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3 years ago

What charges faster, an iPhone with charger plugged into a wall or a iPhone with charger plugged into a computer?

Physics

1 answer:

Savatey [412]3 years ago

3 0

The wall will be faster. If you charge using your computer, it is able to dedicate less power.

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Question 20

fenix001 [56]

Answer:

(b) Water

Explanation:

The density of the liquid is found by dividing its mass by its volume.

The mass of the liquid is the difference in mass between the full and empty graduated cylinder:

liquid mass = (145 g) -(45 g) = 100 g

<h3>volume</h3>

The cylinder is said to contain 100 mL of the liquid, so that is the volume of interest.

<h3>density</h3>

The ratio of mass to volume is the liquid's density:

ρ = (100 g)/(100 mL) = 1 g/mL

This density identifies the most likely liquid as water.

8 0

2 years ago

What kind of scientist investigation involve making observations

Ivahew [28]

When you study animals.

6 0

3 years ago

Read 2 more answers

Convert 318 meters per second to kilometers per hour

alexgriva [62]

Answer:

1144.8

Explanation:

1 meter per second is equal to 3.6 kilometers per hour

4 0

3 years ago

Read 2 more answers

Generation of electricity in coal-burning power plants and nuclear power plants both involve _______.

kolbaska11 [484]

Answer:

Heating water to produce steam which drives a turbine

Explanation:

Generation of electricity in coal-burning power plants and nuclear power plants both involve heating water to produce steam which drives a turbine.

5 0

3 years ago

An AC adapter for a telephone-answering unit uses a transformer to reduce the line voltage of 120 V (rms) to a voltage of 9.0 V.

Illusion [34]

Answer:

1. The number of turns on the secondary output is 18

2. The root mean square power delivered to the transformer is 48 Watts.

Explanation:

A transformer is an electronic device that can be used for increasing or decreasing the value of a given voltage. It consists of primary coils and secondary coil of a definte number of turns. When voltage flows in the primary coil, it induces voltage in the secondary coil. The two types are: step-up and step down transformers.

1. For a given transformer,

$\frac{V_{s} }{V_{p} }$ = $\frac{N_{s} }{N_{p} }$

where $V_{s}$ is the value of the induced voltage in the secondary coil, $V_{p}$ is he voltage in the primary coil, and $N_{s}$ is the number of turns of the secondary coil, $N_{p}$ is the number of turns in the primary coil.