Answer:
1.33
Explanation:
According to snell's law,
n = sin(a)/sin(b)
Given
a = 25.0°
b = 18.5°
Substitute
n = sin25/sin18.5
n = 0.4226/0.3173
n = 1.33
Hence the index of refraction nb for this type of glass is 1.33
Answer:
20 K
Explanation:
It is given that,
The change in temperature is 20 C.
We need to find the change in thermodynamic temperature.
If teperauture T₁ = 0° C = 0+273 = 273 K
T₂ = 20° C = 20 + 273 = 293 K
The change in temperature,
So, the change in temperature of 20°C is equivalent to 20 K.
Answer:
Answered
Explanation:
I disagree with my friend because, the primary difference is not in the kind of atoms, rather it is the arrangement of atoms and molecules that distinguishes solids and liquids.
Atoms are closely packed in solid and hence large cohesive forces act between atoms in solids whereas in liquids atoms are at a distance from each other, hence, less cohesive force act between it's atoms. Moreover, due to loose packing in liquids atoms are free to move in space and hence liquids can flow whereas solids cannot.
Answer: 9.81m/s^2
Explanation: since it’s free fall and friction is neglected, the magnitude of the ball’s acceleration will be equal to the general acceleration due to gravity which is 9.81m/s^2
The point with the greatest potential energy is B.
The potential energy of an object is depends on the relative distance between the object and the ground and its mass. The higher the object is from the ground the greater the potential energy posses.
Potential energy (P.E) = mgh
Where m is the mass, g is the gravity and h is the height from the ground to where the object is.
Since the mass and gravity is constant in this case, only the height will determine the point with the greatest P.E and that point is B.
