Answer:
speed is affected by the medium in wich the wave travels.
Explanation:
The speed of a wave is affected when traveling in different medium, depending on the medium in which the wave travels it can go faster or slower, or not even be able to travel in that medium.
For light waves, the denser the medium through which the wave travels, the slower it will go through it, as there is more resistance to the light particles.
And in waves like sound, which instead of particles is a vibration or disturbance in the medium, they travel faster in denser mediums such as metal, because the disturbance is transmitted more efficiently thanks to how close together that the particles are in the metal, This is why sound does not travel in a vacuum; there are not even particles to transmit the vibration.
Magnitude of the force = 50N
<u />
<u>Explanation:</u>
Let one force be X
And the second force be Y
Both the forces are perpendicular, so α = 90°
The resultant R of the two forces = 100N
Angle between resultant and 1 force, α = 60°
We know,
R² = X² + Y² + 2XYcos 90
100² = X² + Y²
If X makes an angle of Φ = 60°
Then, tan Ф = Y sin α / X + Y cos α
Putting the values we find,
tan 60 = Y/X
Y = √3X
Putting Y = √3X in equation 1 we get,
(X)² + (√3X)² = 100 X 100
4X² = 100 X 100
X² = 2500
X = 50N
Therefore, magnitude of the force = 50N
Answer:
Fossil Combustion Reactions
Explanation:
It's more efficient (I'll edit later)
If it is the same vehicle, then the 60mph vehicle has more kinetic energy since it is moving faster. Therefore, it requires more energy to stop, and if it is the same car with the same beak system, the braking distance of the 30mph car will be significantly shorter than the 60mph car.
Given
Car 1
m1 = 1300 kg
v1 = 20 m/s
m2 = 900 kg
v2 = -15 m/s
(Negative sign shows that direction of car 2 is opposite to car 1)
Procedure
As per the conservation of linear momentum, "The total momentum of the system before the collision must be equal to the total momentum after the collision". And this applies to the perfectly inelastic collision as well. Then the expression is,
Thus, we can conclude that the speed and direction of the cars after the impact is 5.68 m/s towards the first car.
