All categories

3 years ago

What energy is the candle giving off

Physics

1 answer:

gregori [183]3 years ago

5 0

The candle is giving off light
Chemical energy from the candle is converted to thermal energy

You might be interested in

Two loudspeakers in a plane are 2.0 m apart and in phase with each other. Both emit 700 Hz sound waves into a room where the spe

GuDViN [60]

Answer:

interference is between destructive and constructive

Explanation:

The interference of two sound waves periodicity in phase by the speakers is

Δr = $\frac{\phi }{2\pi } \ \lambda$

in this case they indicate that the frequency is f = 700 Hz, the wave speed is

v =λ f

λ = v / f

λ = 341/700

λ = 0.487 m

Let's use the Pythagorean theorem to find the distance that each wave travels

r₁ = $\sqrt{x^2 + y^2}$

let's measure the distance from speaker 1

r₁ = $\sqrt{5^2 + 1^2}$

r₁ = 5,099 m

the distance from the second speaker

r₂ = \sqrt{x^2 + y^2}

r₂ = $\sqrt{5^2 +3^2}$

r₂= 5.831 m

the difference in the way is

Δr = r₂ -r₁

Δr = 5,831 - 5,099

Δr = 0.732 m

$\frac{ \phi }{2\pi }$ = Δr /λ

\frac{ \phi }{2\pi } = 0.732 / 0.487

\frac{ \phi }{2\pi } = 1.50

this is the phase difference this phase difference is approximately

Ф= $\frac{\pi }{2}$ =1.57,

so the interference is between destructive ( Ф = π) and constructive (Ф=2π)

7 0

3 years ago

Properties that could be used in developing a temperature scale?<br>

satela [25.4K]

Answer:

Explanation:

Y=Kx

8 0

2 years ago

Read 2 more answers

. 1. When work is done and a force is transferred which choice describes the movement of the object? (Points : 3). . a) When wor

MissTica

I think that when work is done and a force istransferred an object must move in the direction of the force.

6 0

3 years ago

Read 2 more answers

A tennis ball is hit straight up at 20 m/s from the edge of a sheer cliff. Some time later, the ball passes the original height

Tatiana [17]

Answer:

a) 20 m/s

b) 5.83 seconds

c) 90.78 m

Explanation:

t = Time taken

u = Initial velocity = 20 m/s

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.81 m/s²

$v=u+at\\\Rightarrow 0=20-9.81\times t\\\Rightarrow \frac{-20}{-9.81}=t\\\Rightarrow t=2.04\ s$

Time taken to reach maximum height is 1.22 seconds

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=20\times 2.04+\frac{1}{2}\times -9.81\times 2.04^2\\\Rightarrow s=20.39\ m$

So, the stone would travel 20.39 m up

s = 20.39 m

$v^2-u^2=2as\\\Rightarrow v^2=2as+u^2\\\Rightarrow v^2=2\times 9.81\times 20.39+0^2\\\Rightarrow u=\sqrt{2\times 9.81\times 20.39}\\\Rightarrow u=20\ m/s$

The ball is moving a 20 m/s at the time the ball passes the original height from which it was hit

b) Total height stone would fall is 20.39+50 = 70.39 m

$s=ut+\frac{1}{2}at^2\\\Rightarrow 70.39=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{70.39\times 2}{9.81}}\\\Rightarrow t=3.79\ s$

Time taken by the ball to travel 70.39 m is 3.79 seconds

Total time taken by the ball to reach the ground from the time it left the person's hand is 2.04+3.79 = 5.83 seconds.

c) The ball travelled a distance of 20.39+50+20.39 = 90.78 m

4 0

3 years ago

500 J of heat is added to the gas in an isothermal process. As the gas expands, pushing against the piston, how much work does i

Levart [38]

Answer:

500 J

Explanation:

The isothermal process is the process in which the temperature is constant in the entire process.

As we know that the change in internal energy is the function of change in temperature. here temperature is constant so there in no change in internal energy.

So, By the First law of thermodynamics

ΔQ = ΔU + ΔW

Here, ΔQ is heat added and ΔU be the change in internal energy and ΔW be the work done

Here, ΔU = 0

So, ΔW = ΔQ = 500 J

So, the work done is 500 J.

7 0

3 years ago