}{0.5Q_{H}}$

$COP_{HP} = \dfrac{1}{0.5}$

$COP_{HP} =2$

t

5 0

3 years ago

What part of an atom can change during a nuclear reaction but cannot change during a chemical reaction

Dmitry [639]

the number of protons and neutrons. hope this helps (:

4 0

4 years ago

Read 2 more answers

Given theta = 7pi/6, find (sec theta, cos theta) ...?

uysha [10]

There is an identity of sin(2pi-x) = -sin(x) and cos(2pi-x) = cos(x). This is what we are going to use.

(7pi/6) = (2pi)-(pi/6)


Therefore:

1) sec(7pi/6) = 1/cos(2pi-(pi/6)) = 1/cos(pi/6) = 2sqrt(3)/3

2) cos(7pi/6) = cos(pi/6) = sqrt(3)/2

I hope my answer has come to your help. Thank you for posting your question here in Brainly. We hope to answer more of your questions and inquiries soon. Have a nice day ahead!

5 0

3 years ago

Pls pls help i am in 8th grade k12 How is the temperature affected (increased or decreased) when the iron block is placed in the

PtichkaEL [24]

Explanation:

the water temperature increase or decrease

6 0

3 years ago