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Yakvenalex [24]
3 years ago
14

A 9,100​-microfarad ​[mu​F] capacitor is charged to 22 volts​ [V]. If the capacitor is completely discharged through an iron rod

0.2 meters​ [m] long and​ one-quarter centimeter​ [cm] in​ diameter, resulting in 80​% of the stored energy being transferred to the rod as​ heat, how much does the temperature of the rod​ increase? Give your answer in kelvin​ [K].  
Data you may​ need:
Specific Gravity of​ iron: SG = 7.874
Specific heat of​ iron: CP = 0.450 ​J/(g K)

Physics
1 answer:
MakcuM [25]3 years ago
5 0

Answer:

The temperature rises by 0.52K

Explanation:

Detailed explanation and calculation is shown in the image below

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A seasoned mini golfer is trying to make par on a tricky number five hole. The golfer can complete the hole by hitting the ball
liberstina [14]

Answer:5.17 m/s

Explanation:

Given

let u be the speed at cliff initial point

range over cliff is 1.45 m

and range of projectile is given by

R=\frac{u^2\sin 2\theta }{g}

1.45=\frac{u^2\sin 90}{9.8}

u=3.77 m/s

Conserving Energy

E_{bottom}=E_{initial\ point\ at\ cliff}

Kinetic energy=Kinetic energy +Potential energy gained

Let v be the initial velocity

\frac{mv^2}{2}=mgh+\frac{mu^2}{2}

v^2=u^2+2gh

v=\sqrt{u^2+2gh}

v=\sqrt{3.77^2+2\time 9.8\times 0.64}

v=\sqrt{26.75}=5.17 m/s

5 0
2 years ago
True or False: Inertia is the property that every material object has that causes objects to resist changes in its state of moti
goldfiish [28.3K]
That is True because if it resists it means to not do it and if it is motion, that means that it is resisting movement and that is what inertia is.

The scientific definition for inertia is: "a tendency to do nothing or to remain unchanged"
Glad to help. :)
6 0
3 years ago
Which of these statements partially defines law?
xz_007 [3.2K]

Answer: I dont see the option choices

Explanation:

5 0
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Marcus drove his Honda Prelude for 4 hours at a rate of 55 miles per hour. How far did he travel?
Leto [7]
D.220 miles is the correct answer
5 0
3 years ago
Read 2 more answers
I need help with these Physics problems​
adoni [48]

Answer:

1. 3 m

2. 27 s

Explanation:

1. "A car traveling at +33 m/s sees a red light and has to stop.  If the driver can accelerate at -5.5 m/s², how far does it travel?"

Given:

v₀ = 33 m/s

v = 0 m/s

a = -5.5 m/s²

Unknown: Δx

To determine the equation you need, look for which variable you don't have and aren't solving for.  In this case, we aren't given time and aren't solving for time.  So look for an equation that doesn't have t in it.

Equation: v² = v₀² + 2aΔx

Substitute and solve:

(0 m/s)² = (33 m/s)² + 2(-5.5 m/s²) Δx

Δx = 3 m

2. "A plane starting from rest at one end of a runway accelerates at 4.8 m/s² for 1800 m.  How long did it take to accelerate?"

Given:

v₀ = 0 m/s

a = 4.8 m/s²

Δx = 1800 m

Unknown: t

Equation: Δx = v₀ t + ½ a t²

Substitute and solve:

1800 m = (0 m/s) t + ½ (4.8 m/s²) t²

t ≈ 27 s

4 0
3 years ago
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