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Brilliant_brown [7]
3 years ago
11

A student finds a resistor in an old transistor radio. When the resistor is attached to a 1.5 V cell, the flow of current is mea

sured at 0.025 A. When the resistor is attached to four 1.5 V cells, the current is measured at 0.1 A. When the resistor is attached to a 9 V battery, the current is measured at 0.15 A. Is the resistor an ohmic resistor? Explain how you know.
Physics
1 answer:
valkas [14]3 years ago
3 0

Answer:

yes

Explanation:

because no matter what voltage you connect it up to, the current always increases proportionally to the voltage.

this is because it follows ohm's law V = I X R.

(voltage = current X resistance)

so to calculate the resistance, change the formula to R = V / I giving you 60 ohm (resistor value)

the value of the resistor is always 60 ohm's, no matter which combination of voltage and current you used and measured, so it follows ohm's law, therefore being an ohmic resistor

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Which words help you to determine the meaning of the word decelerate in paragraph 3
Novay_Z [31]

Answer:

the words

Explanation:

4 0
3 years ago
The element in a fluorescent lightbulb that absorbs UV light and releases visible light energy is ____?
Mnenie [13.5K]
So in a fluorescent light bulb the mercury atoms release the UV light. This UV light is absorbed by the phosphorous powder coating inside and this releases the visible light.
So your answer is phosphorous powder.
3 0
3 years ago
Read 2 more answers
The two hot-air balloons in the drawing are 48.2 and 61.0 m above the ground. A person in the left balloon observes that the rig
Lynna [10]

Answer:

x = 54.15 meters between the balloons horizontally.

Explanation:

Hence, vertical distance between balloons is 12.8 meters.

y= 61-48.2  = 12.2 m

A right-angle triangle is formed with,

angle θ = 13.3 degrees

opposite (y) = 12.8

adjacent (x) = ?

tan\theta = \dfrac{y}{x}

Now by putting the values in the above equation.

tan13^{\circ}=\dfrac{12.8}{x}

x=\dfrac{12.8}{tan13^{\circ}}

x = 54.15 meters between the balloons horizontally.

8 0
3 years ago
Suppose that the Millennium Falcon orbits the Death Star 20,000m above the Star’s surface. Calculate the circular orbit velocity
Nataly [62]

Answer:

18.4 m/s

Explanation:

The gravitational force between the Death Star and the Millenium Falcon is equal to the centripetal force that keeps the Millenium Falcon in circular orbit:

G\frac{Mm}{(R+h)^2}=m\frac{v^2}{R+h}

where

G=6.67\cdot 10^{-11} m^3 kg^{-1} s^{-2} is the gravitational constant

M=5.1\cdot 10^{17} kg is the mass of the planet

m=1.36\cdot 10^6 kg is the mass of the Millennium Falcon

v is the orbital velocity of the Millennium Falcon

R=\frac{160,000 m}{2}=80,000 m is the radius of the Death Star

h=20,000 m is the altitude of the Millennium Falcon above the planet's surface

Solving the equation for v, we find the orbital velocity:

v=\sqrt{\frac{GM}{R+h}}=\sqrt{\frac{(6.67\cdot 10^{-11})(5.1\cdot 10^{17} kg)}{80,000 m+20,000 m}}=18.4 m/s

5 0
3 years ago
Two long, parallel wires each carry the same current I, but the two currents are anti-parallel. The two wires are a distance r a
Georgia [21]

Answer:

8 x 10⁻⁷ x  I / r

Explanation:

Two parallel long wires are carrying current I . Let the direction be towards the right in the farthest and towards the left in the nearest. Magnetic field due to current I  at a  distance d is given by the expression

B = μ₀ 2 I / 4π d

I the present case distance d = r/2  

Magnetic field due to one wire at point d = r/2  is

B₁ = μ₀ 2 I / (4π r / 2 )

= 10⁻⁷ x 4I / r

Magnetic field due to the other wire at point d = r/2  is

B₂ = μ₀ 2 I / (4π r / 2 )

= 10⁻⁷ x 4I / r

Direction of magnetic field due to both the wires at the mid  point P will be same . It will be in downward direction in the given scenario

So total magnetic field

B = B₁ + B₂

= 2 x  10⁻⁷ x 4I / r

= 8 x 10⁻⁷ x  I / r

6 0
3 years ago
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