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viktelen [127]
3 years ago
13

Which one of the following statements does not accurately describe vibrations?

Physics
1 answer:
Degger [83]3 years ago
8 0
Which one of the following statements does not accurately describe vibrations?
Answer: Force vibrations, such as those between a tuning fork and a large cabinet surface, results in a much lower sound than was produced by the original vibrating body.


It will help u.
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A steel wire, 3.2 m long, has a diameter of 1.2 mm. The wire stretches 1.6 mm when it bears a load. Young's modulus for steel is
Troyanec [42]

Answer:

The mass, m, of the load = 11.3 Kg

Explanation:

Young's Modulus = Stress / Strain

<em>Stress = Force / Area </em>

Force = mass,m * acceleration due to gravity,g  

assuming g = 10ms⁻²

therefore, Force = 10m

m is mass of the load in kilograms

Area of steel wire = π * r^2, where π= 3.14, r = 1.2/2 = 0.6mm or 6.0 * 10^-4m

= 3.14 * (6.0 * 10⁻⁴m)^2 = 1.13*10⁻⁶m²

<em>Stress = </em>10m / 1.13*10⁻⁶m²

<em> Strain = extension / original length</em>

= (new length - original length)/original length

= (3.2016 - 3.2000)/3.2000

Strain = 0.0005

Using Young's Modulus = Stress / Strain

Note: 1Pa = 1N/m² ; Young's modulus for steel is 2.0 × 10¹¹ Pa or N/m²

2.0*10¹¹ N/m²= Stress / Strain

2.0*10¹¹ = (10m / 1.13*10⁻⁶) / 0.0005

0.0005 * 2.0*10¹¹  = 10m/1.13*10⁻⁶

10m  = 1.13*10⁻⁶ * 0.0005*2*10¹¹

10m  = 113

m = 11.3 kg

Therefore, the mass, m, of the load = 11.3 Kg

8 0
3 years ago
How and why has the Atomic Theory changed over time
sveticcg [70]
In chemistry and physics, the atomic theory explains how our understanding of the atom has changed over time. Atoms were once thought to be the smallest pieces of matter. ... The first idea of the atom came from the Greek philosopher Democritus.

I hope this helps!
3 0
3 years ago
A 1.5 in diameter solid shaft is made of a steel alloy having an allowable shear stress of �allow = 12 ksi. a) Determine the max
Zarrin [17]

Answer: a) T= 7.95kip.in b) T'= 6.38kip.in c) a= 1°

Explanation:

a) ta = allowable shear stress= 12ksi

Using torsion formula

tm= ta= Tc/J tm = Maximum shear stress

12= T(0.75)/(π/2)(0.75^4). radius= d/2 = 1.5/2 = 0.75in

T= 12(π/2)(0.75^3)= 7.95kip.in

b) using torsion formula

tm= ta= T'c/J radius 2= d/2= 1.0/2 = 0.50in

12= T'(0.75)/(π/2)(0.75^4 - 0.5^4)

T'= 6.38 kpi.in

c) angle of twist = a = TL/JG L= 1ft= 12in

a = 6.38 × 12/(π/2)(0.75^4 -0.50^4)(11)(10^3)

a = 0.01745 rad = 1°

8 0
3 years ago
How long would light take to travel from one hill to another
zhuklara [117]

186282 miles. Hope it helps

7 0
3 years ago
I throw a football in the x direction with a fore of 124N. The football is 4 kilograms. The football accelerated for 5 seconds.
castortr0y [4]

31 (unit)

acceleration formula

                             net force (124)

     Acceleration = -------------

                                mass     (4)

124÷4=31

6 0
3 years ago
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