Answer:
The correct answer is option a.
Explanation:
Conservation of momentum :

Where :
= masses of object collided
= initial velocity before collision
= final velocity after collision
We have :
Two equal-mass carts roll towards each other.

Initial velocity of 
Initial velocity of
(opposite direction)
Final velocity of
(same direction )
Final velocity of
(same direction)


v = 0.5 m/s
rg135
The speed of the carts after their collision is 0.5 m/s.
Answer:
9.67 A
Explanation:
The weight of a student with a mass of m = 75 kg is:

where g=9.8 m/s^2 is the acceleration due to gravity.
We want the magnetic force on the wire to be equal to this weight. The magnetic force on the wire is

where
I is the current in the wire
L = 2.0 m is the length of the wire
B = 38 T is the magnetic field
is the angle between the direction of B and L
Since we want W=F, we can write

And we can solve it to find the current I:

Answer:
Distance traveled will be 
Explanation:
We have given speed of the light 
We have to find the distance traveled by light in 1 year
We know that 1 year = 8760 hour
And 1 hour = 60×60 = 3600 sec
So 1 year 
We know that distance = speed × time
So distance traveled by light in one year 
We have to fond the distance in km
As we know that 1 km = 1000 m
So 
Answer:
There's a formula for finding the coefficient of friction i.e. μ = f÷N
hope it helps!
Answer:
The magnets need to be placed with red closest to blue.
Opposite poles attract.
The magnets will be attracted to each other with enough force to stick together.
Explanation: