K.E= 50,000 Joules= 1/2mv^2=1/2x1,000kgxv^2
v^2=2x50,000 Joules/1,000kg = 100m^2/v62
v=10m/s
The speed of the car is 10 m/s
Concave makes things smaller and convex makes things bigger
The energy absorbed by photon is 1.24 eV.
This is the perfect answer.
Answer:
(a) Relative speed of Sam = -7 mph
(b) Relative speed of George = 7 mph
Explanation:
We have given speed of Sam 65 mph in north direction.
And speed of George is 72 mph also in north direction
We have find the relative velocity of both Sam and George
(a) Speed of Sam relative to George = speed of Sam - speed of George = 65 -72 = -7 mph
(b) Speed of George with respect to Sam = speed of George - speed of Sam = 72-65 = 7 mph