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3 years ago

What did Galileo discover when he dropped two cannon balls of different weights from the Leaning Tower of Pisa?

2 answers:

Studentka2010 [4]3 years ago

7 0

Galileo discovered that gravity affects acceleration of objects regardless of their mass. The cannon balls were different weights and were dropped from different heights yet both balls landed at the same time.

trasher [3.6K]3 years ago

3 0

Answer:

Galileo discovered that gravity affects acceleration of objects regardless of their mass

Explanation:

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Acceleration increases

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3 years ago

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The direction in which heat flows between two bodies depend on their

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4 years ago

An RLRL circuit with with a 1212-ΩΩ resistor and a 0.06−H0.06−H inductor carries a current of 1A1A at t=0t=0, at which time a vo

tankabanditka [31]

Answer:

The equation of current is $I=0.86 cos \left (120 t + \frac{\pi}{2} \right )$

Explanation:

Resistance, R = 12 ohm

Inductance, L = 0.06 H

E (t) = 12 cos (120 t)

Compare with the standard equation,

$E=E_{0}cos (2\pi ft)$

$2\pi ft = 120 t \\\\\\w = 2\pi f = 120 rad/s$

So, the inductive reactance is

XL = w L = 120 x 0.06 = 7.2 ohm

The impedance of the circuit is

$Z =\sqrt{12^2+7.2^2}\\\\Z = 14 ohm$

The current leads by 90degree so the equation of current is

$I=\frac{Eo}{Z} cos \left (120 t + \frac{\pi}{2} \right )\\\\I=\frac{12}{14} cos \left (120 t + \frac{\pi}{2} \right )\\\\I=0.86 cos \left (120 t + \frac{\pi}{2} \right )$

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3 years ago

What is one way that light waves differ from sound waves?(1 point)

Shalnov [3]

Light waves are transverse while sound waves are longitudinal. Light waves can travel in vacuum. Sound waves require a material medium to travel, and hence, cannot travel in vacuum. The speed of light in a medium is constant.

Hope this helps!
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2 years ago