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liraira [26]
3 years ago
13

Water on a smooth floor can made you slip, which means water is also a lubricant. Can you think of reasons why oil and grease an

d not water is used i machines as a lubricant?
Physics
1 answer:
DiKsa [7]3 years ago
3 0

Answer:Water is easily evaporated, and oil and grease will not evaporate.

Explanation:

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Three long cables running north and south, are tightly enclosed in an insulating sheath. One of the cables carries a 23 A curren
Nikolay [14]

Answer:

Explanation:

Magnitude of magnetic field due to a current carrying conductor

= ( μ₀ / 4π ) x 2I / d   , I is current , d is distance from wire . This formula has been derived from Ampere's Law.

= 10⁻⁷ x  2 x 23 / 10 Current given  I = 23

= 46 x 10⁻⁸ T .

Magnetic field due to current 17 A

10⁻⁷ x  2 x 17 / 10

= 34 x 10⁻⁸ T .

Magnetic field due to current 11 A

10⁻⁷ x  2 x 11 / 10

= 22 x 10⁻⁸ T .

magnetic field due to current 17 A and 11 A are in same direction so total magnetic field

= 34 x 10⁻⁸ + 22 x 10⁻⁸

= 56 x 10⁻⁸ T

magnetic field due to current 23 A  in opposite direction so total magnetic field

= 46 x 10⁻⁸ - 56 x 10⁻⁸

= - 10 x 10⁻⁸ T

Magnitude = 10 x 10⁻⁸ T .

4 0
3 years ago
Ball a of mass 5.0 kilograms moving at 20 meters per second collides with ball b of unknown mass moving at 10 meters per second
RUDIKE [14]

M = mass of the ball A = 5.0 kg

m = mass of the ball B = ?

V = initial velocity of the ball A before collision = 20 m/s

v = initial velocity of the ball B  before collision = 10 m/s

V' = final velocity of the ball A after collision = 10 m/s

v' = final velocity of the ball B after collision = 15 m/s

using conservation of momentum

M V + m v = M V' + m v'

(5.0) (20) + m (10) = (5.0) (10) + m (15)

100 + 10 m= 50 + 15 m

5 m = 50

m= 10 m/s



4 0
3 years ago
Based on the way living things are organized ehat level combines to form organ ststems
Eddi Din [679]

Answer:

Higher levels of organization are built from lower levels.

Molecules combine to form cells.

Cells combine to form tissues.

Tissues combine to form organs.

Organs combine to form organ systems,

and organ systems combine to form organisms.

Explanation:

Hope it helps.

3 0
2 years ago
An object is hanging by a string from the ceiling of an elevator. the elevator is moving upward with a constant speed. what is t
Anarel [89]

Since the elevator is moving with a constant speed and not accelerating, the tension in the string is simply the normal, routine, everyday boring weight of the object.  Since the elevator is moving with a constant speed and not accelerating, the tension in the string is simply the normal, routine, everyday boring weight of the object.  

6 0
4 years ago
Read 2 more answers
Pls help me with my work
Alenkinab [10]
I think it’s the first diagram
5 0
3 years ago
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