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4 years ago

Which statement describes gravity? Select three options.

Physics

2 answers:

grigory [225]4 years ago

6 0

Answer:

Explanation:

Gravity is force of attraction between bodies that have masses. It is one of the most importance force in the universe that keeps it in an ordered form.

From what is obtainable from newtons law of universal gravitation, which states that "the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them";

we know that;

Gravity is a force of attraction that pulls objects toward the earth's center.
It increases with mass between two objects
It decreases as the distance increases

balandron [24]4 years ago

4 0

Answer:gravity is force

Explanation:

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3 years ago

When a resistor is connected to a 12 volt source, it draws a 185 mA current. what's the resistance? (I said 65 ohms). the same r

lyudmila [28]

Resistance-1 = (voltage-1) / (current-1) =

(12 V) / (0.185 A) = 64.9 ohms .

Resistance-2 = (voltage-2) / (current-2) =

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The poor resistor dissipated 51 times as much power during
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Carbon resistors behave nicely and reliably, until you try to
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3 years ago

Fig. 28-9 shows the cross-section of a hollow cylinder of inner radius a = 5 cm and outer radius b = 7 cm. A uniform current den

Dmitrij [34]

Answer:

1.507×10⁻⁴ T

Explanation:

a = 5 cm = 0.05 m

b = 7 cm = 0.07 m

j = 1 A/cm²

Distance from magnetic field = d = 10 cm = 0.1 m

μ₀ = Vacuum permeability = 4π×10⁻⁷ H/m

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$\oint B.ds=\mu_0 I\\\Rightarrow B2\pi d=\mu_0 I\\\Rightarrow B2\pi d=\mu_0J\pi(b^2-a^2)\\\Rightarrow B=\frac{\mu_0J\pi(b^2-a^2)}{2\pi d}\\\Rightarrow B=\frac{4\pi\times 10^{-7}\times 1\times 10^{-4}\pi(0.07^2-0.05^2)}{2\pi 0.1}\\\Rightarrow B=1.507\times 10^{-4}\ T$

∴ Magnitude of the magnetic field at a distance d = 10 cm from the axis of the cylinder is 1.507×10⁻⁴ T

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4 years ago

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Dafna11 [192]

Answer:C

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