Answer: vibrate
Explanation:
The object in air can be particular objects or substances.
Sound is actually vibration of waves through a medium. The medium can be liquid, solid or gas.
Therefore, the one word that will complete and make the sentence to make sense is ' vibrate '
Answer:
392 N
Explanation:
Draw a free body diagram of the rod. There are four forces acting on the rod:
At the wall, you have horizontal and vertical reaction forces, Rx and Ry.
At the other end of the rod (point X), you have the weight of the sign pointing down, mg.
Also at point X, you have the tension in the wire, T, pulling at an angle θ from the -x axis.
Sum of the moments at the wall:
∑τ = Iα
(T sin θ) L − (mg) L = 0
T sin θ − mg = 0
T = mg / sin θ
Given m = 20 kg and θ = 30.0°:
T = (20 kg) (9.8 m/s²) / (sin 30.0°)
T = 392 N
False, his first law states: An object that's in motion will remain in motion at a constant velocity unless it's acted on by an unbalanced force.
Answer:
350x
Explanation:
In a microscope the objective has higher magnification than the eyepiece so, this is a microscope
The magnification of a microscope is given by the product of the magnifications of the eyepiece and and the objective.
Objective lens magnification = 35x =
Eyepiece magnification = 10x =
Total magnification
Total magnification is 350x
Answer:
the moment of inertia of this system of masses about the y-axis is 99 kgm²
Explanation:
Given the data in the question;
mass m₁ = 5.0 kg at point ( 3.0, 4.0 )
mass m₂ = 6.0 kg at point ( 3.0, -4.0 )
Now, Moment of inertia 
of this system of masses about the y-axis will be;
Moment of inertia ₓ = mixi²
Moment of inertia = m₁x₁² + m₂x₂²
we substitute
Moment of inertia = [ 5.0 × ( 3 )² ] + [ 6.0 × ( 3 )² ]
Moment of inertia = [ 5.0 × 9 ] + [ 6.0 × 9 ]
Moment of inertia = 45 + 54
Moment of inertia = 99 kgm²
Therefore, the moment of inertia of this system of masses about the y-axis is 99 kgm²
