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blondinia [14]
3 years ago
12

Define potential energy. Give its mathematical formula and SI unit.

Physics
1 answer:
Stels [109]3 years ago
3 0

Answer:

The type of mechanical energy that is possessed due to the virtue of motion or state of a body is known as potential energy.

Its formula: PE= mgh

Its SI unit is joule.

Hope it helps you..

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How much time does it take to roll a ball 2 meters on a steep slope
11111nata11111 [884]

Answer:

asdadsadada

Explanation:

8 0
3 years ago
A ray in glass arrives at the glass-water interface at an angle of 48° with the normal. The refracted ray, in water, makes a 72°
dimaraw [331]

Answer:

50.4°

Explanation:

Snell's law states:

n₁ sin θ₁ = n₂ sin θ₂

where n is the index of refraction and θ is the angle of incidence (relative to the normal).

When θ₁ = 48°:

n sin 48° = 1.33 sin 72°

n = 1.702

When θ₁ = 37°:

1.702 sin 37° = 1.33 sin θ

θ = 50.4°

3 0
3 years ago
When a fluid flows over an object, the "friction drag": __________.A.is the drag due to the shear stress only. B. depends only o
astra-53 [7]

Answer:

D. is greater for turbulent flow than for laminar flow

Explanation:

what is friction drag?

  • friction drag is a phenomenon experienced when a body moves through a fluid. A practical example can be seen in the mild warmth we experience rubbing the palm's of one's hand together only in this case we are dealing with a solid body and a fluid (e.g air, water). friction drag is directly proportional to the area of the surface in contact with the fluid and increases as velocity increases. We see a practical example of this when the rate at which one rubs the palms together is fast but we use the word turbulent when we are dealing with fluids. Turbulent flow creates more friction drag than laminar flow( Flow between a smooth body and fluid) due to its greater interaction with the surface of the body
  • it is important to know that friction is also called viscous drag or skin drag
  • I recommend Richardson and coulson vol 2 textbook, page 149, Chemical enginering fluid mechanics textbook by Ron dardy, page 341 for clearer explanation
4 0
3 years ago
Could someone help me :
Feliz [49]
Wind power is the use of wind to provide the mechanical power through wind turbines & “Thermal” power plants convert heat into electricity using steam. Hydroelectricity is electricity made by generators that are pushed by the movement of water
5 0
3 years ago
The diagram shows the four primary steps in the production of work in a four-stroke heat engine.
Alika [10]

Answer:

D- Z, X, Y, W

Explanation:

Correct on edge

6 0
3 years ago
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