Answer:
Hmmm...
This is a bit tricky
Ok...
Negative Velocity means you're Moving in the Opposite direction....
Negative Acceleration (deceleration) means you're slowing down.
Deceleration would mean slowing down if you were Moving with a Positive velocity.
But In this case...
You're Moving with negative velocity and Negative acceleration...
This simply means that the acceleration and velocity vector are in the same direction....
Its means that...
"YOU'RE SPEEDING UP"
Just that you're doing it in the opposite direction.
Hope this helps.
Answer:
391.67Hz
Explanation:
The fundamental frequency formula in string is expressed as;
Fo = V/2L
V is the velocity of the wave = 329m/s
L is the length of the string = 42cm = 0.42m
Substitute
Fo = 329/2(0.42)
Fo = 329/0.84
Fo = 391.67Hertz
Hence the fundamental frequency of a mandolin string is 391.67Hz
I’m going to use molasses as an example of a substance.
The mass and volume both change when changing the amount of molasses.
However, the density does not change. This is because the mass and volume increase at the same rate/proportion!
Even though there is more molasses (mass) in test tube A, the molasses also takes up more space (volume). Therefore, the spacing between those tiny particles that make up the molasses is constant (does not change).
The size or amount of a material/substance does not affect its density.
Answer:
D) 24m, 300o
Explanation:
The vector A has magnitude of 12 m and it makes 120 degree with + ve x axis
So it can be represented by the vector as follows
A = 12 Cos 120 i + 12 sin 120 j
vector 2A = 24 Cos 120 i + 24 sin 120 j
- 2A = - 24 Cos 120 i - 24 sin 120 j
= 24 Cos ( 180 -120 ) - 24 sin ( 180 -120)
= 24 Cos 60 - 24 sin 60
= 24 Cos ( 360 - 60 ) + 24 sin ( 360 -60 )
= 24 Cos 300 + 24 sin 300
It represents a vector having magnitude of 24 and making 300 degree with + ve x- axes in anticlockwise direction.