Answer:
Highest point reached = 3.37 m
Explanation:
Initial velocity, = 7.1 m/s
Initial vertical velocity = 7.1 sin 61 = 6.21 m/s
Consider the vertical motion of skateboarder,
We have equation of motion, v² = u² + 2as
Initial velocity, u = 6.21 m/s
Acceleration, a = -9.81 m/s²
Final velocity, v = 0 m/s
Substituting
v² = u² + 2as
0² = 6.21² + 2 x -9.81 x s
s = 1.97 m
So from ramp the position it goes up by 1.97 m
Highest point reached = 1.97 + 1.4 = 3.37 m
The 60 and the 5 in parallel have an equivalent resistance of 4.615 ohms. (rounded). The 10 in series makes it 14.615...
Answer:
A) The north pole of a bar magnet will attract the south pole of another bar magnet.
B) Earth's geographic north pole is actually a magnetic south pole.
E) The south poles of two bar magnets will repel each other.
Explanation:
<u>According to </u><u>classical physics</u>, a magnetic field always has two associated magnetic poles (north and south), the same happens with magnets. This means that if we break a magnet in half, we will have two magnets, where each new magnet will have a new south pole, and a new north pole.
This is because <u>for classical physics, naturally, magnetic monopoles can not exist. </u>
In this context, Earth is similar to a magnetic bar with a north pole and a south pole. This means, the axis that crosses the Earth from pole to pole is like a big magnet.
Now, by convention, on all magnets the north pole is where the magnetic lines of force leave the magnet and the south pole is where the magnetic lines of force enter the magnet.
Then, for the case of the Earth, the north pole of the magnet is located towards the geographic south pole and the south pole of the magnet is near the geographic north pole.
And it is for this reason, moreover, that the magnetic field lines enter the Earth through its magnetic south pole (which is the geographic north pole).
Distant objects in the universe moving away from Earth because the universe is expanding.
There are 3 iron atoms per molecule of iron oxide.