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pickupchik [31]
1 year ago
8

An aluminum block of mass 12.00 kg is heated from 20 c to 118 c. if the specific heat of aluminum is 913 j-1 kg k-1 then how muc

h energy is required?
Physics
1 answer:
Jobisdone [24]1 year ago
6 0

Answer:

107 kJ

Explanation:

12.00 kg * 913 J /kg-C * (118-20)°C        ( I corrected spec heat units)

                    ( a  C degree change is the same as a kelvin change)

                   = 1 073 688 J   = 107 kJ   ( three sig digits)

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What does the geology of the two continents indicate about past events in Earth history?
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Answer:

Explanation:

Rocks tell us a great deal about the Earth's history. Igneous rocks tell of past volcanic episodes and can also be used to age-date certain periods in the past. Sedimentary rocks often record past depositional environments (e.g deep ocean, shallow shelf, fluvial) and usually contain the most fossils from past ages.

6 0
3 years ago
Which statement describes the magnetic field inside a bar magnet? It points from north to south. It points from south to north.
Levart [38]

Inside the bar magnet, the magnetic field points from north to south. Statement A is correct.

Magnetic Field:

It is defined as a vector field or the influence of the magnet on the electric current, charges and ferromagnetic substance.

The strength of magnetic field is depends up on the numbers of magnetic field lines per unit area.

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Therefore, inside the bar magnet, the magnetic field points from north to south.

To know more about Magnetic Field:

brainly.com/question/19542022

4 0
2 years ago
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What is a an reason why a object gets extinct
adoni [48]

Answer:

An object may become extinct due to the lack of quantity of the object and the object no longer exists so it is now extinct.

7 0
3 years ago
An airplane traveling at one third the speed of sound (i.e., 114 m/s) emits a sound of frequency 3.72 kHz. At what frequency doe
nlexa [21]

Answer:

f'=5.58kHz

Explanation:

This is an example of the Doppler effect, the formula is:

f'=\frac{(v+v_o)}{(v+v_s)}f

Where f is the actual frequency, f' is the observed frequency, v is the velocity of the sound waves, v_o the velocity of the observer (which is negative if the observer is moving away from the source)  and v_s the velocity of the source  (which is negative if is moving towards the observer). For this problem:

f=3.72kHz\\v=342m/s\\v_o=0m/s\\v_s=-114m/s

f'=\frac{(342+0)}{(342-114)}3.72\times10^3\\f'=\frac{342}{228}3.72\times10^3\\f'=(1.5)3.72\times10^3\\f'=5580Hz=5.58kHz

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2 years ago
A procedure called______is used to find the volume of a rock
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Displacement is usually how the messure the rock

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