Physics
18.05.2023 19:23
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The 1.00-cm-long second hand on a watch rotates smoothly. what is its angular velocity?
The 1.00-cm-long second hand on a watch rotates smoothly.
what is its angular velocity? what is the speed of the tip of the hand?
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what is its angular velocity? what is the speed of the tip of the hand?
byrdkellykellybyrd
4,6(88 marks)
Angular velocity = 0.105 rads⁻¹
speed of tip = 0.00105 ms⁻¹
Explanation:
A second hand turns 2π rad each 60 sec
Thus: it has an angular speed given by
ω = 2π/T = 2π/60 = π/30 = 0.105 rad s⁻¹
The speed of the tip is given by
V= rω = 0.01 m × (0.105 rads⁻¹)
= 0.00105 ms⁻¹
YouKnowGucci
4,7(33 marks)
Each atom within a specific element has the same number of protons, which determines its atomic number.
Protons determine an atoms atomic number
Ex:
Carbons atomic number: 6
Carbons number of protons: 6
Oxygens atomic number: 8
Oxygens number of protons: 8
Protons determine an atoms atomic number
Ex:
Carbons atomic number: 6
Carbons number of protons: 6
Oxygens atomic number: 8
Oxygens number of protons: 8
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