Answer:
2.17 x 10^8 m/s
Explanation:
Angle of incidence, i = 30 degree, refractive index of mineral oil, n = 1.38
Let r be the angle of refraction.
By use of Snell's law
n = Sin i / Sin r
Sin r = Sin i / n
Sin r = Sin 30 / 1.38
Sin r = 0.3623
r = 21.25 degree
Let the speed of light in oil be v.
By the definition of refractive index
n = c / v
Where c be the speed of light
v = c / n
v = ( 3 x 10^8) / 1.38
v = 2.17 x 10^8 m/s
The transfer of thermal energy as heat requires a difference in temperature between the two points of transfer. Heat may be transferred by means of conduction, convection, or radiation. Conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object.
Answer:
0.4
Explanation:
A concave lens is a diverging lens, so it will always have a negative focal length. Image distance is always negative for a concave lens because it forms virtual images.
From the lens formula;
1/f = 1/u+ 1/v
- 1/2 = 1/3 - 1/v
1/v = 1/3 + 1/2
v= 6/5
v= 1.2 cm
Magnification = image distance/object distance
Magnification = 1.2cm/3cm
Magnification = 0.4
Answer:
Diaplacement s=1.80km
Final velocity v=360km/h
It starts from rest. So, initial velocity u=0
We need to find the constant acceleration (a).
using the equation of motion v
2
=u
2
+2as
360
2
=0
2
+2×a×1.8
a=
3.6
360×360
a=36000km/h
2