Answer:

Explanation:
Given,
Magnetic field,B = 0.5 x 10⁻⁴ T
distance,r= 15 cm = 0.15 m
Current = ?
Using Ampere's law of magnetic field




Current in the wire is equal to 
Answer:
D
Explanation:
This is a beta decay so the atomic number goes up by one thus becoming an argon isotope in the process.
Answer:
50m/s²
Explanation:
cross muliplyy write down the values acceleration and force
Answer:
resonance
Explanation:
The particles of substance B will cause the particle of substance A to vibrate at the same frequency