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Natali5045456 [20]
3 years ago
15

Please help! Don't have much time! What energy transformation occurs when a car stereo is turned on? Select one: a. Chemical to

electrical to sound b. Chemical to sound to electrical c. Electrical to sound to chemical d. Electrical to chemical to sound
Physics
1 answer:
r-ruslan [8.4K]3 years ago
6 0
A is correct.

When the car stereo is turned on, the chemical energy from the battery is transformed to electrical energy to make the stereo on, then the energy is transformed to sound so you can year it.
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I AN TIMED, HURRY!!
kramer

Answer:

C)0.59 N

Explanation:

By the Achemides principle we know that the buoyancy force on an object which is immersed in a incompressible fluid at rest is equal to the weight of the fluid displaced. So all we have to do is to find the mass of 60ml.

Density = mass / volume

Mass = density × volume

= 1 g/cm³× 60 cm³

{ as 1ml=1cm³}

= 60 g

So force equals to,

Force = weight = mass × gravitational acceleration

= 0.06×9.8 = 0.59 N

6 0
4 years ago
Read 2 more answers
A 148 g ball is dropped from a tree 11.0 m above the ground. With what speed would it hit the ground
forsale [732]

Answer:

14.68m/s

Explanation:

As per the question, the data provided is as follows

Mass = M = 0.148 kg

Height = h = 11 m

Initial velocity = U = 0 m/s

Final velocity = V

Gravitational force = F

Mass = M

Based on the above information, the speed that hit to the ground is

As we know that

Work to be done = Change in kinetic energy

F ( S) = (\frac{1}{2} ) M ( V^2 - U^2 )

M g h = (\frac{1}{2} ) M ( V^2 - U^2 )

g h = (\frac{1}{2} ) ( V^2 - U^2 )

V^2 - U^2 = 2gh

V^2 - 0 = 2gh

V = \sqrt{2 g h}

= \sqrt{2\times9.8\times11}

= 14.68m/s

7 0
3 years ago
The amplitude of an electric field is 0.4 v/m 23 km from a radio transmitter. What is the total power emitted by the transmitter
ycow [4]

To solve this problem we will apply the concepts related to the relationship between the voltage, the electric field and the distance, once the voltage is found we will use the definition of power, which is defined as the square of the voltage over the resistance. This is,

V=Ed

E = Electric field

d= Distance between the points

Replacing,

V=0.4*23000

V=9200 V

Now applying the relation for power we have,

P=\frac{V^2}{R}

Here

V = Voltage

R = Resistance

Replacing,

P= \frac{9200^2}{377}

P=224509.3 W

Therefore the total power emmited by the transmitter is 224509.3 W

4 0
3 years ago
A scientific theory _______.
Nesterboy [21]
B. is not a validated bu experimentation

5 0
3 years ago
Read 2 more answers
7 One lb of Refrigerant 134a contained within a piston–cylinder assembly undergoes a process from a state where the temperature
julsineya [31]

Answer:

\Delta S = S_2-S_1 = 0.08835 \frac {BTU} {Lb ^ {\circ} R}

Explanation:

A) In order to solve the table it is necessary to consult tables A11-E and A10E for refrigerant R134-a

In this way we obtain that:

S_1 = S_f = 0.0648 \frac {BTU} {Lb. ^ {\circ} R}

In this way,

S_2 = S_f + x_2 (S_g-S_f) = 0.0902 + 0.5 (0.2161-0.0902)

S_2 = 0.15315 \frac {BTU} {Lb ^ {\circ} R}

In this way the entropy change is,

\Delta S = S_2-S_1 = 0.08835 \frac {BTU} {Lb. ^ {\°} R}

B) Whenever entropy yields a positive result, the process can be carried out adiabatically.

7 0
3 years ago
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