1. Answer: 7.75 seconds
Explanation: 76-14=62 metres
62/8=7.75 seconds
2. Answer: 2.5 seconds
Explanation: 28-18=10 metres
10/4=2.5 seconds
0.0003321 Newtons
Explanation
We are given the charge, its velocity, and the magnetic field strength and direction. We can thus use the equation to find the force

so
Step 1
Let

now, replace

so, the answer is
0.0003321 Newtons
I hope this helps you
Answer:
1.65×10⁻⁶ N
Explanation:
m = Mass of ant = 
r = Radius = 50 m
t = Time taken to complete on rotation = 60 seconds
Angular velocity

Centripetal acceleration is force that is acting outward

The magnitude of the upward force felt by the ant due to the second hand would be 1.65×10⁻⁶ N
Average speed = (total distance) / (total time)
Total distance = (70km + 104km + 79km) = 253 km
Total time = (2hr + 1.5hr + 2hr) = 5.5 hrs
Average speed = (253 km) / (5.5 hrs)
<em>Average speed = 46 km/hr</em>