Answer:
3Q / 4 pi (R^3 - r^3)
Explanation:
Charge density = charge / volume
volume of a spherical shell =
Answer:
The runners are 0.159 mi to the west of the flagpole.
Explanation:
Let´s place the origin of the frame of reference at the point where the flagpole is located.
The initial position of runner A is 3.91 mi and his velocity is -6.04 mi/h
The initial position of runner B is -2.95 mi and his velocity is 5.00 mi/h
When both runners meet, their position is the same. The equation of the position of each runner is:
x = x0 + v · t
Where
x = position at time t
x0 = initial position
v = velocity
t = time
Then, at the meeting point:
x runner A = x runner B
3.91 mi - 6.04 mi/h · t = -2.95 mi + 5.00m/h · t
Solving for t:
3.91 mi + 2.95 mi = 5.00m/h · t + 6.04 mi/h · t
6.86 mi = 11.04 mi/h · t
t = 0.621 h
Now, we use this time to find the meeting point. We can use the equation of any runner. Let´s use the position of runner A:
x = 3.91 mi - 6.04 mi/h · 0.621 h = 0.159 mi
Since the position is positive, the runners met 0.159 mi to the west of the flagpole.
Answer is a. Doubles
when the loops are increased in the coil then the magnetic field created doubles
When particles in a substance slow down, we can infer that the object is getting colder. Why we can infer this:
1. Kinetic energy, is energy due to motion, therefore if there is no motion, there is no kinetic energy.
2. The colder an object get, the closer it becomes to having it's particles stopping completely, eventually at the absolute zero.
3. As kinetic energy increases, particles move faster. Kinetic energy usually increases when an object gets warmer. As kinetic energy decreases, particles move slower. Kinetic energy usually decreases when an object gets colder.
So, with this information, we now how and why the kinetic energy slows down.