Answer:
The water takes longer, because it is the better insulator here.
Explanation:
Conductors and insulators work similarly in "reverse".
If something is a good heat conductor, then it's good at both absorbing heat energy and giving it away. Insulators are good at resisting temperature changes, but also take longer to cool down once they are heated up.
So because copper is the better conductor here, it will cool faster than the water at the same temperature.
Answer:
F = 1.2×10⁻³ N
Explanation:
From the question,
Applying newton's second law of motion,
F = m(v-u)/t................... Equation 1
Given: F = magnitude of the average force exerted on the ball, m = mass of the ball, v = final velocity, u = initial velocity, t = time of contact.
Note: let downward be negative and upward be positive.
Given: m = 48 g = 48/1000 = 0.048 kg, v = 17 m/s, u = -28 m/s (downward),
t = 1800 s
Substitute into equation 1
F = 0.048(17-[28])/1800
F = 1.2×10⁻³ N
Answer:
Explanation:
The magnetic field in a solenoid is
B = μ₀ N / L I
Where N is the number of turns, L the solenoid length and I the current
N = B L / μ₀ I
Let's calculate
N = 5.8 10⁻³ 0.18 / 4 π 10⁻⁷ 1
N = 8.3 102 laps
N = 831 laps
Let's find the solenoid length
For this we use a rule of proportions
L_solenoid = Turns * wire diameter
L_ solenoid = 831 * 0.41 10--3
L_solenoid = 0.3407 m
We see that two turns are needed in the wire to have a length of 0.18 m
Answer:
No you can't cuz,if you put water instead of clock oil in Millikan oil drop your experiment will fail and it won't turn out the way you wanted it to be