The law of reflection states that the angle of incidence is equal to the angle of reflection.
2 answers:
Answer:
yes, it is true.
Explanation:
When a light ray falls on a highly smooth and polished surface, it bounces back into the same medium. This phenomenon is called reflection of light.
There are two laws of reflection.
1. The angle of incidence is equal to the angle of reflection.
2. Incident ray, reflected ray and the normal all lie in the same plane.
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Answer:
4515.49484 N
4329.10484 N
Explanation:
r = Radius of balloon = 4.4 m
m = Mass of balloon with instruments = 19 kg
g = Acceleration due to gravity = 9.81 m/s²
Volume of balloon
The Buoyant force = Weight of the air displaced
The buoyant force acting on the balloon is 4515.49484 N
Net force on the balloon
The net force on the balloon is given by 4329.10484 N
As the balloon goes up the pressure outside reduces as the density of air decreases while the air pressure inside the balloon is high hence, the radius of the balloon tend to increase as it rises to higher altitude.
By definition, the density of an object is given by:
Where,
M: mass of the object
V: volume of the object
Since the mass and volume of an object are numerical values greater than zero, then it follows that:
It is important to respect the units of each measure.
For this case we can use the grams for the mass and cubic centimeters for the volume.
Answer:
A possible value for density is given by: