3 years ago

I'll mark brainiest if you help me

Physics

1 answer:

Butoxors [25]3 years ago

5 0

Question 4 is true, question 5 is B.

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You are doing chores to earn your allowance. For each chore you do, you earn $3. What is the independent variable?

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The independent variable is b the amount of chores you do

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3 years ago

Please verify these are correct. No work needs to be shown unless I've made a mistake. Thank you.

nevsk [136]

Answer:

Those are correct, well done.

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A man starts his car from rest and accelerates at 1 m/s2 for 2 s. He then continues at a constant velocity for 10 s until

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Answer: I showed you all calculation . You did not attach any graph to question .

Explanation:

Lets first find Velocity

Vr=o m/s

Ve=?

a=1m/s²

t=2s

----------

a=(Vr-V)/t

1m/s²=Vr-0m/s/2s

2m/s=Vr

Lets find the time neeeded to stop :

a=1m/s²

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Vf=0m/s

a=(Vf-Vs)/t

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3 years ago

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A real power supply can be modeled as an ideal EMF of 60 Volts in series with an internal resistance. The voltage across the ter

lara31 [8.8K]

Answer:

5 ohms

Explanation:

Given:

EMF of the ideal battery (E) = 60 V

Voltage across the terminals of the battery (V) = 40 V

Current across the terminals (I) = 4 A

Let the internal resistance be 'r'.

Now, we know that, the voltage drop in the battery is given as:

$V_d=Ir$

Therefore, the voltage across the terminals of the battery is given as:

$V= E-V_d\\\\V=E-Ir$

Now, rewriting in terms of 'r', we get:

$Ir=E-V\\\\r=\frac{E-V}{I}$

Plug in the given values and solve for 'r'. This gives,

$r=\frac{60-40}{4}\\\\r=\frac{20}{4}\\\\r=5\ ohms$

Therefore, the internal resistance of the battery is 5 ohms.

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4 years ago

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A is probably the answer you want

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