All categories

3 years ago

4

Physics

1 answer:

Svetlanka [38]3 years ago

6 0

Answer:

Speed of wave = 2.5 m/s

Explanation:

Given:

Time taken by wave = 6 second

Height (Distance) of wave = 15 meter

Find:

Speed of wave

Computation:

⇒ Speed = Distance / Time taken

⇒ Speed of wave = Height (Distance) of wave / Time taken by wave

⇒ Speed of wave = 15 / 6

Speed of wave = 2.5 m/s

You might be interested in

there is a fish called an archer fish that shoots drops of water at insects resting on branches above the water. If the Archer f

Mariulka [41]

Answer:

=3.5 m/s

Explanation:

y = x tanθ - 1/2 g x² / (u²cos²θ )

y = 0.25 , x = 0.5, θ = 40°

.25 = .50 tan40 - .5 x 9.8x x²/ u²cos²40

.25 = .42 - 2.0875/u²

u = 3.5 m / s.

4 0

3 years ago

if researchers hit a sheet of metal with a yellow light and nothing happens, what color should the try next?

Nataliya [291]

The photoelectric emission is possible if the wavelength of the incident light is less than that of yellow light

3 0

3 years ago

A moving body has energy due to its motion. This energy is called

fgiga [73]

Answer:

kinetic energy is the answer

Explanation:

kinetic energy is movement

4 0

3 years ago

Sound travels fastest in _____.

Irina-Kira [14]

Sound travels fastest in solids,than liquids, and faster in liquids, than in gases.

6 0

2 years ago

Read 2 more answers

A 2.66 kg, 22.25 cm diameter turntable rotates at 238 rpm on frictionless bearings. Two 420 g blocks fall from above, hit the tu

Phantasy [73]

Answer:

The value is $w_f = 146 \ rpm$

Explanation:

From the question we are told that

The mass is $m = 2.66 \ kg$

The diameter is $d = 22.25 \ cm = 0.2225 \ m$

The angular speed is $w_i = 238 \ rpm$

The mass of each of the blocks is $m_b = 420 \ g = 0.420 \ kg$

Generally the radius of the turntable is mathematically represented as

$r = \frac{d}{2}$

=> $r = \frac{0.2225}{2}$

=> $r = 0.11125$

The moment of inertia of the turntable before the blocks fell is mathematically represented as

$I_{i} = \frac{1}{2} * m * r^2$

=> $I_{i} = \frac{1}{2} * 2.66 * (0.11125)^2$

=> $I_{i} = 0.01646 \ kg\cdot m^2$

The moment of inertia of the turntable after the blocks fell is mathematically represented as

$I_{f} = \frac{1}{2} * m * r^2 + 2 m_b * r^2$

=> $I_{f} = \frac{1}{2} * 2.66 * (0.11125)^2 + 2 * 0.420 * 0.11125^2$

=> $I_{f} = 0.02686 \ kg\cdot m^2$

Generally from the law of angular momentum conservation

$L_i = L_f$

Here $L_i$ is the initial angular momentum of the turntable before the blocks fell which is mathematically represented as

$L_i = I_i * w_i$

and $L_f$ is the initial angular momentum of the turntable after the blocks fell which is mathematically represented as

$L_i = I_f * w_f$

$0.01646* 238 = 0.02686 * w_f$

=> $w_f = 146 \ rpm$

5 0

2 years ago