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3 years ago

15

Which of the following would INCREASE the circuit's resistance?

1 answer:

Alex777 [14]3 years ago

3 0

Answer:

"length - longer wires have greater resistance. thickness - smaller diameter wires have greater resistance. temperature - heating a wire increases its resistance." So, answer D, longer wire.

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Which undefined term is being used to define angle

Naddika [18.5K]

Point line and plane!

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4 years ago

Read 2 more answers

A bicycle rider has a speed of 20.0 m/s at a height of 60 m above sea level when he begins coasting down hill. Sea level is the

IRINA_888 [86]

Answer:

The rider's speed will be approximately 35 m/s

Explanation:

Initially the rider has kinetic and potential energy, and after going down the hill, some of the potencial energy turns into kinetic energy. So using the conservation of energy, we have that:

$kinetic_1 + potencial_1 = kinetic_2 + potencial_2$

The kinetic and potencial energy are given by:

$kinetic = mass * speed^2 / 2$

$potencial = mass * gravity * height$

So we have that:

$m*v^2/2 + mgh = m*v'^2/2 + mgh'$

$20^2/2 + 9.81*60 = v'^2/2 + 9.81*18$

$v'^2/2 + 176.58 = 788.6$

$v'^2/2 = 612.02$

$v'^2 = 1224.04$

$v' = 34.99\ m/s$

So the rider's speed will be approximately 35 m/s

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3 years ago

3.) What is the velocity of a 5.5 kg object that has a momentum of 550 kg-m/s?

stepladder [879]

Answer:

idk

Explanation:

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3 years ago

A potential difference of 3.27 nV is set up across a 2.16 cm length of copper wire that has a radius of 2.33 mm. How much charge

miskamm [114]

Answer:

Charge = 4.9096 x 10⁻⁷ C

Explanation:

First, we find the resistance of the copper wire.

R = ρL/A

where,

R = resistance = ?

ρ = resistivity of copper = 1.69 x 10⁻⁸ Ω.m

L = Length of wire = 2.16 cm = 0.0216 m

A = Cross-sectional area of wire = πr² = π(0.00233 m)² = 1.7 x 10⁻⁵ m²

Therefore,

R = (1.69 x 10⁻⁸ Ω.m)(0.0216 m)/(1.7 x 10⁻⁵ m²)

R = 2.14 x 10⁻⁵ Ω

Now, we find the current from Ohm's Law:

V =IR

I = V/R

I = 3.27 x 10⁻⁹ V/2.14 x 10⁻⁵ Ω

I = 1.52 x 10⁻⁴ A

Now, for the charge:

I = Charge/Time

Charge = (I)(Time)

Charge = (1.52 x 10⁻⁴ A)(3.23 x 10⁻³ s)

<u>Charge = 4.9096 x 10⁻⁷ C</u>

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4 years ago

Land masses that move on Earth are called: a. Continents b. Tectonic continents c. Tectonic plates d. Rock Masses

Andrew [12]

Answer:

c. tectonic plates

Explanation:

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4 years ago