Answer:Luster aka (A)
Explanation:Because luster is something you learned in science.
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Answer:
The mass of the second student is 20.180 Kg
Explanation:
When the mass is added on one piston, it causes a change in pressure on other piston.
The change in mass is calculated using the formula,
Δm=ρhA/g
The calculated radius of piston is 0.46 m.
Given h=35 cm= 0.35 m.
Assume ρ=850 kg/m^3
So Δm=850*0.35*π*(0.46)^2/9.8
Δm= 20.180 Kg
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Answer: +2 e
Explanation: Net charge of a system is sum of charges on all the constituents of the system.
The system contains two spheres. Charge on one sphere is:
q₁ = +6 e
Charge on the second sphere is:
q₂ = -4 e
Net charge of the system is:
q = q₁ + q₂
q = +6 e + (-4 e) = + 2 e
Thus, the net charge of system is +2 e.
