This is the question
A perfect blackbody is an object that perfectly absorbs and emits radiation across all wavelengths. A very simple 'climate' model is to assume that the Earth is a perfect blackbody and that the temperature is uniform over the surface. Using this model and 6371km for the...
Assumption: Earth is a perfect blackbody. This means that the emissivity (ε) is 1.
Earth’s radius = 6371 km
Incident solar radiation = 1367 W/m2
Temperature in space = 0 K
I'm given the above data. I tried using the E= σεTe4 but that doesnt include the radius of the Earth :S
I know 1BTU = 1055J
1lb = 1/2.2046 kg
1 F = 255.928 K
then 1 BTU/lbF should be 1055/(1.2046)*255.928. But I get 9 plugging this in
the value is suppose to be 4186 J/kgK. this is the specific heat of water
Help me with some motors and generators Q!!
We are learning about motors and generators
But I got completely lost when we started talking about Michael Faraday's work, Electromotive force, Electromagnetic induction, Lenz Law
I get what Michael Faraday did, applying force to a...
I have 2 advantages of using rotational and orbital velocity of Earth in assisting easier rocket travel...
1. Uses less fuel as the rotational speed contributes to the rocket
2. Assists the rocket to easily produce the necessary escape velocity
Are there anymore adv??? I can't seem to...
I was always taught that current was the flow of electrons, a direction which negatively charged particles flow
but now we started to talk about conventional current where the positive particles are flowing..
I'm so confused... what specific positive charge is flowing?? and how come people...
Einstein postulated that reflection would be shown because he believe Principle of Relativity (Inertial frame cannot be detected without an outside frame of reference).
If you were traveling at speed of light and mirror relative to you also does then you would because if there is no...
Why is light the fastest ??
I don't get why nothing can be faster than light.
I know Einstein postulated that speed of light is constant and mass increases and energy increase.
But I am still confused as to why nothing can't exceed speed of light
Major difference of Inertial and non-inertial frame of reference ??
What is the major difference or differences of Inertial and non-Inertial frame of reference??
Is it only:
Inertial - Constant velocity, obeys the law of inertia
Non-inertial - Acceleration, disobeys the law of inertia
What does relative mean..!!
I still don't understand the meaning of relative.
I cannot breach onto the concept of Einstein's Principles of Relativity without knowing the meaning of it!!!
I searched the internet but all of the definitions listed makes no sense to me..