Answer:
Length of the pendulum will be 3.987 m
Explanation:
We have given time period of the pendulum T = 8 sec
Acceleration due to gravity ![g=9.81m/sec^2](https://tex.z-dn.net/?f=g%3D9.81m%2Fsec%5E2)
We have to find the length of the simple pendulum
We know that time period of the simple pendulum is given by
![T=2\pi \sqrt{\frac{l}{g}}](https://tex.z-dn.net/?f=T%3D2%5Cpi%20%5Csqrt%7B%5Cfrac%7Bl%7D%7Bg%7D%7D)
![8=2\times 3.14 \sqrt{\frac{l}{9.81}}](https://tex.z-dn.net/?f=8%3D2%5Ctimes%203.14%20%5Csqrt%7B%5Cfrac%7Bl%7D%7B9.81%7D%7D)
![l=3.987m](https://tex.z-dn.net/?f=l%3D3.987m)
So length of the pendulum will be 3.987 m
Answer:
1421 seconds or 23.67 minutes
Explanation:
Q = Heat = 1200 W
c = Specific heat of human body = 3480 J/kgK
= Change in temperature = (44-37)°C
t = Time taken
![Q=\dfrac{mc\Delta T}{t}\\\Rightarrow t=\dfrac{mc\Delta T}{Q}\\\Rightarrow t=\dfrac{70\times 3480\times (44-37)}{1200}\\\Rightarrow t=1421\ s](https://tex.z-dn.net/?f=Q%3D%5Cdfrac%7Bmc%5CDelta%20T%7D%7Bt%7D%5C%5C%5CRightarrow%20t%3D%5Cdfrac%7Bmc%5CDelta%20T%7D%7BQ%7D%5C%5C%5CRightarrow%20t%3D%5Cdfrac%7B70%5Ctimes%203480%5Ctimes%20%2844-37%29%7D%7B1200%7D%5C%5C%5CRightarrow%20t%3D1421%5C%20s)
The time student jogs before irreversible body damage occurs is 1421 seconds or 23.67 minutes
<em>The net force required to give a 25kg crate an acceleration of 2.2m/s^2 to the right is;</em>
25 x 2.2
= 55 N
A well tested concept that explains a wide range of observations is called a Scientific theory