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3 years ago

How much thermal energy is put out by the speaker?

Physics

2 answers:

suter [353]3 years ago

5 0

15 ? just a guess. :)

SIZIF [17.4K]3 years ago

5 0

Answer:

Thermal energy = 15 Joules

Explanation:

From the attached figure it is given that a loudspeaker converts electrical energy into the kinetic energy of the speaker.

Electrical energy of the speaker is 100 J. The electrical energy is converted to Sound energy of 80 J, friction energy of 5 J and thermal energy. We have to find the thermal energy is put out by the speaker. According to law of conservation of energy :

EE = SE+ TE+ f

Where

EE is the electrical energy

SE is the sound energy

TE is thermal energy

f is friction

100 J = 80 J+ TE + 5 J

So, TE = 15 J

So, the thermal energy of 15 J is put out of the speaker. Hence, the correct option is (b) " 15 Joules ".

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stepladder [879]

T=0-15.5/-0.392
=39.5m/s

8 0

4 years ago

Read 2 more answers

Un tractor halando un carretón cargado con caña de azucar, viaja por el camino recto de una finca a una velocidad de 20 km/h. Si

Sidana [21]

Translation

A tractor pulling a cart loaded with sugar cane travels down the straight path of a farm at a speed of 20 km / h. If at 3:00 p.m.you pass the Finca Las Margaritas, what time will you arrive at the Las Ilusiones farm, located on the same road, if the distance between the two farms is 60 km

Answer:

6.00 pm

Explanation:

Speed is given by dividing distance by time and expressed as s=d/t. Making time the subject of the formula then t=d/s where s is the speed, d is distance covered and t is the time taken. Substituting 20 km/h for s and 60 km for d then t=60/20=3 hours

Adding 3 hours to 3 pm we get 6pm

Therefore, the time to reach the destination if the speed is constantly maintained is 6.00 pm

4 0

3 years ago

A typical ten-pound car wheel has a moment of inertia of about 0.35kg⋅m2. The wheel rotates about the axle at a constant angular

QveST [7]

Answer:

The rotational kinetic energy of the rotating wheel is 529.09 J

Explanation:

Given;

moment of inertia I = 0.35kg⋅m²

number of revolutions = 35.0

time of revolution, t = 4.00 s

Angular speed (in revolution per second), ω = 35/4 = 8.75 rev/s

Angular speed (in radian per second), ω = 8.75 rev/s x 2π = 54.985 rad/s

Rotational kinetic energy, K = ¹/₂Iω²

Rotational kinetic energy, K = ¹/₂ x 0.35 x (54.985)²

Rotational kinetic energy, K = 529.09 J

Therefore, the rotational kinetic energy of the rotating wheel is 529.09 J

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3 years ago

When a constant force acts upon an object, the acceleration of the object varies inversely with its mass. When a certain constan

soldi70 [24.7K]

25 m/s² is the object's acceleration

m1a1=m2a2

m1=5kg

m2=3 kg

a1= 15 m/s²

a2=?

m1a1=m2a2

a2=m1a1/m2

a2=5×15÷3

a2= 25 m/s²

Acceleration is a vector variable that describes the rate at which an object changes its velocity.

An object is said to be accelerating if its velocity is changing. Occasionally, a moving object can change its velocity by the same amount each second. a moving object whose speed fluctuates by 10 m/s every second. This is referred to as a constant acceleration since the velocity is changing by a fixed amount each second.

The difference between an object with a constant acceleration and one with a constant velocity must be understood. Do not be fooled! If an object's velocity changes, whether it does so by a constant amount or a variable amount, then it is accelerating. Furthermore, something that is travelling at a steady speed is not accelerating.

To know more about acceleration visit : brainly.com/question/3046924

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8 0

1 year ago

Can someone say for me ost right or wrong if it wrong say for me what is the answer plrase

saveliy_v [14]

Answer:

It is correct

Explanation:

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3 years ago