B is the correct answer i guess
Fk= mgcostheta * coefficient of friction
Fk= (.05kg)(9.80)(cos30)(.20)=.085 N
change in thermal energy= Fk* distance covered up slope (d)
change in thermal energy = .085 * d
the final height so y=dsin30
Kf + Uf + change in thermal energy = Ki + Ui
(.05kg)(9.80)(dsin30) + (.085d) = (.5)(25 N/m)(.1m)^2
d= .379 m = 37.9 cm
In salty water ions are produced by the salt
here salt is NaCl
so it will break in Na⁺ and Cl⁻
They carry the current
Na⁺ moves towards cathode and Cl⁻ moves towards anode
So current is carrying by ions which are Na⁺ and Cl⁻
A. The shirt reflects the yellow wavelengths
It would be B) because if the tank was to leak it would be harmful