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2 years ago

You can tell when you are in an earthquake s shadow zone. a. True b. False

Physics

2 answers:

Verdich [7]2 years ago

5 0

your answer would be A. true

Sonbull [250]2 years ago

4 0

The correct answer is False

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When a 100-Ω resistor is connected across the terminals of a battery of emf ε and internal resistance r, the battery delivers 0.

gladu [14]

Answer:

The emf and internal resistance of the battery are 9 volt and 2.04 Ω

Explanation:

Given that,

First resistor $R = 100\ \Omega$

Power $P = 0.794\ W$

Second resistor $R=200\ \Omega$

Power $P=0.401\ W$

We need to calculate the emf and internal resistance

Using formula of emf

$P=\dfrac{e^2}{R+r}$

For first resistor

$0.794=\dfrac{e^2}{100+r}$ ....(I)

For second resistor

$0.401=\dfrac{e^2}{200+r}$ .....(II)

From equation (I) and (II)

$\dfrac{795}{401}=\dfrac{200+r}{100+r}$

Using component of dividend rule

$\dfrac{393}{401}=\dfrac{100}{100+r}$

$r =2.04\ \Omega$

Now, Put the value of internal resistance in equation (I)

$0.794=\dfrac{e^2}{100+2.04}$

$e^2=0.794(100+2.04)$

$e=\sqrt{0.794(100+2.04)}$

$e=9\ volt$

Hence, The emf and internal resistance of the battery are 9 volt and 2.04 Ω

5 0

3 years ago

What is a black hole's escape velocity?

Igoryamba

<h2><u>ANSWER</u></h2>

The simplest definition of a black hole is an object that is so dense that not even light can escape its surface. If we squished the Earth's mass into a sphere with a radius of 9 mm, the escape velocity would be the speed of light. Just a wee-bit smaller, and the escape velocity is greater than the speed of light.

HopeItHelps!

8 0

2 years ago

Where is the potential energy of a swing the greatest?

Fofino [41]

A. At the top. At this point, the child is highest, and they are not moving. Their potential energy is much greater.

8 0

3 years ago

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What are some common positive and negative attitudes toward physical activities? What

ra1l [238]

the common attributes are positive and negatively charged