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3 years ago

How does the law of conversation of energy apply to machines

2 answers:

4 0

energy transferred to a machine equals energy transferred from it. It is because according to conservation of energy we can't create or destroy energy so, energy remains constant however, their form can be change by machine's. hope i helped

trasher [3.6K]3 years ago

4 0

Answer:

Energy can neither be created nor destroyed but can be transformed from one form to another in a machine with loss in energy in form of heat.

For example, in a machine (mircowave), electrical energy which is a form of energy is transferred to the machine to create thermal energy to warm or defrost food, during this process, energy is converted but not created. The total energy given to the machine is equal to the energy given out by the machine plus energy loss in form of heat.

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Consider a cube with one corner at the origin and with sides of length 50 cm positioned along the x y z axes. There is an electr

lara [203]

Answer:

Charge in the cube = Q = (2.323 × 10⁻¹⁰) C

Explanation:

E → = < 45, 210 y , 0 > N/C

The length of the cube = 50 cm = 0.8 m

To find the charge in the cube, we need the net flux in the cube

In the z-direction, the electric field is 0, no, net flux in that direction,

In the x-direction, the electric field is constant, the same flux thay enters the face at x = 0 is the same that leaves at x= 0

50 cm, hence, no net flux in that direction too.

But the y direction, the electric field changes according to 210y from y = 0 to y = 0.50 m.

At y = 0, electric field = 210(0) = 0 N/C

At y = 0.50, electric field = 210(0.5) = 105 N/C.

Electric flux = Φ = E A = 105 (0.5 × 0.5) = 26.25 Vm or N/m²C

(the area of the xz plane that the field in this direction passes through is indeed 0.5²)

But according to Gauss' law, the net flux in a box is given by

Φ = Q/ε₀

where Q = charge in the box = ?

ε₀ = (8.85 × 10⁻¹²) C²N·m².

Q = Φε₀ = 26.25 × 8.85 × 10⁻¹²

Q = (2.323 × 10⁻¹⁰) C

Hope this Helps!!!

4 0

4 years ago

During meiosis maternal and paternal chromosomes that occur in a gamete line up and exchange segments in a process called crossi

sergiy2304 [10]

Explanation:

Crossing over is the swapping of genetic material that occurs in the germ line. During the formation of egg and sperm cells, also known as meiosis, paired chromosomes from each parent align so that similar DNA sequences from the paired chromosomes cross over one another.

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3 years ago

Read 2 more answers

An object is attached to a vertical spring and bobs up and down between points A and B. Where is the object located when its kin

gtnhenbr [62]

Answer:

a. at either A or B

Explanation:

Kinetic energy may be defined as the energy of the system or an object which is due to its velocity of the object it possess.

In the context, an object having mass is attached to spring which is vertical and the object moves up and down due to spring effect between points A and B. Now these points A and B are the extreme points after which the object bounces back.

At point A and B, the velocity of the object becomes zero and hence the kinetic energy of a body varies directly proportional to its velocity.

i.e. Kinetic energy $= \frac{1}{2} \text{mass} \times (\text{ velocity})^2$

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3 years ago

Which conclusion about the atom can be drawn from Rutherford’s gold foil experiment?

Drupady [299]

D. Rutherford found that the atom consists of a small positively charged nucleus.

6 0

3 years ago

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An insulated beaker with negligible mass contains liquid water with a mass of 0.285 kg and a temperature of 75.2 ∘C How much ice

GrogVix [38]

Answer:

Explanation:

We shall apply the theory of

heat lost = heat gained .

heat lost by water = mass x specific heat x temperature diff

= .285 x 4190 x ( 75.2 - 32 ) = 51587.28 J

heat gained by ice to attain temperature of zero

= m x 2100 x 22.8 = 47880 m

heat gained by ice in melting = latent heat x mass

= 334000m

heat gained by water at zero to become warm at 32 degree

= m x 4190 x 32 = 134080 m

Total heat gained = 515960 m

515960 m = 51587.28

m = .1 kg

= 100 gm

4 0

4 years ago