According to the article, what was the effect of elevation on the experimental group?
2 answers:
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Answer:
a. The force of gravity on the droplet is approximately 4.606 × 10⁻¹⁴ Newtons
b. The electric force that balances the force of gravity is approximately -4.606 × 10⁻¹⁴ Newtons
c. The excess charge is approximately -1.439375 × 10⁻¹⁸ C
d. There are approximately 9 excess electrons on the droplet
Explanation:
The parameters of the Millikan experiment are;
The mass of the droplet, m = 4.7 × 10⁻¹⁵ kg
The electric field in which the droplet floats, E = 3.20 × 10⁴ N/C
a. The force of gravity on the droplet, F = The weight of the droplet, W = m × g
Where;
g = The acceleration due to gravity ≈ 9.8 m/s²
W = 4.7 × 10⁻¹⁵ kg × 9.8 m/s² = 4.606 × 10⁻¹⁴ Newtons
∴ The force of gravity on the droplet = W = 4.606 × 10⁻¹⁴ Newtons
b. The electric force that balances the force of gravity, = -W = -4.606 × 10⁻¹⁴ Newtons
c. The excess charge is given as follows;
= q·E
∴ The electric force that balances the force of gravity, = q·E = -4.606 × 10⁻¹⁴ N
q·E = -4.606 × 10⁻¹⁴ N
q = -4.606 × 10⁻¹⁴ N/E
∴ q = -4.606 × 10⁻¹⁴ N/(3.20 × 10⁴ N/C) ≈ -1.439375 × 10⁻¹⁸ C
The excess charge, q ≈ -1.439375 × 10⁻¹⁸ C
d. The charge of one electron, e = 1.602176634 × 10⁻¹⁹C
The number of excess electrons in the droplet, n, is given as follows;
n = 1.439375 × 10⁻¹⁸ C/(1.602176634 × 10⁻¹⁹C) = 8.98387212405 electrons
∴ n ≈ 9 electrons.
The average speed of the car is 65.71 mph.
The given parameters;
initial speed of the car, u = 50 mph
time of motion, t = 3 hours
final speed of the motion, v = 70 mph
time of motion, t = 11 hours
The average speed of the car is calculated as follows;
Average speed = total distance divided by the total time of motion.
The total distance = (50 x 3) + (70 x 11) = 920 miles
The total time of motion, = (3 + 11) = 14 hours.
The average speed of the car is;
Thus, the average speed of the car is 65.71 mph.
Learn more here: the average speed of the car is 65.71 mph.
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