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sergeinik [125]
3 years ago
7

A 1.5m wire carries a 2 A current when a potential difference of 59 V is applied. What is the resistance of the wire?

Physics
1 answer:
lisabon 2012 [21]3 years ago
6 0

We can use the relation of ohm's law to find out the resistance of wire

V = i R

given that

V = 59 volts

i = 2 A

now as per above formula

59 = 2 * R

R = 29.5 ohm

So resistance of wire is 29.5 ohm.

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Three ropes A, B and C are tied together in one single knot K. (See figure.)
noname [10]

The tension in the rope B is determined as 10.9 N.

<h3>Vertical angle of cable B</h3>

tanθ = (6 - 4)/(5 - 0)

tan θ = (2)/(5)

tan θ = 0.4

θ = arc tan(0.4) = 21.8 ⁰

<h3>Angle between B and C</h3>

θ = 21.8 ⁰ + 21.8 ⁰ = 43.6⁰

Apply cosine rule to determine the tension in rope B;

A² = B² + C² - 2BC(cos A)

B = C

A² = B² + B² - (2B²)(cos A)

A² = 2B² - 2B²(cos 43.6)

A² = 0.55B²

B² = A²/0.55

B² = 65.3/0.55

B² = 118.73

B = √(118.73)

B = 10.9 N

Thus, the tension in the rope B is determined as 10.9 N.

Learn more about tension here: brainly.com/question/24994188

#SPJ1

3 0
2 years ago
Which statement accurately describes the motion of the objects in the ticker tape above?
Fynjy0 [20]

Answer: "One object speeds up before it slows to a stop "

(the top one)

Explanation:

Ok, first a little recall on how to read this type of graph.

If the points are far apart, the object is moving fast.

If the points are close together, the object is moving slow.

If the distance between the points changes then the velocity of the object changes, which means that the object is accelerated.

If we have a lot of points clustered in one location, then the object is not moving.

We can see:

The top object starts slow, then it increments the speed, then it slows down again, and then it comes to stop.

The bottom object starts fast, and it slows down.

then:

"One object speeds up before it slows to a stop "

This describes the motion of the top object, this is the only correct option that describes one of the graphs.

5 0
3 years ago
A movie stunt performer is filming a scene where he swings across a river on a vine. The safety crew must use a vine with enough
Julli [10]

Answer:

1125.66956 N

Explanation:

m = Mass of stunt performer

g = Acceleration due to gravity = 9.81 m/s²

v = Velocity of the swing = 7 m/s

T = Tension

r = Radius of the swing = Length of vine = 11.5 m

From the free body diagram

T-mg-m\frac{v^2}{r}=0\\\Rightarrow T=mg+m\frac{v^2}{r}\\\Rightarrow T=m(g+\frac{v^2}{r})\\\Rightarrow T=80(9.81+\frac{7^2}{11.5})\\\Rightarrow T=1125.66956\ N

The minimum tension force the vine must be able to support without breaking is 1125.66956 N

7 0
3 years ago
A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 29.6 m/s. At the same time, it h
inessss [21]

If the vertical component is 29.6 m/s down, and the horizontal component
is 54.8 m/s parallel to the surface, then the magnitude of the slanty vector is

   √(29.6² + 54.8²) = √(876.16 + 3003.04) = √3879.2  =  62.28 m/s .

That's 139 mph !  Wow !

6 0
3 years ago
Fill in the blank: energy can never be created nor destroyed just _ or _
Alja [10]
I know one is transformed, not sure about another
4 0
3 years ago
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