Answer:
SI system of mesurment is used by most countries around the world.
A voltage source is a two terminal device which can maintain a fixed voltage.
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas (plasma).
Soil is composed of small pieces of a variety of materials, so it is a heterogeneous mixture. The answer would be C (mixture) :)
Answer:
8.04 second
Explanation:
torque = 500 Nm
Length of blade, L = 2.4 m
mass of blade, m 40 kg
initial angular velocity, ωo = 0 rad/s
frequency, f = 2000 rpm = 2000 / 60 rps
final angular velocity, ωf = 2 x π x 2000 / 60 = 209.33 rad/s
Moment of inertia of the blade,
I = 19.2 kg m^2
Torque = Moment of inertia x angular acceleration
500 = 19.2 x α
where, α be the angular acceleration
α = 26.04 rad/s^2
Use first equation of motion
ω = ωo + αt
where t is the time taken by the propeller to reach 2000 rpm.
209.33 = 0 + 26.04 x t
t = 8.04 second
Thus, the time taken by the propeller is 8.04 second.