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Mariulka [41]
3 years ago
13

A temperature of 20°C is equivalent to approximately?

Physics
2 answers:
umka21 [38]3 years ago
7 0

The answer is A.68 degrees

Step2247 [10]3 years ago
4 0

i think its (a) too.

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think of north korea the people are controlled by the leader

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What role does induction play when lightning strikes earth?
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The role lightning plays in earth is when the earth is charged with positive protons, the lightning is the electron.
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Charlotte throws a paper airplane into the air, and it lands on the ground. Which best explains why this is an example of projec
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Explanation:

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3 years ago
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51. Suppose you measure the terminal voltage of a 3.200-V lithium cell having an internal resistance of 5.00Ω by placing a 1.00-
Tanya [424]

Explanation:

Given that,

Terminal voltage = 3.200 V

Internal resistance r= 5.00\ \Omega

(a). We need to calculate the current

Using rule of loop

E-IR-Ir=0

I=\dfrac{E}{R+r}

Where, E = emf

R = resistance

r = internal resistance

Put the value into the formula

I=\dfrac{3.200}{1.00\times10^{3}+5.00}

I=3.184\times10^{-3}\ A

(b). We need to calculate the terminal voltage

Using formula of terminal voltage

V=E-Ir

Where, V = terminal voltage

I = current

r = internal resistance

Put the value into the formula

V=3.200-3.184\times10^{-3}\times5.00

V=3.18\ V

(c). We need to calculate the ratio of the terminal voltage of voltmeter equal to emf

\dfrac{Terminal\ voltage}{emf}=\dfrac{3.18}{3.200 }

\dfrac{Terminal\ voltage}{emf}= \dfrac{159}{160}

Hence, This is the required solution.

5 0
3 years ago
a child drops a ball from a window. The ball strikes the ground in 3.0seconds. What is the velocity if the ball the instant befo
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If you wanted the exact answer, you would need the distance from the window to the ground; and than divide by 3.0. Otherwise, 9.8 meters a second would be your best bet.

6 0
3 years ago
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