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larisa86 [58]
4 years ago
6

The Cosmic Background Radiation Outer space is filled with a sea of photons, created in the early moments of the universe. The f

requency distribution of this "cosmic background radiation" matches that of a blackbody at a temperature near 2.7K.What is the peak frequency of this radiation in Hz?What is the wavelength that corresponds to the peak frequency in mm?
Physics
1 answer:
lions [1.4K]4 years ago
8 0

A) Peak wavelength: 1.07 mm

The peak wavelength of the Cosmic Background Radiation can be found by using Wien's displacement law:

\lambda = \frac{b}{T}

where

\lambda is the peak wavelength

b=2.898\cdot 10^{-3}m\cdot K is Wien's displacement constant

T is the absolute temperature

For the Cosmic Background Radiation,

T = 2.7 K

So the peak wavelength is

\lambda = \frac{2.898\cdot 10^{-3}m\cdot K}{2.7 K}=1.07\cdot 10^{-3} m=1.07 mm

B) Peak frequency: 2.8\cdot 10^{11}Hz

The peak frequency can be found by using the relationship:

f=\frac{c}{\lambda}

where

c=3.0\cdot 10^8 m/s is the speed of light

\lambda is the peak wavelength

Substituting numbers, we find

f=\frac{3.0\cdot 10^8 m/s}{1.07\cdot 10^{-3} m}=2.8\cdot 10^{11}Hz

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A baseball has a mass of 145 g. a bat exerts a force of 18,400 n on the ball. what is the acceleration of the ball? 1.27 x 102 m
fomenos

The acceleration of the ball is 1.27 X 10⁵ m/s²

The Newtons second law states that the acceleration of an object is dependent upon two variables - the net force acting upon the object and the mass of the object.

Given,

Mass = 145 kg

Force = 18,400 N

We need to calculate the acceleration

Using formula of acceleration(a)

a = F/m  where F= force and m= mass

Put the values in the formula,

 a = 18,400/(145 X 10⁻³) = 1.27 X 10⁵ m/s²

Therefor, the acceleration of the ball is 1.27 X 10⁵ m/s².

Learn more about the Newton's second law with the help of the given link:

brainly.com/question/27573481

#SPJ4

7 0
2 years ago
A car has a mass of 1800 Kg. If the cars engine provides a net forward force of 3600 N, what is the acceleration of the car
viva [34]

Answer:

<h2>2 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m}  \\

f is the force

m is the mass

From the question we have

a =  \frac{3600}{1800}  =  \frac{36}{18}   = 2\\

We have the final answer as

<h3>2 m/s²</h3>

Hope this helps you

6 0
3 years ago
Which type of thermal energy transfer warms your hand when you hold it near a glass of hot water?
NeTakaya

Answer: the answer is radiation

Explanation: Radiation, because heat travels in all directions Convection, because heat travels in all directions Conduction, because heat travels from hot to cold Radiation, because heat travels from cold to hot.

8 0
3 years ago
PLS HELP FOR THIS PHYSICS TEST <br><br> (pls only answer if u rlly know, this is an important test)
lesya692 [45]

Answer:

C. 8.01 m/s²

Explanation:

vf²= vi² + 2 • a • d

2ad = vf² - vi²

a = (vf²- vi²)/2d

d=25.00 -5.00=20.00 m

vi =0

vf=17.90 m/s

a =(17.90² -0²)/(2*20) = 8.01 m/s²

<h2></h2>
4 0
3 years ago
Could you help me with a science question really quick?
Rama09 [41]
Yea I would love to help u
4 0
3 years ago
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