C. sound waves and water waves
Explanation:
We have,
Height of object is 5 cm
Object distance from a convex lens is 18 cm
Focal length of convex lens is 10 cm
i.e. h = 5 cm
u = -18 cm
f = +10 cm
Let v is distance of the image from the lens. Using lens formula :
The magnification of lens is :
, h' is height of the image
h' = -5.00 cm (in three significant figures)
1.Phases - Gas, liquid and solid. Gas, liquid, and solid are known as the three states of matter or material, but each of solid and liquid states may exist in one or more forms.
Given :
Mass of brick, m = 2 kg.
Speed of block, v = 12 m/s .
To Find :
The momentum of the brick.
Solution :
We know, momentum of any object is given by :
Momentum = Mass × Speed
Momentum = m × v
Momentum = 2 kg × 12 m/s
Momentum = 24 kg m/s
Therefore, the momentum of the brick is 24 kg m/s .
Answer:
Acceleration: -9.8 m/s^2
Velocity: -28.2 m/s
Displacement: 143.1 m
Explanation:
The acceleration of gravity for any object close to earth is approximately -9.8 m/s^2.
Now, to find the velocity after 9 seconds, we can use a kinematics formula, where x is the final velocity:
<em>Final Velocity = Initial Velocity + Acceleration * Time</em>
x = 60 + -9.8*9
x = 60 - 88.2
x = -28.2
The velocity is -28.2 m/s.
Lastly, to find the displacement, we can use another kinematics formula, where y is the displacement:
<em>Displacement = (Final Velocity + Initial Velocity)/2 * Time</em>
y = (-28.2 + 60)/2 * 9
y = 143.1
The displacement is 143.1 meters.
