Answer:
3.09 m/s²
Explanation:
Given:
Δx = -105 m
v₀ = -27.7 m/s
v = -10.9 m/s
Find: a
v² = v₀² + 2aΔx
(-10.9 m/s)² = (-27.7 m/s)² + 2a (-105 m)
a = 3.09 m/s²
Answer:
Explanation:
Let the time taken by the shot to reach to maximum height is t.
initial velocity, vi
angle of projection, θ
Acceleration, g
At maximum height, the vertical component of velocity is zero.
use first equation of motion in vertical motion
elastic is the correct answer
Answer:
The ratio of the speed of light in a vacuum to the speed of light in the material it is passing through
Explanation:
- Index of refraction also called refractive index is the ratio of the sine of angle of incidence to the sine of angle of refraction, this is according to the Snell's Law.
- <u>The value of index of refraction</u> may be calculated from the ratio of the speed of light in vacuum to the speed of light in a second medium of a greater density.
- Therefore,<em><u> refractive index refers to the speed of light in a vacuum divided by the speed of light in the medium.</u></em>
Answer:
23.63 °C
Explanation:
= mass of water = 0.250 kg
= initial temperature of water = 20.0 °C
= Specific heat of water = 4186 J/(kg °C)
= mass of aluminum = 0.400 kg
= initial temperature of aluminum = 26.0 °C
= Specific heat of aluminum = 900 J/(kg °C)
= mass of copper = 0.100 kg
= initial temperature of copper = 100 °C
= Specific heat of copper = 386 J/(kg °C)
= Final temperature of mixture
Using conservation of heat
( - ) + ( - ) + ( - ) = 0
(0.250) (4186) ( - 20) + (0.400) (900) ( - 26) + (0.100) (386) ( - 100) = 0
= 23.63 °C