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3 years ago

Which math formula will find density?

Physics

2 answers:

Sedbober [7]3 years ago

8 0

Mass/volume is the formulae

Kipish [7]3 years ago

7 0

the 3 is the right answer.

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In a particular case of Compton scattering, a photon collides with a free electron and scatters backwards. The wavelength after

mafiozo [28]

Answer:

hence initial wavelength is $\lambda =4.86\times10^{-12}m$

Explanation:

shift in wavelength due to compton effect is given by

$\lambda ^{'}-\lambda =\frac{h}{m_{e}c}\times(1-cos\theta )$

λ' = the wavelength after scattering

λ= initial wave length

h= planks constant

m_{e}= electron rest mass

c= speed of light

θ= scattering angle = 180°

compton wavelength is

$\frac{h}{m_{e}c}= 2.43\times10^{-12}m$

$\lambda '-\lambda =2.43\times10^{-12}\times(1-cos\theta )$

$\lambda '-\lambda =2.43\times10^{-12}\times(1+1 )$ ( put cos 180°=-1)

also given λ'=2λ

putting values and solving we get

$\lambda =4.86\times10^{-12}m$

hence initial wavelength is $\lambda =4.86\times10^{-12}m$

4 0

4 years ago

During a hard sneeze, your eyes might shut for 0.32 s. If you are driving a car at 76 km/h during such a sneeze, how far does th

garik1379 [7]

Answer:

Distance, d = 6.75 meters

Explanation:

Given that,

Time taken by the eyes to shut during a hard sneeze, t = 0.32 s

Speed of the car, v = 76 km/h = 21.11 m/s

We need to find the distance covered by the car during this time. The product of speed and the time taken by the car is called the distance covered by the it. Mathematically,

$d=v\times t$

$d=21.11\times 0.32$

d = 6.75 meters

So, the car will cover 6.75 meters during that time. Hence, this is the required solution.

8 0

3 years ago

what is the force of friction between an 80kg box and the ground on Earth if the coefficient is 0.2?

Reil [10]

Answer:

160N

Explanation: When 80kg mass is one group . It's reaction force acting on a ground.

Weight of the object = 80*10

= 800 N

Here we are given cofficient of static friction its 0.2. It should be smaller than 1

Friction force = Reaction * Friction Cofficient

Reaction = 800N ( Considering Vertical Equilibrium )

F = 800* 0.2

F = 160N

3 0

3 years ago

Read 2 more answers

Which of the following is not a part of the Solar System?

bearhunter [10]

D) the north star is not part of our solar system...
hope this helps!

8 0

3 years ago

Read 2 more answers

A teacher explains that a scientist named Boyle did many experiments to determine what the relationship is between the volume an

lina2011 [118]

<span>Boyle's Law, because it describes what will happen in the relationship between the pressure and volume of the gas.</span>

4 0

3 years ago