The answer would be D. Because the iron fillings are attracted to the magnet underneath the glass.
<h3><u>Answer;</u></h3>
126 joules
<h3><u>Explanation;</u></h3>
Potential energy is the energy possessed by a body while at rest.
It is calculated by the formula m×g×h; where m is the mass, h is the height and g is the gravitational acceleration, 10N/kg
Potential energy = m×g×h
= 3.0 × 4.2 × 10
<u>= 126 joules</u>
Answer:
Angular momentum = 0.7 kg.m²/s
Angular velocity = 583.3 rad/s
Explanation:
1. The torque τ is related to the angular momentum L by the relation
τ = ΔL/Δt
ΔL = τΔt
τ = 10 N. m
Δt = 70 ms = 70 × 10⁻³s
ΔL = (10 N. m) × (70 × 10⁻³s) = 700 × 10⁻³ kg.m²/s = 0.7 kg.m²/s
2. The rotational inertia I relates the angular momentum L to the angular velocity w
L = Iw
w = L/I
L = 0.7 kg.m²/s
I = 1.2 × 10⁻³ kg.m²
w = (0.7 kg.m²/s)/(1.2 × 10⁻³ kg.m²) = 583.3 rad/s
Answer with Explanation:
We are given that
Current,I=12 A
V=11.5 V
I'=9 A
Internal resistance,r=0.05 ohm
a.We have to find the emf of battery.
Using the formula
b.Voltage of ligh
Hence, the current through the starting motor when the light areon=61 A
Answer:
DL = 0.0105 [m] = 10.57 [mm]
Explanation:
To solve this problem, we use the following equation that involves length changes depending on temperature changes.
where:
DL = length change
α = thermal expansion coefficient = 11 * 10^(-6) [1/°C]
DT = temperature change = (37-6) = 31 [°C]
L = nominal or initial length = 31 [m]
DL = 11 * 10^(-6) * 31 * 31
DL = 0.0105 [m] = 10.57 [mm]