Compounds don't have atoms. Elements do.
All atoms of the same element have the same number of <em>protons</em>.
But they can have different numbers of neutrons and electrons.
Answer:
a) 4.485 kg b) 3.94 kg
Explanation:
since the maximum tension the line can stand is 44 N and for question a the speed is constant (acceleration must be zero since the velocity or speed is not changing), F(tension) = mass * acceleration due to gravity (g) .
44 = m * 9.81m/s^2
m = 44/9.81 = 4.485kg
b) F(tension) = ma + mg ( where a is the acceleration of the body and g is the acceleration of the gravity)
44 = m (a +g)
44 = m (1.37 + 9.81)
44/11.18 = m
m = 3.94 kg
The correct choice is
B) false
as the wave moves from a less dense medium to a denser one, the frequency of the wave does not change. we know that the energy of the wave directly depends on the frequency. Since the frequency of wave does not change while moving from less dense medium to more dense medium, the energy of the wave does not change.
Answer:
The current in the small radius loop must be 0.9677 A
Explanation:
Recall that the formula for the magnetic field at the center of a loop of radius R which runs a current I, is given by:
therefore for the first loop in the problem, that magnetic field strength is:
with the direction of the magnetic field towards the plane.
For the second smaller loop of wire, since the current goes counterclockwise, the magnetic field will be pointing coming out of the plane, and will subtract from the othe field. In order to the addition of these two magnetic fields to be zero, the magnitudes of them have to be equal, that is: