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3 years ago

Brainliest to correct answer

Physics

1 answer:

Roman55 [17]3 years ago

7 0

Answer:

0.061m

Explanation:

Given the following

image distance v = 0.080m

Object distance u = 0.25m

For concave mirror, the image distance is positive

Using the mirror formula;

1/f = 1/u + 1/v

1/f = 1/0.25 + 1/0.080

1/f = 4 + 12.5

1/f = 16.5

f = 1/16.5

f = 0.061m

Hence the focal length of the mirror is 0.061m

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Eddi Din [679]

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3 years ago

A 52–newton bird feeder is tied to a cord, which is attached to a tree branch. Describe the tension force of the rope.

ziro4ka [17]

Hi, thank you for posting your question here at Brainly.

When the object is at equilibrium and the object is just freely hanging from the cord, then the summation of forces along the y direction would just be the tension of the cord and the weight of the object. Since both forces are opposite in direction, at equilibrium, they are equal. Hence, in this case, the tension is also equal to 52 N.

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3 years ago

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A yellow train of mass 100 kg is moving at 8 m/s toward an orange train of mass 200 kg traveling in the opposite direction on th

Serhud [2]

The initial momentum of the yellow and the orange train is 1000kgm/s.

Momentum is the product of the mass and velocity of any object.

Momentum is denoted by P.

Momentum P = mv , where m = mass and v = velocity.

<h3>Given:</h3>

Mass of the orange train = 200kg

Velocity of the orange train = 1m/s

So, the momentum of the orange train will be,

∴ P = mv

P = 200 x 1

P = 200 kgm/s

∴ The initial momentum of the orange train is 200kgm/s.

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So, the momentum of the yellow train will be,

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Therefore, the initial momentum of the yellow and the orange train is 1000kgm/s.

Learn more about momentum here:

brainly.com/question/25849204

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2 years ago

A driver followed a man with a surfboard strapped on top. The driver claims that the van stopped so quickly that the surfboard f

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It is not possible because if they stop so quickly the surfboard with the motion forward continuing the motion of the van, not backwards

This isn’t the greatest, but I hope it helps

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3 years ago

Below is a circuit schematic of sources and resistors (Figure 3). VS = 10V , R1 = 100Ω, R2 = 50Ω, R3 = 25Ω, IS = 2A. Calculate t

lorasvet [3.4K]

Answer:

$V_3\approx 4.28\,\,V$

$I_1=0.0572\,\,amps$

$I_3\approx 0.171\,\,amps$

Explanation:

Notice that this is a circuit with resistors R1 and R2 in parallel, connected to resistor R3 in series. It is what is called a parallel-series combination.

So we first find the equivalent resistance for the two resistors in parallel:

$\frac{1}{Re}= \frac{1}{R1}+\frac{1}{R2}\\\frac{1}{Re}= \frac{1}{100}+\frac{1}{50}\\\frac{1}{Re}= \frac{3}{100}\\Re=\frac{100}{3} \,\,\Omega$