Answer:
34.4Joules
Explanation:
Complete question
a man is trying to pull a box a distance of 3 m with a force of 20 N that makes a 35º with the horizontal. Find the workdone
Work done = Fdsin theta
Force F = 20N
distance d = 3m
theta = 35 degrees
Substitute
Workdone = 20(3)sin 35
Workdone = 60sin35
Workdone = 34.4Joules
Hence the workdone by the man is 34.4Joules
An element may have several isotopes that contain different numbers of NEUTRONS but the same number of PROTONS.
Do you have a diagram or anything?
Answer: B. Aligned with the geographic North Pole
Explanation:
According to classical physics, a magnetic field always has two associated magnetic poles (north and south), the same happens with magnets.
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 <u>the north pole is where the magnetic lines of force leave the magnet </u>and <u>the south pole is where the magnetic lines of force enter the magnet. </u>
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 <u>near the geographic north pole</u>.
However, the Earth magnetic field is changing, which means the magnetic poles are slowly moving.
