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3 years ago

How do geologist determine the age of a fault line? What types of evidence is specifically used?

1 answer:

6 0

To determine the relative age of different rocks, geologists start with the assumption that unless something has happened, in a sequence of sedimentary rock layers, the newer rock layers will be on top of older ones. This is called the Rule of Superposition. ... With absolute age dating, you get a real age in actual

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A series RC circuit contains two resistors and two capacitors. The resistors are 39 ohms and 56 ohms. The capacitors have capaci

Nataly [62]

Answer:

The correct option is b

Explanation:

From the question we are told that

The resistance of the first resistor is $R_1 = 39 \ \Omega$

The resistance of the second resistor is $R_2 = 56 \ \Omega$

The capacitive reactance of the first capacitor is $jX_{c_1 } = 80 \ \Omega$

The capacitive reactance of the first capacitor is $jX_{c_2 } = 40 \ \Omega$

Generally given that the resistors are connected in parallel , their equivalent resistance is

$R_e = R_1 +R_2$

=> $R_e = 39 + 56$

=> $R_e = 95 \ \Omega$

Generally given that the capacitors are connected in parallel , their equivalent capacitive reactance is

$jX_e = jX_{c_1} + jX_{c_2}$

=> $jX_e = 80 + 40$

=> $jX_e = 120$

Hence the impedance of the circuit is

$Z = R_e - jX_e$

=> $Z = 95 - j120$

Generally from the impedance equation , the total used resistance is

$R_e = 95 \ \Omega$

3 0

3 years ago

Makala arrives late to class and misses the first few minutes of the lecture. These are the notes she takes:

lukranit [14]

Answer:

B. Quantum Mechanics

Explanation:

Quantum mechanics is the foundation of all quantum physics including quantum chemistry, quantum field theory, and quantum information science.

4 0

3 years ago

Read 2 more answers

If a powerlifter raises a 1000 N weight a distance of 2.0 meters in 0.5 seconds, what is his power output?

Ilya [14]

Power =Force * Velocity

Velocity = Distance/Time = 2/0.5 = 4 m/s

Therefore,

P = 1000*4 = 4000 W = 4 kW

3 0

3 years ago

Read 2 more answers

Cleo stated that light travels through air in straight paths, and when it moves from air to water, light changes direction, spee

hodyreva [135]

Answer:

light bends away from the normal when it moves from air into water-refraction

4 0

3 years ago

A 2 kg object being pulled across the floor with a speed of 10 m/sec is suddenly

zvonat [6]

Answer:

The frictional force producing this deceleration would have a magnitude of $4\; \rm N$ .

Explanation:

The velocity of this object changed by $\Delta v = (-10\; \rm m\cdot s^{-1})$ in $\Delta t = 5\; \rm s$ . The acceleration of this object would be:

$\begin{aligned}a &= \frac{\Delta v}{\Delta t} \\ &= \frac{-10\; \rm m\cdot s^{-1}}{5\; \rm s} = -2\; \rm m\cdot s^{-2}\end{aligned}$ .

Let $m$ denote the mass of this object. By Newton's Second Law of Motion, the net force on this object would be:

$\begin{aligned}F &= m \, a \\ &= 2\; \rm kg \times (-2\; \rm m\cdot s^{-2}) \\ &= -4\; \rm N\end{aligned}$ .

( $1\; {\rm kg \cdot m \cdot s^{-2} = 1\; {\rm N}$ .)

If the floor is level, friction would be the only unbalanced force on this object. Thus, the magnitude of the frictional force on this object would also be $4\; {\rm N}$ , same as the magnitude of the net force on this object.

5 0

3 years ago