Answer:
Explanation:
First of all, let's convert 2.0 rev into radians:
This means that the angular speed of the wheel is
The angle through which the wheel rotates in a time t is given by
And substituting t=1.0 s, we find
Answer: The correct answer is a.
Explanation:
Electromagnetic wave is a wave in which the magnetic field and the electric field are perpendicular to each other.
Both fields are directed in the direction of the propagation of the electromagnetic wave. It travels with the speed of the light.
The motion of the electric field produces both electric field and the magnetic field.
The electromagnetic waves are produced when an electric charge vibrates or accelerates.
Therefore, the correct option is (a).
Answer: 5.76 rads/s
Explanation:
The initial rotation is 55 rpm
1 rev = 2π radians
55 revs = 55 × 2π/1 = 345.58 radians/min
345.58 rads/min = 345.58rads/60s = 5.76 rads/s
The balance chemical reaction is:
<span>6 Li(s) + N2(g) → 2 Li3N(s)
We use the amount of the Lithium reactant and the relations of the substances from the reaction to calculate the amount of product produced. We do as follows:
1.75 mol Li ( 2 mol Li3N / 6 mol Li ) (34.83 g / mol) = 20.32 g Li</span>
Answer:
US Fish and Wildlife Service
Explanation:
The federal agency that helps foreign governments with international conservation efforts are the US Fish and Wildlife Service. This organization focus includes enforcing federal wildlife laws, protecting endangered species, manage migratory birds, restoring nationally significant fisheries; conserving and restoring wildlife habitat, such as wetlands, and even helping foreign governments with their international conservation efforts.
