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Marta_Voda [28]

3 years ago

15

Why do you think it is so important that all evidence be identified (such as marking the bullets and tagging firearms)? What con

sequences might result if these procedures were not followed?

1 answer:

igor_vitrenko [27]3 years ago

7 0

You could pet the wrong bullets in the wrong gun

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The battery has a voltage of 12V. R1 = R2 = 100Ω.

Margaret [11]

Answer:

<h3> FOR PARALLEL CONNECTION</h3><h3>I1 = 0.12A</h3><h3>I2 = 0.12A </h3><h3>IT =0.24A</h3><h3>FOR SERIES CONNECTION</h3><h3>I1 = I2 = 0.06A</h3><h3>IT =0.06A</h3><h3 />

Explanation:

According to ohms law, V =ITRt

V is the supply voltage

IT is the total current flowing in the circuit

Rt is the total equivalent resistance

Given R1= R2= 100Ω

V= 12V

FOR PARALLEL CONNECTION;

To calculate the total current IT in the battery, we need to calculate the total equivalent resistance RT first. For a parallel connected circuit, the equivalent resistance in the circuit is the sum of the reciprocal of its individual resistances as shown;

$\frac{1}{RT} = \frac{1}{100} + \frac{1}{100}\\\frac{1}{RT} = \frac{2}{100} \\\frac{RT}{1} = \frac{100}{2}\\$

RT = 50Ω

from the equation above;

IT = V/RT

IT = 12/50

IT = 0.24A

Note that in a parallel connected circuit, different current flows through the resistances but the same voltage is across them.

IT = I1+I2

For current in resistance R1;

I1 = V/R1

I1 = 12/100

I1 = 0.12A

Since both resitance are the same, they will share the total current equally. Therefore I2 = 0.12A

FOR SERIES CONNECTION;

The total equivalent resistance in the circuit will be the sum of their individual resistances.

$RT = R1+ R2$

RT = 100Ω+100Ω

RT = 200Ω

IT = V/RT

IT = 12/200

IT = 0.06A

Since the resistances are connected in series, the same current will flow through them but different voltages. The total current flowing in the circuit will be the same current flowing through the resistors.

Therefore I1 = I2 = 0.06A

4 0

3 years ago

Two cars collide at an icy intersection and stick together afterward. The first car has a mass of 1200 kg and was approaching at

igomit [66]

To resolve point A and B we need the concepts related to conservation of momentum (By collision) and Kinetic Energy. Conservation of momentum is given by the equation,

$m_1\vec{v_1}+m_2\vec{v_2} = (m_1+m_2)\vec{v}$

Our values in the statment are:

$m_1 = 1200kg$

$v_1 = 6m/s$

$m_2 = 900kg$

$v_2 = 24m/s$

Part A) As it is in an icy intersection, there is two different components (x,y) then,

$1200(-6\hat{j})+900(-24\hat{i}) = (1200+900)\vec{v}$

$2100\vec{v} = -21600\hat{i}-7200\hat{j}$

$\vec{v} = -72/7\hat{i}-24/7\hat{j}$

Then the magnitude is,

$|\vec{v}| = 9.6525m/s$

Part B) To obtain the Kinetic Energy Loss we need to use its equation, which is given by,

$KE_i = \frac{1}{2}m_1v_1^2+\frac{1}{2}m_2v_2^2$

$KE_i = \frac{1}{2}(1200)(6)^2+\frac{1}{2}(900)(24)^2$

$KE_i = 280.8kJ$

The final energy is given by,

$KE_f = \frac{1}{2}(m_1+m_2)v_f^2$

$KE_f = \frac{1}{2} (1200+900)(9.65)$

$KE_f =97778.625J$

Then the change in Kinetic Energy is

$\Delta KE = KE_f-KE_i = 97.778kJ- 280.8kJ$

$\Delta KE = -183.02kJ$

<em>There was a loss of KE of 183.02kJ</em>

5 0

3 years ago

5. According to the law of reflection, the

Fantom [35]

Answer:

the answer is ....angle of reflection

5 0

3 years ago

What are the developmental stages according to Erikson?

natita [175]

Answer:

1. Trust vs. Mistrust

2. Autonomy vs. Shame

3. Initiative vs. Guilt

4. Industry vs. Inferiority

8 0

3 years ago

A thermometer is placed in water in order to measure the water’s temperature. What would cause the liquid in the thermometer to

sineoko [7]

The temperature of the water getting colder would cause the liquid in the thermometer to drop due to less heat being transferred from the water to the liquid, so the liquid molecules are closer than when they have high energy.

3 0

3 years ago

Read 2 more answers