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3 years ago

100 POINTS and BRAINLIEST to best answer please help ASAP!

Physics

1 answer:

LenKa [72]3 years ago

6 0

Answer:

Dude its just a picture of evaporation taking place in a.....................I don't know.

Explanation:

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Why is creativity important in constructing scientific questions?

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4 years ago

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HELPPPP QUESTION IS ABOVE

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Answer:

discount rate

Explanation:

i could be wrong but i believe thats what it is

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3 years ago

A wire with a linear mass density of 1.19 g/cm moves at a constant speed on a horizontal surface and the coefficient of kinetic

scZoUnD [109]

Answer:

The magnitude and direction of the smallest magnetic field that can accomplish this are 0.172 T and vertically to the east.

Explanation:

given information:

density of wire, m/l = 1.19 g/cm = 0.119 kg/m

coefficient of kinetic friction, μk = 0.250

current, I = 1.7 A

according to the Newton's first law

∑F = 0

F(magnetic) - F(friction) = 0

F(magnetic) = F(friction)

F(magnetic) = B i l sin θ

where

F (magnetic) = magnetic force

B = magnetic field (T)

i = current (A)

l = the length of wire (m)

θ = angle

and

F(friction) = μk N

where

F(friction) = kinetic force (N)

μk = coefficient of kinetic friction

N = Normal force (N)

so,

F(magnetic) = F(friction)

B i l sin θ = μk N

B = μk N/i l sin θ

now lets determine the normal force

N - mg = 0

N = mg

therefore

B = μk mg/i l sin θ

θ = 90° because the magnetic field is perpendicular to the wire (smallest magnetic field)

B = μk mg/i l sin 90

= μk mg/i l

= (μk g/i) (m/l)

= ((0.250) (9.8) / (1.7)) ((0.119)

= 0.172 T

according to the right hand rule, the direction of the magnetic field is vertically to the east. (magnetic force to the south and current to the westward)

8 0

3 years ago

A nichrome wire has a resistance of 5

kari74 [83]

Answer:

R = 6.67 Ohm's

Explanation:

Resistance is a property of a material that measures the opposition to the flow of current through the material. It is measured in Ohm's.

R = (ρl) ÷ A

where; R is the resistance of the material, A is its cross sectional area, l is its length and ρ is its resistivity.

For the first nichrome wire, resistance is 5 Ohm's.

i.e R = (ρl) ÷ A = 5 Ohm's

For the second nichrome wire, length = 4l, and area of cross section = 3A. The resistance of the second wire can be determined by;

R = (4ρl) ÷ 3A

= $\frac{4}{3}$ {(ρl) ÷ A}

= $\frac{4}{3}$ × 5

R = 6.67 Ohm's

Resistance of the second nichrome wire is 6.67 Ohm's.

4 0

3 years ago