Answer:
Because radiation does not require material medium for its propagation.
Explanation:
Radiation is one of the types of modes of heat transfer that takes place majorly in gases. Heat energy can be transferred through gases by radiation without heating up the intervening medium. Even, if the available molecules of gases are evacuated, the heat energy would propagate.
Thus, student's hands were not heated by convection since convection is a mode where material medium is required for propagation of heat energy.
Answer:
R₁ = 14.44 R₂
Explanation:
For sun-earth system
GMm/R² = mω²R
GM =ω²R³
GM₁ =ω₁²R₁³
For star - planet system
GM₂ =ω₂²R₂³
Dividing
M₁ / M₂ = ω₁²R₁³ / ω₂²R₂³
R₁³ /R₂³ = M₁ω₂² / ω₁²M₂
= M₁T₁²/T₂²M₂
Given
M₁ / M₂ = 1 / 0.7
T₁ = 365 days
T₂ = 9.5 days
R₁³ /R₂³ = M₁²365² /9.5² (.7M₁ )²
(R₁ /R₂)³ =365² / 9.5² X .7²
= 3012
R₁ /R₂
= 14.44
R₁ = 14.44 R₂
If you want to change the thermos into an open energy system, you have to remove the lid. Once the lid is removed, the energy is no longer contained inside the thermos bottle. From the bottle, the energy dissipates to the environment.
From ideal gas law, PV=nRT
where P is the pressure, V is the volume of the container, n is number of moles, R is the gas constant and T is the temperature.
Hence,
T= 110.65 k
Kinetic Energy =
K.E=
<h3>What is a kinetic energy? </h3>
The energy an object has as a result of motion is known as kinetic energy.
A force must be applied to an object in order to accelerate it. We must put in effort in order to apply a force. After the work is finished, energy is transferred to the item, which then moves at a new, constant speed. Kinetic energy is the type of energy that is transferred and is dependent on the mass and speed attained.
Kinetic energy can be converted into other types of energy and transported between objects. A flying squirrel may run into a chipmunk that is standing still, for instance. Some of the squirrel's initial kinetic energy may have been transferred to the chipmunk or changed into another kind of energy after the collision.
To know more about kinetic energy, visit:
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Answer:
Angle of incidence
Explanation:
When light is reflected from a surface, the angle of incidence is always equal to the angle of reflection, where both angles are measured from the path of the light to the normal to the surface at the point at which light strikes the surface. This equality is known as the law of reflection.