Answer:
the angle must decrease to maintain balance and that the system remains motionless
Explanation:
In a system of a block in an inclined plane, using Newton's second law
X Axis Wₓ-fr = 0
Y Axis N - = 0
The equation for the force of friction is
fr = μ N
And using trigonometry for weight components
sin θ = Wₓ / W
cos θ = W_{y}/ W
Wₓ = W sin θ
W_{y} = W cos θ
We replace
Wₓ = fr
W sin θ = μ Wcos θ
tan θ = μ
If the coefficient of friction decreases the force of static friction decreases, ₓso the value of the tangent must decrease so the angle must decrease to maintain balance and that the system remains motionless or with constant speed
Answer:
observed frequency = 109.68 Hz
Explanation:
given data
speed u = 20.9 m/s
frequency f = 103 Hz
solution
we consider here speed of sound (v) is 343 m/s
so observed frequency is express as
observed frequency = f × ...............1
put here value and we get
observed frequency = 103 × \frac{343}{343-20.9}
observed frequency = 109.68 Hz
I think the answer is Gamma Rays
Answer:
a. 4.25 J
b. -14.90 J
Explanation:
a. Gravitational potential energy of stone-earth system before stone is released
E = MGY
M = mass = 0.31
G = gravity = 9.81
Y = 1.4
E = 0.31 x 9.81 x 1.4
E = 4.25J
b. Gravitational potential energy of stone-earth system when it reaches bottom of well
E = MGY
M= 0.31
G = 9.81
Y = -4.9
E = 0.31 x 9.81 x -4.9
E = -14.90 J
This answers the question.
B. Flipped compared to what is in the sky