The formula for the torque is
<span>τf = p F
where
</span><span>τf is the torque
p is the distance where the force is applied by the tendon
F is force applied by the tendon
If there are given values, substitute in the equation and solve for the torque.</span>
Answer:
462000J
Explanation:
Quantity of heat= mass x specific heat capacity of iron x change in temp
specific heat capacity of iron is 462J/Kg/K
change in temp = 250-50= 200°C
200°C is equivalent to 200K since 1°C is 1K
Q= mct
= 5x462x200
= 462000J
Answer:410 Hz
Explanation:
It is given that frequency of tuning fork is 415 Hz and hears a beat of 5 beat per second
so untuned frequency must be either 410 Hz or 420 Hz because beat frequency is the difference in frequency of two notes.
When she tightens the string the beat frequency decrease
and velocity 
where 



where T=tension
it T increase v also increases and from 1 st equation frequency is also increasing therefore untuned frequency must be 410 Hz because beat frequency is decreasing.
Answer:
The magnitude of the net electric field is 
Explanation:
Given that,
Charge density 
Charge density 
Distance 
Distance 
We need to calculate the magnitude of the net electric field
Using formula of electric field


Put the value into the formula


Hence, The magnitude of the net electric field is 
Answer:
Pendulum B
Explanation:
The time period of a pendulum is given by :

Case 1.
Mass, m = 200 g = 0.2 kg
Length of string, l = 1 m
Time, 
T₁ = 2.007 Seconds
Since, 

f₁ = 0.49 Hz
Case 2.
Mass, m = 400 g = 0.4 kg
Length of string, l = 0.5 m
Time, 
T₂ = 1.41 seconds


f₂ = 0.709 seconds
Hence, pendulum B have highest frequency of vibration.