Answer:
W = 100000 J = 100 KJ
Explanation:
Here we will use the most basic and general formula of work, which is as follows:
![W = Fd](https://tex.z-dn.net/?f=W%20%3D%20Fd)
where,
W = Work Done = ?
F = Force Required = 200 N
d = Length of Track = 500 m
Therefore,
![W = (200\ N)(500\ m)\\](https://tex.z-dn.net/?f=W%20%3D%20%28200%5C%20N%29%28500%5C%20m%29%5C%5C)
<u>W = 100000 J = 100 KJ</u>
Wave speed (m/s) = frequency (Hz) x wave length (m)
=0.2 x 100= 20m/s
Answer:
d, Due to all reasons in a, b and c
Explanation:
All of the reasons from the choices can lead to errors in measurement. An error is an uncertainty introduced to a scientific process.
Errors can be due to the following reasons;
- It can be to a poor technician; an inexperienced scientist can introduce serious into their set up. Even when recording their observation, a dearth of experience can lead to error.
- Faulty apparatus can also lead to errors in measurement. An instrument that is poorly calibrated can also result in measurement errors.
- An inappropriate scientific method or measuring guidelines can also lead to errors in measurements.