Answer:
Angular speed will reach 6.833rad/s before the coin starts slipping
Explanation:
There is no question but I'll asume the common one: Calculate the speed of the turntable before the coin starts slipping.
With a sum of forces:
At this point, friction force is maximum, so:
Solving for V:
V=1.025 m/s
The angular speed of the turntable will be:
ω = V/R = 6.833 rad/s This is the maximum speed it can reach before the coin starts slipping.
False, Carbon usually forms four covalent bonds.
Answer:
I am not a driver, but I think it's C.
Explanation:
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>
