Answer:
5.73kg
Explanation:
Given data
Height = 8m
Potential Energy = 450J
Required
The mass of the object
From the following expression
PE=mgh
we can substitute g= 9.81m/s^2 and the other parameters to get mass m
450= m*9.81*8
450= m* 78.48
m= 450/78.48
m= 5.73kg
Hence the mass is 5.73kg
Answer:True
Explanation:
Buoyant force is the net upward force, that affect on the object in a fluid
Answer:
a. The thickness of the wire is 2.5 mm.
b. The wire is 0.25 cm thick.
Explanation:
Number of turns of the wire = 10
The length of total turns = 25 mm
a. The thickness of the wire can be determined by;
thickness of the wire = 
= 
= 2.5 mm
Therefore, the wire is 2.5 mm thick.
b. To determine the thickness of the wire in centimetre;
10 mm = 1 cm
So that,
2.5 mm = x
x = 
= 0.25 cm
The wire is 0.25 cm thick.
Answer:
A, The same amount of gravity
Explanation: