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Mariana [72]
3 years ago
7

House current is 120 volts. If a light bulb runs a current of 10 amps, what is the resistance?

Physics
1 answer:
nlexa [21]3 years ago
6 0

Answer:

12 ohms

Explanation:

Ohm's Law tells the relationship between voltage, current, and resistance.

It can be written in three different ways, depending on which ones you know,

and which one you want to find.

Here's the one we need:        

                          Resistance  =  (voltage) divided by (current)

                                              =  (120 V)  /  (10 Amp)

                                              =          12 ohms .

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We need to know about the uncertainty of measurement to solve this problem. The uncertainty of cube volume can be determined by

V = s³

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where V is volume, s is length, ΔV is uncertainty in the volume and Δs is the uncertainty of length.

From the question above, we know that

s = 1.00 m

Δs = 2% of s = 2/100 x 1 = 0.02 m

By using the uncertainty of volume formula, we get

|ΔV| = dV/ds x Δs

|ΔV| = d(s³)/ds x Δs

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|ΔV| = 3. 1² x 0.02

|ΔV| = 0.06 m³

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Satellite C revolves around Earth 10 times a day. What is the radius of its orbit, measured from Earth's center? Assume that Ear
frez [133]

The radius of its orbit, measured from Earth's center, will be 1.44 × 10⁷ mm.

<h3>What is Newton's law of gravitation?</h3>

Newton's law of gravity states that each particle having mass in the universe attracts each other particle with a force known as the gravitational force.

Given data in problem is;

The mass of Earth is, \rm m_E = 5.98 \times 10^{24} \ kg

Gravitational constant, G =6.674 × 10⁻¹¹ N m₂/kg²

The gravitational force is proportional to the product of the masses of the two bodies and inversely proportional to the square of their distance.

\rm F_g = \frac{Gm_sm_e}{r^2}

The centripetal force due to rotation of the satellite;

\rm F_c = \frac{m_s v^2}{r}

The centripetal and the gravitational force are equal;

\rm F_g = F_c  \\\\  \frac{Gm_sm_e}{r^2} =  \frac{m_s v^2}{r} \\\\ r = G \frac{m_E }{v^2 } \\\\ r = G \frac{m_E }{(r \omega )^2 } \\\\ r = \sqrt[3]{\frac{Gm_E}{\omega^2}} \\\\ r = \sqrt[3]{\frac{6.67 \times 10^{-11}(5.98 \times 10^{24})}{(3.63 \times 10^{-4})^2}} \\\\ r = 1.44 \times 10^7   \ mm

Hence, the radius of its orbit measured from Earth's center will be 1.44 × 10⁷ mm.

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Which state Which states of matter have a set volume? Explain why this is, based on the animations you observed for the differen
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Answer:

The volume of the block is equal to the volume of water displaced by the block.

Explanation:

Volume refers to the amount of space occupied by a given object (in this case the block). When an object such as the block is immersed in water, it displaces its own volume of water. This volume of water displaced is equal to the volume of the block. Hence we can write;

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Recall that the density of a body is given by;

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