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2 years ago

on cloudless nighs, heat escapes from our planet and goes into empty space A.conduction B.convection C.radiation

2 answers:

6 0

Convention.

On cloudless nighs, heat escapes from our planet and goes into empty space <span>convection.</span>

PIT_PIT [208]2 years ago

5 0

On cloudless nighs, heat escapes from our planet and goes into empty space is an example of convection.

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PLEASE HELP The graph shows the amplitude of a passing wave over time in seconds (s). What is the approximate frequency of the w

d1i1m1o1n [39]

Answer:

$F = 0.3\ Hz$

Explanation:

Given

See attachment for the graph

Required

Determine the frequency

Frequency (F) is calculated as:

$F = \frac{1}{T}$

Where

T = Time to complete a period

From the attachment, the wave complete a cycle or period in 3 seconds..

So:

$F = \frac{1}{3s}$

$F = 0.333\ Hz$

$F = 0.3\ Hz$ --- Approximated

7 0

2 years ago

Read 2 more answers

Magnet attracts nails but not copper vessels

Inessa [10]

Copper is a metal but it is not magnetic like a magnet

7 0

2 years ago

Problem 12: A 20.0-m tall hollow aluminum flagpole is equivalent in strength to a solid cylinder 4.00 cm in diameter. A strong w

avanturin [10]

Answer:

The deformation in the pole due to force is 0.70 mm.

Explanation:

Given that,

Height = 20.0 m

Diameter = 4.00 cm

Force = 1100 N

We need to calculate the area

Using formula of area

$A=\pi\times r^2$

$A=\pi\times(2.00\times10^{-2})^2$

$A=0.00125\ m^2$

$A=1.25\times10^{-3}\ m^2$

We need to calculate the deformation

Using formula of deformation

$\Delta x=\dfrac{1}{s}(\dfrac{F}{A}\times L)$

Where, s = shear modulus

F = force

l = length

A = area

Put the value into the formula

$\Delta x=\dfrac{1}{2.5\times10^{10}}\times(\dfrac{1100}{1.25\times10^{-3}}\times 20.0)$

$\Delta x=0.000704\ m$

$\Delta x=7.04\times10^{-4}\ m$

$\DElta x=0.70\ mm$

Hence, The deformation in the pole due to force is 0.70 mm.

3 0

3 years ago

What three farming methods increase the rate of soil erosion?

dimaraw [331]

<span>
planting the same crops consistently without roations, over irrigating to the point where it is streams of water instead of farm lanf and deep plowing that exposes the delicate soil to the air resistance causing it to harden </span>

5 0

3 years ago

The superposition of mechanical waves can be observed in the movement of

Angelina_Jolie [31]

I found your question in a worksheet and since you listed no options if I'm correct, the options were
A. Bumper Cars
B. waves in a ripple tank.
C. electromagnetic radiation
D. an orchestra
Well technically all of the above would be correct since the matter waves are real but have relatively short wavelengths that aren't immediately obvious and what we see is really just the superposition of matter waves, the best answer would be B, waves in a ripple tank.

5 0

3 years ago