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3 years ago

Example sentence for gravitational potential energy

Physics

1 answer:

andreev551 [17]3 years ago

5 0

Answer:

Explanation:

An object falling loses gravitational potential energy and gains kinetic energy. The gravity potential is the gravitational potential energy per unit mass. This energy comes from the gravitational potential energy released when the water falls. ... At 0, all the energy is in gravitational potential energy.

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Architects have to consider how sound travels when designing large buildings such as theaters, auditoriums, or museums. Sound in

serious [3.7K]

Answer:

I₂ = 0.04 W / m²

Explanation:

Sound intensity is the power emitted between the unit area

I = W / A

W = I A

sound is a wave that travels in space whereby its energy is distributed on the surface of a sphere

A = 4π r²

we substitute

W = I (4π r²)

the emission power is constant, so the intensity at two different points is

W = I₁ 4π r₁² = I₂ 4π r₂²

so the equation is

I₁ r₁² = I₂ r₂²

In this case the units are not shown in the exercise, suppose that all units are in the SI system

I₂ = $I_1 \ \frac{r_1^2}{r_2^2}$

let's calculate

I₂ = 4 $4 \ \frac{2^2}{20^2}$

I₂ = 0.04 W / m²

5 0

2 years ago

An air-filled parallel-plate capacitor is constructed with a plate area of 0.40 m2 and a plate separation of 0.10 mm. It is then

seropon [69]

Answer:

The charge stored is $Q = 4.25 *10^{-7 } \ C$

The energy stored is $E = 2.55*10^{-6} \ J$

Explanation:

From the question we are told that

The area of the plates is $A = 0.40 \ m^2$

The separation between the plate is $d = 0.10 \ mm =0.0001 \ m$

The potential difference is $V = 12 \ V$

The permitivity of free space is $\epsilon_o = 8.85 *10^{-12} C^2 \cdot N^{-1} \cdot m^2$

The dielectric constant of glass is K = 5.0

Generally the capacitance of this capacitor is

$C = \frac{\epsilon_o * A}{d}$

substituting values

$C = \frac{8.85*10^{-12} * 0.40}{0.0001}$

$C = 3.34 *10^{-8} \ C$

The charge stored is mathematically evaluated as

$Q = CV$

substituting values

$Q = (3.54*10^{-8} * 12)$

$Q = 4.25 *10^{-7 } \ C$

The energy stored is

$E = 0.5 * CV^2$

substituting values

$E = 0.5 * (4.25 *10^{-7} * 12^2)$

$E = 2.55*10^{-6} \ J$

7 0

3 years ago

A circuit is built based on the circuit diagram shown.

goldfiish [28.3K]

I think the answer is B

4 0

3 years ago

A 9.0 cm object is 3.0 cm from a lens, which has a focal length of –12.0 cm.

artcher [175]

The answers are -2.4 for the distance. 7.2 for the height. Concave for the type

7 0

2 years ago

Read 2 more answers

A satellite is in orbit 36000km above the surface of the earth. Its angular velocity is 7.27*10^-5 rad/s. What is the velocity o

bagirrra123 [75]

Answer:

v = 3.08 km/s

Explanation:

Given that,

The angular velocity of the satellite = $\omega=7.27\times 10^{-5} rad/s$

A satellite is in orbit 36000km above the surface of the earth.

The radius of the earth is 6400 km

Let v is the velocity of the satellite. It can be calculated as :

$v=r\omega\\\\v=(36000\times 10^3+6400\times 10^3)\times 7.27\times 10^{-5}\\\\v=3082.48\ m/s\\\\v=3.08\ km/s$

So, the velocity of the satellite is 3.08 km/s.

6 0

2 years ago