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4 years ago

Explain all the energy conversions that take place while using a cell phone.

Physics

1 answer:

zhuklara [117]4 years ago

8 0

Answer:

#See solution for details.

Explanation:

-Chemical energy in the battery is converted into Electrical Energy which powers up the phone.

-The electrical energy is then converted to Light Energy when the phone is powered up, this is seen through the lightening up of the phone screen.

-During phone calls, the electrical energy is further converted to Sound Energy to allow for transmission of audio signals.

- As we continue to use the phone, the electrical energy is converted into heat energy which we feel due to an overheating battery.

-The cycle then repeats itself again whenever a phone is charged.

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Which statement uses the terms velocity and acceleration correctly?

Pie

Answer:

i think is E

Explanation:

5 0

3 years ago

A room that has an average ambient sound pressure level of 62 dBA and a maximum sound pressure level lasting more than a minute

cupoosta [38]

Answer:

Explanation:

A fire alarm notification appliance is an active fire protection component of a fire alarm system. The primary function of the notification appliance is to alert persons at risk.

If want the audible public mode signal to be hear clearly then, we need to have a sound level that is at least 15dB above the average ambient sound level or 5dB above the maximum sound level of at least 1minute

In this case the,

The average ambient sound level is 62dB,

And the maximum sound level is 68dB

Then, the public mode signal should be at least

1. 62dB+ 15dB=77dB

2. 68dB +5dB =73dB.

Then the public mode signal hearing must be at least 77dB.

6 0

4 years ago

Two 75 W (120 V) lightbulbs are wired in series, then the combination is connected to a 120 V supply. Part A How much power is d

Elenna [48]

Answer:

300 W

Explanation:

power of each bulb P = 75 W

voltage in the circuit = 120 V

we know that electrical power P = IV ....1

and V = IR

we can also say that I = V/R

substituting for I in equation 1, we have

P = $V^{2}/R$ ....2

The total total power in the circuit = 75 x 2 = 150 W

from equation 2, we have

150 = $120^{2} /R$

R = $120^{2}/150$ = 96 Ω this is the resistance of the whole circuit.

This resistance is due to the two light bulbs, for each light bulb since they are arranged in series

R = 96/2 = 48 Ω

From P = $V^{2}/R$

for each light bulb, power is

P = $120^{2} /48$ = 300 W

8 0

3 years ago

Which does a reference point provide? Select two options. a position from which to measure future distance a set of standard uni

In-s [12.5K]

Answer:

hope this helps you :)

Explanation:

An object is in motion if its position changes relative to another object. To decide if you are moving, you can use your chair as a reference point. A reference point is a place or object used for comparison to determine if something is in motion.

4 0

4 years ago

Determine the electric field (in N/C) required to give the maximum possible deviation angle. (Enter the magnitude.)

Zigmanuir [339]

Answer:

Maximum angle = 3.43⁰

Explanation:

Say that you are given the following information:

vertical distance between the charge plate = 0.03 m

length of the plate = 0.5 m

velocity of the electrons = 5 × 10⁶ ms⁻¹

the maximum angle is given by the formula: