Light waves are electromagnetic waves. Electromagnetic waves are waves which means that they are disturbances in a particular physical medium and result in oscillations, but they differ from all other waves because they consist of 2 waves oscillating perpendicular to each other.One of these waves is an oscillating magnetic field and the other is electric.
Electromagnetic waves are characterized with their wavelength (lambda).
No all electromagnetic waves are visible to humans. The visible spectrum is the light that we can see with our eyes is only a small fraction from the whole spectrum.
The friction force has a 2 N force.
The static friction coefficient that exists between the project and the surface should be multiplied to provide the friction force. When the surface is thought of as horizontal, the normal force should be equal to the weight of the block and should also be directed in the opposite direction.
the friction force is therefore
= 0.5*N = 0.5* (10)
= 5
The friction force is greater than the force acting on the block, which is why there is no movement of the object even though it should be the reverse. Furthermore, the actual force needs to be equal.
The friction force here should therefore be 2N.
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A 2.0-N force acts horizontally on a 10-N block that is initially at rest on a horizontal surface. The coefficient of static friction between the block and the surface is 0.50. What is the magnitude of the frictional force that acts on the block?
Answer:
204.5 molecules
Explanation:
Pressure, P = 1.01 x 10^-13 Pa
Volume, V = 9.28 cm^3 = 9.28 x 10^-6 m^3
Temperature, T = 332 K
Gas constant, R = 8.314 in MKS system
Let n be the number of moles
Use ideal gas equation
P x V = n x R x T
1.01 x 10^-13 x 9.28 x 10^-6 = n x 8.314 x 332
n = 3.396 x 10^-22
According to the Avagadro's law
1 mole of the substance contains = 6.023 x 10^23 molecules
so, 3.396 x 10^-22 moles contains = 6.023 x 10^23 x 3.396 x 10^-22
= 204.5 molecules
Answer:
Explanation:
If H be the heat flowing in time t through an area of A having thickness d
H = k A x ( θ₂ - θ₁ ) t / d , k is thermal conductivity , ( θ₂ - θ₁ ) is temperature difference of walls
putting the given values
= (1.12 x 2.8x 5 x 9 x 16.7 x 60 x 60) / .08
= 1.06 x 10⁸ J .