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horrorfan [7]
4 years ago
11

A metal wire of resistance R is cut into two pieces of equal length. The two pieces are connected together side by side. Part A

What is the resistance of the two connected wires?
Physics
1 answer:
wlad13 [49]4 years ago
7 0

Answer:

R/2

Explanation:

Resistance of full lenght wire = R

Since length is divided into half but even then the resistance of each individual half is same i-e R

If connecetd into parallel mode then we know resultant resistance say 'r' is

1/r=1/R+1/R

or

1/r = 2/R

r= R/2

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A) as a longitudinal wave
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What is the momentum of a baseball with a mass of 4 kg being thrown at a velocity of 84 m/s towards the hitter
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Answer:

<h3>The answer is 336 kgm/s</h3>

Explanation:

The momentum of an object can be found by using the formula

<h3>momentum = mass × velocity</h3>

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mass = 4 kg

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momentum = 4 × 84

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A hot air balloon is traveling vertically upward at a constant speed of 4.5 m/s. When it is 28 m above the ground, a package is
ella [17]

Answer:

1.97 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

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s=ut+\frac{1}{2}at^2\\\Rightarrow 21=4.5t+\frac{1}{2}\times -9.8\times t^2\\\Rightarrow 21=-4.5t-4.9t^2\\\Rightarrow 4.9t^2+4.5t-28=0\\\Rightarrow 49t^2+45t-280=0

Solving the above equation we get

t=\frac{-45+\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}, \frac{-45-\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}\\\Rightarrow t=1.97, -2.89

So, the time the package was in the air is 1.97 seconds

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3 years ago
A cannonball is launched off a 100 m cliff horizontally with an initial velocity of 50 m/s. The goal is to have the cannonball t
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