All categories

2 years ago

A mobile phone is 35% efficient. Over half an hour 11 kJ of energy is transferred to the phone.

Physics

1 answer:

kramer2 years ago

6 0

Energy Transferre=11KJ
Efficiency=35%

<h3>☆Usefully transferred energy:-</h3>

$\\ \sf\longmapsto 35\%\:of 11$

$\\ \sf\longmapsto 35\%\times 11$

$\\ \sf\longmapsto \dfrac{35}{100}\times 11$

$\\ \sf\longmapsto \dfrac{385}{100}$

$\\ \sf\longmapsto 3.85KJ$

$\\ \sf\longmapsto 3850J$

You might be interested in

The position of an object is given by x = at3 - bt2 + ct,where a = 4.1 m/s3, b = 2.2 m/s2, c = 1.7 m/s, and x and t are in SI un

Elza [17]

Answer:

The answer to your question is: 15 m/s2

Explanation:

Equation x = at3 - bt2 + ct

a = 4.1 m/s3

b = 2.2 m/s2

c = 1.7 m/s

First we find x at t = 4.1 s

x = 4.1(4.1)3 - 2.2(4.1)2 + 1.7(4.1)

x = 4.1(68.921) - 2.2(16.81) + 6.97

x = 282.58 - 36.98 + 6.98

x = 252.58 m

Now we find speed

v = x/t = 252.58/ 4.1 = 61.6 m/s

Finally

acceleration = v/t = 61.6/4.1 = 15 m/s2

6 0

3 years ago

Brain surgery. Surgeons can remove brain tumors by using a cavitron ultrasonic surgical aspirator, which produces sound waves of

dmitriy555 [2]

Answer: $\lambda =1.304\times 10^4\ m$

Explanation:

Given

frequency of wave $\nu =23\ kHz$

We know velocity is given by

$v=\nu \times \lambda$

where $\lambda$ =wavelength

$\lambda =\frac{velocity}{\nu }$

$\lambda =\frac{3\times 10^8}{23\times 10^3}$

$\lambda =1.304\times 10^4\ m$

7 0

3 years ago

A stray dog was taken to a veterinarian. What cell organelle would help the veterinarian determine the breed of the dog?

Feliz [49]

Answer:

chloroplast will help determine the breed of dog

7 0

3 years ago

Read 2 more answers

The force that generates the heat and light produced by the sun and other stars is 1. the electromagnetic force. 2. the weak for

Jet001 [13]

Answer: Gravitational force

Explanation:

The sun is known as a star in the centre of the solar system. It is the most important source of energy for life on earth. It is also known as a yellow dwarf star with gravity that holds the solar system together in its orbit. Our seasons, ocean current, weather, climate and radiation belts are motivated by the interaction between the sun and earth. The sun is made up of 91% hydrogen and 8.1% helium by atoms, 70.6%hydrogen and 27.4% helium by mass.

The sun and other stars masses are held by Gravitational force attraction that accounts for the great heat and light they generate.

Gravitational force is the force by which planets or other body draws objects toward its center. The gravitational force of the sun keep the earth in orbit around which enables the great heat and light generated by the sun. This also applies to other stars.

3 0

3 years ago

PLEASE HELP QUICK GIVING AWAY 74 POINTS

kramer

Mercury, Venus, Earth, Mars. Terrestrial, rocky : 11

The spinning of a planet on its axis, causing day and night :9

A force of attraction that keeps planets orbiting the sun : 7

A group of objects that orbit a star : 8

The orbit of a planet around the sun. On Earth, one year : 10

The idea of that the Earth and planets orbit the sun. A sun-centered view : 6

A rock that has entered Earth's atmosphere, leaving a streak of light in the night sky : 13

Jupiter, Saturn, Uranus, Neptune. Gas giants : 12

The theory the universe came forth from a single spot in an enormous explosion: 1

Huge clusters of stars, gas, and dust bound by the force of gravity: 8

<h3>What is Galaxy?</h3>

The group of many stars along with interstellar gases, rocks and dust material.

Thus, the numbers are added in front of the sentences.

Learn more about galaxy.

brainly.com/question/24836631

#SPJ1

5 0

1 year ago