Answer:
Explanation:
Kinetic energy of block will be converted into heat energy by friction .
Heat energy produced = 1/2 m v²
= .5 x 4.8 x 1.2²
= 3.456 J
85% of energy is converted into heat energy , so heat energy produced
= .85 x 3.456 = 2.9376 J .
If Q heat is given to m mass of object having s as specific heat and Δt is increase in temperature
Q = msΔt
specific heat of iron s = 462 J / kg C
Putting the values ,
2.9376 = 4.8 x 462 x Δt
Δt = 13.24 x 10⁻⁴ ⁰C.
The root quadratic equation of is
What is the formula used to calculate the quadratic equation?
To solve the quadratic equation use the formula of
Find the quadratic equation by using the formula ?
On comparing with
We get ,
By using the formula,
For a quadratic equation of the form the solutions are
Apply rule,
Apply exponent rule,
if n is even
Multiply the numbers :
Add the number
Answer:
Angle of incidence
Explanation:
The diagram shows the reflection of a light ray.
When a light ray undergoes reflection:
- The incident ray, the reflected ray and the normal to the surface all lie in the same plane
- The angle of reflection is equal to the angle of incidence
The two angles are defined as follows:
- The angle of incidence is the angle between the incident ray and the normal to the surface (1)
- The angle of reflection is the angle between the reflected ray and the normal to the surface
In the picture, we see that the angle marked with X corresponds to the angle defined in (1), so it is the angle of incidence.
I feel like it is d . :) it could be a too so idrk
In near ideal gas conditions,particles gain kinetic energy when thermal energy is added Hence, individual particle move faster(and collide more often) than in the previous state.