The element in an incandescent light bulb that releases light energy is _____. a phosphor mercury vapor a thin tungsten filament
2 answers:
<u>Answer:</u> The correct answer is thin tungsten filament.
<u>Explanation:</u>
Incandescent light bulb is a substance which converts electrical energy to light and heat energy and has fine filament made of metal.
These bulbs have fine filament to have the maximum resistance as we know that resistance is inversely proportional to the area of cross section of the wire.
Metal used in the filament is tungsten because it has the highest melting point of
Hence, the correct answer is thin tungsten filament.
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The average angular speed of the grindstone is 10 rad/s
<em>Let's recall </em><em>Angular Speed</em><em> formula as follows:</em>
<em>where :</em>
<em>ω = final angular speed ( rad/s )</em>
<em>ω₀ = initial angular speed ( rad/s )</em>
<em>α = angular acceleration ( rad/s² )</em>
<em>t = elapsed time ( s )</em>
<em>θ = angular displacement ( rad )</em>
<u>Given:</u>
radius of the grindstone = R = 4.0 m
initial angular speed = ω₀ = 8.0 rad/s
final angular speed = ω = 12 rad/s
elapsed time = t = 4.0 seconds
<u>Asked:</u>
average angular speed = ?
<u>Solution:</u>
<em>Firstly , we will calculate </em><em>angular displacement </em><em>as follows:</em>
<em>Next , we could calculate the </em><em>average angular speed</em><em> as follows:</em>
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Grade: High School
Subject: Physics
Chapter: Rotational Dynamics
Answer:
1) No, the car does not travel at constant speed.
2) V = 9 ft/s
3) No, the car does not travel at constant speed.
4) V = 5.9 ft/s
Explanation:
In order to know if the car is traveling at constant speed we need to derive the given formula. That way we get speed as a function of time:
V(t) = 2*t + 2 Since the speed depends on time, the speed is not constant at any time.
For the average speed we evaluate the formula for t=2 and t=5:
d(2) = 8 ft and d(5) = 35 ft
Again, for the average speed we evaluate the formula for t=1.8 and t=2.1:
d(1.8) = 6.84 ft and d(2.1) = 8.61 ft
Answer:
The force will be
Explanation:
Let's use the centripetal force equation.
Where:
m is the mass of the bunch of bananas
ω is the angular speed
R is the radius
Now, 1 rev every 4 seconds or 0.25 rev/sec is the angular speed, but we need to write this speed in rad per second.
FInally, the force will be:
I hope it helps you!