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2 years ago

P waves can travel through Earth's outer core, but S waves cannot. Because of this, scientists know

Physics

2 answers:

eduard2 years ago

5 0

Answer:

The answer is B

please mark me brainliest

Explanation:

Thepotemich [5.8K]2 years ago

5 0

Answer:

The answer is C

Explanation:

<h2>The outer core is about 1,400 miles thick, and it's made mostly of a combination (called an alloy) of <u><em>iron</em></u> and nickel, along with small amounts of other dense elements like gold, platinum, and uranium.</h2>

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3. Two spherical objects at the same altitude move with identical velocities and experience the same drag force at a time t. If

Daniel [21]

Answer:

Object 2 has the larger drag coefficient

Explanation:

The drag force, D, is given by the equation:

$D = 0.5 c \rho A v^2$

Object 1 has twice the diameter of object 2.

If $d_2 = d$

$d_1 = 2d$

Area of object 2, $A_2 = \frac{\pi d^2 }{4}$

Area of object 1:

$A_1 = \frac{\pi (2d)^2 }{4}\\A_1 = \pi d^2$

Since all other parameters are still the same except the drag coefficient:

For object 1:

$D = 0.5 c_1 \rho A_1 v^2\\D = 0.5 c_1 \rho (\pi d^2) v^2$

For object 2:

$D = 0.5 c_2 \rho A_2 v^2\\D = 0.5 c_2 \rho (\pi d^2/4) v^2$

Since the drag force for the two objects are the same:

$0.5 c_1 \rho (\pi d^2) v^2 = 0.5 c_2 \rho (\pi d^2/4) v^2\\4c_1 = c_2$

Obviously from the equation above, c₂ is larger than c₁, this means that object 2 has the larger drag coefficient

8 0

3 years ago

HELP

liq [111]

It means that the soccer ball is a soccer ball bc it’s a soccer ball yk ?

7 0

3 years ago

How fast does water flow from a hole at the bottom of a very wide, 7.1 mm deep storage tank filled with water

trapecia [35]

Answer:

<h2>The water will move faster</h2>

Explanation:

This happens as part of the consequences of the continuity of an incompressible fluid, of which water is an example.

so as the water emerges from the wider section the flow velocity increases and vice versa.

Hence the flow velocity in indirectly proportional to the area

The continuity equation is given below for our analysis

$A1V1=A2V2\\$ -------------------1

where

A1= the area of the wider section of the tank

V1= the flow velocity from the wider section

A2= the area of the hole at the bottom

V2= velocity of flow at the bottom.

5 0

3 years ago

Waves travel along a 100-m length of string which has a mass of 55 g and is held taut with a tension of 75 N. What is the speed

Dvinal [7]

Answer:

$v=369.27\frac{m}{s}$

Explanation:

The speed of the waves in a string is related with the tension and mass per unit length of the string, as follows:

$v=\sqrt\frac{T}{\mu}$

First, we calculate the mass per unit length:

$\mu=\frac{m}{L}\\\mu=\frac{55*10^{-3}kg}{100m}\\\mu=5.5*10^{-4}\frac{kg}{m}$

Now, we calculate the speed of the waves:

$v=\sqrt\frac{75N}{5.5*10^{-4}\frac{kg}{m}}\\v=369.27\frac{m}{s}$

8 0

3 years ago

brainly an electric heating element is connected to a 110V circuit and a current of 3.2A is flowing through the element. how muc

Naya [18.7K]

Energy used by the element = 6336000 j

The electrical energy is given by

E= V i t

V= voltage= 110 V

i= current=3.2 A

t= time= 5 h= 5 (3600)= 18000 s

so energy= E= 110 (3.2)(18000)

E=6336000 J

3 0

3 years ago