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3 years ago

Explain the law of conservation of energy. Discuss at least one example that illustrates this law.

2 answers:

6 0

The law of conservation of energy is a law of science that states that energy cannot be created or destroyed, but only changed from one form into another or transferred from one object to another. In my personal opinion, lets think of a example like this water can produce electricity. Water falls from the sky, converting potential energy to kinetic energy. This energy is then used to rotate the turbine of a generator to produce electricity. In this process, the potential energy of water in a dam can be turned into kinetic energy which can then become electric energy.

Vesnalui [34]3 years ago

4 0

The total energy of an isolated system remains constant it would be said to be conserved over time. Energy can neither be created nor destroyed, instead it transforms from one form to another. Satellites in space and pendulums are examples of conservation of energy.

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INTEGRATED SCIENCE-8th grade science Please help report cards are due for me at dec.18

serious [3.7K]

Answer:

Our drinking water comes from lakes, rivers and groundwater. For most Americans, the water then flows from intake points to a treatment plant, a storage tank, and then to our houses through various pipe systems. A typical water treatment process.

Explanation:

7 0

3 years ago

A block is at rest on the incline shown in the gure. The coefficients of static and kinetic friction are 0.6 and 0.51, respec- t

Alekssandra [29.7K]

Normal reaction force on the block while it is at rest on the inclined plane is given as

$F_n = mgcos\theta$

here we know that

m = 46 kg

$\theta = 29^o$

now we will have

$F_n = 46*9.8*cos29 = 394.3 N$

now the limiting friction or maximum value of static friction on the block will be given as

$F_s = \mu_s * F_n$

$F_s = 0.6 * 394.3 = 236.56 N$

Above value is the maximum value of force at which block will not slide

Now the weight of the block which is parallel to inclined plane is given as

$F_{||} = mg sin\theta$

here we know that

$F_{||} = 46*9.8 sin29 = 218.55 N$

Now since the weight of the block here is less than the value of limiting friction force and also the block is at rest then the frictional force on the block is static friction and it will just counter balance the weight of the block along the inclined plane.

So here friction force on the given block will be same as its component on weight which is 218.55 N

5 0

3 years ago

Sodium Bicarbonate is a common _____

AleksAgata [21]

Sodium bicarbonate is a common base

6 0

3 years ago

Which SPF level should a person look for in sunscreen as part of planning a day at the beach? pls i need it now

slega [8]

Hope you do well on the test and hope this helps!

3 0

4 years ago

A diver, of mass 40kg, climbs up to a diving platform 1.25m high. What’s her KE

Leona [35]

Explanation:

The formula for KE ( Kinetic Energy ) is : 1/2 mv²

Solution:

First we solve for v ( velocity ) using the formula 2gh, where g is gravity [ 9.8 m/s² ] and h is height [ 1.25 m ]

= 2 ( 9.8 m/s² × 1.25 m ) = 24.5 m/s

The velocity is 24.5 m/s.

Now solve for KE using the formula 1/2 mv²

= 1/2 ( 40 kg × 24.5m/s ² )

= 1/2 ( 40 kg × 600.25 )

= 1/2 ( 24,010 )

= 12,005 Joules

The diver's kinetic energy is 12,005 J.

6 0

2 years ago