1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
otez555 [7]
3 years ago
5

Students are given some resistors with various resistances a battery with internal resistance

Physics
2 answers:
Hunter-Best [27]3 years ago
5 0
One of the primary reasons why a battery should have an internal resistance is that because it is connected to an electromotive source. This electromotive force that is caused by a potential difference would be used for driving the current to power the electrical loads the battery sustains.
balu736 [363]3 years ago
5 0

Answer:

Explanation

Explanation:

V  = emf − Ir ,

where r is the internal resistance and I is the current flowing at the time of the measurement.

I is positive if current flows away from the positive terminal. The larger the current, the smaller the terminal voltage.

Resistances is series add  the total resistances

while in parallel reduces .

You might be interested in
Three kids are riding on a snow sled traveling horizontally without friction at 19.8 m/s. The masses of Kid A, B, and C are 42.8
Kamila [148]

Answer:

34.6 m/s

Explanation:

From conservation of momentum, the sum of initial and final momentum are equal. Momentum is a product of mass and velocity. Initial mass will be 42.8+31.5+25.9=100.2 kg

Final mass will be 31.5+25.9=57.4 kg

From formula of momentum

M1v1=m2v2

Making v2 the subject of the formula then

V2=\frac {M1v1}{m2}

Substitute 100.2 kg for M1, 19.8 m/s fkr v1 and 57.4 kg for m2 then

V2=\frac {100.2 kg\times 19.8 m/s}{57.4 kg}=34.56376 m/s\approx 34.6 m/s

4 0
3 years ago
For most people, getting 8 to 9 hours of sleep increases concentration, improves physical health, and improves one's mood.
olga2289 [7]
That statement is true
8 0
3 years ago
Read 2 more answers
Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the melting of ice, and expla
BlackZzzverrR [31]
  <span>Melting of ice is an endothermic process, meaning that energy is absorbed. When ice spontaneously melts, ΔH (change in enthalpy) is "positive". ΔS (entropy change) is also positive, because, becoming a liquid, water molecules lose their fixed position in the ice crystal, and become more disorganized. ΔG (free energy of reaction) is negative when a reaction proceeds spontaneously, as it happens in this case. Ice spontaneously melts at temperatures higher than 0°C. However, liquid water also spontaneously freezes at temperatures below 0°C. Therefore the temperature is instrumental in determining which "melting" of ice, or "freezing" of water becomes spontaneous. The whole process is summarized in the Gibbs free energy equation: 
ΔG = ΔH – TΔS</span>
4 0
2 years ago
The Iceberg Kid, infamous for imposing a deep freeze on whoever disagrees with him, discovers that in his advanced teenaged year
Mademuasel [1]

Answer:

7.24 Ω

Explanation:

Power = energy / time = 195 J / 9.81 = 19.88 W

and power = V² / R

R  resistance = 12 V²  / 19.88 W  = 7.24 Ω

8 0
2 years ago
How long can you keep open beer in the fridge?
Gre4nikov [31]
You can keep it for as long as you want; you're the boss of your fridge. 
But anyway, an open beer bottle can stay good in the fridge for up to 96 hours, probably more. 
7 0
2 years ago
Read 2 more answers
Other questions:
  • Can you please explain me how to do integration in physics in a easy way?
    8·1 answer
  • Two vectors have a sum A and their difference is B.If A=B then,the angle between the two vectors is
    13·1 answer
  • How do you best determine whether j/m2 and m*s2/N are equivalent units?
    10·2 answers
  • Light year is a unit of?
    8·1 answer
  • Vilket är det modernaste förvarings materialet?
    8·1 answer
  • A car is traveling at 24.0 m/s when the driver suddenly applies the brakes, causing the car to slow down with constant accelerat
    12·2 answers
  • Do changes that cannot be easily reversed, such a burning, observe the law of conservation of mass? Explain.
    10·2 answers
  • Why do fishermen like fishing during a full moon?
    11·1 answer
  • Answer (soon please)
    8·1 answer
  • Como se representa un intervalo de tiempo
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!