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4 years ago

If you wanted to increase the gravitational force between two objects what would you do

Physics

2 answers:

adelina 88 [10]4 years ago

6 0

Double the force on the object

Serhud [2]4 years ago

4 0

it would decrease the distance

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Bricks and insulation are used to construct the walls of a house. The

ira [324]

Answer:

$\dot Q=350.438\ W$

Explanation:

Given:

<u>the thermal resistance in the form of </u>

$R_1=\frac{x_1}{k_1} =0.095\ m^2.^{\circ}C.W^{-1}$

$R_2=\frac{x_2}{k_2} =0.704\ m^2.^{\circ}C.W^{-1}$

where:

$x_1\ \&\ x_2$ are the thickness of the respective bricks

$k_1\ \&\ k_2$ are the respective coefficient of conductivity

temperature inside the house, $T_h=24\ ^{\circ}C$

temperature outside the house, $\ T_c=10^{\circ}C$

area of the wall, $A=20\ m^2$

Since the bricks and insulation are used to construct a wall then they must be used in series for better shielding.

<u>Using Fourier's law:</u>

$\dot Q=k.A.\frac{dT}{x}$

$\dot Q={dT}\div {\frac{x}{k.A} }$

in series the resistances get add up

$\dot Q=dT\div (\frac{x_1}{k_1.A}+\frac{x_2}{k_2.A} )$

$\dot Q=(24-10)\div (\frac{0.095 }{20}+ \frac{0.704 }{20} )$

$\dot Q=350.438\ W$

7 0

4 years ago

The electromagnetic wave that CT scans are based on is called

alina1380 [7]

Answer:

X-rays

Explanation:

Electromagnetic waves are wave that do not require a material medium for transmission and they travel with a speed of light,
Electromagnetic waves have a wide range of applications in medicine, for example use of x-rays in medicine in CT scans.
CT scans uses X-rays to produce a cross-sectional image of the body or the part of the tissue being studied using x-rays and a computer.

8 0

4 years ago

Read 2 more answers

The "escape velocity" from Earth (the speed required to escape Earth's gravity) is 2.5 × 104 miles per hour. What is this speed

ANEK [815]

Answer:

2.5 × 10⁴ mi/h = 1.1 × 10⁴ m/s

Explanation:

Hi there!

We have the following equivalencies:

1 mile = 1609 m

1 hour = 3600 s

Then to convert miles to meters, we can multiply the given quantity in miles by ( 1609 m/ 1 mile) and we will obtain the same quantity in meters. In the same way, if we want to convert hours into seconds, we can multiply the given quantity in hours by (3600 s/ 1 hour) and we will obtain seconds.

Let´s convert miles per hour into m/s:

$2.5*10^{4} \frac{mi}{h} (\frac{1609m}{1mi})(\frac{1h}{3600s})$ = 1.1 × 10⁴ m/s (notice how the units mi and h cancel)