Upon comparison, it is evident that the student with the highest percent error is A. Student 4, who measured 9.61 m/s². Four students recorded the acceleration of gravity, with the accepted local value being 9.78 m/s². Now let's find out which student's measurement exhibited the greatest percent error.
I would choose B or D, based on the location. If it’s situated in South Kensington, London, then D might be appropriate. Conversely, if it’s in an underprivileged area, I'd opt for B.
0.04m²
Explanation:
Known values:
Pressure = 250000Pa
Weight = 40000N
Unknown:
Area of each foot =?
Solution:
Pressure is defined as the force applied per unit area of an object
Pressure = 
To determine the area;
Area = 
Area =
= 0.16m²
The force exerted by all four feet amounts to 0.16m²
thus, the area for each foot is
= 0.04m²
Learn more:
Pressure
1950 g This is the result of lead being spread out in kilograms
Answer:
At this position, the magnetic field equals ZERO
Explanation:
The magnetic field produced by a moving charge is described as

Here, we determine the direction of the magnetic field using

Thus, we find

Leading to a magnetic field of ZERO
Consequently, when the charge moves in the same line as the given position vector, the magnetic field will be nonexistent