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3 years ago

Use complete sentences to explain the relationship between the Earth's crust and the Earth's ocean sizes.

1 answer:

3 0

The relationship between the earths crust and the ocean sizes is <span>So much of the Earth is hidden from view. You see some of the rocky crust, but that’s only 1 percent of the Earth’s mass. Beneath the crust is the dense, semisolid mantle, which accounts for 84 percent. The rest of the planet’s mass is the core, with a solid center and a liquid outer layer. The crust and the very top of the mantle make up the lithosphere. This solid portion of the Earth has been identified because it continually moves in slow motion.</span>

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Consider a traveling wave described by the formula

Harrizon [31]

Answer:

The wave is traveling in the +x direction.

Explanation:

The equation of a wave is given by the formula as :

$y(x,t)=A\ sin(kx-\omega t)$

Here,

A is the amplitude of wave

$(kx-\omega t)$ is the phase of wave

$\omega$ is the angular frequency of the wave

We need to find the correct statement out of given options. The given equation can be rewritten as :

$y(x,t)=A\ sin(\omega t-kx)$

Here, the propagation constant is negative. So, the wave is moving in +x direction. Hence, the correct option is (a).

4 0

4 years ago

Using F=ma, explain why a train is more difficult to start moving and more difficult to bring to a stop than an average sized ca

seropon [69]

Answer:

M_Train>> m_car a_train <a_car

Explanation:

To start the movement of the train or the car, the motorcycle applies a force on the wheels, which starts the acceleration in the case of the train, it has a much greater mass than that of the car, for which to obtain the same acceleration necessary a much greater force

a = F / m

as the mass of the train is greater than that of the car.

a_train <a_car

Something similar happens when the vehicles stop, the engine stops applying force forward and the brakes apply a force backward that creates a negative acceleration that slows down, again as the mass of the train is much greater than the of the car its negative acceleration is much less.

It is good to clarify that to compensate for this the trains have a braking system on all wheels

6 0

3 years ago

What is the function of eye lens of the human eye<br>

Artyom0805 [142]

Answer:

Lens of the human Eye is a important and one of that most complex sense organ.

Explanation:

Lens of the human eye it helps that in visualizing light and color perception and objects , glance on the human eye structure and function.

Sense organs are much pretty similar to the camera they help us see the objects clear.

A human eye is the 2.3 cm in diameter and all filled some fluid, and there are following parts in eye:- cornea, Retina , Lens ,Pupil , optic nerves.

cornea :- the cornea is the first transparent part of is called cornea, enters the light through the cornea.

Retina :-it is light sensitive layer that consists of nerve cells,then transmitted to the brain through nerves.

Lens:- behind the pupil there is a transparent structure called lens,it shape focus light on the retina.

Pupil:-it control the value of light that enters the human eye.

Optic nerves is are the two types :- (1) cones (2) Rods .

7 0

3 years ago

A high efficiency shower can save... 1. water 2. energy 3. both ?

pantera1 [17]

Answer:

both

Explanation:

You'll use less water....less hot water so water and energy are saved

4 0

3 years ago

Rocket-powered sleds are been used to test the responses of humans to acceleration. Starting from rest, one sled can reach a spe

erik [133]

Hi, I crunched some numbers for you and got the following results:

Starting from initial velocity of zero (rest) the sled reached a top speed of 257.3 m/s^2.
Upon slowing down or braking, the sled slowed down very hard to about 76.35 m/s^2.
Acceleration and Gravitational Acceleration were the main interpretations obviously in this problem.
Also, if my math was correct, the speed of the sled slowing down was around 7.7 G's (acceleration due to gravity)! That is about on par with the acceleration of a F-16 Fighter Jet pulling out of a dive!--> (79 m/s^2) The human test subject probably came close to blacking out I would guess as well or very close to!

4 0

3 years ago