Answer:
and
Explanation:
a) We need first to identify the Period from the one-quarte 'time' given. That is
Then the period is,
From this Period we can calculate the radio,
Rearrange for r,
We know can calculate the Magnetic force,
b) To find the charge we only use the Force in terms of the electric field, that is
Rearrange to q,
Answer:
19.2 m/s
Explanation:
The train is moving at 18 m/s and you are walking in the same direction (east) so the speeds are added
18 + 1.2 = 19.2
If you were walking backwards (west) your velocity with respect to the ground would be
18 - 1.2 = 16.8
(a) The momentum of a moving object is given by:
where m is the mass of the object and v is its speed. In this problem, the mass of the elephant is and its speed is , therefore its momentum is
(b) We can use the same formula to calculate the momentum of the tranquilizer dart, whose mass is and whose speed is :
we see that the elephant's momentum is much larger than the momentum of the dart.
(c) Again, using the same formula, the mass of the hunter is , his speed is , therefore his momentum is