Answer:1.8 hr
Explanation:
Given
mass of cargo=500,000 kg
initial speed
Frictional force=85 v
at t=0 engine is shut off so acquired speed is slowly decreasing
Integrating both sides
t=6462.425 s
t=1.8 hr
(D)
Explanation:
The more massive an object is, the greater is the curvature that they produce on the space-time around it.
B. Chemical change,new substances were formed
Answer:
The potential difference between the ends of a wire is 60 volts.
Explanation:
It is given that,
Resistance, R = 5 ohms
Charge, q = 720 C
Time, t = 1 min = 60 s
We know that the charge flowing per unit charge is called current in the circuit. It is given by :
I = 12 A
Let V is the potential difference between the ends of a wire. It can be calculated using Ohm's law as :
V = IR
V = 60 Volts
So, the potential difference between the ends of a wire is 60 volts. Hence, this is the required solution.