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Arlecino [84]
3 years ago
8

A cell has an emf of 1.5 V and an internal resistance of 0.65 Q.

Physics
1 answer:
weeeeeb [17]3 years ago
5 0

Answer:

14000 J / 0.40 J/s = 35 000 s or about 9.75 hrs

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What is the input of energy for a device that provides 50 units of useful energy and has an efficiency of 0.55?
marshall27 [118]

If that's the case, then 

                          50 units = 0.55 x the input energy

Divide each side by  0.55 :       

                   50 units/0.55  =  the input energy =

                              <em> 90 and 10/11 units</em>


3 0
4 years ago
Suppose an oxygen molecule traveling at this speed bounces back and forth between opposite sides of a cubical vessel 0.17 m on a
Nastasia [14]

Answer: The last part of the question has some details missing which is ; (Assume that the molecule's velocity is perpendicular to the two sides that it strikes.) molecule v=482 m/s molecule momentum=2.56 x 10^(-23)

Explanation:

  • The momentum of the molecule is 2.56 x 10^(-23) .
  • Particle hits the wall and bounces.
  • Momentum is reversed. Change in momentum = impulse
  • This is Force x time.
  • Momentum change happens at a wall after each trip.

  • time required = distance /speed

  • = 0.17 X 2/(482 m/s)

  • Average force = impulse / time

  • = 2 x 482 x 2.56 x 10^(-23) / (0.17 x 2)

  • = 7.76 x 10^20N, is the average force the molecule exerts on one of the walls of the container.
3 0
3 years ago
Question 8 of 10
ad-work [718]

Answer:

B. Manipulated Variable

3 0
3 years ago
Read 2 more answers
Identify the generic outer electron configuration for the halogens.
Delicious77 [7]
<span>The Halogen outer layer is considered to be full with eight electrons. Halogen is also considered to be part of the Noble gases classification. The exchange of electrons in the halogen atom renders a photon energy pulse with produces light. The consentrated light spectrum is produced in the halogen light bulbs and halogen laser products.</span>
8 0
4 years ago
You are travelling by skateboard at 3.0 m/s and start to accelerate. If you
vovangra [49]

Answer: 8m/s

Explanation:

Vs= 3 m/s

Vf=?

a=0.5m/s²

t=10s

-----------

a=Vf-Vs/t

at=Vf-Vs

0.5*10s=Vf-Vs

5m/s=Vf-3m/s

5m/s+3m/s=Vf

Vf=8m/s

6 0
3 years ago
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