Which is a diatomic molecule?A.He B.O2 C.NaCl D.CuF2

As part of previous adventures, formerly conjoined identical twin, Sue, is now 13.4 years younger than her identical twin Lou. (

8_murik_8 [283]

Answer:

Difference in Twin's Ages = 12.68 years

Explanation:

Using special theory of relativity's time dilation phenomenon, we first find the time that is passed on earth during Lou's trip.

t = t₀/[√(1 - v²/c²)]

where,

t = time measured by the person in relative motion = 1 year

t₀ = time measured by the person at rest = ?

v = speed of relative motion = 0.96 c

c = speed of light

Therefore,

1 year = t₀/[√(1 - 0.96² c²/c²)]

1 year = t₀/[√(1 - 0.9216)]

(1 year)(0.28 year) = t₀

t₀ = 0.28 year

Let,

y = Sue's age

x = Lou's age

so,

x - y = 13.4 years

but, after this trip Lou has aged 1 year, and on earth only 0.28 years passed so, Sue has aged only 0.28 years. Therefore,

x = x + 1

y = y + 0.28

Therefore,

(x + 1 year) - (y + 0.28 year) = 13.4 years

x - y = 13.4 years - 0.72 year

x - y = 12.68 years

Difference in Twin's Ages = 12.68 years

6 0

4 years ago

Please answer someone!!

Naily [24]

Answer:

10m

Explanation:

3 0

3 years ago

Power of sunlight on Earth The Sun emits about 3.9 * 1026 J of electromagnetic radiation each second. (a) Estimate the power tha

ratelena [41]

Answer:

a)6.34 x $10^{7}$ W/m²

b)1.37 x $10^{3$ W/m²

c) see explanation.

Explanation:

a)The relation of intensity'I' of the radiation and area 'A' is given by:

I= P/A

where P= power of sunlight i.e 3.9 x $10^{26}$ J

and the area of the sun is given by,

A= 4π $R_{sun}$ => 4π $(\frac{1.4*10^{9} }{2} )^{2}$

A=6.15 x $10^{18}$ m²

$I_{sun}$ = 3.9 x $10^{26}$ / 6.15 x $10^{18}$ => 6.34 x $10^{7}$ W/m²

b) First determine the are of the sphere in order to determine intensity at the surface of the virtual space

A= 4π $R$

Now R= 1.5 x $10^{11$ m

A= 4π x 1.5 x $10^{11$ =>2.83 x $10^{23$ m²

The power that each square meter of Earths surface receives

$I_{earth$ = 3.9 x $10^{26}$ /2.83 x $10^{23$ =>1.37 x $10^{3$ W/m²

c) in part (b), by assuming the shape of the wavefront of the light emitted by the Sun is a spherical shape so each point has the same distance from the source i.e sun on the wavefront.

6 0

3 years ago

An opera singer breaks a crystal glass with her voice. Which best explains why this occurs? The pitch of her voice matches the p

aalyn [17]

The frequency at which the body vibrates breaks is natural frequency. The glass with her voice because the frequency of her voice matches the natural frequency of the glass.

<h3>What is the natural frequency?</h3>

When there is no external force acting on the body unless the body vibrates is known as the natural frequency of vibration.it is denoted by $\rm w_n$ .