Explain why a battery causes charge to flow spontaneously when the battery is inserted in a circuit

Answers

Answer 1

Answer: Batteries supply electrons to the circuit by releasing negatively charged atoms or ions. These ions are produced by the batteries through a chemical reaction that spontaneously occurs within the battery. So the negative end of the battery pushes the ions towards the positive end of the circuit with the help of the voltage. This is why eventually, batteries "run out" when the electrode is used up and the chemical reaction can no longer continue.

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1. Calculate the resistance of a 12v, 20-amp circuit.

Answers

Answer:

R = 0.6 ohms

Explanation:

We have,

Voltage of the circuit is 12 V

Current flowing in the circuit is 20 A

It is required to find the resistance of the circuit. Ohm'slaw gives the relationship between voltage, current and resistance. It is given by :

$V=IR$

R = resistance

$R=(V)/(I)\n\nR=(12)/(20)\n\nR=0.6\ \Omega$

so, the resistance of the circuit is 0.6 ohms.

What force causes a moving object to move in a curved or circular path?

Answers

THE UNBALANCED FORCE THAT CAUSES OBJECTS TO MOVE IN A CIRCULAR PATH IS CALLED A CENTRIPETAL FORCE. GRAVITY PROVIDES THE CENTRIPETAL FORCE THAT KEEPS OBJECTS IN ORBIT. THE WORD CENTRIPETAL MEANS "TOWARD THE CENTER

The current in the circuit shown is 2.0 A.What is the value of R3?

A) 10 Ω
B) 15 Ω
C) 20 Ω
D) 55 Ω

Answers

Answer:

Resistor R₃ = 10 Ω

Explanation:

It is given that,

Current flowing in the circuit, I = 2 A

Resistors R₁ = 2 Ω

Resistor R₂ = 3 Ω

Voltage, V = 30 V

We have to find the value of R₃. All three resistors are connected in series. In series combination, the current flowing through the all resistors is same. Firstly, calculating equivalent resistance of three resistors as :

$R_(eq)=R_1+R_2+R_3$

$R_(eq)=2\ \Omega+3\ \Omega+R_3$

$R_(eq)=5\ \Omega+R_3$ ..............(1)

Using Ohm's law : $V=IR_(eq)$

$30\ V=2\ A* (5 + R_(3))$

On solving above equation : $R_3=10\ \Omega$

Hence, the correct option is (A) " 10 Ω "

The value of R3 is A) 10 Ω

At its closest point, Mercury is approximately 46 million kilometers from the sun. What is this distance in AU?

Answers

This problem can be solved using the following relation: 1 kilometer = 6.6846e-9 AU. Since we are already given the number of kilometers, we simply have to multiply it to its equivalent in AU to solve for the equivalent distance. This is done below:

46 000 000 * 6.6846e-9 = 0.3 AU

Using information about natural laws, explain why some car crashes produce minor injuries and others produce catastrophic injuries.

Answers

The larger the mass and the speed, the larger the force it would produce if it crashes something. Some car crashes produce minor injuries because maybe this car is small and runs at very slow speed which would mean less force when in impact with another. However, if a big truck crashes, it is expected to produce a larger force causing catastrophic injuries.

The car crash in which the car is moving at higher speed will cause catastrophic injuries whereas the car moving at smaller speed will cause minor injuries. This is due to the law of inertia of the bodies.

Explanation:

The inertia of a body is defined as the resistance of the body towards any change in its current state of rest or motion. The body does not want to change its state and this resistance of the body is directly proportional to the mass of the body.

According to the law of inertia, a body continues to be in its state of rest or motion until and unless an external force acts on the body.

A car moving at a higher speed and having a higher mass is considered to have higher inertia of motion and therefore when it crashes, it experiences a very high stopping force and due to this, the injuries caused in the car crash will be very catastrophic.

Whereas, if the same car is moving at a lower speed, the inertia of motion of the car will be less and when this car crashes, it will experience a smaller force and comes to rest. Due to this, the injuries caused in the crash will be minor.

Thus, The car crash in which the car is moving at higher speed will cause catastrophic injuries whereas the car moving at smaller speed will cause minor injuries. This is due to the law of inertia of the bodies.

Learn More:

1. Which one remains constant in uniform circular motion brainly.com/question/2562955

2. The unit of the gravitational constant brainly.com/question/1724648

3. The x-component of the given vector brainly.com/question/2562517

Answer Details:

Grade: High School

Subject: Physics

Chapter: Laws of motion

Keywords:

natural laws, law of inertia, mass, speed, car crash, minor injuries, catastrophic, bodies, rest or motion, state, inertia of motion.

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Answers

Answer:

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