It should be gown, mask, gloves, and then goggles!
Momentum is proportional to mass.
This is the more the mass the higher the momentum.
Linear momentum, p = mass * velocity, so you can see the direct relation: at constant velocity if the mass is duplicted the linear momentum is duplicated.
Angular momentum, L = moment of inertia * angular velocity.
So the moment of inertia is to the angular momentum as mass is to the llinear momentum.
Moment of inertia takes into account how the mass is distribuited around the rotation axis.
Explanation :
As the ambulance got closer, Marge noticed that the pitch of the siren got higher. This is due to the Doppler's effect.
The siren of the ambulance has a higher pitch when it approaches Marge. When the waves move away from him, it will have a lower pitch.
As the waves come closer to us, the waves become compressed and hence the frequency of the wave increases.
We have the relation
where denotes the velocity of a body A relative to another body B; here I use B for boat, E for Earth, and R for river.
We're given speeds
Let's assume the river flows South-to-North, so that
and let be the angle made by the boat relative to East (i.e. -90° corresponds to due South, 0° to due East, and +90° to due North), so that
Then the velocity of the boat relative to the Earth is
The crossing is 153.0 m wide, so that for some time we have
which is minimized when so the crossing takes the minimum 30.0 s when the boat is pointing due East.
It follows that
The boat's position at time is
so that after 30.0 s, the boat's final position on the other side of the river is
and the boat would have traveled a total distance of
Answer:
K remains constant
Explanation:
The magnetic force does not do any work on the ion.
In fact, the magnetic force due to a magnetic field is always perpendicular to the motion of the charge itself. Keep in mind that the work done by a force is given by
where F is the magnitude of the force, d is the displacement of the particle, and is the angle between the direction of the force and the displacement. Since the magnetic force is perpendicular to the displacement of the ion, then and , so the work done is zero.
For the work-energy theorem, the work done on the ion is equal to the variation of its kinetic energy:
However, since W=0, then , which means that the kinetic energy of the ion does not change.