All categories

3 years ago

How was the theory of plate tectonics developed?

1 answer:

6 0

Answer: A conflict between established theory, and empirical evidence, resulting in compromise.

Explanation;

Plate tectonic theory had its beginnings in 1915 when Alfred Wegener proposed his theory of "continental drift." Wegener proposed that the continents plowed through crust of ocean basins, which would explain why the outlines of many coastlines look like they fit together like a puzzle.

You might be interested in

A compound consisting of Cr3+ ions and OH ions would be named chromium (III) hydroxide

Vedmedyk [2.9K]

The answer to ya question is true

3 0

3 years ago

Read 2 more answers

A block with a mass of 1kg moving at a velocity of 3m/s collides and sticks to a block of mass of 4kg initially at rest. What is

Vsevolod [243]

Answer:using Newton third law

Let initial velocity of block be u1=3m/s

Mass of moving block m1 =1kg

Final velocity of block =V

Mass of stationary block m2= 4kg

Since they stick together, their final velocity will be the same.

m1u1 + m2u2=(m1+m2)v

(1*3)+(0*4)=(1+4)v

3=5v

Divide both sides by 5

V=0.6

Final velocity is 0.6m/s

Explanation:

8 0

3 years ago

What current is required in the windings of a long solenoid that has 420 turns uniformly distributed over a length of 0.575 m in

WARRIOR [948]

Answer:

The current in the solenoid=0.463 Ampere

Explanation:

Given:

Number of turns , N=420

Length of the solenoid=0.575 m

Magnitude of Magnetic Field, $B=4.22\times10^{-5}\ \rm T$

We know that the magnitude of the magnetic Field inside the solenoid is

$B=\mu_0 ni$

Where

$\mu_0$ is the permeability of free space.
n is the number of turns per unit length
i is the current

According to question

$B=\mu_0 ni\\\\4.22\times10^{-5}=1.24664\times10^{-7}\times \dfrac{420}{0.575}\times i\\=0.463\ \rm Amp$

Hence the current is calculated.

4 0

3 years ago

Police radar guns measure the speed of moving vehicles by transmitting electromagnetic waves at a vehicle and detecting a Dopple

Naddika [18.5K]

Answer:

Frequency shift, f = 5270.66

Explanation:

It is given that,

Velocity of the car, v = 66 mph = 29.50 m/s

Frequency transmitted by a police radar, $F_s=26.8\ GHz=26.8\times 10^9\ Hz$

Frequency shift is given by :

$f=\dfrac{2vF_s}{c}$

$f=\dfrac{2\times 29.50\ m/s\times 26.8\times 10^9\ Hz}{3\times 10^8\ m/s}$

f = 5270.66 Hz

So, the frequency shift is 5270.66 hertz. Hence, this is the required solution.

4 0

3 years ago

help plz! what vibrates in following types of wave motion 1)light wave 2)sound waves 3)x-rays 4)water waves

Alecsey [184]

Answer:

I believe it's 2) sound waves

Explanation:

With sound waves, the energy travels along in the same direction as the particles vibrate. This type of wave is known as a longitudinal wave, so named because the energy travels along the direction of vibration of the particles.

7 0

2 years ago