1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
shtirl [24]
3 years ago
15

A star has a surface temperature of 30,000 K. At what wavelength does the peak radiation occur? 100 nm

Physics
2 answers:
tangare [24]3 years ago
8 0
Use the displacement law, peak wavelength = 0.0029/T =0.0029/30000 = 97nm
Eva8 [605]3 years ago
8 0

Answer : Wavelength is 97 nm.

Explanation :

It is given that,

The surface temperature of a star, T=30,000\ K

We have to find the wavelength where the peak radiation occurs.

We can find the wavelength using Wein's displacement law i.e.

\lambda=\dfrac{b}{T}

b is the Wein's constant b=2.88\times 10^{-3}m.K

So, \lambda=\dfrac{2.88\times 10^{-3}\ m.K}{30,000\ K}

\lambda=9.6\times 10^{-8}\ m

or \lambda=97\ nm

Hence, the correct option is (b).        

You might be interested in
A _______ is a very massive object in space that does not allow any object or radiation to escape its gravitational hold.
marysya [2.9K]
Black hole, it sucks in pretty much everything in its path
5 0
4 years ago
Read 2 more answers
PLEASE HEELP!!!
Ann [662]

Answer:

The "pressure" of the electricity is electric potential. Electric potential is the amount of energy available to push each unit of charge through an electric circuit. The unit of electric potential is the volt. ... A volt is the force needed to move one amp through a conductor that has 1 ohm of resistance

8 0
3 years ago
You are helping two friends from our class with a physics problem where a cart is pushed up a ramp. In examining the motion of t
stiks02 [169]

Answer: Acceleration will have 2 components, vertical and horizontal.

Net-vertical component can be positive, zero or negative depending upon the magnitude of the upward component of the applied acceleration.

Net-horizontal acceleration will  be equal to the horizontal component of the applied acceleration.

Explanation:

Since acceleration is a vector quantity and the cart is being pushed up the ramp, the ramp would be at some angle to the horizontal and hence there will be vertical and horizontal components of acceleration.

<u>For vertical acceleration:</u>

If the magnitude of the upward component of the applied acceleration is greater than the value of the acceleration due to gravity then the net vertical acceleration will be upward because it will overtake the value of acceleration due to gravity.

In case the upward component of the applied acceleration is lesser than the value of the acceleration due to gravity then the net vertical acceleration will be downward.

<u>For horizontal acceleration:</u>

This component remains unaffected and is equal to the horizontal component of the applied acceleration because there is no other acceleration acting in the horizontal direction.

But the net acceleration will not be solely in the vertical or horizontal direction because the block has to move forward on the inclined ramp so there will always exist a horizontal and a vertical component making the net acceleration to parallel to the ramp in upward direction if the body is going up the ramp.

8 0
3 years ago
Read 2 more answers
In which condition is relative velocity known by adding the velocity od the first body and that of the second body ?​
Softa [21]

Answer:

when a two bodies A and B are moving at an angle 180° with each other then the relative velocity is the sum of bodies the velocity .i.e,

when the bodies move the opposite direction

then their relative velocity is the sum of individual velocities.

3 0
3 years ago
If 1.00 mol of argon is placed in a 0.500-L container at 28.0 ∘C , what is the difference between the ideal pressure (as predict
Rudik [331]

Answer:

1.98 atm

Explanation:

Given that:

Temperature = 28.0 °C

The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

T₁ = (28 + 273.15) K = 301.15 K

n = 1

V = 0.500 L

Using ideal gas equation as:

PV=nRT

where,  

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L atm/ K mol  

Applying the equation as:

P × 0.500 L = 1 ×0.0821 L atm/ K mol  × 301.15 K

⇒P (ideal) = 49.45 atm

Using Van der Waal's equation

\left(P+\frac{an^2}{V^2}\right)\left(V-nb\right)=nRT

R = 0.0821 L atm/ K mol  

Where, a and b are constants.

For Ar, given that:

So, a = 1.345 atm L² / mol²

b =  0.03219 L / mol

So,  

\left(P+\frac{1.345\times \:1^2}{0.500^2}\right)\left(0.500-1\times 0.03219\right)=1\times 0.0821\times 301.15

P+\frac{1.345}{0.25}=\frac{24.724415}{0.46781}

P=\frac{24.724415}{0.46781}-\frac{1.345}{0.25}

⇒P  (real) = 47.47 atm

Difference in pressure = 49.45 atm - 47.47 atm = 1.98 atm

4 0
3 years ago
Other questions:
  • A 40kg-skier starts at the top of a 12-meter high slope. At the bottom, she is traveling 10 m/s. How much energy does she lose t
    10·2 answers
  • The description for a certain brand of house paint claims a coverage of 475 ft²/gal.
    8·1 answer
  • A point charge of 4.0 µC is placed at a distance of 0.10 m from a hard rubber rod with an electric field of 1.0 × 103 . What is
    11·2 answers
  • State the law of universal gravitation, and use examples to explain how changes in mass and changes in distance affect gravitati
    5·1 answer
  • A 2.0 kg particle moves in a circle of radius 3.1 m. As you look down on the plane of its orbit, the particle is initially movin
    5·2 answers
  • Metals in group 1 on the periodic table most commonly form which type of ion
    10·1 answer
  • What's the name for how you see the world through your perception<br> in cognitive theory.
    10·2 answers
  • Mark all the units for speed
    7·1 answer
  • Which quantity does not change when there is an increase in temperature?​
    12·1 answer
  • Anything that has mass and occupies space is defined as.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!