In the case of metal, it comtains delocalised electrons which can move freely throughout the metal. when heat is applied to one end of the metal, the atoms and delocalised electrons gain more kinetic energy and move faster and they hit the neighbouring atoms more and heat is transfer theoughout the matal through conduction.
Answer:
c) true. With the magnetic field you can determine the Poynting vector and this is equal to the intensity of the wave
Explanation:
An electromagnetic wave carries energy that is given by the vector of poyntíng
S = 1 / μ₀ E x B
The electric and magnetic fields are related
E = c B
Substituting
S = c /μ₀ B² / 2
The two comes from the average value
Let's examine the claims
a) false to determine the wavelength the frequency is needed
b) False. To find the electric field you need the magnetic field
c) true. With the magnetic field you can determine the Poynting vector and this is equal to the intensity of the wave
The molecules making up object collide with the molecules of the other and some of the kinetic energy from a warmer object is transferred to the cooler one.
Answer:
Explanation:
From, the given information: we are not given any value for the mass, the proportionality constant and the distance
Assuming that:
the mass = 5 kg and the proportionality constant = 50 kg
the distance of the mass above the ground x(t) = 1000 m
Let's recall that:
Similarly, The equation of mption:
replacing our assumed values:
where
So, when the object hits the ground when x(t) = 1000
Then from above derived equation:
By diregarding
1000 + 0.981 = 0.981 t
1000.981 = 0.981 t
t = 1000.981/0.981
t = 1020.36 sec