Answer:
<h2>10,000 kg</h2>
Explanation:
The mass of the train can be found by using the formula

k is the kinetic energy
v is the velocity
From the question we have

We have the final answer as
<h3>10,000 kg</h3>
Hope this helps you
It will take at least 3 hours for them to get to Bridgeport
Answer:
The force exerted on the rock by the eruption is, D. 902.5 N
Explanation:
Given data,
The mass of the rock ejected by the volcano, m = 95 kg
The acceleration of the ejected rock, a 9.5 m/s²
The force acting on an object is defined as the product of the mass and its acceleration. It is given by the relation,
F = m x a
= 95 x 9.5
= 902.5 N
Hence, the force exerted on the rock by the eruption is, F = 902.5 N
Answer:

Explanation:
t = Time taken = 
i = Current = 3 A
q(0) = Initial charge =
Charge is given by

The magnitude of the net electric charge of the capacitor is 