Answer:
Option C=> π+.
Explanation:
Just as it is given in the question above, we can see that the addition or combination of proton and neutron gives what is known as QUARKS.
Quarks are not easily measured because one can not see and study a quark independently; quarks move in multiples together.
The study of Quarks is very important in physics because they relate very well with electromagnetic force, strong force, weak force and Gravitational force.
"...When the remaining quarks combine to form a single particle, it is a π+".
π+ is a meson or a pion and it contains quarks and anti-quarks too
Answer:
300 meters south
Explanation:
Displacement is a vector that connects the initial position with the final position of the motion.
In order to find the net displacement, we must add the distance covered in each part of the motion, considering the proper sign. We take the following convention:
North --> +
South --> -
So, John made the following trips:
Home --> school: 250 m north = +250
School --> home: 250 m south = -250
Home --> school: 250 m north = +250 m
School --> friend's house: 550 m south = -550 m
So, the net displacement is
d = +250 -250 +250 -550 = -300
So, 300 m south.
So it’s 4km/h
We divide 8/4
2 hours
There’s frictional force acting on the sphere, which causes it to gradually slow down, and eventually come to a stop.
It really doesn't matter how long the flight of stairs is. What we really need to know is how much height Mary gained, straight up. We don't know that. If we knew the height then the total amount of work she did would be 87 x the height in meters. The unit is joules. Then the power she delivered would be that number divided by the six seconds and that unit is watts.
By the way ... it's troubling that Mary's weight is only about 20 pounds. It's doubtful that such a tiny creature could run up a flight of stairs.
