Select the list which contains only SI basic units.
Candela, kelvin, meter, second.
Joule, kelvin, kilogram, watt.
Joule, newton, second, watt.
Liter, meter, second, watt.
A cylindrical tube rolling down a slope of inclination θ moves a distance L in time T. The equation relating these quantities is as in the figure. Where a is the internal radius of the tube and P and Q are constants. Which line gives the correct units for P and Q?
D.
A.
C.
B.
The magnitude of the force, F, between two masses m1 and m2 separated by a distance r is given by the expression.
F=(Gm1 m2)/r2 The base units for G are
kg⁻¹ ms⁻².
kg³ m³ s⁻².
kgm³ s⁻².
kg⁻¹ m³ s⁻².
Which of the following has units kg m² s⁻²?
Energy.
Pressure.
Power.
Momentum.
The SI unit of mutual inductance is the henry (H). Which of the following units is equivalent to the henry?
kgm²A⁻¹s⁻².
kgm²A⁻²s⁻¹.
Ωs.
kgm²s⁻⁴.
