Answer:
It can be said to be reliable although it is not valid
Explanation:
This is because Reliability means an indicator of consistency, A measure should produce similar or the same results consistently if it measures the same quantity. So does the thermometer measures over 5days but it is not valid because it deviates from the real value
Answer:
4.96 × 10⁵ Pa
Explanation:
F = mg
![F = (m_{person}+m_{stool})g\\\\F = (4.5 + 89)*9.8\\\\F = 916.3 N](https://tex.z-dn.net/?f=F%20%3D%20%28m_%7Bperson%7D%2Bm_%7Bstool%7D%29g%5C%5C%5C%5CF%20%3D%20%20%284.5%20%2B%2089%29%2A9.8%5C%5C%5C%5CF%20%3D%20916.3%20N)
This force is evenly distributed on the three leg
radius, r = d/2
= 2.8 / 2
= 1.4 cm = 0.014 m
total cross sectional area of the three legs, A = 3*pi*r^2
![= 3\times\pi \times0.014^2\\\\= 1.847\times10^-^3m^2](https://tex.z-dn.net/?f=%3D%203%5Ctimes%5Cpi%20%5Ctimes0.014%5E2%5C%5C%5C%5C%3D%201.847%5Ctimes10%5E-%5E3m%5E2)
Pressure due to weight,
P = Weight/A
![P = / 1.847 × 10⁻³\\P = \frac{ 916.3N}{1.847\times10^-^3} \\\\P= 496032.9Pa](https://tex.z-dn.net/?f=P%20%3D%20%2F%201.847%20%C3%97%2010%E2%81%BB%C2%B3%5C%5CP%20%3D%20%5Cfrac%7B%20916.3N%7D%7B1.847%5Ctimes10%5E-%5E3%7D%20%5C%5C%5C%5CP%3D%20496032.9Pa)
P = 4.96 × 10⁵ Pa
That's unaccelerated motion,
and constant velocity.
Answer:
i really thought that said hater