Answer:
F = 200 N
Explanation:
Given that,
Mass of the object, m = 20 kg
The acceleration of the object, a = 10 m/s²
We need to find the force exerted by the object. The force acting on the object is given by :
F = ma
So,
So, 200 N of force was exerted by the object.
This question is incomplete, the complete question is on the image uploaded along this answer.
Answer:
the potential at point B is 5 V, Option d) is the correct answer
Explanation:
Given that;
from the image;
R = 3 + 4 + 5 = 12 Ω
so I = 12/12 = 1 A
Q = 0 + 12 = 12 V
now
VA - VQ = - I × 3 = -3 V
VA = VQ - 3 = 12 - 3 = 9 V
VB - VA = - I × 4Ω = - 4 V
⇒VB = VA - 4 = 9 V - 4 V = 5 V
Therefore the potential at point B is 5 V
Option d) is the correct answer
Answer:
Explanation:
given,
frequency emitted by the speaker(f) = 230 Hz
beat frequency = 1 Hz
speed of the sound (v)= 344 m/s
velocity of the platform = ?
frequency heard by the observer
f_d = 230 Hz + 1 Hz
f_d = 231 Hz
using ,