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7nadin3 [17]
3 years ago
12

(answer fast and correctly and i will give you brainiest and 5 star's. )

Physics
2 answers:
oee [108]3 years ago
7 0

Answer:

Energy cannot be created or destroyed.

Explanation:

its in the name, law of "conservation" of energy. energy can only change forms not be destroyed

sattari [20]3 years ago
5 0

Answer: Energy cannot be created or destroyed.

Explanation: The law of conservation of energy states that energy can neither be created nor be destroyed due to energy loss. It can only change its states from one energy state to another.

The efficiency is defined as the ratio of output work to the input work. The efficiency of the fan is not 100%. Because some of the energy is lost in the form of heat and sound. No machine is 100% efficient. There is always some loss of energy takes place.

I really hope this helps and sorry it's late.

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Who could explain the phenomenom of interference of light?​
Likurg_2 [28]

Answer:

When the waves reflected from the inner and outer surface combine they will interfere with each other, removing or reinforcing some parts of white light by destructive or constructive interference. ... This results in color.

Explanation:

this is what we studied

so basically  there is like a surface

and 2 different waves coming out of the same source

they will combine and start removing parts of the white light (which originally consists of 6 to 7 colors)

results in showing these colors

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When an ice pack is applied to an injury, thermal energy from the injured area transfers to the ice, causing the blood vessels w
Shkiper50 [21]
It is conduction I believe
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A girl pushes on a table with a 5-newton force directed to the east. Her friend pushes on the same table with a 10- newton force
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Think like this: 10 is twice as much as 5.

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3 years ago
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Look at the circuit diagram. <br><br> What type of circuit is shown?
Nimfa-mama [501]

Answer:

Its a parallel connection

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The bulbs aren't in one line but two different parts, which makes it a parallel connection instead of a series connection.

7 0
4 years ago
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A heavy piece of hanging sculpture is suspended by a 90 cm-long, 5.0 g steel wire. When the wind blows hard, the wire hums at it
kupik [55]

Answer: The mass of the sculpture is 11.8kg

Explanation:

Using the equation of fundamental frequency of a taut string.

f = (1/2L)*√(T/μ) .... (Eqn1)

Where

f= frequency in Hertz =80Hz

T = Tension in the string = Mg

M represent the mass of the substance (sculpture) =?

g= 9.8m/s^2

L= Length of the string=90cm=0.9m

μ= mass density = mass of string /Length of string

mass of string =5g=0.005kg

L=0.9m

μ=0.005/0.9 = 0.0056kg/m

Using (Eqn1)

80= 1/(2*0.9) √(T/0.0056)

144= √(T/0.0056)

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20736= T/0.0056

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M= 11.8kg

Therefore the mass of the sculpture is 11.8kg

4 0
4 years ago
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