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4 years ago

The speed of sound in water is about 1.5 x 10³ m/s. What is the speed of sound in water in km/h?

Physics

1 answer:

Vikentia [17]4 years ago

7 0

Answer:

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Explanation:

### A time of high unemployment and falling prices.

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A convex lens of focal length 25 cm is in contact with a concave lens of focal length 50 cm. The equivalent focal length of this

Gwar [14]

The equivalent focal length of this combination-lenses should be +50 cm.

Given:

Focal length of convex lens, f₁ = +25 cm

Focal length of concave lens, f₂ = -50 cm

Calculation:

We know that the power of a lens is given as:

P = 1 / f

where, f is the focal length of lens

Now, the power of convex lens can be calculated as:

P₁ = 1/f₁

= 1/(25×10⁻² m)

= 100/25

= +4 D

Similarly, the power of concave lens can be calculated as:

P₂ = 1/f₂

= (1/-50×10⁻² m)

= -100/50

= -2 D

Thus, the power of the combined lenses can be calculated as:

P₍₁₊₂₎ = P₁ + P₂

= +4 D - 2 D

= +2 D

Now, the combined focal length of the lens can be calculated as:

f₍₁₊₂₎ = 1 / P₍₁₊₂₎

= 100 / 2 D

= +50 cm

Therefore, the equivalent focal length of this combination-lenses will be +50 cm.

Learn more about mirrors and lenses here:

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6 0

2 years ago

Please hurry please

Ghella [55]

Answer:

0.765m

Explanation:

gravitational potential energy GPE = mass * acceleration due to gravity * height

Given

GPE = 30Joules

Mass m = 4kg

acceleration = 9.8m/s²

Required

Height h

From the formula

h = GPE/mg

h = 30/4(9.8)

h = 30/39.2

h = 0.765m\

Hence the height of the counter is 0.765m

4 0

3 years ago

An object falling from a great height in Earth's atmosphere eventually reaches a speed called Terminal velocity. What cause a fa

Julli [10]

Answer:

Explanation:

If its at a height the Gratitude of it falling down with only Gravity if Any other Forces are acting on it so as Friction But Sideways.

5 0

3 years ago

Find the equilibrant of two 10.0-N forces acting upon a body when the angle between the forces is 90° Solve graphically using a

bazaltina [42]

The equilibrant force of the two given forces is 14.14 N.

<h3 /><h3 /><h3>What is equilibrant force?</h3>

This is a single force that balances other given forces.

The given parameters:

First force, F₁ = 10 N
Second force, F₂ = 10 N
Angle between the forces, θ = 90⁰

The equilibrant force of the two given forces is calculated as follows;

$F = \sqrt{F_1 ^2 + F_2 ^2} \\\\F = \sqrt{(10)^2 + (10)^2} \\\\F = 14.14 \ N$

Thus, the equilibrant force of the two given forces is 14.14 N.

Learn more about equilibrant force here: brainly.com/question/8045102

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3 years ago

A tuning fork with a frequency of 675 Hz resonates in an air column when the length of the tube is 17.0 cm and again when the le

maria [59]

Answer:

Explanation:

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3 years ago

The speed of sound in water is about 1.5 x 10³ m/s. What is the speed of sound in water in km/h?​

The speed of sound in water is about 1.5 x 10³ m/s. What is the speed of sound in water in km/h?