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3 years ago

A sound wave generated by a musical note has the characteristics presented

Physics

2 answers:

Anuta_ua [19.1K]3 years ago

6 0

Answer:

Explanation:subtract all of those by the all of the other numbers and that’s the answer i think that’s the way I learned it

dlinn [17]3 years ago

4 0

Answer: its B 6.3

Explanation:

AP3X

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A mass of 100 g stretches a spring 5 cm. If the mass is set in motion from its equilibrium position with a downward velocity of

garri49 [273]

Answer:

$w_{0}=14$

$t=\frac{\pi }{14}$

Explanation:

Data

mass m= 100g

Length L= 5cm

we can use:

gm-kL= 0

divide both side by m

g - $\frac{kL}{m}$ =0

where

$\frac{k}{m}$ = $\frac{g}{L}$

$\frac{k}{m}=w_{0}$ ^{2}

so now

$w_{0}^{2}$ = $\frac{9.8*100}{5}$

$w_{0}^{2}=\frac{980}{5}$

$w_{0}^{2}=196$

square both side

$w_{0}=\sqrt{196}$

$w_{0}=14$

We can apply:

u(t)=Acoswt +Bsinwt

u(t)=Acos14t +Bsin14t

u(0)=0 where A=0

therefore

u(0) = Bsin14t

$u^{'}$ (0) = 10 ⇒ 10=14B ⇒ B= $\frac{14}{10}$ B= $\frac{5}{7}$

so now u(t)= $\frac{5}{7}$ sin14t

so t will be:

t= $\frac{\pi }{14}$

t= $\frac{3.14}{14}$

t=0.22 seconds

8 0

3 years ago

A 1.30-kg object is held 1.10 m above a relaxed, massless vertical spring with a force constant of 315 N/m. The object is droppe

pshichka [43]

Answer:

0.345m

Explanation:

Let x (m) be the length that the spring is compress. If we take the point where the spring is compressed as a reference point, then the distance from that point to point where the ball is held is x + 1.1 m.

And so the potential energy of the object at the held point is:

$E_p = mgh$

where m = 1.3 kg is the object mass, g = 10m/s2 is the gravitational acceleration and h = x + 1.1 m is the height of the object with respect to the reference point

$E_p = 1.3 * 10 * (x + 1.1) = 13(x + 1.1) = 13x + 14.3 J$

According to the conservation law of energy, this potential energy is converted to spring elastic energy once it's compressed

$E_p = E_k = kx^2/2 = 13x + 14.3$

where k = 315 is the spring constant and x is the compressed length

$315x^2 = 26x + 28.6$

$315x^2 - 26x - 28.6 = 0$

$x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}$

$x = \frac{26 \pm \sqrt{26^2 - 4*(-28.6)*315}}{2*315}$

$x = \frac{26 \pm 191.6}{630}$

x = 0.345 m or x = -0.263 m

Since x can only be positive we will pick the 0.345m

6 0

3 years ago

The existence of coal beds in Antarctica indicates that the continent once was____.

tia_tia [17]

Answer:

A temperate, rainy climate

Explanation:

The existence of coal beds in Antarctica indicates that the continent once was a temperate, rainy climate.

4 0

3 years ago

Read 2 more answers

A truck starts from rest with an acceleration of 0.3 m/ S^2 find its speed in km/h when it has moves through 150 m

Nadya [2.5K]

Answer:

9.5 m/s

Explanation:

Distance, S = 150m

Acceleration, a = 0.3 m/s^2

Initial velocity, u = 0 m/s

Final velocity, v

Use kinematics equation

v^2 - u^2 = 2aS

v^2 - 0 = 2*0.3*150 = 90

v = sqrt(90) = 9.49 m/s

3 0

3 years ago

Read 2 more answers

Which motion is best explained as forces acting according to Newton's third law of motion?

marta [7]

D. A rocket pushes gases backward while the gases push the rocket forward

Newton’s third law: for every action there is and equal and opposite reaction

8 0

3 years ago