Answer: Option (B) is the correct answer.
Explanation:
Direct current is a current which flows in one direction, that is, flow of electrons is only in one direction.
Whereas alternate current is a current which reverses periodically, that is, there will be change in direction of electrons after a period of time.
Thus, we can conclude that the statement, In DC, electrons move in only one direction. In AC, electrons move in one direction and then in the other direction defines AC and DC correctly.
A) Both players are moving by uniformly accelerated motion, and we can write the position at time t of each of the two players as follows:


where

is the acceleration of the first player

is the acceleration of the second player

is the initial distance between the two players
and where I put a negative sign in front of the acceleration of the second player, since he's moving in the opposite direction of the first player.
The time t at which the two players collide is the time t at which

, therefore:

from whic we find

b) We can use the equation of

to find how far the first player run in t=8.5 s:
Answer:
binomial nomenclature.
Explanation:
This means that an organism's scientific name is a combination of two terms.
The first is the name of the organism's genus, and the second is the name of the organism's species
together the genus and the species create the name of a single organism.
Answer:
The magnitude of the average emf induced in the coil is approximately o.32 V.
Explanation:
As, no. of loops = N = 10
Area = 0.23 m^2
Magnetic field = B = 0.047 T
Δt = 0.34 s
These are the given things now we have to find the EMF. So the formula of emf is:
emf = e = N×ΔФ/Δt
Therefore, ΔФ = B . ΔA = BΔAcos(θ)
Since, flux is maximum so θ = 0 and cos(0) = 1
Then,
ΔФ = BA
e = N×(BΔA)/Δt
e = 10×(0.047×0.23)/0.34
e = 0.317 V.
So, we can write it by rounding off the digit
e ≅ 0.32 V.
Answer:
acceleration in the new orbit is 8 time of acceleration of planet in old orbit

Explanation:
given data:
radius of orbit = R
Speed pf planet = v
new radius = 0.5R
new speed = 2v
we know that acce;ration is given as





acceleration in the new orbit is 8 time of acceleration of planet in old orbit